211ca15cb4
2009-04-27 Richard Guenther <rguenther@suse.de> * tree-cfg.c (remove_useless_stmts): Verify stmts afterwards. (verify_stmts): Dispatch to gimple/type verification code. * tree-inline.c (remap_gimple_op_r): Work around C++ FE issue with call argument types. java/ PR java/38374 * constants.c (build_constants_constructor): Retain the old pointer type as valid TYPE_POINTER_TO after patching the type of the constant pool decl. From-SVN: r146831
4549 lines
136 KiB
C
4549 lines
136 KiB
C
/* Tree inlining.
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Copyright 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
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Free Software Foundation, Inc.
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Contributed by Alexandre Oliva <aoliva@redhat.com>
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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GCC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING3. If not see
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<http://www.gnu.org/licenses/>. */
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#include "config.h"
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#include "system.h"
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#include "coretypes.h"
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#include "tm.h"
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#include "toplev.h"
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#include "tree.h"
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#include "tree-inline.h"
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#include "rtl.h"
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#include "expr.h"
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#include "flags.h"
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#include "params.h"
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#include "input.h"
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#include "insn-config.h"
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#include "varray.h"
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#include "hashtab.h"
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#include "langhooks.h"
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#include "basic-block.h"
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#include "tree-iterator.h"
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#include "cgraph.h"
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#include "intl.h"
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#include "tree-mudflap.h"
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#include "tree-flow.h"
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#include "function.h"
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#include "ggc.h"
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#include "tree-flow.h"
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#include "diagnostic.h"
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#include "except.h"
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#include "debug.h"
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#include "pointer-set.h"
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#include "ipa-prop.h"
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#include "value-prof.h"
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#include "tree-pass.h"
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#include "target.h"
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#include "integrate.h"
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/* I'm not real happy about this, but we need to handle gimple and
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non-gimple trees. */
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#include "gimple.h"
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/* Inlining, Cloning, Versioning, Parallelization
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Inlining: a function body is duplicated, but the PARM_DECLs are
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remapped into VAR_DECLs, and non-void RETURN_EXPRs become
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MODIFY_EXPRs that store to a dedicated returned-value variable.
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The duplicated eh_region info of the copy will later be appended
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to the info for the caller; the eh_region info in copied throwing
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statements and RESX_EXPRs is adjusted accordingly.
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Cloning: (only in C++) We have one body for a con/de/structor, and
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multiple function decls, each with a unique parameter list.
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Duplicate the body, using the given splay tree; some parameters
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will become constants (like 0 or 1).
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Versioning: a function body is duplicated and the result is a new
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function rather than into blocks of an existing function as with
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inlining. Some parameters will become constants.
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Parallelization: a region of a function is duplicated resulting in
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a new function. Variables may be replaced with complex expressions
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to enable shared variable semantics.
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All of these will simultaneously lookup any callgraph edges. If
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we're going to inline the duplicated function body, and the given
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function has some cloned callgraph nodes (one for each place this
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function will be inlined) those callgraph edges will be duplicated.
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If we're cloning the body, those callgraph edges will be
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updated to point into the new body. (Note that the original
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callgraph node and edge list will not be altered.)
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See the CALL_EXPR handling case in copy_tree_body_r (). */
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/* To Do:
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o In order to make inlining-on-trees work, we pessimized
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function-local static constants. In particular, they are now
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always output, even when not addressed. Fix this by treating
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function-local static constants just like global static
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constants; the back-end already knows not to output them if they
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are not needed.
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o Provide heuristics to clamp inlining of recursive template
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calls? */
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/* Weights that estimate_num_insns uses for heuristics in inlining. */
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eni_weights eni_inlining_weights;
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/* Weights that estimate_num_insns uses to estimate the size of the
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produced code. */
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eni_weights eni_size_weights;
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/* Weights that estimate_num_insns uses to estimate the time necessary
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to execute the produced code. */
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eni_weights eni_time_weights;
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/* Prototypes. */
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static tree declare_return_variable (copy_body_data *, tree, tree, tree *);
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static bool inlinable_function_p (tree);
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static void remap_block (tree *, copy_body_data *);
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static void copy_bind_expr (tree *, int *, copy_body_data *);
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static tree mark_local_for_remap_r (tree *, int *, void *);
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static void unsave_expr_1 (tree);
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static tree unsave_r (tree *, int *, void *);
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static void declare_inline_vars (tree, tree);
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static void remap_save_expr (tree *, void *, int *);
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static void prepend_lexical_block (tree current_block, tree new_block);
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static tree copy_decl_to_var (tree, copy_body_data *);
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static tree copy_result_decl_to_var (tree, copy_body_data *);
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static tree copy_decl_maybe_to_var (tree, copy_body_data *);
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static gimple remap_gimple_stmt (gimple, copy_body_data *);
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/* Insert a tree->tree mapping for ID. Despite the name suggests
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that the trees should be variables, it is used for more than that. */
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void
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insert_decl_map (copy_body_data *id, tree key, tree value)
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{
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*pointer_map_insert (id->decl_map, key) = value;
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/* Always insert an identity map as well. If we see this same new
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node again, we won't want to duplicate it a second time. */
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if (key != value)
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*pointer_map_insert (id->decl_map, value) = value;
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}
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/* Construct new SSA name for old NAME. ID is the inline context. */
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static tree
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remap_ssa_name (tree name, copy_body_data *id)
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{
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tree new_tree;
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tree *n;
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gcc_assert (TREE_CODE (name) == SSA_NAME);
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n = (tree *) pointer_map_contains (id->decl_map, name);
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if (n)
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return unshare_expr (*n);
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/* Do not set DEF_STMT yet as statement is not copied yet. We do that
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in copy_bb. */
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new_tree = remap_decl (SSA_NAME_VAR (name), id);
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/* We might've substituted constant or another SSA_NAME for
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the variable.
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Replace the SSA name representing RESULT_DECL by variable during
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inlining: this saves us from need to introduce PHI node in a case
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return value is just partly initialized. */
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if ((TREE_CODE (new_tree) == VAR_DECL || TREE_CODE (new_tree) == PARM_DECL)
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&& (TREE_CODE (SSA_NAME_VAR (name)) != RESULT_DECL
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|| !id->transform_return_to_modify))
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{
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new_tree = make_ssa_name (new_tree, NULL);
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insert_decl_map (id, name, new_tree);
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SSA_NAME_OCCURS_IN_ABNORMAL_PHI (new_tree)
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= SSA_NAME_OCCURS_IN_ABNORMAL_PHI (name);
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TREE_TYPE (new_tree) = TREE_TYPE (SSA_NAME_VAR (new_tree));
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if (gimple_nop_p (SSA_NAME_DEF_STMT (name)))
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{
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/* By inlining function having uninitialized variable, we might
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extend the lifetime (variable might get reused). This cause
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ICE in the case we end up extending lifetime of SSA name across
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abnormal edge, but also increase register pressure.
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We simply initialize all uninitialized vars by 0 except
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for case we are inlining to very first BB. We can avoid
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this for all BBs that are not inside strongly connected
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regions of the CFG, but this is expensive to test. */
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if (id->entry_bb
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&& is_gimple_reg (SSA_NAME_VAR (name))
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&& TREE_CODE (SSA_NAME_VAR (name)) != PARM_DECL
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&& (id->entry_bb != EDGE_SUCC (ENTRY_BLOCK_PTR, 0)->dest
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|| EDGE_COUNT (id->entry_bb->preds) != 1))
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{
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gimple_stmt_iterator gsi = gsi_last_bb (id->entry_bb);
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gimple init_stmt;
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init_stmt = gimple_build_assign (new_tree,
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fold_convert (TREE_TYPE (new_tree),
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integer_zero_node));
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gsi_insert_after (&gsi, init_stmt, GSI_NEW_STMT);
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SSA_NAME_IS_DEFAULT_DEF (new_tree) = 0;
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}
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else
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{
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SSA_NAME_DEF_STMT (new_tree) = gimple_build_nop ();
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if (gimple_default_def (id->src_cfun, SSA_NAME_VAR (name))
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== name)
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set_default_def (SSA_NAME_VAR (new_tree), new_tree);
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}
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}
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}
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else
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insert_decl_map (id, name, new_tree);
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return new_tree;
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}
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/* Remap DECL during the copying of the BLOCK tree for the function. */
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tree
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remap_decl (tree decl, copy_body_data *id)
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{
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tree *n;
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tree fn;
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/* We only remap local variables in the current function. */
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fn = id->src_fn;
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/* See if we have remapped this declaration. */
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n = (tree *) pointer_map_contains (id->decl_map, decl);
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/* If we didn't already have an equivalent for this declaration,
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create one now. */
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if (!n)
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{
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/* Make a copy of the variable or label. */
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tree t = id->copy_decl (decl, id);
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/* Remember it, so that if we encounter this local entity again
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we can reuse this copy. Do this early because remap_type may
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need this decl for TYPE_STUB_DECL. */
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insert_decl_map (id, decl, t);
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if (!DECL_P (t))
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return t;
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/* Remap types, if necessary. */
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TREE_TYPE (t) = remap_type (TREE_TYPE (t), id);
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if (TREE_CODE (t) == TYPE_DECL)
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DECL_ORIGINAL_TYPE (t) = remap_type (DECL_ORIGINAL_TYPE (t), id);
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/* Remap sizes as necessary. */
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walk_tree (&DECL_SIZE (t), copy_tree_body_r, id, NULL);
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walk_tree (&DECL_SIZE_UNIT (t), copy_tree_body_r, id, NULL);
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/* If fields, do likewise for offset and qualifier. */
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if (TREE_CODE (t) == FIELD_DECL)
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{
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walk_tree (&DECL_FIELD_OFFSET (t), copy_tree_body_r, id, NULL);
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if (TREE_CODE (DECL_CONTEXT (t)) == QUAL_UNION_TYPE)
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walk_tree (&DECL_QUALIFIER (t), copy_tree_body_r, id, NULL);
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}
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if (cfun && gimple_in_ssa_p (cfun)
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&& (TREE_CODE (t) == VAR_DECL
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|| TREE_CODE (t) == RESULT_DECL || TREE_CODE (t) == PARM_DECL))
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{
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tree def = gimple_default_def (id->src_cfun, decl);
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get_var_ann (t);
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if (TREE_CODE (decl) != PARM_DECL && def)
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{
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tree map = remap_ssa_name (def, id);
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/* Watch out RESULT_DECLs whose SSA names map directly
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to them. */
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if (TREE_CODE (map) == SSA_NAME
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&& gimple_nop_p (SSA_NAME_DEF_STMT (map)))
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set_default_def (t, map);
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}
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add_referenced_var (t);
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}
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return t;
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}
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return unshare_expr (*n);
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}
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static tree
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remap_type_1 (tree type, copy_body_data *id)
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{
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tree new_tree, t;
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/* We do need a copy. build and register it now. If this is a pointer or
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reference type, remap the designated type and make a new pointer or
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reference type. */
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if (TREE_CODE (type) == POINTER_TYPE)
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{
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new_tree = build_pointer_type_for_mode (remap_type (TREE_TYPE (type), id),
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TYPE_MODE (type),
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TYPE_REF_CAN_ALIAS_ALL (type));
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insert_decl_map (id, type, new_tree);
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return new_tree;
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}
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else if (TREE_CODE (type) == REFERENCE_TYPE)
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{
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new_tree = build_reference_type_for_mode (remap_type (TREE_TYPE (type), id),
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TYPE_MODE (type),
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TYPE_REF_CAN_ALIAS_ALL (type));
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insert_decl_map (id, type, new_tree);
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return new_tree;
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}
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else
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new_tree = copy_node (type);
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insert_decl_map (id, type, new_tree);
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/* This is a new type, not a copy of an old type. Need to reassociate
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variants. We can handle everything except the main variant lazily. */
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t = TYPE_MAIN_VARIANT (type);
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if (type != t)
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{
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t = remap_type (t, id);
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TYPE_MAIN_VARIANT (new_tree) = t;
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TYPE_NEXT_VARIANT (new_tree) = TYPE_NEXT_VARIANT (t);
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TYPE_NEXT_VARIANT (t) = new_tree;
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}
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else
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{
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TYPE_MAIN_VARIANT (new_tree) = new_tree;
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TYPE_NEXT_VARIANT (new_tree) = NULL;
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}
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if (TYPE_STUB_DECL (type))
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TYPE_STUB_DECL (new_tree) = remap_decl (TYPE_STUB_DECL (type), id);
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/* Lazily create pointer and reference types. */
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TYPE_POINTER_TO (new_tree) = NULL;
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TYPE_REFERENCE_TO (new_tree) = NULL;
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switch (TREE_CODE (new_tree))
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{
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case INTEGER_TYPE:
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case REAL_TYPE:
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case FIXED_POINT_TYPE:
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case ENUMERAL_TYPE:
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case BOOLEAN_TYPE:
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t = TYPE_MIN_VALUE (new_tree);
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if (t && TREE_CODE (t) != INTEGER_CST)
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walk_tree (&TYPE_MIN_VALUE (new_tree), copy_tree_body_r, id, NULL);
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t = TYPE_MAX_VALUE (new_tree);
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if (t && TREE_CODE (t) != INTEGER_CST)
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walk_tree (&TYPE_MAX_VALUE (new_tree), copy_tree_body_r, id, NULL);
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return new_tree;
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case FUNCTION_TYPE:
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TREE_TYPE (new_tree) = remap_type (TREE_TYPE (new_tree), id);
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walk_tree (&TYPE_ARG_TYPES (new_tree), copy_tree_body_r, id, NULL);
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return new_tree;
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case ARRAY_TYPE:
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TREE_TYPE (new_tree) = remap_type (TREE_TYPE (new_tree), id);
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TYPE_DOMAIN (new_tree) = remap_type (TYPE_DOMAIN (new_tree), id);
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break;
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case RECORD_TYPE:
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case UNION_TYPE:
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case QUAL_UNION_TYPE:
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{
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tree f, nf = NULL;
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for (f = TYPE_FIELDS (new_tree); f ; f = TREE_CHAIN (f))
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{
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t = remap_decl (f, id);
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DECL_CONTEXT (t) = new_tree;
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TREE_CHAIN (t) = nf;
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nf = t;
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}
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TYPE_FIELDS (new_tree) = nreverse (nf);
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}
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break;
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case OFFSET_TYPE:
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default:
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/* Shouldn't have been thought variable sized. */
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gcc_unreachable ();
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}
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walk_tree (&TYPE_SIZE (new_tree), copy_tree_body_r, id, NULL);
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walk_tree (&TYPE_SIZE_UNIT (new_tree), copy_tree_body_r, id, NULL);
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return new_tree;
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}
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tree
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remap_type (tree type, copy_body_data *id)
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{
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tree *node;
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tree tmp;
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if (type == NULL)
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return type;
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/* See if we have remapped this type. */
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node = (tree *) pointer_map_contains (id->decl_map, type);
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if (node)
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return *node;
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/* The type only needs remapping if it's variably modified. */
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if (! variably_modified_type_p (type, id->src_fn))
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{
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insert_decl_map (id, type, type);
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return type;
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}
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id->remapping_type_depth++;
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tmp = remap_type_1 (type, id);
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id->remapping_type_depth--;
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return tmp;
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}
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/* Return previously remapped type of TYPE in ID. Return NULL if TYPE
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is NULL or TYPE has not been remapped before. */
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static tree
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remapped_type (tree type, copy_body_data *id)
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{
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tree *node;
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if (type == NULL)
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return type;
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/* See if we have remapped this type. */
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node = (tree *) pointer_map_contains (id->decl_map, type);
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if (node)
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return *node;
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else
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return NULL;
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}
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/* The type only needs remapping if it's variably modified. */
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/* Decide if DECL can be put into BLOCK_NONLOCAL_VARs. */
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static bool
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can_be_nonlocal (tree decl, copy_body_data *id)
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{
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/* We can not duplicate function decls. */
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if (TREE_CODE (decl) == FUNCTION_DECL)
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return true;
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/* Local static vars must be non-local or we get multiple declaration
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problems. */
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if (TREE_CODE (decl) == VAR_DECL
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&& !auto_var_in_fn_p (decl, id->src_fn))
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return true;
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/* At the moment dwarf2out can handle only these types of nodes. We
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can support more later. */
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if (TREE_CODE (decl) != VAR_DECL && TREE_CODE (decl) != PARM_DECL)
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return false;
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/* We must use global type. We call remapped_type instead of
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remap_type since we don't want to remap this type here if it
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hasn't been remapped before. */
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if (TREE_TYPE (decl) != remapped_type (TREE_TYPE (decl), id))
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return false;
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/* Wihtout SSA we can't tell if variable is used. */
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if (!gimple_in_ssa_p (cfun))
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return false;
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/* Live variables must be copied so we can attach DECL_RTL. */
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if (var_ann (decl))
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
static tree
|
|
remap_decls (tree decls, VEC(tree,gc) **nonlocalized_list, copy_body_data *id)
|
|
{
|
|
tree old_var;
|
|
tree new_decls = NULL_TREE;
|
|
|
|
/* Remap its variables. */
|
|
for (old_var = decls; old_var; old_var = TREE_CHAIN (old_var))
|
|
{
|
|
tree new_var;
|
|
tree origin_var = DECL_ORIGIN (old_var);
|
|
|
|
if (can_be_nonlocal (old_var, id))
|
|
{
|
|
if (TREE_CODE (old_var) == VAR_DECL
|
|
&& (var_ann (old_var) || !gimple_in_ssa_p (cfun)))
|
|
cfun->local_decls = tree_cons (NULL_TREE, old_var,
|
|
cfun->local_decls);
|
|
if (debug_info_level > DINFO_LEVEL_TERSE
|
|
&& !DECL_IGNORED_P (old_var)
|
|
&& nonlocalized_list)
|
|
VEC_safe_push (tree, gc, *nonlocalized_list, origin_var);
|
|
continue;
|
|
}
|
|
|
|
/* Remap the variable. */
|
|
new_var = remap_decl (old_var, id);
|
|
|
|
/* If we didn't remap this variable, we can't mess with its
|
|
TREE_CHAIN. If we remapped this variable to the return slot, it's
|
|
already declared somewhere else, so don't declare it here. */
|
|
|
|
if (new_var == id->retvar)
|
|
;
|
|
else if (!new_var)
|
|
{
|
|
if (debug_info_level > DINFO_LEVEL_TERSE
|
|
&& !DECL_IGNORED_P (old_var)
|
|
&& nonlocalized_list)
|
|
VEC_safe_push (tree, gc, *nonlocalized_list, origin_var);
|
|
}
|
|
else
|
|
{
|
|
gcc_assert (DECL_P (new_var));
|
|
TREE_CHAIN (new_var) = new_decls;
|
|
new_decls = new_var;
|
|
}
|
|
}
|
|
|
|
return nreverse (new_decls);
|
|
}
|
|
|
|
/* Copy the BLOCK to contain remapped versions of the variables
|
|
therein. And hook the new block into the block-tree. */
|
|
|
|
static void
|
|
remap_block (tree *block, copy_body_data *id)
|
|
{
|
|
tree old_block;
|
|
tree new_block;
|
|
tree fn;
|
|
|
|
/* Make the new block. */
|
|
old_block = *block;
|
|
new_block = make_node (BLOCK);
|
|
TREE_USED (new_block) = TREE_USED (old_block);
|
|
BLOCK_ABSTRACT_ORIGIN (new_block) = old_block;
|
|
BLOCK_SOURCE_LOCATION (new_block) = BLOCK_SOURCE_LOCATION (old_block);
|
|
BLOCK_NONLOCALIZED_VARS (new_block)
|
|
= VEC_copy (tree, gc, BLOCK_NONLOCALIZED_VARS (old_block));
|
|
*block = new_block;
|
|
|
|
/* Remap its variables. */
|
|
BLOCK_VARS (new_block) = remap_decls (BLOCK_VARS (old_block),
|
|
&BLOCK_NONLOCALIZED_VARS (new_block),
|
|
id);
|
|
|
|
fn = id->dst_fn;
|
|
|
|
if (id->transform_lang_insert_block)
|
|
id->transform_lang_insert_block (new_block);
|
|
|
|
/* Remember the remapped block. */
|
|
insert_decl_map (id, old_block, new_block);
|
|
}
|
|
|
|
/* Copy the whole block tree and root it in id->block. */
|
|
static tree
|
|
remap_blocks (tree block, copy_body_data *id)
|
|
{
|
|
tree t;
|
|
tree new_tree = block;
|
|
|
|
if (!block)
|
|
return NULL;
|
|
|
|
remap_block (&new_tree, id);
|
|
gcc_assert (new_tree != block);
|
|
for (t = BLOCK_SUBBLOCKS (block); t ; t = BLOCK_CHAIN (t))
|
|
prepend_lexical_block (new_tree, remap_blocks (t, id));
|
|
/* Blocks are in arbitrary order, but make things slightly prettier and do
|
|
not swap order when producing a copy. */
|
|
BLOCK_SUBBLOCKS (new_tree) = blocks_nreverse (BLOCK_SUBBLOCKS (new_tree));
|
|
return new_tree;
|
|
}
|
|
|
|
static void
|
|
copy_statement_list (tree *tp)
|
|
{
|
|
tree_stmt_iterator oi, ni;
|
|
tree new_tree;
|
|
|
|
new_tree = alloc_stmt_list ();
|
|
ni = tsi_start (new_tree);
|
|
oi = tsi_start (*tp);
|
|
*tp = new_tree;
|
|
|
|
for (; !tsi_end_p (oi); tsi_next (&oi))
|
|
tsi_link_after (&ni, tsi_stmt (oi), TSI_NEW_STMT);
|
|
}
|
|
|
|
static void
|
|
copy_bind_expr (tree *tp, int *walk_subtrees, copy_body_data *id)
|
|
{
|
|
tree block = BIND_EXPR_BLOCK (*tp);
|
|
/* Copy (and replace) the statement. */
|
|
copy_tree_r (tp, walk_subtrees, NULL);
|
|
if (block)
|
|
{
|
|
remap_block (&block, id);
|
|
BIND_EXPR_BLOCK (*tp) = block;
|
|
}
|
|
|
|
if (BIND_EXPR_VARS (*tp))
|
|
/* This will remap a lot of the same decls again, but this should be
|
|
harmless. */
|
|
BIND_EXPR_VARS (*tp) = remap_decls (BIND_EXPR_VARS (*tp), NULL, id);
|
|
}
|
|
|
|
|
|
/* Create a new gimple_seq by remapping all the statements in BODY
|
|
using the inlining information in ID. */
|
|
|
|
gimple_seq
|
|
remap_gimple_seq (gimple_seq body, copy_body_data *id)
|
|
{
|
|
gimple_stmt_iterator si;
|
|
gimple_seq new_body = NULL;
|
|
|
|
for (si = gsi_start (body); !gsi_end_p (si); gsi_next (&si))
|
|
{
|
|
gimple new_stmt = remap_gimple_stmt (gsi_stmt (si), id);
|
|
gimple_seq_add_stmt (&new_body, new_stmt);
|
|
}
|
|
|
|
return new_body;
|
|
}
|
|
|
|
|
|
/* Copy a GIMPLE_BIND statement STMT, remapping all the symbols in its
|
|
block using the mapping information in ID. */
|
|
|
|
static gimple
|
|
copy_gimple_bind (gimple stmt, copy_body_data *id)
|
|
{
|
|
gimple new_bind;
|
|
tree new_block, new_vars;
|
|
gimple_seq body, new_body;
|
|
|
|
/* Copy the statement. Note that we purposely don't use copy_stmt
|
|
here because we need to remap statements as we copy. */
|
|
body = gimple_bind_body (stmt);
|
|
new_body = remap_gimple_seq (body, id);
|
|
|
|
new_block = gimple_bind_block (stmt);
|
|
if (new_block)
|
|
remap_block (&new_block, id);
|
|
|
|
/* This will remap a lot of the same decls again, but this should be
|
|
harmless. */
|
|
new_vars = gimple_bind_vars (stmt);
|
|
if (new_vars)
|
|
new_vars = remap_decls (new_vars, NULL, id);
|
|
|
|
new_bind = gimple_build_bind (new_vars, new_body, new_block);
|
|
|
|
return new_bind;
|
|
}
|
|
|
|
|
|
/* Remap the GIMPLE operand pointed to by *TP. DATA is really a
|
|
'struct walk_stmt_info *'. DATA->INFO is a 'copy_body_data *'.
|
|
WALK_SUBTREES is used to indicate walk_gimple_op whether to keep
|
|
recursing into the children nodes of *TP. */
|
|
|
|
static tree
|
|
remap_gimple_op_r (tree *tp, int *walk_subtrees, void *data)
|
|
{
|
|
struct walk_stmt_info *wi_p = (struct walk_stmt_info *) data;
|
|
copy_body_data *id = (copy_body_data *) wi_p->info;
|
|
tree fn = id->src_fn;
|
|
|
|
if (TREE_CODE (*tp) == SSA_NAME)
|
|
{
|
|
*tp = remap_ssa_name (*tp, id);
|
|
*walk_subtrees = 0;
|
|
return NULL;
|
|
}
|
|
else if (auto_var_in_fn_p (*tp, fn))
|
|
{
|
|
/* Local variables and labels need to be replaced by equivalent
|
|
variables. We don't want to copy static variables; there's
|
|
only one of those, no matter how many times we inline the
|
|
containing function. Similarly for globals from an outer
|
|
function. */
|
|
tree new_decl;
|
|
|
|
/* Remap the declaration. */
|
|
new_decl = remap_decl (*tp, id);
|
|
gcc_assert (new_decl);
|
|
/* Replace this variable with the copy. */
|
|
STRIP_TYPE_NOPS (new_decl);
|
|
/* ??? The C++ frontend uses void * pointer zero to initialize
|
|
any other type. This confuses the middle-end type verification.
|
|
As cloned bodies do not go through gimplification again the fixup
|
|
there doesn't trigger. */
|
|
if (TREE_CODE (new_decl) == INTEGER_CST
|
|
&& !useless_type_conversion_p (TREE_TYPE (*tp), TREE_TYPE (new_decl)))
|
|
new_decl = fold_convert (TREE_TYPE (*tp), new_decl);
|
|
*tp = new_decl;
|
|
*walk_subtrees = 0;
|
|
}
|
|
else if (TREE_CODE (*tp) == STATEMENT_LIST)
|
|
gcc_unreachable ();
|
|
else if (TREE_CODE (*tp) == SAVE_EXPR)
|
|
gcc_unreachable ();
|
|
else if (TREE_CODE (*tp) == LABEL_DECL
|
|
&& (!DECL_CONTEXT (*tp)
|
|
|| decl_function_context (*tp) == id->src_fn))
|
|
/* These may need to be remapped for EH handling. */
|
|
*tp = remap_decl (*tp, id);
|
|
else if (TYPE_P (*tp))
|
|
/* Types may need remapping as well. */
|
|
*tp = remap_type (*tp, id);
|
|
else if (CONSTANT_CLASS_P (*tp))
|
|
{
|
|
/* If this is a constant, we have to copy the node iff the type
|
|
will be remapped. copy_tree_r will not copy a constant. */
|
|
tree new_type = remap_type (TREE_TYPE (*tp), id);
|
|
|
|
if (new_type == TREE_TYPE (*tp))
|
|
*walk_subtrees = 0;
|
|
|
|
else if (TREE_CODE (*tp) == INTEGER_CST)
|
|
*tp = build_int_cst_wide (new_type, TREE_INT_CST_LOW (*tp),
|
|
TREE_INT_CST_HIGH (*tp));
|
|
else
|
|
{
|
|
*tp = copy_node (*tp);
|
|
TREE_TYPE (*tp) = new_type;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* Otherwise, just copy the node. Note that copy_tree_r already
|
|
knows not to copy VAR_DECLs, etc., so this is safe. */
|
|
if (TREE_CODE (*tp) == INDIRECT_REF)
|
|
{
|
|
/* Get rid of *& from inline substitutions that can happen when a
|
|
pointer argument is an ADDR_EXPR. */
|
|
tree decl = TREE_OPERAND (*tp, 0);
|
|
tree *n;
|
|
|
|
n = (tree *) pointer_map_contains (id->decl_map, decl);
|
|
if (n)
|
|
{
|
|
tree type, new_tree, old;
|
|
|
|
/* If we happen to get an ADDR_EXPR in n->value, strip
|
|
it manually here as we'll eventually get ADDR_EXPRs
|
|
which lie about their types pointed to. In this case
|
|
build_fold_indirect_ref wouldn't strip the
|
|
INDIRECT_REF, but we absolutely rely on that. As
|
|
fold_indirect_ref does other useful transformations,
|
|
try that first, though. */
|
|
type = TREE_TYPE (TREE_TYPE (*n));
|
|
new_tree = unshare_expr (*n);
|
|
old = *tp;
|
|
*tp = gimple_fold_indirect_ref (new_tree);
|
|
if (!*tp)
|
|
{
|
|
if (TREE_CODE (new_tree) == ADDR_EXPR)
|
|
{
|
|
*tp = fold_indirect_ref_1 (type, new_tree);
|
|
/* ??? We should either assert here or build
|
|
a VIEW_CONVERT_EXPR instead of blindly leaking
|
|
incompatible types to our IL. */
|
|
if (! *tp)
|
|
*tp = TREE_OPERAND (new_tree, 0);
|
|
}
|
|
else
|
|
{
|
|
*tp = build1 (INDIRECT_REF, type, new_tree);
|
|
TREE_THIS_VOLATILE (*tp) = TREE_THIS_VOLATILE (old);
|
|
TREE_NO_WARNING (*tp) = TREE_NO_WARNING (old);
|
|
}
|
|
}
|
|
*walk_subtrees = 0;
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
/* Here is the "usual case". Copy this tree node, and then
|
|
tweak some special cases. */
|
|
copy_tree_r (tp, walk_subtrees, NULL);
|
|
|
|
/* Global variables we haven't seen yet need to go into referenced
|
|
vars. If not referenced from types only. */
|
|
if (gimple_in_ssa_p (cfun)
|
|
&& TREE_CODE (*tp) == VAR_DECL
|
|
&& id->remapping_type_depth == 0)
|
|
add_referenced_var (*tp);
|
|
|
|
/* We should never have TREE_BLOCK set on non-statements. */
|
|
if (EXPR_P (*tp))
|
|
gcc_assert (!TREE_BLOCK (*tp));
|
|
|
|
if (TREE_CODE (*tp) != OMP_CLAUSE)
|
|
TREE_TYPE (*tp) = remap_type (TREE_TYPE (*tp), id);
|
|
|
|
if (TREE_CODE (*tp) == TARGET_EXPR && TREE_OPERAND (*tp, 3))
|
|
{
|
|
/* The copied TARGET_EXPR has never been expanded, even if the
|
|
original node was expanded already. */
|
|
TREE_OPERAND (*tp, 1) = TREE_OPERAND (*tp, 3);
|
|
TREE_OPERAND (*tp, 3) = NULL_TREE;
|
|
}
|
|
else if (TREE_CODE (*tp) == ADDR_EXPR)
|
|
{
|
|
/* Variable substitution need not be simple. In particular,
|
|
the INDIRECT_REF substitution above. Make sure that
|
|
TREE_CONSTANT and friends are up-to-date. But make sure
|
|
to not improperly set TREE_BLOCK on some sub-expressions. */
|
|
int invariant = is_gimple_min_invariant (*tp);
|
|
tree block = id->block;
|
|
id->block = NULL_TREE;
|
|
walk_tree (&TREE_OPERAND (*tp, 0), copy_tree_body_r, id, NULL);
|
|
id->block = block;
|
|
|
|
/* Handle the case where we substituted an INDIRECT_REF
|
|
into the operand of the ADDR_EXPR. */
|
|
if (TREE_CODE (TREE_OPERAND (*tp, 0)) == INDIRECT_REF)
|
|
*tp = TREE_OPERAND (TREE_OPERAND (*tp, 0), 0);
|
|
else
|
|
recompute_tree_invariant_for_addr_expr (*tp);
|
|
|
|
/* If this used to be invariant, but is not any longer,
|
|
then regimplification is probably needed. */
|
|
if (invariant && !is_gimple_min_invariant (*tp))
|
|
id->regimplify = true;
|
|
|
|
*walk_subtrees = 0;
|
|
}
|
|
}
|
|
|
|
/* Keep iterating. */
|
|
return NULL_TREE;
|
|
}
|
|
|
|
|
|
/* Called from copy_body_id via walk_tree. DATA is really a
|
|
`copy_body_data *'. */
|
|
|
|
tree
|
|
copy_tree_body_r (tree *tp, int *walk_subtrees, void *data)
|
|
{
|
|
copy_body_data *id = (copy_body_data *) data;
|
|
tree fn = id->src_fn;
|
|
tree new_block;
|
|
|
|
/* Begin by recognizing trees that we'll completely rewrite for the
|
|
inlining context. Our output for these trees is completely
|
|
different from out input (e.g. RETURN_EXPR is deleted, and morphs
|
|
into an edge). Further down, we'll handle trees that get
|
|
duplicated and/or tweaked. */
|
|
|
|
/* When requested, RETURN_EXPRs should be transformed to just the
|
|
contained MODIFY_EXPR. The branch semantics of the return will
|
|
be handled elsewhere by manipulating the CFG rather than a statement. */
|
|
if (TREE_CODE (*tp) == RETURN_EXPR && id->transform_return_to_modify)
|
|
{
|
|
tree assignment = TREE_OPERAND (*tp, 0);
|
|
|
|
/* If we're returning something, just turn that into an
|
|
assignment into the equivalent of the original RESULT_DECL.
|
|
If the "assignment" is just the result decl, the result
|
|
decl has already been set (e.g. a recent "foo (&result_decl,
|
|
...)"); just toss the entire RETURN_EXPR. */
|
|
if (assignment && TREE_CODE (assignment) == MODIFY_EXPR)
|
|
{
|
|
/* Replace the RETURN_EXPR with (a copy of) the
|
|
MODIFY_EXPR hanging underneath. */
|
|
*tp = copy_node (assignment);
|
|
}
|
|
else /* Else the RETURN_EXPR returns no value. */
|
|
{
|
|
*tp = NULL;
|
|
return (tree) (void *)1;
|
|
}
|
|
}
|
|
else if (TREE_CODE (*tp) == SSA_NAME)
|
|
{
|
|
*tp = remap_ssa_name (*tp, id);
|
|
*walk_subtrees = 0;
|
|
return NULL;
|
|
}
|
|
|
|
/* Local variables and labels need to be replaced by equivalent
|
|
variables. We don't want to copy static variables; there's only
|
|
one of those, no matter how many times we inline the containing
|
|
function. Similarly for globals from an outer function. */
|
|
else if (auto_var_in_fn_p (*tp, fn))
|
|
{
|
|
tree new_decl;
|
|
|
|
/* Remap the declaration. */
|
|
new_decl = remap_decl (*tp, id);
|
|
gcc_assert (new_decl);
|
|
/* Replace this variable with the copy. */
|
|
STRIP_TYPE_NOPS (new_decl);
|
|
*tp = new_decl;
|
|
*walk_subtrees = 0;
|
|
}
|
|
else if (TREE_CODE (*tp) == STATEMENT_LIST)
|
|
copy_statement_list (tp);
|
|
else if (TREE_CODE (*tp) == SAVE_EXPR)
|
|
remap_save_expr (tp, id->decl_map, walk_subtrees);
|
|
else if (TREE_CODE (*tp) == LABEL_DECL
|
|
&& (! DECL_CONTEXT (*tp)
|
|
|| decl_function_context (*tp) == id->src_fn))
|
|
/* These may need to be remapped for EH handling. */
|
|
*tp = remap_decl (*tp, id);
|
|
else if (TREE_CODE (*tp) == BIND_EXPR)
|
|
copy_bind_expr (tp, walk_subtrees, id);
|
|
/* Types may need remapping as well. */
|
|
else if (TYPE_P (*tp))
|
|
*tp = remap_type (*tp, id);
|
|
|
|
/* If this is a constant, we have to copy the node iff the type will be
|
|
remapped. copy_tree_r will not copy a constant. */
|
|
else if (CONSTANT_CLASS_P (*tp))
|
|
{
|
|
tree new_type = remap_type (TREE_TYPE (*tp), id);
|
|
|
|
if (new_type == TREE_TYPE (*tp))
|
|
*walk_subtrees = 0;
|
|
|
|
else if (TREE_CODE (*tp) == INTEGER_CST)
|
|
*tp = build_int_cst_wide (new_type, TREE_INT_CST_LOW (*tp),
|
|
TREE_INT_CST_HIGH (*tp));
|
|
else
|
|
{
|
|
*tp = copy_node (*tp);
|
|
TREE_TYPE (*tp) = new_type;
|
|
}
|
|
}
|
|
|
|
/* Otherwise, just copy the node. Note that copy_tree_r already
|
|
knows not to copy VAR_DECLs, etc., so this is safe. */
|
|
else
|
|
{
|
|
/* Here we handle trees that are not completely rewritten.
|
|
First we detect some inlining-induced bogosities for
|
|
discarding. */
|
|
if (TREE_CODE (*tp) == MODIFY_EXPR
|
|
&& TREE_OPERAND (*tp, 0) == TREE_OPERAND (*tp, 1)
|
|
&& (auto_var_in_fn_p (TREE_OPERAND (*tp, 0), fn)))
|
|
{
|
|
/* Some assignments VAR = VAR; don't generate any rtl code
|
|
and thus don't count as variable modification. Avoid
|
|
keeping bogosities like 0 = 0. */
|
|
tree decl = TREE_OPERAND (*tp, 0), value;
|
|
tree *n;
|
|
|
|
n = (tree *) pointer_map_contains (id->decl_map, decl);
|
|
if (n)
|
|
{
|
|
value = *n;
|
|
STRIP_TYPE_NOPS (value);
|
|
if (TREE_CONSTANT (value) || TREE_READONLY (value))
|
|
{
|
|
*tp = build_empty_stmt ();
|
|
return copy_tree_body_r (tp, walk_subtrees, data);
|
|
}
|
|
}
|
|
}
|
|
else if (TREE_CODE (*tp) == INDIRECT_REF)
|
|
{
|
|
/* Get rid of *& from inline substitutions that can happen when a
|
|
pointer argument is an ADDR_EXPR. */
|
|
tree decl = TREE_OPERAND (*tp, 0);
|
|
tree *n;
|
|
|
|
n = (tree *) pointer_map_contains (id->decl_map, decl);
|
|
if (n)
|
|
{
|
|
tree new_tree;
|
|
tree old;
|
|
/* If we happen to get an ADDR_EXPR in n->value, strip
|
|
it manually here as we'll eventually get ADDR_EXPRs
|
|
which lie about their types pointed to. In this case
|
|
build_fold_indirect_ref wouldn't strip the INDIRECT_REF,
|
|
but we absolutely rely on that. As fold_indirect_ref
|
|
does other useful transformations, try that first, though. */
|
|
tree type = TREE_TYPE (TREE_TYPE (*n));
|
|
new_tree = unshare_expr (*n);
|
|
old = *tp;
|
|
*tp = gimple_fold_indirect_ref (new_tree);
|
|
if (! *tp)
|
|
{
|
|
if (TREE_CODE (new_tree) == ADDR_EXPR)
|
|
{
|
|
*tp = fold_indirect_ref_1 (type, new_tree);
|
|
/* ??? We should either assert here or build
|
|
a VIEW_CONVERT_EXPR instead of blindly leaking
|
|
incompatible types to our IL. */
|
|
if (! *tp)
|
|
*tp = TREE_OPERAND (new_tree, 0);
|
|
}
|
|
else
|
|
{
|
|
*tp = build1 (INDIRECT_REF, type, new_tree);
|
|
TREE_THIS_VOLATILE (*tp) = TREE_THIS_VOLATILE (old);
|
|
TREE_SIDE_EFFECTS (*tp) = TREE_SIDE_EFFECTS (old);
|
|
}
|
|
}
|
|
*walk_subtrees = 0;
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
/* Here is the "usual case". Copy this tree node, and then
|
|
tweak some special cases. */
|
|
copy_tree_r (tp, walk_subtrees, NULL);
|
|
|
|
/* Global variables we haven't seen yet needs to go into referenced
|
|
vars. If not referenced from types only. */
|
|
if (gimple_in_ssa_p (cfun)
|
|
&& TREE_CODE (*tp) == VAR_DECL
|
|
&& id->remapping_type_depth == 0)
|
|
add_referenced_var (*tp);
|
|
|
|
/* If EXPR has block defined, map it to newly constructed block.
|
|
When inlining we want EXPRs without block appear in the block
|
|
of function call. */
|
|
if (EXPR_P (*tp))
|
|
{
|
|
new_block = id->block;
|
|
if (TREE_BLOCK (*tp))
|
|
{
|
|
tree *n;
|
|
n = (tree *) pointer_map_contains (id->decl_map,
|
|
TREE_BLOCK (*tp));
|
|
gcc_assert (n);
|
|
new_block = *n;
|
|
}
|
|
TREE_BLOCK (*tp) = new_block;
|
|
}
|
|
|
|
if (TREE_CODE (*tp) == RESX_EXPR && id->eh_region_offset)
|
|
TREE_OPERAND (*tp, 0) =
|
|
build_int_cst (NULL_TREE,
|
|
id->eh_region_offset
|
|
+ TREE_INT_CST_LOW (TREE_OPERAND (*tp, 0)));
|
|
|
|
if (TREE_CODE (*tp) != OMP_CLAUSE)
|
|
TREE_TYPE (*tp) = remap_type (TREE_TYPE (*tp), id);
|
|
|
|
/* The copied TARGET_EXPR has never been expanded, even if the
|
|
original node was expanded already. */
|
|
if (TREE_CODE (*tp) == TARGET_EXPR && TREE_OPERAND (*tp, 3))
|
|
{
|
|
TREE_OPERAND (*tp, 1) = TREE_OPERAND (*tp, 3);
|
|
TREE_OPERAND (*tp, 3) = NULL_TREE;
|
|
}
|
|
|
|
/* Variable substitution need not be simple. In particular, the
|
|
INDIRECT_REF substitution above. Make sure that TREE_CONSTANT
|
|
and friends are up-to-date. */
|
|
else if (TREE_CODE (*tp) == ADDR_EXPR)
|
|
{
|
|
int invariant = is_gimple_min_invariant (*tp);
|
|
walk_tree (&TREE_OPERAND (*tp, 0), copy_tree_body_r, id, NULL);
|
|
|
|
/* Handle the case where we substituted an INDIRECT_REF
|
|
into the operand of the ADDR_EXPR. */
|
|
if (TREE_CODE (TREE_OPERAND (*tp, 0)) == INDIRECT_REF)
|
|
*tp = TREE_OPERAND (TREE_OPERAND (*tp, 0), 0);
|
|
else
|
|
recompute_tree_invariant_for_addr_expr (*tp);
|
|
|
|
/* If this used to be invariant, but is not any longer,
|
|
then regimplification is probably needed. */
|
|
if (invariant && !is_gimple_min_invariant (*tp))
|
|
id->regimplify = true;
|
|
|
|
*walk_subtrees = 0;
|
|
}
|
|
}
|
|
|
|
/* Keep iterating. */
|
|
return NULL_TREE;
|
|
}
|
|
|
|
|
|
/* Helper for copy_bb. Remap statement STMT using the inlining
|
|
information in ID. Return the new statement copy. */
|
|
|
|
static gimple
|
|
remap_gimple_stmt (gimple stmt, copy_body_data *id)
|
|
{
|
|
gimple copy = NULL;
|
|
struct walk_stmt_info wi;
|
|
tree new_block;
|
|
bool skip_first = false;
|
|
|
|
/* Begin by recognizing trees that we'll completely rewrite for the
|
|
inlining context. Our output for these trees is completely
|
|
different from out input (e.g. RETURN_EXPR is deleted, and morphs
|
|
into an edge). Further down, we'll handle trees that get
|
|
duplicated and/or tweaked. */
|
|
|
|
/* When requested, GIMPLE_RETURNs should be transformed to just the
|
|
contained GIMPLE_ASSIGN. The branch semantics of the return will
|
|
be handled elsewhere by manipulating the CFG rather than the
|
|
statement. */
|
|
if (gimple_code (stmt) == GIMPLE_RETURN && id->transform_return_to_modify)
|
|
{
|
|
tree retval = gimple_return_retval (stmt);
|
|
|
|
/* If we're returning something, just turn that into an
|
|
assignment into the equivalent of the original RESULT_DECL.
|
|
If RETVAL is just the result decl, the result decl has
|
|
already been set (e.g. a recent "foo (&result_decl, ...)");
|
|
just toss the entire GIMPLE_RETURN. */
|
|
if (retval && TREE_CODE (retval) != RESULT_DECL)
|
|
{
|
|
copy = gimple_build_assign (id->retvar, retval);
|
|
/* id->retvar is already substituted. Skip it on later remapping. */
|
|
skip_first = true;
|
|
}
|
|
else
|
|
return gimple_build_nop ();
|
|
}
|
|
else if (gimple_has_substatements (stmt))
|
|
{
|
|
gimple_seq s1, s2;
|
|
|
|
/* When cloning bodies from the C++ front end, we will be handed bodies
|
|
in High GIMPLE form. Handle here all the High GIMPLE statements that
|
|
have embedded statements. */
|
|
switch (gimple_code (stmt))
|
|
{
|
|
case GIMPLE_BIND:
|
|
copy = copy_gimple_bind (stmt, id);
|
|
break;
|
|
|
|
case GIMPLE_CATCH:
|
|
s1 = remap_gimple_seq (gimple_catch_handler (stmt), id);
|
|
copy = gimple_build_catch (gimple_catch_types (stmt), s1);
|
|
break;
|
|
|
|
case GIMPLE_EH_FILTER:
|
|
s1 = remap_gimple_seq (gimple_eh_filter_failure (stmt), id);
|
|
copy = gimple_build_eh_filter (gimple_eh_filter_types (stmt), s1);
|
|
break;
|
|
|
|
case GIMPLE_TRY:
|
|
s1 = remap_gimple_seq (gimple_try_eval (stmt), id);
|
|
s2 = remap_gimple_seq (gimple_try_cleanup (stmt), id);
|
|
copy = gimple_build_try (s1, s2, gimple_try_kind (stmt));
|
|
break;
|
|
|
|
case GIMPLE_WITH_CLEANUP_EXPR:
|
|
s1 = remap_gimple_seq (gimple_wce_cleanup (stmt), id);
|
|
copy = gimple_build_wce (s1);
|
|
break;
|
|
|
|
case GIMPLE_OMP_PARALLEL:
|
|
s1 = remap_gimple_seq (gimple_omp_body (stmt), id);
|
|
copy = gimple_build_omp_parallel
|
|
(s1,
|
|
gimple_omp_parallel_clauses (stmt),
|
|
gimple_omp_parallel_child_fn (stmt),
|
|
gimple_omp_parallel_data_arg (stmt));
|
|
break;
|
|
|
|
case GIMPLE_OMP_TASK:
|
|
s1 = remap_gimple_seq (gimple_omp_body (stmt), id);
|
|
copy = gimple_build_omp_task
|
|
(s1,
|
|
gimple_omp_task_clauses (stmt),
|
|
gimple_omp_task_child_fn (stmt),
|
|
gimple_omp_task_data_arg (stmt),
|
|
gimple_omp_task_copy_fn (stmt),
|
|
gimple_omp_task_arg_size (stmt),
|
|
gimple_omp_task_arg_align (stmt));
|
|
break;
|
|
|
|
case GIMPLE_OMP_FOR:
|
|
s1 = remap_gimple_seq (gimple_omp_body (stmt), id);
|
|
s2 = remap_gimple_seq (gimple_omp_for_pre_body (stmt), id);
|
|
copy = gimple_build_omp_for (s1, gimple_omp_for_clauses (stmt),
|
|
gimple_omp_for_collapse (stmt), s2);
|
|
{
|
|
size_t i;
|
|
for (i = 0; i < gimple_omp_for_collapse (stmt); i++)
|
|
{
|
|
gimple_omp_for_set_index (copy, i,
|
|
gimple_omp_for_index (stmt, i));
|
|
gimple_omp_for_set_initial (copy, i,
|
|
gimple_omp_for_initial (stmt, i));
|
|
gimple_omp_for_set_final (copy, i,
|
|
gimple_omp_for_final (stmt, i));
|
|
gimple_omp_for_set_incr (copy, i,
|
|
gimple_omp_for_incr (stmt, i));
|
|
gimple_omp_for_set_cond (copy, i,
|
|
gimple_omp_for_cond (stmt, i));
|
|
}
|
|
}
|
|
break;
|
|
|
|
case GIMPLE_OMP_MASTER:
|
|
s1 = remap_gimple_seq (gimple_omp_body (stmt), id);
|
|
copy = gimple_build_omp_master (s1);
|
|
break;
|
|
|
|
case GIMPLE_OMP_ORDERED:
|
|
s1 = remap_gimple_seq (gimple_omp_body (stmt), id);
|
|
copy = gimple_build_omp_ordered (s1);
|
|
break;
|
|
|
|
case GIMPLE_OMP_SECTION:
|
|
s1 = remap_gimple_seq (gimple_omp_body (stmt), id);
|
|
copy = gimple_build_omp_section (s1);
|
|
break;
|
|
|
|
case GIMPLE_OMP_SECTIONS:
|
|
s1 = remap_gimple_seq (gimple_omp_body (stmt), id);
|
|
copy = gimple_build_omp_sections
|
|
(s1, gimple_omp_sections_clauses (stmt));
|
|
break;
|
|
|
|
case GIMPLE_OMP_SINGLE:
|
|
s1 = remap_gimple_seq (gimple_omp_body (stmt), id);
|
|
copy = gimple_build_omp_single
|
|
(s1, gimple_omp_single_clauses (stmt));
|
|
break;
|
|
|
|
case GIMPLE_OMP_CRITICAL:
|
|
s1 = remap_gimple_seq (gimple_omp_body (stmt), id);
|
|
copy
|
|
= gimple_build_omp_critical (s1, gimple_omp_critical_name (stmt));
|
|
break;
|
|
|
|
default:
|
|
gcc_unreachable ();
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (gimple_assign_copy_p (stmt)
|
|
&& gimple_assign_lhs (stmt) == gimple_assign_rhs1 (stmt)
|
|
&& auto_var_in_fn_p (gimple_assign_lhs (stmt), id->src_fn))
|
|
{
|
|
/* Here we handle statements that are not completely rewritten.
|
|
First we detect some inlining-induced bogosities for
|
|
discarding. */
|
|
|
|
/* Some assignments VAR = VAR; don't generate any rtl code
|
|
and thus don't count as variable modification. Avoid
|
|
keeping bogosities like 0 = 0. */
|
|
tree decl = gimple_assign_lhs (stmt), value;
|
|
tree *n;
|
|
|
|
n = (tree *) pointer_map_contains (id->decl_map, decl);
|
|
if (n)
|
|
{
|
|
value = *n;
|
|
STRIP_TYPE_NOPS (value);
|
|
if (TREE_CONSTANT (value) || TREE_READONLY (value))
|
|
return gimple_build_nop ();
|
|
}
|
|
}
|
|
|
|
/* Create a new deep copy of the statement. */
|
|
copy = gimple_copy (stmt);
|
|
}
|
|
|
|
/* If STMT has a block defined, map it to the newly constructed
|
|
block. When inlining we want statements without a block to
|
|
appear in the block of the function call. */
|
|
new_block = id->block;
|
|
if (gimple_block (copy))
|
|
{
|
|
tree *n;
|
|
n = (tree *) pointer_map_contains (id->decl_map, gimple_block (copy));
|
|
gcc_assert (n);
|
|
new_block = *n;
|
|
}
|
|
|
|
gimple_set_block (copy, new_block);
|
|
|
|
/* Remap all the operands in COPY. */
|
|
memset (&wi, 0, sizeof (wi));
|
|
wi.info = id;
|
|
if (skip_first)
|
|
walk_tree (gimple_op_ptr (copy, 1), remap_gimple_op_r, &wi, NULL);
|
|
else
|
|
walk_gimple_op (copy, remap_gimple_op_r, &wi);
|
|
|
|
/* Clear the copied virtual operands. We are not remapping them here
|
|
but are going to recreate them from scratch. */
|
|
if (gimple_has_mem_ops (copy))
|
|
{
|
|
gimple_set_vdef (copy, NULL_TREE);
|
|
gimple_set_vuse (copy, NULL_TREE);
|
|
}
|
|
|
|
/* We have to handle EH region remapping of GIMPLE_RESX specially because
|
|
the region number is not an operand. */
|
|
if (gimple_code (stmt) == GIMPLE_RESX && id->eh_region_offset)
|
|
{
|
|
gimple_resx_set_region (copy, gimple_resx_region (stmt) + id->eh_region_offset);
|
|
}
|
|
return copy;
|
|
}
|
|
|
|
|
|
/* Copy basic block, scale profile accordingly. Edges will be taken care of
|
|
later */
|
|
|
|
static basic_block
|
|
copy_bb (copy_body_data *id, basic_block bb, int frequency_scale,
|
|
gcov_type count_scale)
|
|
{
|
|
gimple_stmt_iterator gsi, copy_gsi, seq_gsi;
|
|
basic_block copy_basic_block;
|
|
tree decl;
|
|
|
|
/* create_basic_block() will append every new block to
|
|
basic_block_info automatically. */
|
|
copy_basic_block = create_basic_block (NULL, (void *) 0,
|
|
(basic_block) bb->prev_bb->aux);
|
|
copy_basic_block->count = bb->count * count_scale / REG_BR_PROB_BASE;
|
|
|
|
/* We are going to rebuild frequencies from scratch. These values
|
|
have just small importance to drive canonicalize_loop_headers. */
|
|
copy_basic_block->frequency = ((gcov_type)bb->frequency
|
|
* frequency_scale / REG_BR_PROB_BASE);
|
|
|
|
if (copy_basic_block->frequency > BB_FREQ_MAX)
|
|
copy_basic_block->frequency = BB_FREQ_MAX;
|
|
|
|
copy_gsi = gsi_start_bb (copy_basic_block);
|
|
|
|
for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi))
|
|
{
|
|
gimple stmt = gsi_stmt (gsi);
|
|
gimple orig_stmt = stmt;
|
|
|
|
id->regimplify = false;
|
|
stmt = remap_gimple_stmt (stmt, id);
|
|
if (gimple_nop_p (stmt))
|
|
continue;
|
|
|
|
gimple_duplicate_stmt_histograms (cfun, stmt, id->src_cfun, orig_stmt);
|
|
seq_gsi = copy_gsi;
|
|
|
|
/* With return slot optimization we can end up with
|
|
non-gimple (foo *)&this->m, fix that here. */
|
|
if (is_gimple_assign (stmt)
|
|
&& gimple_assign_rhs_code (stmt) == NOP_EXPR
|
|
&& !is_gimple_val (gimple_assign_rhs1 (stmt)))
|
|
{
|
|
tree new_rhs;
|
|
new_rhs = force_gimple_operand_gsi (&seq_gsi,
|
|
gimple_assign_rhs1 (stmt),
|
|
true, NULL, true, GSI_SAME_STMT);
|
|
gimple_assign_set_rhs1 (stmt, new_rhs);
|
|
id->regimplify = false;
|
|
}
|
|
|
|
gsi_insert_after (&seq_gsi, stmt, GSI_NEW_STMT);
|
|
|
|
if (id->regimplify)
|
|
gimple_regimplify_operands (stmt, &seq_gsi);
|
|
|
|
/* If copy_basic_block has been empty at the start of this iteration,
|
|
call gsi_start_bb again to get at the newly added statements. */
|
|
if (gsi_end_p (copy_gsi))
|
|
copy_gsi = gsi_start_bb (copy_basic_block);
|
|
else
|
|
gsi_next (©_gsi);
|
|
|
|
/* Process the new statement. The call to gimple_regimplify_operands
|
|
possibly turned the statement into multiple statements, we
|
|
need to process all of them. */
|
|
do
|
|
{
|
|
stmt = gsi_stmt (copy_gsi);
|
|
if (is_gimple_call (stmt)
|
|
&& gimple_call_va_arg_pack_p (stmt)
|
|
&& id->gimple_call)
|
|
{
|
|
/* __builtin_va_arg_pack () should be replaced by
|
|
all arguments corresponding to ... in the caller. */
|
|
tree p;
|
|
gimple new_call;
|
|
VEC(tree, heap) *argarray;
|
|
size_t nargs = gimple_call_num_args (id->gimple_call);
|
|
size_t n;
|
|
|
|
for (p = DECL_ARGUMENTS (id->src_fn); p; p = TREE_CHAIN (p))
|
|
nargs--;
|
|
|
|
/* Create the new array of arguments. */
|
|
n = nargs + gimple_call_num_args (stmt);
|
|
argarray = VEC_alloc (tree, heap, n);
|
|
VEC_safe_grow (tree, heap, argarray, n);
|
|
|
|
/* Copy all the arguments before '...' */
|
|
memcpy (VEC_address (tree, argarray),
|
|
gimple_call_arg_ptr (stmt, 0),
|
|
gimple_call_num_args (stmt) * sizeof (tree));
|
|
|
|
/* Append the arguments passed in '...' */
|
|
memcpy (VEC_address(tree, argarray) + gimple_call_num_args (stmt),
|
|
gimple_call_arg_ptr (id->gimple_call, 0)
|
|
+ (gimple_call_num_args (id->gimple_call) - nargs),
|
|
nargs * sizeof (tree));
|
|
|
|
new_call = gimple_build_call_vec (gimple_call_fn (stmt),
|
|
argarray);
|
|
|
|
VEC_free (tree, heap, argarray);
|
|
|
|
/* Copy all GIMPLE_CALL flags, location and block, except
|
|
GF_CALL_VA_ARG_PACK. */
|
|
gimple_call_copy_flags (new_call, stmt);
|
|
gimple_call_set_va_arg_pack (new_call, false);
|
|
gimple_set_location (new_call, gimple_location (stmt));
|
|
gimple_set_block (new_call, gimple_block (stmt));
|
|
gimple_call_set_lhs (new_call, gimple_call_lhs (stmt));
|
|
|
|
gsi_replace (©_gsi, new_call, false);
|
|
gimple_set_bb (stmt, NULL);
|
|
stmt = new_call;
|
|
}
|
|
else if (is_gimple_call (stmt)
|
|
&& id->gimple_call
|
|
&& (decl = gimple_call_fndecl (stmt))
|
|
&& DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL
|
|
&& DECL_FUNCTION_CODE (decl) == BUILT_IN_VA_ARG_PACK_LEN)
|
|
{
|
|
/* __builtin_va_arg_pack_len () should be replaced by
|
|
the number of anonymous arguments. */
|
|
size_t nargs = gimple_call_num_args (id->gimple_call);
|
|
tree count, p;
|
|
gimple new_stmt;
|
|
|
|
for (p = DECL_ARGUMENTS (id->src_fn); p; p = TREE_CHAIN (p))
|
|
nargs--;
|
|
|
|
count = build_int_cst (integer_type_node, nargs);
|
|
new_stmt = gimple_build_assign (gimple_call_lhs (stmt), count);
|
|
gsi_replace (©_gsi, new_stmt, false);
|
|
stmt = new_stmt;
|
|
}
|
|
|
|
/* Statements produced by inlining can be unfolded, especially
|
|
when we constant propagated some operands. We can't fold
|
|
them right now for two reasons:
|
|
1) folding require SSA_NAME_DEF_STMTs to be correct
|
|
2) we can't change function calls to builtins.
|
|
So we just mark statement for later folding. We mark
|
|
all new statements, instead just statements that has changed
|
|
by some nontrivial substitution so even statements made
|
|
foldable indirectly are updated. If this turns out to be
|
|
expensive, copy_body can be told to watch for nontrivial
|
|
changes. */
|
|
if (id->statements_to_fold)
|
|
pointer_set_insert (id->statements_to_fold, stmt);
|
|
|
|
/* We're duplicating a CALL_EXPR. Find any corresponding
|
|
callgraph edges and update or duplicate them. */
|
|
if (is_gimple_call (stmt))
|
|
{
|
|
struct cgraph_node *node;
|
|
struct cgraph_edge *edge;
|
|
int flags;
|
|
|
|
switch (id->transform_call_graph_edges)
|
|
{
|
|
case CB_CGE_DUPLICATE:
|
|
edge = cgraph_edge (id->src_node, orig_stmt);
|
|
if (edge)
|
|
cgraph_clone_edge (edge, id->dst_node, stmt,
|
|
REG_BR_PROB_BASE, 1,
|
|
edge->frequency, true);
|
|
break;
|
|
|
|
case CB_CGE_MOVE_CLONES:
|
|
for (node = id->dst_node->next_clone;
|
|
node;
|
|
node = node->next_clone)
|
|
{
|
|
edge = cgraph_edge (node, orig_stmt);
|
|
if (edge)
|
|
cgraph_set_call_stmt (edge, stmt);
|
|
}
|
|
/* FALLTHRU */
|
|
|
|
case CB_CGE_MOVE:
|
|
edge = cgraph_edge (id->dst_node, orig_stmt);
|
|
if (edge)
|
|
cgraph_set_call_stmt (edge, stmt);
|
|
break;
|
|
|
|
default:
|
|
gcc_unreachable ();
|
|
}
|
|
|
|
flags = gimple_call_flags (stmt);
|
|
|
|
if (flags & ECF_MAY_BE_ALLOCA)
|
|
cfun->calls_alloca = true;
|
|
if (flags & ECF_RETURNS_TWICE)
|
|
cfun->calls_setjmp = true;
|
|
}
|
|
|
|
/* If you think we can abort here, you are wrong.
|
|
There is no region 0 in gimple. */
|
|
gcc_assert (lookup_stmt_eh_region_fn (id->src_cfun, orig_stmt) != 0);
|
|
|
|
if (stmt_could_throw_p (stmt)
|
|
/* When we are cloning for inlining, we are supposed to
|
|
construct a clone that calls precisely the same functions
|
|
as original. However IPA optimizers might've proved
|
|
earlier some function calls as non-trapping that might
|
|
render some basic blocks dead that might become
|
|
unreachable.
|
|
|
|
We can't update SSA with unreachable blocks in CFG and thus
|
|
we prevent the scenario by preserving even the "dead" eh
|
|
edges until the point they are later removed by
|
|
fixup_cfg pass. */
|
|
|| (id->transform_call_graph_edges == CB_CGE_MOVE_CLONES
|
|
&& lookup_stmt_eh_region_fn (id->src_cfun, orig_stmt) > 0))
|
|
{
|
|
int region = lookup_stmt_eh_region_fn (id->src_cfun, orig_stmt);
|
|
|
|
/* Add an entry for the copied tree in the EH hashtable.
|
|
When cloning or versioning, use the hashtable in
|
|
cfun, and just copy the EH number. When inlining, use the
|
|
hashtable in the caller, and adjust the region number. */
|
|
if (region > 0)
|
|
add_stmt_to_eh_region (stmt, region + id->eh_region_offset);
|
|
|
|
/* If this tree doesn't have a region associated with it,
|
|
and there is a "current region,"
|
|
then associate this tree with the current region
|
|
and add edges associated with this region. */
|
|
if (lookup_stmt_eh_region_fn (id->src_cfun, orig_stmt) <= 0
|
|
&& id->eh_region > 0
|
|
&& stmt_could_throw_p (stmt))
|
|
add_stmt_to_eh_region (stmt, id->eh_region);
|
|
}
|
|
|
|
if (gimple_in_ssa_p (cfun))
|
|
{
|
|
ssa_op_iter i;
|
|
tree def;
|
|
|
|
find_new_referenced_vars (gsi_stmt (copy_gsi));
|
|
FOR_EACH_SSA_TREE_OPERAND (def, stmt, i, SSA_OP_DEF)
|
|
if (TREE_CODE (def) == SSA_NAME)
|
|
SSA_NAME_DEF_STMT (def) = stmt;
|
|
}
|
|
|
|
gsi_next (©_gsi);
|
|
}
|
|
while (!gsi_end_p (copy_gsi));
|
|
|
|
copy_gsi = gsi_last_bb (copy_basic_block);
|
|
}
|
|
|
|
return copy_basic_block;
|
|
}
|
|
|
|
/* Inserting Single Entry Multiple Exit region in SSA form into code in SSA
|
|
form is quite easy, since dominator relationship for old basic blocks does
|
|
not change.
|
|
|
|
There is however exception where inlining might change dominator relation
|
|
across EH edges from basic block within inlined functions destinating
|
|
to landing pads in function we inline into.
|
|
|
|
The function fills in PHI_RESULTs of such PHI nodes if they refer
|
|
to gimple regs. Otherwise, the function mark PHI_RESULT of such
|
|
PHI nodes for renaming. For non-gimple regs, renaming is safe: the
|
|
EH edges are abnormal and SSA_NAME_OCCURS_IN_ABNORMAL_PHI must be
|
|
set, and this means that there will be no overlapping live ranges
|
|
for the underlying symbol.
|
|
|
|
This might change in future if we allow redirecting of EH edges and
|
|
we might want to change way build CFG pre-inlining to include
|
|
all the possible edges then. */
|
|
static void
|
|
update_ssa_across_abnormal_edges (basic_block bb, basic_block ret_bb,
|
|
bool can_throw, bool nonlocal_goto)
|
|
{
|
|
edge e;
|
|
edge_iterator ei;
|
|
|
|
FOR_EACH_EDGE (e, ei, bb->succs)
|
|
if (!e->dest->aux
|
|
|| ((basic_block)e->dest->aux)->index == ENTRY_BLOCK)
|
|
{
|
|
gimple phi;
|
|
gimple_stmt_iterator si;
|
|
|
|
if (!nonlocal_goto)
|
|
gcc_assert (e->flags & EDGE_EH);
|
|
|
|
if (!can_throw)
|
|
gcc_assert (!(e->flags & EDGE_EH));
|
|
|
|
for (si = gsi_start_phis (e->dest); !gsi_end_p (si); gsi_next (&si))
|
|
{
|
|
edge re;
|
|
|
|
phi = gsi_stmt (si);
|
|
|
|
/* There shouldn't be any PHI nodes in the ENTRY_BLOCK. */
|
|
gcc_assert (!e->dest->aux);
|
|
|
|
gcc_assert ((e->flags & EDGE_EH)
|
|
|| SSA_NAME_OCCURS_IN_ABNORMAL_PHI (PHI_RESULT (phi)));
|
|
|
|
if (!is_gimple_reg (PHI_RESULT (phi)))
|
|
{
|
|
mark_sym_for_renaming (SSA_NAME_VAR (PHI_RESULT (phi)));
|
|
continue;
|
|
}
|
|
|
|
re = find_edge (ret_bb, e->dest);
|
|
gcc_assert (re);
|
|
gcc_assert ((re->flags & (EDGE_EH | EDGE_ABNORMAL))
|
|
== (e->flags & (EDGE_EH | EDGE_ABNORMAL)));
|
|
|
|
SET_USE (PHI_ARG_DEF_PTR_FROM_EDGE (phi, e),
|
|
USE_FROM_PTR (PHI_ARG_DEF_PTR_FROM_EDGE (phi, re)));
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/* Copy edges from BB into its copy constructed earlier, scale profile
|
|
accordingly. Edges will be taken care of later. Assume aux
|
|
pointers to point to the copies of each BB. */
|
|
|
|
static void
|
|
copy_edges_for_bb (basic_block bb, gcov_type count_scale, basic_block ret_bb)
|
|
{
|
|
basic_block new_bb = (basic_block) bb->aux;
|
|
edge_iterator ei;
|
|
edge old_edge;
|
|
gimple_stmt_iterator si;
|
|
int flags;
|
|
|
|
/* Use the indices from the original blocks to create edges for the
|
|
new ones. */
|
|
FOR_EACH_EDGE (old_edge, ei, bb->succs)
|
|
if (!(old_edge->flags & EDGE_EH))
|
|
{
|
|
edge new_edge;
|
|
|
|
flags = old_edge->flags;
|
|
|
|
/* Return edges do get a FALLTHRU flag when the get inlined. */
|
|
if (old_edge->dest->index == EXIT_BLOCK && !old_edge->flags
|
|
&& old_edge->dest->aux != EXIT_BLOCK_PTR)
|
|
flags |= EDGE_FALLTHRU;
|
|
new_edge = make_edge (new_bb, (basic_block) old_edge->dest->aux, flags);
|
|
new_edge->count = old_edge->count * count_scale / REG_BR_PROB_BASE;
|
|
new_edge->probability = old_edge->probability;
|
|
}
|
|
|
|
if (bb->index == ENTRY_BLOCK || bb->index == EXIT_BLOCK)
|
|
return;
|
|
|
|
for (si = gsi_start_bb (new_bb); !gsi_end_p (si);)
|
|
{
|
|
gimple copy_stmt;
|
|
bool can_throw, nonlocal_goto;
|
|
|
|
copy_stmt = gsi_stmt (si);
|
|
update_stmt (copy_stmt);
|
|
if (gimple_in_ssa_p (cfun))
|
|
mark_symbols_for_renaming (copy_stmt);
|
|
|
|
/* Do this before the possible split_block. */
|
|
gsi_next (&si);
|
|
|
|
/* If this tree could throw an exception, there are two
|
|
cases where we need to add abnormal edge(s): the
|
|
tree wasn't in a region and there is a "current
|
|
region" in the caller; or the original tree had
|
|
EH edges. In both cases split the block after the tree,
|
|
and add abnormal edge(s) as needed; we need both
|
|
those from the callee and the caller.
|
|
We check whether the copy can throw, because the const
|
|
propagation can change an INDIRECT_REF which throws
|
|
into a COMPONENT_REF which doesn't. If the copy
|
|
can throw, the original could also throw. */
|
|
can_throw = stmt_can_throw_internal (copy_stmt);
|
|
nonlocal_goto = stmt_can_make_abnormal_goto (copy_stmt);
|
|
|
|
if (can_throw || nonlocal_goto)
|
|
{
|
|
if (!gsi_end_p (si))
|
|
/* Note that bb's predecessor edges aren't necessarily
|
|
right at this point; split_block doesn't care. */
|
|
{
|
|
edge e = split_block (new_bb, copy_stmt);
|
|
|
|
new_bb = e->dest;
|
|
new_bb->aux = e->src->aux;
|
|
si = gsi_start_bb (new_bb);
|
|
}
|
|
}
|
|
|
|
if (can_throw)
|
|
make_eh_edges (copy_stmt);
|
|
|
|
if (nonlocal_goto)
|
|
make_abnormal_goto_edges (gimple_bb (copy_stmt), true);
|
|
|
|
if ((can_throw || nonlocal_goto)
|
|
&& gimple_in_ssa_p (cfun))
|
|
update_ssa_across_abnormal_edges (gimple_bb (copy_stmt), ret_bb,
|
|
can_throw, nonlocal_goto);
|
|
}
|
|
}
|
|
|
|
/* Copy the PHIs. All blocks and edges are copied, some blocks
|
|
was possibly split and new outgoing EH edges inserted.
|
|
BB points to the block of original function and AUX pointers links
|
|
the original and newly copied blocks. */
|
|
|
|
static void
|
|
copy_phis_for_bb (basic_block bb, copy_body_data *id)
|
|
{
|
|
basic_block const new_bb = (basic_block) bb->aux;
|
|
edge_iterator ei;
|
|
gimple phi;
|
|
gimple_stmt_iterator si;
|
|
|
|
for (si = gsi_start (phi_nodes (bb)); !gsi_end_p (si); gsi_next (&si))
|
|
{
|
|
tree res, new_res;
|
|
gimple new_phi;
|
|
edge new_edge;
|
|
|
|
phi = gsi_stmt (si);
|
|
res = PHI_RESULT (phi);
|
|
new_res = res;
|
|
if (is_gimple_reg (res))
|
|
{
|
|
walk_tree (&new_res, copy_tree_body_r, id, NULL);
|
|
SSA_NAME_DEF_STMT (new_res)
|
|
= new_phi = create_phi_node (new_res, new_bb);
|
|
FOR_EACH_EDGE (new_edge, ei, new_bb->preds)
|
|
{
|
|
edge const old_edge
|
|
= find_edge ((basic_block) new_edge->src->aux, bb);
|
|
tree arg = PHI_ARG_DEF_FROM_EDGE (phi, old_edge);
|
|
tree new_arg = arg;
|
|
tree block = id->block;
|
|
id->block = NULL_TREE;
|
|
walk_tree (&new_arg, copy_tree_body_r, id, NULL);
|
|
id->block = block;
|
|
gcc_assert (new_arg);
|
|
/* With return slot optimization we can end up with
|
|
non-gimple (foo *)&this->m, fix that here. */
|
|
if (TREE_CODE (new_arg) != SSA_NAME
|
|
&& TREE_CODE (new_arg) != FUNCTION_DECL
|
|
&& !is_gimple_val (new_arg))
|
|
{
|
|
gimple_seq stmts = NULL;
|
|
new_arg = force_gimple_operand (new_arg, &stmts, true, NULL);
|
|
gsi_insert_seq_on_edge_immediate (new_edge, stmts);
|
|
}
|
|
add_phi_arg (new_phi, new_arg, new_edge);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/* Wrapper for remap_decl so it can be used as a callback. */
|
|
|
|
static tree
|
|
remap_decl_1 (tree decl, void *data)
|
|
{
|
|
return remap_decl (decl, (copy_body_data *) data);
|
|
}
|
|
|
|
/* Build struct function and associated datastructures for the new clone
|
|
NEW_FNDECL to be build. CALLEE_FNDECL is the original */
|
|
|
|
static void
|
|
initialize_cfun (tree new_fndecl, tree callee_fndecl, gcov_type count,
|
|
int frequency)
|
|
{
|
|
struct function *src_cfun = DECL_STRUCT_FUNCTION (callee_fndecl);
|
|
gcov_type count_scale, frequency_scale;
|
|
|
|
if (ENTRY_BLOCK_PTR_FOR_FUNCTION (src_cfun)->count)
|
|
count_scale = (REG_BR_PROB_BASE * count
|
|
/ ENTRY_BLOCK_PTR_FOR_FUNCTION (src_cfun)->count);
|
|
else
|
|
count_scale = 1;
|
|
|
|
if (ENTRY_BLOCK_PTR_FOR_FUNCTION (src_cfun)->frequency)
|
|
frequency_scale = (REG_BR_PROB_BASE * frequency
|
|
/
|
|
ENTRY_BLOCK_PTR_FOR_FUNCTION (src_cfun)->frequency);
|
|
else
|
|
frequency_scale = count_scale;
|
|
|
|
/* Register specific tree functions. */
|
|
gimple_register_cfg_hooks ();
|
|
|
|
/* Get clean struct function. */
|
|
push_struct_function (new_fndecl);
|
|
|
|
/* We will rebuild these, so just sanity check that they are empty. */
|
|
gcc_assert (VALUE_HISTOGRAMS (cfun) == NULL);
|
|
gcc_assert (cfun->local_decls == NULL);
|
|
gcc_assert (cfun->cfg == NULL);
|
|
gcc_assert (cfun->decl == new_fndecl);
|
|
|
|
/* Copy items we preserve during clonning. */
|
|
cfun->static_chain_decl = src_cfun->static_chain_decl;
|
|
cfun->nonlocal_goto_save_area = src_cfun->nonlocal_goto_save_area;
|
|
cfun->function_end_locus = src_cfun->function_end_locus;
|
|
cfun->curr_properties = src_cfun->curr_properties;
|
|
cfun->last_verified = src_cfun->last_verified;
|
|
if (src_cfun->ipa_transforms_to_apply)
|
|
cfun->ipa_transforms_to_apply = VEC_copy (ipa_opt_pass, heap,
|
|
src_cfun->ipa_transforms_to_apply);
|
|
cfun->va_list_gpr_size = src_cfun->va_list_gpr_size;
|
|
cfun->va_list_fpr_size = src_cfun->va_list_fpr_size;
|
|
cfun->function_frequency = src_cfun->function_frequency;
|
|
cfun->has_nonlocal_label = src_cfun->has_nonlocal_label;
|
|
cfun->stdarg = src_cfun->stdarg;
|
|
cfun->dont_save_pending_sizes_p = src_cfun->dont_save_pending_sizes_p;
|
|
cfun->after_inlining = src_cfun->after_inlining;
|
|
cfun->returns_struct = src_cfun->returns_struct;
|
|
cfun->returns_pcc_struct = src_cfun->returns_pcc_struct;
|
|
cfun->after_tree_profile = src_cfun->after_tree_profile;
|
|
|
|
init_empty_tree_cfg ();
|
|
|
|
ENTRY_BLOCK_PTR->count =
|
|
(ENTRY_BLOCK_PTR_FOR_FUNCTION (src_cfun)->count * count_scale /
|
|
REG_BR_PROB_BASE);
|
|
ENTRY_BLOCK_PTR->frequency =
|
|
(ENTRY_BLOCK_PTR_FOR_FUNCTION (src_cfun)->frequency *
|
|
frequency_scale / REG_BR_PROB_BASE);
|
|
EXIT_BLOCK_PTR->count =
|
|
(EXIT_BLOCK_PTR_FOR_FUNCTION (src_cfun)->count * count_scale /
|
|
REG_BR_PROB_BASE);
|
|
EXIT_BLOCK_PTR->frequency =
|
|
(EXIT_BLOCK_PTR_FOR_FUNCTION (src_cfun)->frequency *
|
|
frequency_scale / REG_BR_PROB_BASE);
|
|
if (src_cfun->eh)
|
|
init_eh_for_function ();
|
|
|
|
if (src_cfun->gimple_df)
|
|
{
|
|
init_tree_ssa (cfun);
|
|
cfun->gimple_df->in_ssa_p = true;
|
|
init_ssa_operands ();
|
|
}
|
|
pop_cfun ();
|
|
}
|
|
|
|
/* Make a copy of the body of FN so that it can be inserted inline in
|
|
another function. Walks FN via CFG, returns new fndecl. */
|
|
|
|
static tree
|
|
copy_cfg_body (copy_body_data * id, gcov_type count, int frequency,
|
|
basic_block entry_block_map, basic_block exit_block_map)
|
|
{
|
|
tree callee_fndecl = id->src_fn;
|
|
/* Original cfun for the callee, doesn't change. */
|
|
struct function *src_cfun = DECL_STRUCT_FUNCTION (callee_fndecl);
|
|
struct function *cfun_to_copy;
|
|
basic_block bb;
|
|
tree new_fndecl = NULL;
|
|
gcov_type count_scale, frequency_scale;
|
|
int last;
|
|
|
|
if (ENTRY_BLOCK_PTR_FOR_FUNCTION (src_cfun)->count)
|
|
count_scale = (REG_BR_PROB_BASE * count
|
|
/ ENTRY_BLOCK_PTR_FOR_FUNCTION (src_cfun)->count);
|
|
else
|
|
count_scale = 1;
|
|
|
|
if (ENTRY_BLOCK_PTR_FOR_FUNCTION (src_cfun)->frequency)
|
|
frequency_scale = (REG_BR_PROB_BASE * frequency
|
|
/
|
|
ENTRY_BLOCK_PTR_FOR_FUNCTION (src_cfun)->frequency);
|
|
else
|
|
frequency_scale = count_scale;
|
|
|
|
/* Register specific tree functions. */
|
|
gimple_register_cfg_hooks ();
|
|
|
|
/* Must have a CFG here at this point. */
|
|
gcc_assert (ENTRY_BLOCK_PTR_FOR_FUNCTION
|
|
(DECL_STRUCT_FUNCTION (callee_fndecl)));
|
|
|
|
cfun_to_copy = id->src_cfun = DECL_STRUCT_FUNCTION (callee_fndecl);
|
|
|
|
ENTRY_BLOCK_PTR_FOR_FUNCTION (cfun_to_copy)->aux = entry_block_map;
|
|
EXIT_BLOCK_PTR_FOR_FUNCTION (cfun_to_copy)->aux = exit_block_map;
|
|
entry_block_map->aux = ENTRY_BLOCK_PTR_FOR_FUNCTION (cfun_to_copy);
|
|
exit_block_map->aux = EXIT_BLOCK_PTR_FOR_FUNCTION (cfun_to_copy);
|
|
|
|
/* Duplicate any exception-handling regions. */
|
|
if (cfun->eh)
|
|
{
|
|
id->eh_region_offset
|
|
= duplicate_eh_regions (cfun_to_copy, remap_decl_1, id,
|
|
0, id->eh_region);
|
|
}
|
|
|
|
/* Use aux pointers to map the original blocks to copy. */
|
|
FOR_EACH_BB_FN (bb, cfun_to_copy)
|
|
{
|
|
basic_block new_bb = copy_bb (id, bb, frequency_scale, count_scale);
|
|
bb->aux = new_bb;
|
|
new_bb->aux = bb;
|
|
}
|
|
|
|
last = last_basic_block;
|
|
|
|
/* Now that we've duplicated the blocks, duplicate their edges. */
|
|
FOR_ALL_BB_FN (bb, cfun_to_copy)
|
|
copy_edges_for_bb (bb, count_scale, exit_block_map);
|
|
|
|
if (gimple_in_ssa_p (cfun))
|
|
FOR_ALL_BB_FN (bb, cfun_to_copy)
|
|
copy_phis_for_bb (bb, id);
|
|
|
|
FOR_ALL_BB_FN (bb, cfun_to_copy)
|
|
{
|
|
((basic_block)bb->aux)->aux = NULL;
|
|
bb->aux = NULL;
|
|
}
|
|
|
|
/* Zero out AUX fields of newly created block during EH edge
|
|
insertion. */
|
|
for (; last < last_basic_block; last++)
|
|
BASIC_BLOCK (last)->aux = NULL;
|
|
entry_block_map->aux = NULL;
|
|
exit_block_map->aux = NULL;
|
|
|
|
return new_fndecl;
|
|
}
|
|
|
|
static tree
|
|
copy_body (copy_body_data *id, gcov_type count, int frequency,
|
|
basic_block entry_block_map, basic_block exit_block_map)
|
|
{
|
|
tree fndecl = id->src_fn;
|
|
tree body;
|
|
|
|
/* If this body has a CFG, walk CFG and copy. */
|
|
gcc_assert (ENTRY_BLOCK_PTR_FOR_FUNCTION (DECL_STRUCT_FUNCTION (fndecl)));
|
|
body = copy_cfg_body (id, count, frequency, entry_block_map, exit_block_map);
|
|
|
|
return body;
|
|
}
|
|
|
|
/* Return true if VALUE is an ADDR_EXPR of an automatic variable
|
|
defined in function FN, or of a data member thereof. */
|
|
|
|
static bool
|
|
self_inlining_addr_expr (tree value, tree fn)
|
|
{
|
|
tree var;
|
|
|
|
if (TREE_CODE (value) != ADDR_EXPR)
|
|
return false;
|
|
|
|
var = get_base_address (TREE_OPERAND (value, 0));
|
|
|
|
return var && auto_var_in_fn_p (var, fn);
|
|
}
|
|
|
|
static void
|
|
insert_init_stmt (basic_block bb, gimple init_stmt)
|
|
{
|
|
/* If VAR represents a zero-sized variable, it's possible that the
|
|
assignment statement may result in no gimple statements. */
|
|
if (init_stmt)
|
|
{
|
|
gimple_stmt_iterator si = gsi_last_bb (bb);
|
|
|
|
/* We can end up with init statements that store to a non-register
|
|
from a rhs with a conversion. Handle that here by forcing the
|
|
rhs into a temporary. gimple_regimplify_operands is not
|
|
prepared to do this for us. */
|
|
if (!is_gimple_reg (gimple_assign_lhs (init_stmt))
|
|
&& is_gimple_reg_type (TREE_TYPE (gimple_assign_lhs (init_stmt)))
|
|
&& gimple_assign_rhs_class (init_stmt) == GIMPLE_UNARY_RHS)
|
|
{
|
|
tree rhs = build1 (gimple_assign_rhs_code (init_stmt),
|
|
gimple_expr_type (init_stmt),
|
|
gimple_assign_rhs1 (init_stmt));
|
|
rhs = force_gimple_operand_gsi (&si, rhs, true, NULL_TREE, false,
|
|
GSI_NEW_STMT);
|
|
gimple_assign_set_rhs_code (init_stmt, TREE_CODE (rhs));
|
|
gimple_assign_set_rhs1 (init_stmt, rhs);
|
|
}
|
|
gsi_insert_after (&si, init_stmt, GSI_NEW_STMT);
|
|
gimple_regimplify_operands (init_stmt, &si);
|
|
mark_symbols_for_renaming (init_stmt);
|
|
}
|
|
}
|
|
|
|
/* Initialize parameter P with VALUE. If needed, produce init statement
|
|
at the end of BB. When BB is NULL, we return init statement to be
|
|
output later. */
|
|
static gimple
|
|
setup_one_parameter (copy_body_data *id, tree p, tree value, tree fn,
|
|
basic_block bb, tree *vars)
|
|
{
|
|
gimple init_stmt = NULL;
|
|
tree var;
|
|
tree rhs = value;
|
|
tree def = (gimple_in_ssa_p (cfun)
|
|
? gimple_default_def (id->src_cfun, p) : NULL);
|
|
|
|
if (value
|
|
&& value != error_mark_node
|
|
&& !useless_type_conversion_p (TREE_TYPE (p), TREE_TYPE (value)))
|
|
{
|
|
if (fold_convertible_p (TREE_TYPE (p), value))
|
|
rhs = fold_build1 (NOP_EXPR, TREE_TYPE (p), value);
|
|
else
|
|
/* ??? For valid (GIMPLE) programs we should not end up here.
|
|
Still if something has gone wrong and we end up with truly
|
|
mismatched types here, fall back to using a VIEW_CONVERT_EXPR
|
|
to not leak invalid GIMPLE to the following passes. */
|
|
rhs = fold_build1 (VIEW_CONVERT_EXPR, TREE_TYPE (p), value);
|
|
}
|
|
|
|
/* If the parameter is never assigned to, has no SSA_NAMEs created,
|
|
we may not need to create a new variable here at all. Instead, we may
|
|
be able to just use the argument value. */
|
|
if (TREE_READONLY (p)
|
|
&& !TREE_ADDRESSABLE (p)
|
|
&& value && !TREE_SIDE_EFFECTS (value)
|
|
&& !def)
|
|
{
|
|
/* We may produce non-gimple trees by adding NOPs or introduce
|
|
invalid sharing when operand is not really constant.
|
|
It is not big deal to prohibit constant propagation here as
|
|
we will constant propagate in DOM1 pass anyway. */
|
|
if (is_gimple_min_invariant (value)
|
|
&& useless_type_conversion_p (TREE_TYPE (p),
|
|
TREE_TYPE (value))
|
|
/* We have to be very careful about ADDR_EXPR. Make sure
|
|
the base variable isn't a local variable of the inlined
|
|
function, e.g., when doing recursive inlining, direct or
|
|
mutually-recursive or whatever, which is why we don't
|
|
just test whether fn == current_function_decl. */
|
|
&& ! self_inlining_addr_expr (value, fn))
|
|
{
|
|
insert_decl_map (id, p, value);
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
/* Make an equivalent VAR_DECL. Note that we must NOT remap the type
|
|
here since the type of this decl must be visible to the calling
|
|
function. */
|
|
var = copy_decl_to_var (p, id);
|
|
if (gimple_in_ssa_p (cfun) && TREE_CODE (var) == VAR_DECL)
|
|
{
|
|
get_var_ann (var);
|
|
add_referenced_var (var);
|
|
}
|
|
|
|
/* Register the VAR_DECL as the equivalent for the PARM_DECL;
|
|
that way, when the PARM_DECL is encountered, it will be
|
|
automatically replaced by the VAR_DECL. */
|
|
insert_decl_map (id, p, var);
|
|
|
|
/* Declare this new variable. */
|
|
TREE_CHAIN (var) = *vars;
|
|
*vars = var;
|
|
|
|
/* Make gimplifier happy about this variable. */
|
|
DECL_SEEN_IN_BIND_EXPR_P (var) = 1;
|
|
|
|
/* Even if P was TREE_READONLY, the new VAR should not be.
|
|
In the original code, we would have constructed a
|
|
temporary, and then the function body would have never
|
|
changed the value of P. However, now, we will be
|
|
constructing VAR directly. The constructor body may
|
|
change its value multiple times as it is being
|
|
constructed. Therefore, it must not be TREE_READONLY;
|
|
the back-end assumes that TREE_READONLY variable is
|
|
assigned to only once. */
|
|
if (TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (p)))
|
|
TREE_READONLY (var) = 0;
|
|
|
|
/* If there is no setup required and we are in SSA, take the easy route
|
|
replacing all SSA names representing the function parameter by the
|
|
SSA name passed to function.
|
|
|
|
We need to construct map for the variable anyway as it might be used
|
|
in different SSA names when parameter is set in function.
|
|
|
|
Do replacement at -O0 for const arguments replaced by constant.
|
|
This is important for builtin_constant_p and other construct requiring
|
|
constant argument to be visible in inlined function body.
|
|
|
|
FIXME: This usually kills the last connection in between inlined
|
|
function parameter and the actual value in debug info. Can we do
|
|
better here? If we just inserted the statement, copy propagation
|
|
would kill it anyway as it always did in older versions of GCC.
|
|
|
|
We might want to introduce a notion that single SSA_NAME might
|
|
represent multiple variables for purposes of debugging. */
|
|
if (gimple_in_ssa_p (cfun) && rhs && def && is_gimple_reg (p)
|
|
&& (optimize
|
|
|| (TREE_READONLY (p)
|
|
&& is_gimple_min_invariant (rhs)))
|
|
&& (TREE_CODE (rhs) == SSA_NAME
|
|
|| is_gimple_min_invariant (rhs))
|
|
&& !SSA_NAME_OCCURS_IN_ABNORMAL_PHI (def))
|
|
{
|
|
insert_decl_map (id, def, rhs);
|
|
return NULL;
|
|
}
|
|
|
|
/* If the value of argument is never used, don't care about initializing
|
|
it. */
|
|
if (optimize && gimple_in_ssa_p (cfun) && !def && is_gimple_reg (p))
|
|
{
|
|
gcc_assert (!value || !TREE_SIDE_EFFECTS (value));
|
|
return NULL;
|
|
}
|
|
|
|
/* Initialize this VAR_DECL from the equivalent argument. Convert
|
|
the argument to the proper type in case it was promoted. */
|
|
if (value)
|
|
{
|
|
if (rhs == error_mark_node)
|
|
{
|
|
insert_decl_map (id, p, var);
|
|
return NULL;
|
|
}
|
|
|
|
STRIP_USELESS_TYPE_CONVERSION (rhs);
|
|
|
|
/* We want to use MODIFY_EXPR, not INIT_EXPR here so that we
|
|
keep our trees in gimple form. */
|
|
if (def && gimple_in_ssa_p (cfun) && is_gimple_reg (p))
|
|
{
|
|
def = remap_ssa_name (def, id);
|
|
init_stmt = gimple_build_assign (def, rhs);
|
|
SSA_NAME_IS_DEFAULT_DEF (def) = 0;
|
|
set_default_def (var, NULL);
|
|
}
|
|
else
|
|
init_stmt = gimple_build_assign (var, rhs);
|
|
|
|
if (bb && init_stmt)
|
|
insert_init_stmt (bb, init_stmt);
|
|
}
|
|
return init_stmt;
|
|
}
|
|
|
|
/* Generate code to initialize the parameters of the function at the
|
|
top of the stack in ID from the GIMPLE_CALL STMT. */
|
|
|
|
static void
|
|
initialize_inlined_parameters (copy_body_data *id, gimple stmt,
|
|
tree fn, basic_block bb)
|
|
{
|
|
tree parms;
|
|
size_t i;
|
|
tree p;
|
|
tree vars = NULL_TREE;
|
|
tree static_chain = gimple_call_chain (stmt);
|
|
|
|
/* Figure out what the parameters are. */
|
|
parms = DECL_ARGUMENTS (fn);
|
|
|
|
/* Loop through the parameter declarations, replacing each with an
|
|
equivalent VAR_DECL, appropriately initialized. */
|
|
for (p = parms, i = 0; p; p = TREE_CHAIN (p), i++)
|
|
{
|
|
tree val;
|
|
val = i < gimple_call_num_args (stmt) ? gimple_call_arg (stmt, i) : NULL;
|
|
setup_one_parameter (id, p, val, fn, bb, &vars);
|
|
}
|
|
|
|
/* Initialize the static chain. */
|
|
p = DECL_STRUCT_FUNCTION (fn)->static_chain_decl;
|
|
gcc_assert (fn != current_function_decl);
|
|
if (p)
|
|
{
|
|
/* No static chain? Seems like a bug in tree-nested.c. */
|
|
gcc_assert (static_chain);
|
|
|
|
setup_one_parameter (id, p, static_chain, fn, bb, &vars);
|
|
}
|
|
|
|
declare_inline_vars (id->block, vars);
|
|
}
|
|
|
|
|
|
/* Declare a return variable to replace the RESULT_DECL for the
|
|
function we are calling. An appropriate DECL_STMT is returned.
|
|
The USE_STMT is filled to contain a use of the declaration to
|
|
indicate the return value of the function.
|
|
|
|
RETURN_SLOT, if non-null is place where to store the result. It
|
|
is set only for CALL_EXPR_RETURN_SLOT_OPT. MODIFY_DEST, if non-null,
|
|
was the LHS of the MODIFY_EXPR to which this call is the RHS.
|
|
|
|
The return value is a (possibly null) value that is the result of the
|
|
function as seen by the callee. *USE_P is a (possibly null) value that
|
|
holds the result as seen by the caller. */
|
|
|
|
static tree
|
|
declare_return_variable (copy_body_data *id, tree return_slot, tree modify_dest,
|
|
tree *use_p)
|
|
{
|
|
tree callee = id->src_fn;
|
|
tree caller = id->dst_fn;
|
|
tree result = DECL_RESULT (callee);
|
|
tree callee_type = TREE_TYPE (result);
|
|
tree caller_type = TREE_TYPE (TREE_TYPE (callee));
|
|
tree var, use;
|
|
|
|
/* We don't need to do anything for functions that don't return
|
|
anything. */
|
|
if (!result || VOID_TYPE_P (callee_type))
|
|
{
|
|
*use_p = NULL_TREE;
|
|
return NULL_TREE;
|
|
}
|
|
|
|
/* If there was a return slot, then the return value is the
|
|
dereferenced address of that object. */
|
|
if (return_slot)
|
|
{
|
|
/* The front end shouldn't have used both return_slot and
|
|
a modify expression. */
|
|
gcc_assert (!modify_dest);
|
|
if (DECL_BY_REFERENCE (result))
|
|
{
|
|
tree return_slot_addr = build_fold_addr_expr (return_slot);
|
|
STRIP_USELESS_TYPE_CONVERSION (return_slot_addr);
|
|
|
|
/* We are going to construct *&return_slot and we can't do that
|
|
for variables believed to be not addressable.
|
|
|
|
FIXME: This check possibly can match, because values returned
|
|
via return slot optimization are not believed to have address
|
|
taken by alias analysis. */
|
|
gcc_assert (TREE_CODE (return_slot) != SSA_NAME);
|
|
if (gimple_in_ssa_p (cfun))
|
|
{
|
|
HOST_WIDE_INT bitsize;
|
|
HOST_WIDE_INT bitpos;
|
|
tree offset;
|
|
enum machine_mode mode;
|
|
int unsignedp;
|
|
int volatilep;
|
|
tree base;
|
|
base = get_inner_reference (return_slot, &bitsize, &bitpos,
|
|
&offset,
|
|
&mode, &unsignedp, &volatilep,
|
|
false);
|
|
if (TREE_CODE (base) == INDIRECT_REF)
|
|
base = TREE_OPERAND (base, 0);
|
|
if (TREE_CODE (base) == SSA_NAME)
|
|
base = SSA_NAME_VAR (base);
|
|
mark_sym_for_renaming (base);
|
|
}
|
|
var = return_slot_addr;
|
|
}
|
|
else
|
|
{
|
|
var = return_slot;
|
|
gcc_assert (TREE_CODE (var) != SSA_NAME);
|
|
TREE_ADDRESSABLE (var) |= TREE_ADDRESSABLE (result);
|
|
}
|
|
if ((TREE_CODE (TREE_TYPE (result)) == COMPLEX_TYPE
|
|
|| TREE_CODE (TREE_TYPE (result)) == VECTOR_TYPE)
|
|
&& !DECL_GIMPLE_REG_P (result)
|
|
&& DECL_P (var))
|
|
DECL_GIMPLE_REG_P (var) = 0;
|
|
use = NULL;
|
|
goto done;
|
|
}
|
|
|
|
/* All types requiring non-trivial constructors should have been handled. */
|
|
gcc_assert (!TREE_ADDRESSABLE (callee_type));
|
|
|
|
/* Attempt to avoid creating a new temporary variable. */
|
|
if (modify_dest
|
|
&& TREE_CODE (modify_dest) != SSA_NAME)
|
|
{
|
|
bool use_it = false;
|
|
|
|
/* We can't use MODIFY_DEST if there's type promotion involved. */
|
|
if (!useless_type_conversion_p (callee_type, caller_type))
|
|
use_it = false;
|
|
|
|
/* ??? If we're assigning to a variable sized type, then we must
|
|
reuse the destination variable, because we've no good way to
|
|
create variable sized temporaries at this point. */
|
|
else if (TREE_CODE (TYPE_SIZE_UNIT (caller_type)) != INTEGER_CST)
|
|
use_it = true;
|
|
|
|
/* If the callee cannot possibly modify MODIFY_DEST, then we can
|
|
reuse it as the result of the call directly. Don't do this if
|
|
it would promote MODIFY_DEST to addressable. */
|
|
else if (TREE_ADDRESSABLE (result))
|
|
use_it = false;
|
|
else
|
|
{
|
|
tree base_m = get_base_address (modify_dest);
|
|
|
|
/* If the base isn't a decl, then it's a pointer, and we don't
|
|
know where that's going to go. */
|
|
if (!DECL_P (base_m))
|
|
use_it = false;
|
|
else if (is_global_var (base_m))
|
|
use_it = false;
|
|
else if ((TREE_CODE (TREE_TYPE (result)) == COMPLEX_TYPE
|
|
|| TREE_CODE (TREE_TYPE (result)) == VECTOR_TYPE)
|
|
&& !DECL_GIMPLE_REG_P (result)
|
|
&& DECL_GIMPLE_REG_P (base_m))
|
|
use_it = false;
|
|
else if (!TREE_ADDRESSABLE (base_m))
|
|
use_it = true;
|
|
}
|
|
|
|
if (use_it)
|
|
{
|
|
var = modify_dest;
|
|
use = NULL;
|
|
goto done;
|
|
}
|
|
}
|
|
|
|
gcc_assert (TREE_CODE (TYPE_SIZE_UNIT (callee_type)) == INTEGER_CST);
|
|
|
|
var = copy_result_decl_to_var (result, id);
|
|
if (gimple_in_ssa_p (cfun))
|
|
{
|
|
get_var_ann (var);
|
|
add_referenced_var (var);
|
|
}
|
|
|
|
DECL_SEEN_IN_BIND_EXPR_P (var) = 1;
|
|
DECL_STRUCT_FUNCTION (caller)->local_decls
|
|
= tree_cons (NULL_TREE, var,
|
|
DECL_STRUCT_FUNCTION (caller)->local_decls);
|
|
|
|
/* Do not have the rest of GCC warn about this variable as it should
|
|
not be visible to the user. */
|
|
TREE_NO_WARNING (var) = 1;
|
|
|
|
declare_inline_vars (id->block, var);
|
|
|
|
/* Build the use expr. If the return type of the function was
|
|
promoted, convert it back to the expected type. */
|
|
use = var;
|
|
if (!useless_type_conversion_p (caller_type, TREE_TYPE (var)))
|
|
use = fold_convert (caller_type, var);
|
|
|
|
STRIP_USELESS_TYPE_CONVERSION (use);
|
|
|
|
if (DECL_BY_REFERENCE (result))
|
|
{
|
|
TREE_ADDRESSABLE (var) = 1;
|
|
var = build_fold_addr_expr (var);
|
|
}
|
|
|
|
done:
|
|
/* Register the VAR_DECL as the equivalent for the RESULT_DECL; that
|
|
way, when the RESULT_DECL is encountered, it will be
|
|
automatically replaced by the VAR_DECL. */
|
|
insert_decl_map (id, result, var);
|
|
|
|
/* Remember this so we can ignore it in remap_decls. */
|
|
id->retvar = var;
|
|
|
|
*use_p = use;
|
|
return var;
|
|
}
|
|
|
|
/* Returns nonzero if a function can be inlined as a tree. */
|
|
|
|
bool
|
|
tree_inlinable_function_p (tree fn)
|
|
{
|
|
return inlinable_function_p (fn);
|
|
}
|
|
|
|
static const char *inline_forbidden_reason;
|
|
|
|
/* A callback for walk_gimple_seq to handle tree operands. Returns
|
|
NULL_TREE if a function can be inlined, otherwise sets the reason
|
|
why not and returns a tree representing the offending operand. */
|
|
|
|
static tree
|
|
inline_forbidden_p_op (tree *nodep, int *walk_subtrees ATTRIBUTE_UNUSED,
|
|
void *fnp ATTRIBUTE_UNUSED)
|
|
{
|
|
tree node = *nodep;
|
|
tree t;
|
|
|
|
if (TREE_CODE (node) == RECORD_TYPE || TREE_CODE (node) == UNION_TYPE)
|
|
{
|
|
/* We cannot inline a function of the form
|
|
|
|
void F (int i) { struct S { int ar[i]; } s; }
|
|
|
|
Attempting to do so produces a catch-22.
|
|
If walk_tree examines the TYPE_FIELDS chain of RECORD_TYPE/
|
|
UNION_TYPE nodes, then it goes into infinite recursion on a
|
|
structure containing a pointer to its own type. If it doesn't,
|
|
then the type node for S doesn't get adjusted properly when
|
|
F is inlined.
|
|
|
|
??? This is likely no longer true, but it's too late in the 4.0
|
|
cycle to try to find out. This should be checked for 4.1. */
|
|
for (t = TYPE_FIELDS (node); t; t = TREE_CHAIN (t))
|
|
if (variably_modified_type_p (TREE_TYPE (t), NULL))
|
|
{
|
|
inline_forbidden_reason
|
|
= G_("function %q+F can never be inlined "
|
|
"because it uses variable sized variables");
|
|
return node;
|
|
}
|
|
}
|
|
|
|
return NULL_TREE;
|
|
}
|
|
|
|
|
|
/* A callback for walk_gimple_seq to handle statements. Returns
|
|
non-NULL iff a function can not be inlined. Also sets the reason
|
|
why. */
|
|
|
|
static tree
|
|
inline_forbidden_p_stmt (gimple_stmt_iterator *gsi, bool *handled_ops_p,
|
|
struct walk_stmt_info *wip)
|
|
{
|
|
tree fn = (tree) wip->info;
|
|
tree t;
|
|
gimple stmt = gsi_stmt (*gsi);
|
|
|
|
switch (gimple_code (stmt))
|
|
{
|
|
case GIMPLE_CALL:
|
|
/* Refuse to inline alloca call unless user explicitly forced so as
|
|
this may change program's memory overhead drastically when the
|
|
function using alloca is called in loop. In GCC present in
|
|
SPEC2000 inlining into schedule_block cause it to require 2GB of
|
|
RAM instead of 256MB. */
|
|
if (gimple_alloca_call_p (stmt)
|
|
&& !lookup_attribute ("always_inline", DECL_ATTRIBUTES (fn)))
|
|
{
|
|
inline_forbidden_reason
|
|
= G_("function %q+F can never be inlined because it uses "
|
|
"alloca (override using the always_inline attribute)");
|
|
*handled_ops_p = true;
|
|
return fn;
|
|
}
|
|
|
|
t = gimple_call_fndecl (stmt);
|
|
if (t == NULL_TREE)
|
|
break;
|
|
|
|
/* We cannot inline functions that call setjmp. */
|
|
if (setjmp_call_p (t))
|
|
{
|
|
inline_forbidden_reason
|
|
= G_("function %q+F can never be inlined because it uses setjmp");
|
|
*handled_ops_p = true;
|
|
return t;
|
|
}
|
|
|
|
if (DECL_BUILT_IN_CLASS (t) == BUILT_IN_NORMAL)
|
|
switch (DECL_FUNCTION_CODE (t))
|
|
{
|
|
/* We cannot inline functions that take a variable number of
|
|
arguments. */
|
|
case BUILT_IN_VA_START:
|
|
case BUILT_IN_NEXT_ARG:
|
|
case BUILT_IN_VA_END:
|
|
inline_forbidden_reason
|
|
= G_("function %q+F can never be inlined because it "
|
|
"uses variable argument lists");
|
|
*handled_ops_p = true;
|
|
return t;
|
|
|
|
case BUILT_IN_LONGJMP:
|
|
/* We can't inline functions that call __builtin_longjmp at
|
|
all. The non-local goto machinery really requires the
|
|
destination be in a different function. If we allow the
|
|
function calling __builtin_longjmp to be inlined into the
|
|
function calling __builtin_setjmp, Things will Go Awry. */
|
|
inline_forbidden_reason
|
|
= G_("function %q+F can never be inlined because "
|
|
"it uses setjmp-longjmp exception handling");
|
|
*handled_ops_p = true;
|
|
return t;
|
|
|
|
case BUILT_IN_NONLOCAL_GOTO:
|
|
/* Similarly. */
|
|
inline_forbidden_reason
|
|
= G_("function %q+F can never be inlined because "
|
|
"it uses non-local goto");
|
|
*handled_ops_p = true;
|
|
return t;
|
|
|
|
case BUILT_IN_RETURN:
|
|
case BUILT_IN_APPLY_ARGS:
|
|
/* If a __builtin_apply_args caller would be inlined,
|
|
it would be saving arguments of the function it has
|
|
been inlined into. Similarly __builtin_return would
|
|
return from the function the inline has been inlined into. */
|
|
inline_forbidden_reason
|
|
= G_("function %q+F can never be inlined because "
|
|
"it uses __builtin_return or __builtin_apply_args");
|
|
*handled_ops_p = true;
|
|
return t;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case GIMPLE_GOTO:
|
|
t = gimple_goto_dest (stmt);
|
|
|
|
/* We will not inline a function which uses computed goto. The
|
|
addresses of its local labels, which may be tucked into
|
|
global storage, are of course not constant across
|
|
instantiations, which causes unexpected behavior. */
|
|
if (TREE_CODE (t) != LABEL_DECL)
|
|
{
|
|
inline_forbidden_reason
|
|
= G_("function %q+F can never be inlined "
|
|
"because it contains a computed goto");
|
|
*handled_ops_p = true;
|
|
return t;
|
|
}
|
|
break;
|
|
|
|
case GIMPLE_LABEL:
|
|
t = gimple_label_label (stmt);
|
|
if (DECL_NONLOCAL (t))
|
|
{
|
|
/* We cannot inline a function that receives a non-local goto
|
|
because we cannot remap the destination label used in the
|
|
function that is performing the non-local goto. */
|
|
inline_forbidden_reason
|
|
= G_("function %q+F can never be inlined "
|
|
"because it receives a non-local goto");
|
|
*handled_ops_p = true;
|
|
return t;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
*handled_ops_p = false;
|
|
return NULL_TREE;
|
|
}
|
|
|
|
|
|
static tree
|
|
inline_forbidden_p_2 (tree *nodep, int *walk_subtrees,
|
|
void *fnp)
|
|
{
|
|
tree node = *nodep;
|
|
tree fn = (tree) fnp;
|
|
|
|
if (TREE_CODE (node) == LABEL_DECL && DECL_CONTEXT (node) == fn)
|
|
{
|
|
inline_forbidden_reason
|
|
= G_("function %q+F can never be inlined "
|
|
"because it saves address of local label in a static variable");
|
|
return node;
|
|
}
|
|
|
|
if (TYPE_P (node))
|
|
*walk_subtrees = 0;
|
|
|
|
return NULL_TREE;
|
|
}
|
|
|
|
/* Return true if FNDECL is a function that cannot be inlined into
|
|
another one. */
|
|
|
|
static bool
|
|
inline_forbidden_p (tree fndecl)
|
|
{
|
|
location_t saved_loc = input_location;
|
|
struct function *fun = DECL_STRUCT_FUNCTION (fndecl);
|
|
tree step;
|
|
struct walk_stmt_info wi;
|
|
struct pointer_set_t *visited_nodes;
|
|
basic_block bb;
|
|
bool forbidden_p = false;
|
|
|
|
visited_nodes = pointer_set_create ();
|
|
memset (&wi, 0, sizeof (wi));
|
|
wi.info = (void *) fndecl;
|
|
wi.pset = visited_nodes;
|
|
|
|
FOR_EACH_BB_FN (bb, fun)
|
|
{
|
|
gimple ret;
|
|
gimple_seq seq = bb_seq (bb);
|
|
ret = walk_gimple_seq (seq, inline_forbidden_p_stmt,
|
|
inline_forbidden_p_op, &wi);
|
|
forbidden_p = (ret != NULL);
|
|
if (forbidden_p)
|
|
goto egress;
|
|
}
|
|
|
|
for (step = fun->local_decls; step; step = TREE_CHAIN (step))
|
|
{
|
|
tree decl = TREE_VALUE (step);
|
|
if (TREE_CODE (decl) == VAR_DECL
|
|
&& TREE_STATIC (decl)
|
|
&& !DECL_EXTERNAL (decl)
|
|
&& DECL_INITIAL (decl))
|
|
{
|
|
tree ret;
|
|
ret = walk_tree_without_duplicates (&DECL_INITIAL (decl),
|
|
inline_forbidden_p_2, fndecl);
|
|
forbidden_p = (ret != NULL);
|
|
if (forbidden_p)
|
|
goto egress;
|
|
}
|
|
}
|
|
|
|
egress:
|
|
pointer_set_destroy (visited_nodes);
|
|
input_location = saved_loc;
|
|
return forbidden_p;
|
|
}
|
|
|
|
/* Returns nonzero if FN is a function that does not have any
|
|
fundamental inline blocking properties. */
|
|
|
|
static bool
|
|
inlinable_function_p (tree fn)
|
|
{
|
|
bool inlinable = true;
|
|
bool do_warning;
|
|
tree always_inline;
|
|
|
|
/* If we've already decided this function shouldn't be inlined,
|
|
there's no need to check again. */
|
|
if (DECL_UNINLINABLE (fn))
|
|
return false;
|
|
|
|
/* We only warn for functions declared `inline' by the user. */
|
|
do_warning = (warn_inline
|
|
&& DECL_DECLARED_INLINE_P (fn)
|
|
&& !DECL_NO_INLINE_WARNING_P (fn)
|
|
&& !DECL_IN_SYSTEM_HEADER (fn));
|
|
|
|
always_inline = lookup_attribute ("always_inline", DECL_ATTRIBUTES (fn));
|
|
|
|
if (flag_no_inline
|
|
&& always_inline == NULL)
|
|
{
|
|
if (do_warning)
|
|
warning (OPT_Winline, "function %q+F can never be inlined because it "
|
|
"is suppressed using -fno-inline", fn);
|
|
inlinable = false;
|
|
}
|
|
|
|
/* Don't auto-inline anything that might not be bound within
|
|
this unit of translation. */
|
|
else if (!DECL_DECLARED_INLINE_P (fn)
|
|
&& DECL_REPLACEABLE_P (fn))
|
|
inlinable = false;
|
|
|
|
else if (!function_attribute_inlinable_p (fn))
|
|
{
|
|
if (do_warning)
|
|
warning (OPT_Winline, "function %q+F can never be inlined because it "
|
|
"uses attributes conflicting with inlining", fn);
|
|
inlinable = false;
|
|
}
|
|
|
|
else if (inline_forbidden_p (fn))
|
|
{
|
|
/* See if we should warn about uninlinable functions. Previously,
|
|
some of these warnings would be issued while trying to expand
|
|
the function inline, but that would cause multiple warnings
|
|
about functions that would for example call alloca. But since
|
|
this a property of the function, just one warning is enough.
|
|
As a bonus we can now give more details about the reason why a
|
|
function is not inlinable. */
|
|
if (always_inline)
|
|
sorry (inline_forbidden_reason, fn);
|
|
else if (do_warning)
|
|
warning (OPT_Winline, inline_forbidden_reason, fn);
|
|
|
|
inlinable = false;
|
|
}
|
|
|
|
/* Squirrel away the result so that we don't have to check again. */
|
|
DECL_UNINLINABLE (fn) = !inlinable;
|
|
|
|
return inlinable;
|
|
}
|
|
|
|
/* Estimate the cost of a memory move. Use machine dependent
|
|
word size and take possible memcpy call into account. */
|
|
|
|
int
|
|
estimate_move_cost (tree type)
|
|
{
|
|
HOST_WIDE_INT size;
|
|
|
|
size = int_size_in_bytes (type);
|
|
|
|
if (size < 0 || size > MOVE_MAX_PIECES * MOVE_RATIO (!optimize_size))
|
|
/* Cost of a memcpy call, 3 arguments and the call. */
|
|
return 4;
|
|
else
|
|
return ((size + MOVE_MAX_PIECES - 1) / MOVE_MAX_PIECES);
|
|
}
|
|
|
|
/* Returns cost of operation CODE, according to WEIGHTS */
|
|
|
|
static int
|
|
estimate_operator_cost (enum tree_code code, eni_weights *weights)
|
|
{
|
|
switch (code)
|
|
{
|
|
/* These are "free" conversions, or their presumed cost
|
|
is folded into other operations. */
|
|
case RANGE_EXPR:
|
|
CASE_CONVERT:
|
|
case COMPLEX_EXPR:
|
|
case PAREN_EXPR:
|
|
return 0;
|
|
|
|
/* Assign cost of 1 to usual operations.
|
|
??? We may consider mapping RTL costs to this. */
|
|
case COND_EXPR:
|
|
case VEC_COND_EXPR:
|
|
|
|
case PLUS_EXPR:
|
|
case POINTER_PLUS_EXPR:
|
|
case MINUS_EXPR:
|
|
case MULT_EXPR:
|
|
|
|
case FIXED_CONVERT_EXPR:
|
|
case FIX_TRUNC_EXPR:
|
|
|
|
case NEGATE_EXPR:
|
|
case FLOAT_EXPR:
|
|
case MIN_EXPR:
|
|
case MAX_EXPR:
|
|
case ABS_EXPR:
|
|
|
|
case LSHIFT_EXPR:
|
|
case RSHIFT_EXPR:
|
|
case LROTATE_EXPR:
|
|
case RROTATE_EXPR:
|
|
case VEC_LSHIFT_EXPR:
|
|
case VEC_RSHIFT_EXPR:
|
|
|
|
case BIT_IOR_EXPR:
|
|
case BIT_XOR_EXPR:
|
|
case BIT_AND_EXPR:
|
|
case BIT_NOT_EXPR:
|
|
|
|
case TRUTH_ANDIF_EXPR:
|
|
case TRUTH_ORIF_EXPR:
|
|
case TRUTH_AND_EXPR:
|
|
case TRUTH_OR_EXPR:
|
|
case TRUTH_XOR_EXPR:
|
|
case TRUTH_NOT_EXPR:
|
|
|
|
case LT_EXPR:
|
|
case LE_EXPR:
|
|
case GT_EXPR:
|
|
case GE_EXPR:
|
|
case EQ_EXPR:
|
|
case NE_EXPR:
|
|
case ORDERED_EXPR:
|
|
case UNORDERED_EXPR:
|
|
|
|
case UNLT_EXPR:
|
|
case UNLE_EXPR:
|
|
case UNGT_EXPR:
|
|
case UNGE_EXPR:
|
|
case UNEQ_EXPR:
|
|
case LTGT_EXPR:
|
|
|
|
case CONJ_EXPR:
|
|
|
|
case PREDECREMENT_EXPR:
|
|
case PREINCREMENT_EXPR:
|
|
case POSTDECREMENT_EXPR:
|
|
case POSTINCREMENT_EXPR:
|
|
|
|
case REALIGN_LOAD_EXPR:
|
|
|
|
case REDUC_MAX_EXPR:
|
|
case REDUC_MIN_EXPR:
|
|
case REDUC_PLUS_EXPR:
|
|
case WIDEN_SUM_EXPR:
|
|
case WIDEN_MULT_EXPR:
|
|
case DOT_PROD_EXPR:
|
|
|
|
case VEC_WIDEN_MULT_HI_EXPR:
|
|
case VEC_WIDEN_MULT_LO_EXPR:
|
|
case VEC_UNPACK_HI_EXPR:
|
|
case VEC_UNPACK_LO_EXPR:
|
|
case VEC_UNPACK_FLOAT_HI_EXPR:
|
|
case VEC_UNPACK_FLOAT_LO_EXPR:
|
|
case VEC_PACK_TRUNC_EXPR:
|
|
case VEC_PACK_SAT_EXPR:
|
|
case VEC_PACK_FIX_TRUNC_EXPR:
|
|
case VEC_EXTRACT_EVEN_EXPR:
|
|
case VEC_EXTRACT_ODD_EXPR:
|
|
case VEC_INTERLEAVE_HIGH_EXPR:
|
|
case VEC_INTERLEAVE_LOW_EXPR:
|
|
|
|
return 1;
|
|
|
|
/* Few special cases of expensive operations. This is useful
|
|
to avoid inlining on functions having too many of these. */
|
|
case TRUNC_DIV_EXPR:
|
|
case CEIL_DIV_EXPR:
|
|
case FLOOR_DIV_EXPR:
|
|
case ROUND_DIV_EXPR:
|
|
case EXACT_DIV_EXPR:
|
|
case TRUNC_MOD_EXPR:
|
|
case CEIL_MOD_EXPR:
|
|
case FLOOR_MOD_EXPR:
|
|
case ROUND_MOD_EXPR:
|
|
case RDIV_EXPR:
|
|
return weights->div_mod_cost;
|
|
|
|
default:
|
|
/* We expect a copy assignment with no operator. */
|
|
gcc_assert (get_gimple_rhs_class (code) == GIMPLE_SINGLE_RHS);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
|
|
/* Estimate number of instructions that will be created by expanding
|
|
the statements in the statement sequence STMTS.
|
|
WEIGHTS contains weights attributed to various constructs. */
|
|
|
|
static
|
|
int estimate_num_insns_seq (gimple_seq stmts, eni_weights *weights)
|
|
{
|
|
int cost;
|
|
gimple_stmt_iterator gsi;
|
|
|
|
cost = 0;
|
|
for (gsi = gsi_start (stmts); !gsi_end_p (gsi); gsi_next (&gsi))
|
|
cost += estimate_num_insns (gsi_stmt (gsi), weights);
|
|
|
|
return cost;
|
|
}
|
|
|
|
|
|
/* Estimate number of instructions that will be created by expanding STMT.
|
|
WEIGHTS contains weights attributed to various constructs. */
|
|
|
|
int
|
|
estimate_num_insns (gimple stmt, eni_weights *weights)
|
|
{
|
|
unsigned cost, i;
|
|
enum gimple_code code = gimple_code (stmt);
|
|
tree lhs;
|
|
|
|
switch (code)
|
|
{
|
|
case GIMPLE_ASSIGN:
|
|
/* Try to estimate the cost of assignments. We have three cases to
|
|
deal with:
|
|
1) Simple assignments to registers;
|
|
2) Stores to things that must live in memory. This includes
|
|
"normal" stores to scalars, but also assignments of large
|
|
structures, or constructors of big arrays;
|
|
|
|
Let us look at the first two cases, assuming we have "a = b + C":
|
|
<GIMPLE_ASSIGN <var_decl "a">
|
|
<plus_expr <var_decl "b"> <constant C>>
|
|
If "a" is a GIMPLE register, the assignment to it is free on almost
|
|
any target, because "a" usually ends up in a real register. Hence
|
|
the only cost of this expression comes from the PLUS_EXPR, and we
|
|
can ignore the GIMPLE_ASSIGN.
|
|
If "a" is not a GIMPLE register, the assignment to "a" will most
|
|
likely be a real store, so the cost of the GIMPLE_ASSIGN is the cost
|
|
of moving something into "a", which we compute using the function
|
|
estimate_move_cost. */
|
|
lhs = gimple_assign_lhs (stmt);
|
|
if (is_gimple_reg (lhs))
|
|
cost = 0;
|
|
else
|
|
cost = estimate_move_cost (TREE_TYPE (lhs));
|
|
|
|
cost += estimate_operator_cost (gimple_assign_rhs_code (stmt), weights);
|
|
break;
|
|
|
|
case GIMPLE_COND:
|
|
cost = 1 + estimate_operator_cost (gimple_cond_code (stmt), weights);
|
|
break;
|
|
|
|
case GIMPLE_SWITCH:
|
|
/* Take into account cost of the switch + guess 2 conditional jumps for
|
|
each case label.
|
|
|
|
TODO: once the switch expansion logic is sufficiently separated, we can
|
|
do better job on estimating cost of the switch. */
|
|
cost = gimple_switch_num_labels (stmt) * 2;
|
|
break;
|
|
|
|
case GIMPLE_CALL:
|
|
{
|
|
tree decl = gimple_call_fndecl (stmt);
|
|
tree addr = gimple_call_fn (stmt);
|
|
tree funtype = TREE_TYPE (addr);
|
|
|
|
if (POINTER_TYPE_P (funtype))
|
|
funtype = TREE_TYPE (funtype);
|
|
|
|
if (decl && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_MD)
|
|
cost = weights->target_builtin_call_cost;
|
|
else
|
|
cost = weights->call_cost;
|
|
|
|
if (decl && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL)
|
|
switch (DECL_FUNCTION_CODE (decl))
|
|
{
|
|
case BUILT_IN_CONSTANT_P:
|
|
return 0;
|
|
case BUILT_IN_EXPECT:
|
|
cost = 0;
|
|
break;
|
|
|
|
/* Prefetch instruction is not expensive. */
|
|
case BUILT_IN_PREFETCH:
|
|
cost = weights->target_builtin_call_cost;
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if (decl)
|
|
funtype = TREE_TYPE (decl);
|
|
|
|
/* Our cost must be kept in sync with
|
|
cgraph_estimate_size_after_inlining that does use function
|
|
declaration to figure out the arguments. */
|
|
if (decl && DECL_ARGUMENTS (decl))
|
|
{
|
|
tree arg;
|
|
for (arg = DECL_ARGUMENTS (decl); arg; arg = TREE_CHAIN (arg))
|
|
cost += estimate_move_cost (TREE_TYPE (arg));
|
|
}
|
|
else if (funtype && prototype_p (funtype))
|
|
{
|
|
tree t;
|
|
for (t = TYPE_ARG_TYPES (funtype); t; t = TREE_CHAIN (t))
|
|
cost += estimate_move_cost (TREE_VALUE (t));
|
|
}
|
|
else
|
|
{
|
|
for (i = 0; i < gimple_call_num_args (stmt); i++)
|
|
{
|
|
tree arg = gimple_call_arg (stmt, i);
|
|
cost += estimate_move_cost (TREE_TYPE (arg));
|
|
}
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
case GIMPLE_GOTO:
|
|
case GIMPLE_LABEL:
|
|
case GIMPLE_NOP:
|
|
case GIMPLE_PHI:
|
|
case GIMPLE_RETURN:
|
|
case GIMPLE_CHANGE_DYNAMIC_TYPE:
|
|
case GIMPLE_PREDICT:
|
|
return 0;
|
|
|
|
case GIMPLE_ASM:
|
|
case GIMPLE_RESX:
|
|
return 1;
|
|
|
|
case GIMPLE_BIND:
|
|
return estimate_num_insns_seq (gimple_bind_body (stmt), weights);
|
|
|
|
case GIMPLE_EH_FILTER:
|
|
return estimate_num_insns_seq (gimple_eh_filter_failure (stmt), weights);
|
|
|
|
case GIMPLE_CATCH:
|
|
return estimate_num_insns_seq (gimple_catch_handler (stmt), weights);
|
|
|
|
case GIMPLE_TRY:
|
|
return (estimate_num_insns_seq (gimple_try_eval (stmt), weights)
|
|
+ estimate_num_insns_seq (gimple_try_cleanup (stmt), weights));
|
|
|
|
/* OpenMP directives are generally very expensive. */
|
|
|
|
case GIMPLE_OMP_RETURN:
|
|
case GIMPLE_OMP_SECTIONS_SWITCH:
|
|
case GIMPLE_OMP_ATOMIC_STORE:
|
|
case GIMPLE_OMP_CONTINUE:
|
|
/* ...except these, which are cheap. */
|
|
return 0;
|
|
|
|
case GIMPLE_OMP_ATOMIC_LOAD:
|
|
return weights->omp_cost;
|
|
|
|
case GIMPLE_OMP_FOR:
|
|
return (weights->omp_cost
|
|
+ estimate_num_insns_seq (gimple_omp_body (stmt), weights)
|
|
+ estimate_num_insns_seq (gimple_omp_for_pre_body (stmt), weights));
|
|
|
|
case GIMPLE_OMP_PARALLEL:
|
|
case GIMPLE_OMP_TASK:
|
|
case GIMPLE_OMP_CRITICAL:
|
|
case GIMPLE_OMP_MASTER:
|
|
case GIMPLE_OMP_ORDERED:
|
|
case GIMPLE_OMP_SECTION:
|
|
case GIMPLE_OMP_SECTIONS:
|
|
case GIMPLE_OMP_SINGLE:
|
|
return (weights->omp_cost
|
|
+ estimate_num_insns_seq (gimple_omp_body (stmt), weights));
|
|
|
|
default:
|
|
gcc_unreachable ();
|
|
}
|
|
|
|
return cost;
|
|
}
|
|
|
|
/* Estimate number of instructions that will be created by expanding
|
|
function FNDECL. WEIGHTS contains weights attributed to various
|
|
constructs. */
|
|
|
|
int
|
|
estimate_num_insns_fn (tree fndecl, eni_weights *weights)
|
|
{
|
|
struct function *my_function = DECL_STRUCT_FUNCTION (fndecl);
|
|
gimple_stmt_iterator bsi;
|
|
basic_block bb;
|
|
int n = 0;
|
|
|
|
gcc_assert (my_function && my_function->cfg);
|
|
FOR_EACH_BB_FN (bb, my_function)
|
|
{
|
|
for (bsi = gsi_start_bb (bb); !gsi_end_p (bsi); gsi_next (&bsi))
|
|
n += estimate_num_insns (gsi_stmt (bsi), weights);
|
|
}
|
|
|
|
return n;
|
|
}
|
|
|
|
|
|
/* Initializes weights used by estimate_num_insns. */
|
|
|
|
void
|
|
init_inline_once (void)
|
|
{
|
|
eni_inlining_weights.call_cost = PARAM_VALUE (PARAM_INLINE_CALL_COST);
|
|
eni_inlining_weights.target_builtin_call_cost = 1;
|
|
eni_inlining_weights.div_mod_cost = 10;
|
|
eni_inlining_weights.omp_cost = 40;
|
|
|
|
eni_size_weights.call_cost = 1;
|
|
eni_size_weights.target_builtin_call_cost = 1;
|
|
eni_size_weights.div_mod_cost = 1;
|
|
eni_size_weights.omp_cost = 40;
|
|
|
|
/* Estimating time for call is difficult, since we have no idea what the
|
|
called function does. In the current uses of eni_time_weights,
|
|
underestimating the cost does less harm than overestimating it, so
|
|
we choose a rather small value here. */
|
|
eni_time_weights.call_cost = 10;
|
|
eni_time_weights.target_builtin_call_cost = 10;
|
|
eni_time_weights.div_mod_cost = 10;
|
|
eni_time_weights.omp_cost = 40;
|
|
}
|
|
|
|
/* Estimate the number of instructions in a gimple_seq. */
|
|
|
|
int
|
|
count_insns_seq (gimple_seq seq, eni_weights *weights)
|
|
{
|
|
gimple_stmt_iterator gsi;
|
|
int n = 0;
|
|
for (gsi = gsi_start (seq); !gsi_end_p (gsi); gsi_next (&gsi))
|
|
n += estimate_num_insns (gsi_stmt (gsi), weights);
|
|
|
|
return n;
|
|
}
|
|
|
|
|
|
/* Install new lexical TREE_BLOCK underneath 'current_block'. */
|
|
|
|
static void
|
|
prepend_lexical_block (tree current_block, tree new_block)
|
|
{
|
|
BLOCK_CHAIN (new_block) = BLOCK_SUBBLOCKS (current_block);
|
|
BLOCK_SUBBLOCKS (current_block) = new_block;
|
|
BLOCK_SUPERCONTEXT (new_block) = current_block;
|
|
}
|
|
|
|
/* Fetch callee declaration from the call graph edge going from NODE and
|
|
associated with STMR call statement. Return NULL_TREE if not found. */
|
|
static tree
|
|
get_indirect_callee_fndecl (struct cgraph_node *node, gimple stmt)
|
|
{
|
|
struct cgraph_edge *cs;
|
|
|
|
cs = cgraph_edge (node, stmt);
|
|
if (cs)
|
|
return cs->callee->decl;
|
|
|
|
return NULL_TREE;
|
|
}
|
|
|
|
/* If STMT is a GIMPLE_CALL, replace it with its inline expansion. */
|
|
|
|
static bool
|
|
expand_call_inline (basic_block bb, gimple stmt, copy_body_data *id)
|
|
{
|
|
tree retvar, use_retvar;
|
|
tree fn;
|
|
struct pointer_map_t *st;
|
|
tree return_slot;
|
|
tree modify_dest;
|
|
location_t saved_location;
|
|
struct cgraph_edge *cg_edge;
|
|
cgraph_inline_failed_t reason;
|
|
basic_block return_block;
|
|
edge e;
|
|
gimple_stmt_iterator gsi, stmt_gsi;
|
|
bool successfully_inlined = FALSE;
|
|
bool purge_dead_abnormal_edges;
|
|
tree t_step;
|
|
tree var;
|
|
|
|
/* Set input_location here so we get the right instantiation context
|
|
if we call instantiate_decl from inlinable_function_p. */
|
|
saved_location = input_location;
|
|
if (gimple_has_location (stmt))
|
|
input_location = gimple_location (stmt);
|
|
|
|
/* From here on, we're only interested in CALL_EXPRs. */
|
|
if (gimple_code (stmt) != GIMPLE_CALL)
|
|
goto egress;
|
|
|
|
/* First, see if we can figure out what function is being called.
|
|
If we cannot, then there is no hope of inlining the function. */
|
|
fn = gimple_call_fndecl (stmt);
|
|
if (!fn)
|
|
{
|
|
fn = get_indirect_callee_fndecl (id->dst_node, stmt);
|
|
if (!fn)
|
|
goto egress;
|
|
}
|
|
|
|
/* Turn forward declarations into real ones. */
|
|
fn = cgraph_node (fn)->decl;
|
|
|
|
/* If FN is a declaration of a function in a nested scope that was
|
|
globally declared inline, we don't set its DECL_INITIAL.
|
|
However, we can't blindly follow DECL_ABSTRACT_ORIGIN because the
|
|
C++ front-end uses it for cdtors to refer to their internal
|
|
declarations, that are not real functions. Fortunately those
|
|
don't have trees to be saved, so we can tell by checking their
|
|
gimple_body. */
|
|
if (!DECL_INITIAL (fn)
|
|
&& DECL_ABSTRACT_ORIGIN (fn)
|
|
&& gimple_has_body_p (DECL_ABSTRACT_ORIGIN (fn)))
|
|
fn = DECL_ABSTRACT_ORIGIN (fn);
|
|
|
|
/* Objective C and fortran still calls tree_rest_of_compilation directly.
|
|
Kill this check once this is fixed. */
|
|
if (!id->dst_node->analyzed)
|
|
goto egress;
|
|
|
|
cg_edge = cgraph_edge (id->dst_node, stmt);
|
|
|
|
/* Constant propagation on argument done during previous inlining
|
|
may create new direct call. Produce an edge for it. */
|
|
if (!cg_edge)
|
|
{
|
|
struct cgraph_node *dest = cgraph_node (fn);
|
|
|
|
/* We have missing edge in the callgraph. This can happen in one case
|
|
where previous inlining turned indirect call into direct call by
|
|
constant propagating arguments. In all other cases we hit a bug
|
|
(incorrect node sharing is most common reason for missing edges. */
|
|
gcc_assert (dest->needed);
|
|
cgraph_create_edge (id->dst_node, dest, stmt,
|
|
bb->count, CGRAPH_FREQ_BASE,
|
|
bb->loop_depth)->inline_failed
|
|
= CIF_ORIGINALLY_INDIRECT_CALL;
|
|
if (dump_file)
|
|
{
|
|
fprintf (dump_file, "Created new direct edge to %s",
|
|
cgraph_node_name (dest));
|
|
}
|
|
goto egress;
|
|
}
|
|
|
|
/* Don't try to inline functions that are not well-suited to
|
|
inlining. */
|
|
if (!cgraph_inline_p (cg_edge, &reason))
|
|
{
|
|
/* If this call was originally indirect, we do not want to emit any
|
|
inlining related warnings or sorry messages because there are no
|
|
guarantees regarding those. */
|
|
if (cg_edge->indirect_call)
|
|
goto egress;
|
|
|
|
if (lookup_attribute ("always_inline", DECL_ATTRIBUTES (fn))
|
|
/* Avoid warnings during early inline pass. */
|
|
&& cgraph_global_info_ready)
|
|
{
|
|
sorry ("inlining failed in call to %q+F: %s", fn,
|
|
cgraph_inline_failed_string (reason));
|
|
sorry ("called from here");
|
|
}
|
|
else if (warn_inline && DECL_DECLARED_INLINE_P (fn)
|
|
&& !DECL_IN_SYSTEM_HEADER (fn)
|
|
&& reason != CIF_UNSPECIFIED
|
|
&& !lookup_attribute ("noinline", DECL_ATTRIBUTES (fn))
|
|
/* Avoid warnings during early inline pass. */
|
|
&& cgraph_global_info_ready)
|
|
{
|
|
warning (OPT_Winline, "inlining failed in call to %q+F: %s",
|
|
fn, cgraph_inline_failed_string (reason));
|
|
warning (OPT_Winline, "called from here");
|
|
}
|
|
goto egress;
|
|
}
|
|
fn = cg_edge->callee->decl;
|
|
|
|
#ifdef ENABLE_CHECKING
|
|
if (cg_edge->callee->decl != id->dst_node->decl)
|
|
verify_cgraph_node (cg_edge->callee);
|
|
#endif
|
|
|
|
/* We will be inlining this callee. */
|
|
id->eh_region = lookup_stmt_eh_region (stmt);
|
|
|
|
/* Split the block holding the GIMPLE_CALL. */
|
|
e = split_block (bb, stmt);
|
|
bb = e->src;
|
|
return_block = e->dest;
|
|
remove_edge (e);
|
|
|
|
/* split_block splits after the statement; work around this by
|
|
moving the call into the second block manually. Not pretty,
|
|
but seems easier than doing the CFG manipulation by hand
|
|
when the GIMPLE_CALL is in the last statement of BB. */
|
|
stmt_gsi = gsi_last_bb (bb);
|
|
gsi_remove (&stmt_gsi, false);
|
|
|
|
/* If the GIMPLE_CALL was in the last statement of BB, it may have
|
|
been the source of abnormal edges. In this case, schedule
|
|
the removal of dead abnormal edges. */
|
|
gsi = gsi_start_bb (return_block);
|
|
if (gsi_end_p (gsi))
|
|
{
|
|
gsi_insert_after (&gsi, stmt, GSI_NEW_STMT);
|
|
purge_dead_abnormal_edges = true;
|
|
}
|
|
else
|
|
{
|
|
gsi_insert_before (&gsi, stmt, GSI_NEW_STMT);
|
|
purge_dead_abnormal_edges = false;
|
|
}
|
|
|
|
stmt_gsi = gsi_start_bb (return_block);
|
|
|
|
/* Build a block containing code to initialize the arguments, the
|
|
actual inline expansion of the body, and a label for the return
|
|
statements within the function to jump to. The type of the
|
|
statement expression is the return type of the function call. */
|
|
id->block = make_node (BLOCK);
|
|
BLOCK_ABSTRACT_ORIGIN (id->block) = fn;
|
|
BLOCK_SOURCE_LOCATION (id->block) = input_location;
|
|
prepend_lexical_block (gimple_block (stmt), id->block);
|
|
|
|
/* Local declarations will be replaced by their equivalents in this
|
|
map. */
|
|
st = id->decl_map;
|
|
id->decl_map = pointer_map_create ();
|
|
|
|
/* Record the function we are about to inline. */
|
|
id->src_fn = fn;
|
|
id->src_node = cg_edge->callee;
|
|
id->src_cfun = DECL_STRUCT_FUNCTION (fn);
|
|
id->gimple_call = stmt;
|
|
|
|
gcc_assert (!id->src_cfun->after_inlining);
|
|
|
|
id->entry_bb = bb;
|
|
if (lookup_attribute ("cold", DECL_ATTRIBUTES (fn)))
|
|
{
|
|
gimple_stmt_iterator si = gsi_last_bb (bb);
|
|
gsi_insert_after (&si, gimple_build_predict (PRED_COLD_FUNCTION,
|
|
NOT_TAKEN),
|
|
GSI_NEW_STMT);
|
|
}
|
|
initialize_inlined_parameters (id, stmt, fn, bb);
|
|
|
|
if (DECL_INITIAL (fn))
|
|
prepend_lexical_block (id->block, remap_blocks (DECL_INITIAL (fn), id));
|
|
|
|
/* Return statements in the function body will be replaced by jumps
|
|
to the RET_LABEL. */
|
|
gcc_assert (DECL_INITIAL (fn));
|
|
gcc_assert (TREE_CODE (DECL_INITIAL (fn)) == BLOCK);
|
|
|
|
/* Find the LHS to which the result of this call is assigned. */
|
|
return_slot = NULL;
|
|
if (gimple_call_lhs (stmt))
|
|
{
|
|
modify_dest = gimple_call_lhs (stmt);
|
|
|
|
/* The function which we are inlining might not return a value,
|
|
in which case we should issue a warning that the function
|
|
does not return a value. In that case the optimizers will
|
|
see that the variable to which the value is assigned was not
|
|
initialized. We do not want to issue a warning about that
|
|
uninitialized variable. */
|
|
if (DECL_P (modify_dest))
|
|
TREE_NO_WARNING (modify_dest) = 1;
|
|
|
|
if (gimple_call_return_slot_opt_p (stmt))
|
|
{
|
|
return_slot = modify_dest;
|
|
modify_dest = NULL;
|
|
}
|
|
}
|
|
else
|
|
modify_dest = NULL;
|
|
|
|
/* If we are inlining a call to the C++ operator new, we don't want
|
|
to use type based alias analysis on the return value. Otherwise
|
|
we may get confused if the compiler sees that the inlined new
|
|
function returns a pointer which was just deleted. See bug
|
|
33407. */
|
|
if (DECL_IS_OPERATOR_NEW (fn))
|
|
{
|
|
return_slot = NULL;
|
|
modify_dest = NULL;
|
|
}
|
|
|
|
/* Declare the return variable for the function. */
|
|
retvar = declare_return_variable (id, return_slot, modify_dest, &use_retvar);
|
|
|
|
if (DECL_IS_OPERATOR_NEW (fn))
|
|
{
|
|
gcc_assert (TREE_CODE (retvar) == VAR_DECL
|
|
&& POINTER_TYPE_P (TREE_TYPE (retvar)));
|
|
DECL_NO_TBAA_P (retvar) = 1;
|
|
}
|
|
|
|
/* Add local vars in this inlined callee to caller. */
|
|
t_step = id->src_cfun->local_decls;
|
|
for (; t_step; t_step = TREE_CHAIN (t_step))
|
|
{
|
|
var = TREE_VALUE (t_step);
|
|
if (TREE_STATIC (var) && !TREE_ASM_WRITTEN (var))
|
|
{
|
|
if (var_ann (var) && add_referenced_var (var))
|
|
cfun->local_decls = tree_cons (NULL_TREE, var,
|
|
cfun->local_decls);
|
|
}
|
|
else if (!can_be_nonlocal (var, id))
|
|
cfun->local_decls = tree_cons (NULL_TREE, remap_decl (var, id),
|
|
cfun->local_decls);
|
|
}
|
|
|
|
/* This is it. Duplicate the callee body. Assume callee is
|
|
pre-gimplified. Note that we must not alter the caller
|
|
function in any way before this point, as this CALL_EXPR may be
|
|
a self-referential call; if we're calling ourselves, we need to
|
|
duplicate our body before altering anything. */
|
|
copy_body (id, bb->count, bb->frequency, bb, return_block);
|
|
|
|
/* Clean up. */
|
|
pointer_map_destroy (id->decl_map);
|
|
id->decl_map = st;
|
|
|
|
/* Unlink the calls virtual operands before replacing it. */
|
|
unlink_stmt_vdef (stmt);
|
|
|
|
/* If the inlined function returns a result that we care about,
|
|
substitute the GIMPLE_CALL with an assignment of the return
|
|
variable to the LHS of the call. That is, if STMT was
|
|
'a = foo (...)', substitute the call with 'a = USE_RETVAR'. */
|
|
if (use_retvar && gimple_call_lhs (stmt))
|
|
{
|
|
gimple old_stmt = stmt;
|
|
stmt = gimple_build_assign (gimple_call_lhs (stmt), use_retvar);
|
|
gsi_replace (&stmt_gsi, stmt, false);
|
|
if (gimple_in_ssa_p (cfun))
|
|
mark_symbols_for_renaming (stmt);
|
|
maybe_clean_or_replace_eh_stmt (old_stmt, stmt);
|
|
}
|
|
else
|
|
{
|
|
/* Handle the case of inlining a function with no return
|
|
statement, which causes the return value to become undefined. */
|
|
if (gimple_call_lhs (stmt)
|
|
&& TREE_CODE (gimple_call_lhs (stmt)) == SSA_NAME)
|
|
{
|
|
tree name = gimple_call_lhs (stmt);
|
|
tree var = SSA_NAME_VAR (name);
|
|
tree def = gimple_default_def (cfun, var);
|
|
|
|
if (def)
|
|
{
|
|
/* If the variable is used undefined, make this name
|
|
undefined via a move. */
|
|
stmt = gimple_build_assign (gimple_call_lhs (stmt), def);
|
|
gsi_replace (&stmt_gsi, stmt, true);
|
|
}
|
|
else
|
|
{
|
|
/* Otherwise make this variable undefined. */
|
|
gsi_remove (&stmt_gsi, true);
|
|
set_default_def (var, name);
|
|
SSA_NAME_DEF_STMT (name) = gimple_build_nop ();
|
|
}
|
|
}
|
|
else
|
|
gsi_remove (&stmt_gsi, true);
|
|
}
|
|
|
|
if (purge_dead_abnormal_edges)
|
|
gimple_purge_dead_abnormal_call_edges (return_block);
|
|
|
|
/* If the value of the new expression is ignored, that's OK. We
|
|
don't warn about this for CALL_EXPRs, so we shouldn't warn about
|
|
the equivalent inlined version either. */
|
|
if (is_gimple_assign (stmt))
|
|
{
|
|
gcc_assert (gimple_assign_single_p (stmt)
|
|
|| CONVERT_EXPR_CODE_P (gimple_assign_rhs_code (stmt)));
|
|
TREE_USED (gimple_assign_rhs1 (stmt)) = 1;
|
|
}
|
|
|
|
/* Output the inlining info for this abstract function, since it has been
|
|
inlined. If we don't do this now, we can lose the information about the
|
|
variables in the function when the blocks get blown away as soon as we
|
|
remove the cgraph node. */
|
|
(*debug_hooks->outlining_inline_function) (cg_edge->callee->decl);
|
|
|
|
/* Update callgraph if needed. */
|
|
cgraph_remove_node (cg_edge->callee);
|
|
|
|
id->block = NULL_TREE;
|
|
successfully_inlined = TRUE;
|
|
|
|
egress:
|
|
input_location = saved_location;
|
|
return successfully_inlined;
|
|
}
|
|
|
|
/* Expand call statements reachable from STMT_P.
|
|
We can only have CALL_EXPRs as the "toplevel" tree code or nested
|
|
in a MODIFY_EXPR. See tree-gimple.c:get_call_expr_in(). We can
|
|
unfortunately not use that function here because we need a pointer
|
|
to the CALL_EXPR, not the tree itself. */
|
|
|
|
static bool
|
|
gimple_expand_calls_inline (basic_block bb, copy_body_data *id)
|
|
{
|
|
gimple_stmt_iterator gsi;
|
|
|
|
for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi))
|
|
{
|
|
gimple stmt = gsi_stmt (gsi);
|
|
|
|
if (is_gimple_call (stmt)
|
|
&& expand_call_inline (bb, stmt, id))
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
|
|
/* Walk all basic blocks created after FIRST and try to fold every statement
|
|
in the STATEMENTS pointer set. */
|
|
|
|
static void
|
|
fold_marked_statements (int first, struct pointer_set_t *statements)
|
|
{
|
|
for (; first < n_basic_blocks; first++)
|
|
if (BASIC_BLOCK (first))
|
|
{
|
|
gimple_stmt_iterator gsi;
|
|
|
|
for (gsi = gsi_start_bb (BASIC_BLOCK (first));
|
|
!gsi_end_p (gsi);
|
|
gsi_next (&gsi))
|
|
if (pointer_set_contains (statements, gsi_stmt (gsi)))
|
|
{
|
|
gimple old_stmt = gsi_stmt (gsi);
|
|
|
|
if (fold_stmt (&gsi))
|
|
{
|
|
/* Re-read the statement from GSI as fold_stmt() may
|
|
have changed it. */
|
|
gimple new_stmt = gsi_stmt (gsi);
|
|
update_stmt (new_stmt);
|
|
|
|
if (is_gimple_call (old_stmt))
|
|
cgraph_update_edges_for_call_stmt (old_stmt, new_stmt);
|
|
|
|
if (maybe_clean_or_replace_eh_stmt (old_stmt, new_stmt))
|
|
gimple_purge_dead_eh_edges (BASIC_BLOCK (first));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Return true if BB has at least one abnormal outgoing edge. */
|
|
|
|
static inline bool
|
|
has_abnormal_outgoing_edge_p (basic_block bb)
|
|
{
|
|
edge e;
|
|
edge_iterator ei;
|
|
|
|
FOR_EACH_EDGE (e, ei, bb->succs)
|
|
if (e->flags & EDGE_ABNORMAL)
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
/* Expand calls to inline functions in the body of FN. */
|
|
|
|
unsigned int
|
|
optimize_inline_calls (tree fn)
|
|
{
|
|
copy_body_data id;
|
|
tree prev_fn;
|
|
basic_block bb;
|
|
int last = n_basic_blocks;
|
|
struct gimplify_ctx gctx;
|
|
|
|
/* There is no point in performing inlining if errors have already
|
|
occurred -- and we might crash if we try to inline invalid
|
|
code. */
|
|
if (errorcount || sorrycount)
|
|
return 0;
|
|
|
|
/* Clear out ID. */
|
|
memset (&id, 0, sizeof (id));
|
|
|
|
id.src_node = id.dst_node = cgraph_node (fn);
|
|
id.dst_fn = fn;
|
|
/* Or any functions that aren't finished yet. */
|
|
prev_fn = NULL_TREE;
|
|
if (current_function_decl)
|
|
{
|
|
id.dst_fn = current_function_decl;
|
|
prev_fn = current_function_decl;
|
|
}
|
|
|
|
id.copy_decl = copy_decl_maybe_to_var;
|
|
id.transform_call_graph_edges = CB_CGE_DUPLICATE;
|
|
id.transform_new_cfg = false;
|
|
id.transform_return_to_modify = true;
|
|
id.transform_lang_insert_block = NULL;
|
|
id.statements_to_fold = pointer_set_create ();
|
|
|
|
push_gimplify_context (&gctx);
|
|
|
|
/* We make no attempts to keep dominance info up-to-date. */
|
|
free_dominance_info (CDI_DOMINATORS);
|
|
free_dominance_info (CDI_POST_DOMINATORS);
|
|
|
|
/* Register specific gimple functions. */
|
|
gimple_register_cfg_hooks ();
|
|
|
|
/* Reach the trees by walking over the CFG, and note the
|
|
enclosing basic-blocks in the call edges. */
|
|
/* We walk the blocks going forward, because inlined function bodies
|
|
will split id->current_basic_block, and the new blocks will
|
|
follow it; we'll trudge through them, processing their CALL_EXPRs
|
|
along the way. */
|
|
FOR_EACH_BB (bb)
|
|
gimple_expand_calls_inline (bb, &id);
|
|
|
|
pop_gimplify_context (NULL);
|
|
|
|
#ifdef ENABLE_CHECKING
|
|
{
|
|
struct cgraph_edge *e;
|
|
|
|
verify_cgraph_node (id.dst_node);
|
|
|
|
/* Double check that we inlined everything we are supposed to inline. */
|
|
for (e = id.dst_node->callees; e; e = e->next_callee)
|
|
gcc_assert (e->inline_failed);
|
|
}
|
|
#endif
|
|
|
|
/* Fold the statements before compacting/renumbering the basic blocks. */
|
|
fold_marked_statements (last, id.statements_to_fold);
|
|
pointer_set_destroy (id.statements_to_fold);
|
|
|
|
/* Renumber the (code) basic_blocks consecutively. */
|
|
compact_blocks ();
|
|
/* Renumber the lexical scoping (non-code) blocks consecutively. */
|
|
number_blocks (fn);
|
|
|
|
fold_cond_expr_cond ();
|
|
|
|
/* It would be nice to check SSA/CFG/statement consistency here, but it is
|
|
not possible yet - the IPA passes might make various functions to not
|
|
throw and they don't care to proactively update local EH info. This is
|
|
done later in fixup_cfg pass that also execute the verification. */
|
|
return (TODO_update_ssa
|
|
| TODO_cleanup_cfg
|
|
| (gimple_in_ssa_p (cfun) ? TODO_remove_unused_locals : 0)
|
|
| (profile_status != PROFILE_ABSENT ? TODO_rebuild_frequencies : 0));
|
|
}
|
|
|
|
/* Passed to walk_tree. Copies the node pointed to, if appropriate. */
|
|
|
|
tree
|
|
copy_tree_r (tree *tp, int *walk_subtrees, void *data ATTRIBUTE_UNUSED)
|
|
{
|
|
enum tree_code code = TREE_CODE (*tp);
|
|
enum tree_code_class cl = TREE_CODE_CLASS (code);
|
|
|
|
/* We make copies of most nodes. */
|
|
if (IS_EXPR_CODE_CLASS (cl)
|
|
|| code == TREE_LIST
|
|
|| code == TREE_VEC
|
|
|| code == TYPE_DECL
|
|
|| code == OMP_CLAUSE)
|
|
{
|
|
/* Because the chain gets clobbered when we make a copy, we save it
|
|
here. */
|
|
tree chain = NULL_TREE, new_tree;
|
|
|
|
chain = TREE_CHAIN (*tp);
|
|
|
|
/* Copy the node. */
|
|
new_tree = copy_node (*tp);
|
|
|
|
/* Propagate mudflap marked-ness. */
|
|
if (flag_mudflap && mf_marked_p (*tp))
|
|
mf_mark (new_tree);
|
|
|
|
*tp = new_tree;
|
|
|
|
/* Now, restore the chain, if appropriate. That will cause
|
|
walk_tree to walk into the chain as well. */
|
|
if (code == PARM_DECL
|
|
|| code == TREE_LIST
|
|
|| code == OMP_CLAUSE)
|
|
TREE_CHAIN (*tp) = chain;
|
|
|
|
/* For now, we don't update BLOCKs when we make copies. So, we
|
|
have to nullify all BIND_EXPRs. */
|
|
if (TREE_CODE (*tp) == BIND_EXPR)
|
|
BIND_EXPR_BLOCK (*tp) = NULL_TREE;
|
|
}
|
|
else if (code == CONSTRUCTOR)
|
|
{
|
|
/* CONSTRUCTOR nodes need special handling because
|
|
we need to duplicate the vector of elements. */
|
|
tree new_tree;
|
|
|
|
new_tree = copy_node (*tp);
|
|
|
|
/* Propagate mudflap marked-ness. */
|
|
if (flag_mudflap && mf_marked_p (*tp))
|
|
mf_mark (new_tree);
|
|
|
|
CONSTRUCTOR_ELTS (new_tree) = VEC_copy (constructor_elt, gc,
|
|
CONSTRUCTOR_ELTS (*tp));
|
|
*tp = new_tree;
|
|
}
|
|
else if (TREE_CODE_CLASS (code) == tcc_type)
|
|
*walk_subtrees = 0;
|
|
else if (TREE_CODE_CLASS (code) == tcc_declaration)
|
|
*walk_subtrees = 0;
|
|
else if (TREE_CODE_CLASS (code) == tcc_constant)
|
|
*walk_subtrees = 0;
|
|
else
|
|
gcc_assert (code != STATEMENT_LIST);
|
|
return NULL_TREE;
|
|
}
|
|
|
|
/* The SAVE_EXPR pointed to by TP is being copied. If ST contains
|
|
information indicating to what new SAVE_EXPR this one should be mapped,
|
|
use that one. Otherwise, create a new node and enter it in ST. FN is
|
|
the function into which the copy will be placed. */
|
|
|
|
static void
|
|
remap_save_expr (tree *tp, void *st_, int *walk_subtrees)
|
|
{
|
|
struct pointer_map_t *st = (struct pointer_map_t *) st_;
|
|
tree *n;
|
|
tree t;
|
|
|
|
/* See if we already encountered this SAVE_EXPR. */
|
|
n = (tree *) pointer_map_contains (st, *tp);
|
|
|
|
/* If we didn't already remap this SAVE_EXPR, do so now. */
|
|
if (!n)
|
|
{
|
|
t = copy_node (*tp);
|
|
|
|
/* Remember this SAVE_EXPR. */
|
|
*pointer_map_insert (st, *tp) = t;
|
|
/* Make sure we don't remap an already-remapped SAVE_EXPR. */
|
|
*pointer_map_insert (st, t) = t;
|
|
}
|
|
else
|
|
{
|
|
/* We've already walked into this SAVE_EXPR; don't do it again. */
|
|
*walk_subtrees = 0;
|
|
t = *n;
|
|
}
|
|
|
|
/* Replace this SAVE_EXPR with the copy. */
|
|
*tp = t;
|
|
}
|
|
|
|
/* Called via walk_tree. If *TP points to a DECL_STMT for a local label,
|
|
copies the declaration and enters it in the splay_tree in DATA (which is
|
|
really an `copy_body_data *'). */
|
|
|
|
static tree
|
|
mark_local_for_remap_r (tree *tp, int *walk_subtrees ATTRIBUTE_UNUSED,
|
|
void *data)
|
|
{
|
|
copy_body_data *id = (copy_body_data *) data;
|
|
|
|
/* Don't walk into types. */
|
|
if (TYPE_P (*tp))
|
|
*walk_subtrees = 0;
|
|
|
|
else if (TREE_CODE (*tp) == LABEL_EXPR)
|
|
{
|
|
tree decl = TREE_OPERAND (*tp, 0);
|
|
|
|
/* Copy the decl and remember the copy. */
|
|
insert_decl_map (id, decl, id->copy_decl (decl, id));
|
|
}
|
|
|
|
return NULL_TREE;
|
|
}
|
|
|
|
/* Perform any modifications to EXPR required when it is unsaved. Does
|
|
not recurse into EXPR's subtrees. */
|
|
|
|
static void
|
|
unsave_expr_1 (tree expr)
|
|
{
|
|
switch (TREE_CODE (expr))
|
|
{
|
|
case TARGET_EXPR:
|
|
/* Don't mess with a TARGET_EXPR that hasn't been expanded.
|
|
It's OK for this to happen if it was part of a subtree that
|
|
isn't immediately expanded, such as operand 2 of another
|
|
TARGET_EXPR. */
|
|
if (TREE_OPERAND (expr, 1))
|
|
break;
|
|
|
|
TREE_OPERAND (expr, 1) = TREE_OPERAND (expr, 3);
|
|
TREE_OPERAND (expr, 3) = NULL_TREE;
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Called via walk_tree when an expression is unsaved. Using the
|
|
splay_tree pointed to by ST (which is really a `splay_tree'),
|
|
remaps all local declarations to appropriate replacements. */
|
|
|
|
static tree
|
|
unsave_r (tree *tp, int *walk_subtrees, void *data)
|
|
{
|
|
copy_body_data *id = (copy_body_data *) data;
|
|
struct pointer_map_t *st = id->decl_map;
|
|
tree *n;
|
|
|
|
/* Only a local declaration (variable or label). */
|
|
if ((TREE_CODE (*tp) == VAR_DECL && !TREE_STATIC (*tp))
|
|
|| TREE_CODE (*tp) == LABEL_DECL)
|
|
{
|
|
/* Lookup the declaration. */
|
|
n = (tree *) pointer_map_contains (st, *tp);
|
|
|
|
/* If it's there, remap it. */
|
|
if (n)
|
|
*tp = *n;
|
|
}
|
|
|
|
else if (TREE_CODE (*tp) == STATEMENT_LIST)
|
|
gcc_unreachable ();
|
|
else if (TREE_CODE (*tp) == BIND_EXPR)
|
|
copy_bind_expr (tp, walk_subtrees, id);
|
|
else if (TREE_CODE (*tp) == SAVE_EXPR)
|
|
remap_save_expr (tp, st, walk_subtrees);
|
|
else
|
|
{
|
|
copy_tree_r (tp, walk_subtrees, NULL);
|
|
|
|
/* Do whatever unsaving is required. */
|
|
unsave_expr_1 (*tp);
|
|
}
|
|
|
|
/* Keep iterating. */
|
|
return NULL_TREE;
|
|
}
|
|
|
|
/* Copies everything in EXPR and replaces variables, labels
|
|
and SAVE_EXPRs local to EXPR. */
|
|
|
|
tree
|
|
unsave_expr_now (tree expr)
|
|
{
|
|
copy_body_data id;
|
|
|
|
/* There's nothing to do for NULL_TREE. */
|
|
if (expr == 0)
|
|
return expr;
|
|
|
|
/* Set up ID. */
|
|
memset (&id, 0, sizeof (id));
|
|
id.src_fn = current_function_decl;
|
|
id.dst_fn = current_function_decl;
|
|
id.decl_map = pointer_map_create ();
|
|
|
|
id.copy_decl = copy_decl_no_change;
|
|
id.transform_call_graph_edges = CB_CGE_DUPLICATE;
|
|
id.transform_new_cfg = false;
|
|
id.transform_return_to_modify = false;
|
|
id.transform_lang_insert_block = NULL;
|
|
|
|
/* Walk the tree once to find local labels. */
|
|
walk_tree_without_duplicates (&expr, mark_local_for_remap_r, &id);
|
|
|
|
/* Walk the tree again, copying, remapping, and unsaving. */
|
|
walk_tree (&expr, unsave_r, &id, NULL);
|
|
|
|
/* Clean up. */
|
|
pointer_map_destroy (id.decl_map);
|
|
|
|
return expr;
|
|
}
|
|
|
|
/* Called via walk_gimple_seq. If *GSIP points to a GIMPLE_LABEL for a local
|
|
label, copies the declaration and enters it in the splay_tree in DATA (which
|
|
is really a 'copy_body_data *'. */
|
|
|
|
static tree
|
|
mark_local_labels_stmt (gimple_stmt_iterator *gsip,
|
|
bool *handled_ops_p ATTRIBUTE_UNUSED,
|
|
struct walk_stmt_info *wi)
|
|
{
|
|
copy_body_data *id = (copy_body_data *) wi->info;
|
|
gimple stmt = gsi_stmt (*gsip);
|
|
|
|
if (gimple_code (stmt) == GIMPLE_LABEL)
|
|
{
|
|
tree decl = gimple_label_label (stmt);
|
|
|
|
/* Copy the decl and remember the copy. */
|
|
insert_decl_map (id, decl, id->copy_decl (decl, id));
|
|
}
|
|
|
|
return NULL_TREE;
|
|
}
|
|
|
|
|
|
/* Called via walk_gimple_seq by copy_gimple_seq_and_replace_local.
|
|
Using the splay_tree pointed to by ST (which is really a `splay_tree'),
|
|
remaps all local declarations to appropriate replacements in gimple
|
|
operands. */
|
|
|
|
static tree
|
|
replace_locals_op (tree *tp, int *walk_subtrees, void *data)
|
|
{
|
|
struct walk_stmt_info *wi = (struct walk_stmt_info*) data;
|
|
copy_body_data *id = (copy_body_data *) wi->info;
|
|
struct pointer_map_t *st = id->decl_map;
|
|
tree *n;
|
|
tree expr = *tp;
|
|
|
|
/* Only a local declaration (variable or label). */
|
|
if ((TREE_CODE (expr) == VAR_DECL
|
|
&& !TREE_STATIC (expr))
|
|
|| TREE_CODE (expr) == LABEL_DECL)
|
|
{
|
|
/* Lookup the declaration. */
|
|
n = (tree *) pointer_map_contains (st, expr);
|
|
|
|
/* If it's there, remap it. */
|
|
if (n)
|
|
*tp = *n;
|
|
*walk_subtrees = 0;
|
|
}
|
|
else if (TREE_CODE (expr) == STATEMENT_LIST
|
|
|| TREE_CODE (expr) == BIND_EXPR
|
|
|| TREE_CODE (expr) == SAVE_EXPR)
|
|
gcc_unreachable ();
|
|
else if (TREE_CODE (expr) == TARGET_EXPR)
|
|
{
|
|
/* Don't mess with a TARGET_EXPR that hasn't been expanded.
|
|
It's OK for this to happen if it was part of a subtree that
|
|
isn't immediately expanded, such as operand 2 of another
|
|
TARGET_EXPR. */
|
|
if (!TREE_OPERAND (expr, 1))
|
|
{
|
|
TREE_OPERAND (expr, 1) = TREE_OPERAND (expr, 3);
|
|
TREE_OPERAND (expr, 3) = NULL_TREE;
|
|
}
|
|
}
|
|
|
|
/* Keep iterating. */
|
|
return NULL_TREE;
|
|
}
|
|
|
|
|
|
/* Called via walk_gimple_seq by copy_gimple_seq_and_replace_local.
|
|
Using the splay_tree pointed to by ST (which is really a `splay_tree'),
|
|
remaps all local declarations to appropriate replacements in gimple
|
|
statements. */
|
|
|
|
static tree
|
|
replace_locals_stmt (gimple_stmt_iterator *gsip,
|
|
bool *handled_ops_p ATTRIBUTE_UNUSED,
|
|
struct walk_stmt_info *wi)
|
|
{
|
|
copy_body_data *id = (copy_body_data *) wi->info;
|
|
gimple stmt = gsi_stmt (*gsip);
|
|
|
|
if (gimple_code (stmt) == GIMPLE_BIND)
|
|
{
|
|
tree block = gimple_bind_block (stmt);
|
|
|
|
if (block)
|
|
{
|
|
remap_block (&block, id);
|
|
gimple_bind_set_block (stmt, block);
|
|
}
|
|
|
|
/* This will remap a lot of the same decls again, but this should be
|
|
harmless. */
|
|
if (gimple_bind_vars (stmt))
|
|
gimple_bind_set_vars (stmt, remap_decls (gimple_bind_vars (stmt), NULL, id));
|
|
}
|
|
|
|
/* Keep iterating. */
|
|
return NULL_TREE;
|
|
}
|
|
|
|
|
|
/* Copies everything in SEQ and replaces variables and labels local to
|
|
current_function_decl. */
|
|
|
|
gimple_seq
|
|
copy_gimple_seq_and_replace_locals (gimple_seq seq)
|
|
{
|
|
copy_body_data id;
|
|
struct walk_stmt_info wi;
|
|
struct pointer_set_t *visited;
|
|
gimple_seq copy;
|
|
|
|
/* There's nothing to do for NULL_TREE. */
|
|
if (seq == NULL)
|
|
return seq;
|
|
|
|
/* Set up ID. */
|
|
memset (&id, 0, sizeof (id));
|
|
id.src_fn = current_function_decl;
|
|
id.dst_fn = current_function_decl;
|
|
id.decl_map = pointer_map_create ();
|
|
|
|
id.copy_decl = copy_decl_no_change;
|
|
id.transform_call_graph_edges = CB_CGE_DUPLICATE;
|
|
id.transform_new_cfg = false;
|
|
id.transform_return_to_modify = false;
|
|
id.transform_lang_insert_block = NULL;
|
|
|
|
/* Walk the tree once to find local labels. */
|
|
memset (&wi, 0, sizeof (wi));
|
|
visited = pointer_set_create ();
|
|
wi.info = &id;
|
|
wi.pset = visited;
|
|
walk_gimple_seq (seq, mark_local_labels_stmt, NULL, &wi);
|
|
pointer_set_destroy (visited);
|
|
|
|
copy = gimple_seq_copy (seq);
|
|
|
|
/* Walk the copy, remapping decls. */
|
|
memset (&wi, 0, sizeof (wi));
|
|
wi.info = &id;
|
|
walk_gimple_seq (copy, replace_locals_stmt, replace_locals_op, &wi);
|
|
|
|
/* Clean up. */
|
|
pointer_map_destroy (id.decl_map);
|
|
|
|
return copy;
|
|
}
|
|
|
|
|
|
/* Allow someone to determine if SEARCH is a child of TOP from gdb. */
|
|
|
|
static tree
|
|
debug_find_tree_1 (tree *tp, int *walk_subtrees ATTRIBUTE_UNUSED, void *data)
|
|
{
|
|
if (*tp == data)
|
|
return (tree) data;
|
|
else
|
|
return NULL;
|
|
}
|
|
|
|
bool
|
|
debug_find_tree (tree top, tree search)
|
|
{
|
|
return walk_tree_without_duplicates (&top, debug_find_tree_1, search) != 0;
|
|
}
|
|
|
|
|
|
/* Declare the variables created by the inliner. Add all the variables in
|
|
VARS to BIND_EXPR. */
|
|
|
|
static void
|
|
declare_inline_vars (tree block, tree vars)
|
|
{
|
|
tree t;
|
|
for (t = vars; t; t = TREE_CHAIN (t))
|
|
{
|
|
DECL_SEEN_IN_BIND_EXPR_P (t) = 1;
|
|
gcc_assert (!TREE_STATIC (t) && !TREE_ASM_WRITTEN (t));
|
|
cfun->local_decls = tree_cons (NULL_TREE, t, cfun->local_decls);
|
|
}
|
|
|
|
if (block)
|
|
BLOCK_VARS (block) = chainon (BLOCK_VARS (block), vars);
|
|
}
|
|
|
|
/* Copy NODE (which must be a DECL). The DECL originally was in the FROM_FN,
|
|
but now it will be in the TO_FN. PARM_TO_VAR means enable PARM_DECL to
|
|
VAR_DECL translation. */
|
|
|
|
static tree
|
|
copy_decl_for_dup_finish (copy_body_data *id, tree decl, tree copy)
|
|
{
|
|
/* Don't generate debug information for the copy if we wouldn't have
|
|
generated it for the copy either. */
|
|
DECL_ARTIFICIAL (copy) = DECL_ARTIFICIAL (decl);
|
|
DECL_IGNORED_P (copy) = DECL_IGNORED_P (decl);
|
|
|
|
/* Set the DECL_ABSTRACT_ORIGIN so the debugging routines know what
|
|
declaration inspired this copy. */
|
|
DECL_ABSTRACT_ORIGIN (copy) = DECL_ORIGIN (decl);
|
|
|
|
/* The new variable/label has no RTL, yet. */
|
|
if (CODE_CONTAINS_STRUCT (TREE_CODE (copy), TS_DECL_WRTL)
|
|
&& !TREE_STATIC (copy) && !DECL_EXTERNAL (copy))
|
|
SET_DECL_RTL (copy, NULL_RTX);
|
|
|
|
/* These args would always appear unused, if not for this. */
|
|
TREE_USED (copy) = 1;
|
|
|
|
/* Set the context for the new declaration. */
|
|
if (!DECL_CONTEXT (decl))
|
|
/* Globals stay global. */
|
|
;
|
|
else if (DECL_CONTEXT (decl) != id->src_fn)
|
|
/* Things that weren't in the scope of the function we're inlining
|
|
from aren't in the scope we're inlining to, either. */
|
|
;
|
|
else if (TREE_STATIC (decl))
|
|
/* Function-scoped static variables should stay in the original
|
|
function. */
|
|
;
|
|
else
|
|
/* Ordinary automatic local variables are now in the scope of the
|
|
new function. */
|
|
DECL_CONTEXT (copy) = id->dst_fn;
|
|
|
|
return copy;
|
|
}
|
|
|
|
static tree
|
|
copy_decl_to_var (tree decl, copy_body_data *id)
|
|
{
|
|
tree copy, type;
|
|
|
|
gcc_assert (TREE_CODE (decl) == PARM_DECL
|
|
|| TREE_CODE (decl) == RESULT_DECL);
|
|
|
|
type = TREE_TYPE (decl);
|
|
|
|
copy = build_decl (VAR_DECL, DECL_NAME (decl), type);
|
|
TREE_ADDRESSABLE (copy) = TREE_ADDRESSABLE (decl);
|
|
TREE_READONLY (copy) = TREE_READONLY (decl);
|
|
TREE_THIS_VOLATILE (copy) = TREE_THIS_VOLATILE (decl);
|
|
DECL_GIMPLE_REG_P (copy) = DECL_GIMPLE_REG_P (decl);
|
|
DECL_NO_TBAA_P (copy) = DECL_NO_TBAA_P (decl);
|
|
|
|
return copy_decl_for_dup_finish (id, decl, copy);
|
|
}
|
|
|
|
/* Like copy_decl_to_var, but create a return slot object instead of a
|
|
pointer variable for return by invisible reference. */
|
|
|
|
static tree
|
|
copy_result_decl_to_var (tree decl, copy_body_data *id)
|
|
{
|
|
tree copy, type;
|
|
|
|
gcc_assert (TREE_CODE (decl) == PARM_DECL
|
|
|| TREE_CODE (decl) == RESULT_DECL);
|
|
|
|
type = TREE_TYPE (decl);
|
|
if (DECL_BY_REFERENCE (decl))
|
|
type = TREE_TYPE (type);
|
|
|
|
copy = build_decl (VAR_DECL, DECL_NAME (decl), type);
|
|
TREE_READONLY (copy) = TREE_READONLY (decl);
|
|
TREE_THIS_VOLATILE (copy) = TREE_THIS_VOLATILE (decl);
|
|
if (!DECL_BY_REFERENCE (decl))
|
|
{
|
|
TREE_ADDRESSABLE (copy) = TREE_ADDRESSABLE (decl);
|
|
DECL_GIMPLE_REG_P (copy) = DECL_GIMPLE_REG_P (decl);
|
|
DECL_NO_TBAA_P (copy) = DECL_NO_TBAA_P (decl);
|
|
}
|
|
|
|
return copy_decl_for_dup_finish (id, decl, copy);
|
|
}
|
|
|
|
tree
|
|
copy_decl_no_change (tree decl, copy_body_data *id)
|
|
{
|
|
tree copy;
|
|
|
|
copy = copy_node (decl);
|
|
|
|
/* The COPY is not abstract; it will be generated in DST_FN. */
|
|
DECL_ABSTRACT (copy) = 0;
|
|
lang_hooks.dup_lang_specific_decl (copy);
|
|
|
|
/* TREE_ADDRESSABLE isn't used to indicate that a label's address has
|
|
been taken; it's for internal bookkeeping in expand_goto_internal. */
|
|
if (TREE_CODE (copy) == LABEL_DECL)
|
|
{
|
|
TREE_ADDRESSABLE (copy) = 0;
|
|
LABEL_DECL_UID (copy) = -1;
|
|
}
|
|
|
|
return copy_decl_for_dup_finish (id, decl, copy);
|
|
}
|
|
|
|
static tree
|
|
copy_decl_maybe_to_var (tree decl, copy_body_data *id)
|
|
{
|
|
if (TREE_CODE (decl) == PARM_DECL || TREE_CODE (decl) == RESULT_DECL)
|
|
return copy_decl_to_var (decl, id);
|
|
else
|
|
return copy_decl_no_change (decl, id);
|
|
}
|
|
|
|
/* Return a copy of the function's argument tree. */
|
|
static tree
|
|
copy_arguments_for_versioning (tree orig_parm, copy_body_data * id,
|
|
bitmap args_to_skip, tree *vars)
|
|
{
|
|
tree arg, *parg;
|
|
tree new_parm = NULL;
|
|
int i = 0;
|
|
|
|
parg = &new_parm;
|
|
|
|
for (arg = orig_parm; arg; arg = TREE_CHAIN (arg), i++)
|
|
if (!args_to_skip || !bitmap_bit_p (args_to_skip, i))
|
|
{
|
|
tree new_tree = remap_decl (arg, id);
|
|
lang_hooks.dup_lang_specific_decl (new_tree);
|
|
*parg = new_tree;
|
|
parg = &TREE_CHAIN (new_tree);
|
|
}
|
|
else if (!pointer_map_contains (id->decl_map, arg))
|
|
{
|
|
/* Make an equivalent VAR_DECL. If the argument was used
|
|
as temporary variable later in function, the uses will be
|
|
replaced by local variable. */
|
|
tree var = copy_decl_to_var (arg, id);
|
|
get_var_ann (var);
|
|
add_referenced_var (var);
|
|
insert_decl_map (id, arg, var);
|
|
/* Declare this new variable. */
|
|
TREE_CHAIN (var) = *vars;
|
|
*vars = var;
|
|
}
|
|
return new_parm;
|
|
}
|
|
|
|
/* Return a copy of the function's static chain. */
|
|
static tree
|
|
copy_static_chain (tree static_chain, copy_body_data * id)
|
|
{
|
|
tree *chain_copy, *pvar;
|
|
|
|
chain_copy = &static_chain;
|
|
for (pvar = chain_copy; *pvar; pvar = &TREE_CHAIN (*pvar))
|
|
{
|
|
tree new_tree = remap_decl (*pvar, id);
|
|
lang_hooks.dup_lang_specific_decl (new_tree);
|
|
TREE_CHAIN (new_tree) = TREE_CHAIN (*pvar);
|
|
*pvar = new_tree;
|
|
}
|
|
return static_chain;
|
|
}
|
|
|
|
/* Return true if the function is allowed to be versioned.
|
|
This is a guard for the versioning functionality. */
|
|
bool
|
|
tree_versionable_function_p (tree fndecl)
|
|
{
|
|
if (fndecl == NULL_TREE)
|
|
return false;
|
|
/* ??? There are cases where a function is
|
|
uninlinable but can be versioned. */
|
|
if (!tree_inlinable_function_p (fndecl))
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
/* Create a new name for omp child function. Returns an identifier. */
|
|
|
|
static GTY(()) unsigned int clone_fn_id_num;
|
|
|
|
static tree
|
|
clone_function_name (tree decl)
|
|
{
|
|
tree name = DECL_ASSEMBLER_NAME (decl);
|
|
size_t len = IDENTIFIER_LENGTH (name);
|
|
char *tmp_name, *prefix;
|
|
|
|
prefix = XALLOCAVEC (char, len + strlen ("_clone") + 1);
|
|
memcpy (prefix, IDENTIFIER_POINTER (name), len);
|
|
strcpy (prefix + len, "_clone");
|
|
#ifndef NO_DOT_IN_LABEL
|
|
prefix[len] = '.';
|
|
#elif !defined NO_DOLLAR_IN_LABEL
|
|
prefix[len] = '$';
|
|
#endif
|
|
ASM_FORMAT_PRIVATE_NAME (tmp_name, prefix, clone_fn_id_num++);
|
|
return get_identifier (tmp_name);
|
|
}
|
|
|
|
/* Create a copy of a function's tree.
|
|
OLD_DECL and NEW_DECL are FUNCTION_DECL tree nodes
|
|
of the original function and the new copied function
|
|
respectively. In case we want to replace a DECL
|
|
tree with another tree while duplicating the function's
|
|
body, TREE_MAP represents the mapping between these
|
|
trees. If UPDATE_CLONES is set, the call_stmt fields
|
|
of edges of clones of the function will be updated. */
|
|
void
|
|
tree_function_versioning (tree old_decl, tree new_decl, varray_type tree_map,
|
|
bool update_clones, bitmap args_to_skip)
|
|
{
|
|
struct cgraph_node *old_version_node;
|
|
struct cgraph_node *new_version_node;
|
|
copy_body_data id;
|
|
tree p;
|
|
unsigned i;
|
|
struct ipa_replace_map *replace_info;
|
|
basic_block old_entry_block;
|
|
VEC (gimple, heap) *init_stmts = VEC_alloc (gimple, heap, 10);
|
|
|
|
tree t_step;
|
|
tree old_current_function_decl = current_function_decl;
|
|
tree vars = NULL_TREE;
|
|
|
|
gcc_assert (TREE_CODE (old_decl) == FUNCTION_DECL
|
|
&& TREE_CODE (new_decl) == FUNCTION_DECL);
|
|
DECL_POSSIBLY_INLINED (old_decl) = 1;
|
|
|
|
old_version_node = cgraph_node (old_decl);
|
|
new_version_node = cgraph_node (new_decl);
|
|
|
|
/* Output the inlining info for this abstract function, since it has been
|
|
inlined. If we don't do this now, we can lose the information about the
|
|
variables in the function when the blocks get blown away as soon as we
|
|
remove the cgraph node. */
|
|
(*debug_hooks->outlining_inline_function) (old_decl);
|
|
|
|
DECL_ARTIFICIAL (new_decl) = 1;
|
|
DECL_ABSTRACT_ORIGIN (new_decl) = DECL_ORIGIN (old_decl);
|
|
|
|
/* Prepare the data structures for the tree copy. */
|
|
memset (&id, 0, sizeof (id));
|
|
|
|
/* Generate a new name for the new version. */
|
|
if (!update_clones)
|
|
{
|
|
DECL_NAME (new_decl) = clone_function_name (old_decl);
|
|
SET_DECL_ASSEMBLER_NAME (new_decl, DECL_NAME (new_decl));
|
|
SET_DECL_RTL (new_decl, NULL_RTX);
|
|
id.statements_to_fold = pointer_set_create ();
|
|
}
|
|
|
|
id.decl_map = pointer_map_create ();
|
|
id.src_fn = old_decl;
|
|
id.dst_fn = new_decl;
|
|
id.src_node = old_version_node;
|
|
id.dst_node = new_version_node;
|
|
id.src_cfun = DECL_STRUCT_FUNCTION (old_decl);
|
|
|
|
id.copy_decl = copy_decl_no_change;
|
|
id.transform_call_graph_edges
|
|
= update_clones ? CB_CGE_MOVE_CLONES : CB_CGE_MOVE;
|
|
id.transform_new_cfg = true;
|
|
id.transform_return_to_modify = false;
|
|
id.transform_lang_insert_block = NULL;
|
|
|
|
current_function_decl = new_decl;
|
|
old_entry_block = ENTRY_BLOCK_PTR_FOR_FUNCTION
|
|
(DECL_STRUCT_FUNCTION (old_decl));
|
|
initialize_cfun (new_decl, old_decl,
|
|
old_entry_block->count,
|
|
old_entry_block->frequency);
|
|
push_cfun (DECL_STRUCT_FUNCTION (new_decl));
|
|
|
|
/* Copy the function's static chain. */
|
|
p = DECL_STRUCT_FUNCTION (old_decl)->static_chain_decl;
|
|
if (p)
|
|
DECL_STRUCT_FUNCTION (new_decl)->static_chain_decl =
|
|
copy_static_chain (DECL_STRUCT_FUNCTION (old_decl)->static_chain_decl,
|
|
&id);
|
|
|
|
/* If there's a tree_map, prepare for substitution. */
|
|
if (tree_map)
|
|
for (i = 0; i < VARRAY_ACTIVE_SIZE (tree_map); i++)
|
|
{
|
|
gimple init;
|
|
replace_info
|
|
= (struct ipa_replace_map *) VARRAY_GENERIC_PTR (tree_map, i);
|
|
if (replace_info->replace_p)
|
|
{
|
|
tree op = replace_info->new_tree;
|
|
|
|
STRIP_NOPS (op);
|
|
|
|
if (TREE_CODE (op) == VIEW_CONVERT_EXPR)
|
|
op = TREE_OPERAND (op, 0);
|
|
|
|
if (TREE_CODE (op) == ADDR_EXPR)
|
|
{
|
|
op = TREE_OPERAND (op, 0);
|
|
while (handled_component_p (op))
|
|
op = TREE_OPERAND (op, 0);
|
|
if (TREE_CODE (op) == VAR_DECL)
|
|
add_referenced_var (op);
|
|
}
|
|
gcc_assert (TREE_CODE (replace_info->old_tree) == PARM_DECL);
|
|
init = setup_one_parameter (&id, replace_info->old_tree,
|
|
replace_info->new_tree, id.src_fn,
|
|
NULL,
|
|
&vars);
|
|
if (init)
|
|
VEC_safe_push (gimple, heap, init_stmts, init);
|
|
}
|
|
}
|
|
/* Copy the function's arguments. */
|
|
if (DECL_ARGUMENTS (old_decl) != NULL_TREE)
|
|
DECL_ARGUMENTS (new_decl) =
|
|
copy_arguments_for_versioning (DECL_ARGUMENTS (old_decl), &id,
|
|
args_to_skip, &vars);
|
|
|
|
DECL_INITIAL (new_decl) = remap_blocks (DECL_INITIAL (id.src_fn), &id);
|
|
|
|
/* Renumber the lexical scoping (non-code) blocks consecutively. */
|
|
number_blocks (id.dst_fn);
|
|
|
|
declare_inline_vars (DECL_INITIAL (new_decl), vars);
|
|
if (DECL_STRUCT_FUNCTION (old_decl)->local_decls != NULL_TREE)
|
|
/* Add local vars. */
|
|
for (t_step = DECL_STRUCT_FUNCTION (old_decl)->local_decls;
|
|
t_step; t_step = TREE_CHAIN (t_step))
|
|
{
|
|
tree var = TREE_VALUE (t_step);
|
|
if (TREE_STATIC (var) && !TREE_ASM_WRITTEN (var))
|
|
cfun->local_decls = tree_cons (NULL_TREE, var, cfun->local_decls);
|
|
else if (!can_be_nonlocal (var, &id))
|
|
cfun->local_decls =
|
|
tree_cons (NULL_TREE, remap_decl (var, &id),
|
|
cfun->local_decls);
|
|
}
|
|
|
|
/* Copy the Function's body. */
|
|
copy_body (&id, old_entry_block->count, old_entry_block->frequency, ENTRY_BLOCK_PTR, EXIT_BLOCK_PTR);
|
|
|
|
if (DECL_RESULT (old_decl) != NULL_TREE)
|
|
{
|
|
tree *res_decl = &DECL_RESULT (old_decl);
|
|
DECL_RESULT (new_decl) = remap_decl (*res_decl, &id);
|
|
lang_hooks.dup_lang_specific_decl (DECL_RESULT (new_decl));
|
|
}
|
|
|
|
/* Renumber the lexical scoping (non-code) blocks consecutively. */
|
|
number_blocks (new_decl);
|
|
|
|
if (VEC_length (gimple, init_stmts))
|
|
{
|
|
basic_block bb = split_edge (single_succ_edge (ENTRY_BLOCK_PTR));
|
|
while (VEC_length (gimple, init_stmts))
|
|
insert_init_stmt (bb, VEC_pop (gimple, init_stmts));
|
|
}
|
|
|
|
/* Clean up. */
|
|
pointer_map_destroy (id.decl_map);
|
|
free_dominance_info (CDI_DOMINATORS);
|
|
free_dominance_info (CDI_POST_DOMINATORS);
|
|
if (!update_clones)
|
|
{
|
|
fold_marked_statements (0, id.statements_to_fold);
|
|
pointer_set_destroy (id.statements_to_fold);
|
|
fold_cond_expr_cond ();
|
|
delete_unreachable_blocks ();
|
|
update_ssa (TODO_update_ssa);
|
|
}
|
|
VEC_free (gimple, heap, init_stmts);
|
|
pop_cfun ();
|
|
current_function_decl = old_current_function_decl;
|
|
gcc_assert (!current_function_decl
|
|
|| DECL_STRUCT_FUNCTION (current_function_decl) == cfun);
|
|
return;
|
|
}
|
|
|
|
/* Duplicate a type, fields and all. */
|
|
|
|
tree
|
|
build_duplicate_type (tree type)
|
|
{
|
|
struct copy_body_data id;
|
|
|
|
memset (&id, 0, sizeof (id));
|
|
id.src_fn = current_function_decl;
|
|
id.dst_fn = current_function_decl;
|
|
id.src_cfun = cfun;
|
|
id.decl_map = pointer_map_create ();
|
|
id.copy_decl = copy_decl_no_change;
|
|
|
|
type = remap_type_1 (type, &id);
|
|
|
|
pointer_map_destroy (id.decl_map);
|
|
|
|
TYPE_CANONICAL (type) = type;
|
|
|
|
return type;
|
|
}
|
|
|
|
/* Return whether it is safe to inline a function because it used different
|
|
target specific options or different optimization options. */
|
|
bool
|
|
tree_can_inline_p (tree caller, tree callee)
|
|
{
|
|
#if 0
|
|
/* This causes a regression in SPEC in that it prevents a cold function from
|
|
inlining a hot function. Perhaps this should only apply to functions
|
|
that the user declares hot/cold/optimize explicitly. */
|
|
|
|
/* Don't inline a function with a higher optimization level than the
|
|
caller, or with different space constraints (hot/cold functions). */
|
|
tree caller_tree = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (caller);
|
|
tree callee_tree = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (callee);
|
|
|
|
if (caller_tree != callee_tree)
|
|
{
|
|
struct cl_optimization *caller_opt
|
|
= TREE_OPTIMIZATION ((caller_tree)
|
|
? caller_tree
|
|
: optimization_default_node);
|
|
|
|
struct cl_optimization *callee_opt
|
|
= TREE_OPTIMIZATION ((callee_tree)
|
|
? callee_tree
|
|
: optimization_default_node);
|
|
|
|
if ((caller_opt->optimize > callee_opt->optimize)
|
|
|| (caller_opt->optimize_size != callee_opt->optimize_size))
|
|
return false;
|
|
}
|
|
#endif
|
|
|
|
/* Allow the backend to decide if inlining is ok. */
|
|
return targetm.target_option.can_inline_p (caller, callee);
|
|
}
|
|
|
|
#include "gt-tree-inline.h"
|