791 lines
28 KiB
C
791 lines
28 KiB
C
/* Data and Control Flow Analysis for Trees.
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Copyright (C) 2001, 2003, 2004, 2005 Free Software Foundation, Inc.
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Contributed by Diego Novillo <dnovillo@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 2, 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 COPYING. If not, write to
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the Free Software Foundation, 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#ifndef _TREE_FLOW_H
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#define _TREE_FLOW_H 1
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#include "bitmap.h"
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#include "hard-reg-set.h"
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#include "basic-block.h"
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#include "hashtab.h"
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#include "tree-gimple.h"
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#include "tree-ssa-operands.h"
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#include "cgraph.h"
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/* Forward declare structures for the garbage collector GTY markers. */
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#ifndef GCC_BASIC_BLOCK_H
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struct edge_def;
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typedef struct edge_def *edge;
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struct basic_block_def;
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typedef struct basic_block_def *basic_block;
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#endif
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/* True if the code is in ssa form. */
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extern bool in_ssa_p;
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/*---------------------------------------------------------------------------
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Attributes for SSA_NAMEs.
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NOTE: These structures are stored in struct tree_ssa_name
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but are only used by the tree optimizers, so it makes better sense
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to declare them here to avoid recompiling unrelated files when
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making changes.
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---------------------------------------------------------------------------*/
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/* Aliasing information for SSA_NAMEs representing pointer variables. */
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struct ptr_info_def GTY(())
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{
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/* Nonzero if points-to analysis couldn't determine where this pointer
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is pointing to. */
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unsigned int pt_anything : 1;
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/* Nonzero if this pointer is the result of a call to malloc. */
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unsigned int pt_malloc : 1;
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/* Nonzero if the value of this pointer escapes the current function. */
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unsigned int value_escapes_p : 1;
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/* Nonzero if this pointer is dereferenced. */
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unsigned int is_dereferenced : 1;
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/* Nonzero if this pointer points to a global variable. */
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unsigned int pt_global_mem : 1;
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/* Nonzero if this pointer points to NULL. */
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unsigned int pt_null : 1;
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/* Set of variables that this pointer may point to. */
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bitmap pt_vars;
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/* If this pointer has been dereferenced, and points-to information is
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more precise than type-based aliasing, indirect references to this
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pointer will be represented by this memory tag, instead of the type
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tag computed by TBAA. */
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tree name_mem_tag;
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};
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/* Types of value ranges. */
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enum value_range_type { VR_UNDEFINED, VR_RANGE, VR_ANTI_RANGE, VR_VARYING };
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/* Ranges of values that can be associated with an SSA_NAME after VRP
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has executed. */
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struct value_range_def GTY(())
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{
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/* Lattice value represented by this range. */
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enum value_range_type type;
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/* Minimum and maximum values represented by this range. These
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values are _CST nodes that should be interpreted as follows:
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- If TYPE == VR_UNDEFINED then MIN and MAX must be NULL.
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- If TYPE == VR_RANGE then MIN holds the minimum value and
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MAX holds the maximum value of the range [MIN, MAX].
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- If TYPE == ANTI_RANGE the variable is known to NOT
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take any values in the range [MIN, MAX]. */
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tree min;
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tree max;
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};
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typedef struct value_range_def value_range;
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/*---------------------------------------------------------------------------
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Tree annotations stored in tree_common.ann
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---------------------------------------------------------------------------*/
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enum tree_ann_type { TREE_ANN_COMMON, VAR_ANN, STMT_ANN };
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struct tree_ann_common_d GTY(())
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{
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/* Annotation type. */
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enum tree_ann_type type;
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/* The value handle for this expression. Used by GVN-PRE. */
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tree GTY((skip)) value_handle;
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};
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/* It is advantageous to avoid things like life analysis for variables which
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do not need PHI nodes. This enum describes whether or not a particular
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variable may need a PHI node. */
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enum need_phi_state {
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/* This is the default. If we are still in this state after finding
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all the definition and use sites, then we will assume the variable
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needs PHI nodes. This is probably an overly conservative assumption. */
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NEED_PHI_STATE_UNKNOWN,
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/* This state indicates that we have seen one or more sets of the
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variable in a single basic block and that the sets dominate all
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uses seen so far. If after finding all definition and use sites
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we are still in this state, then the variable does not need any
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PHI nodes. */
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NEED_PHI_STATE_NO,
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/* This state indicates that we have either seen multiple definitions of
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the variable in multiple blocks, or that we encountered a use in a
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block that was not dominated by the block containing the set(s) of
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this variable. This variable is assumed to need PHI nodes. */
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NEED_PHI_STATE_MAYBE
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};
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/* When computing aliasing information, we represent the memory pointed-to
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by pointers with artificial variables called "memory tags" (MT). There
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are two kinds of tags: type and name. Type tags (TMT) are used in
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type-based alias analysis, they represent all the pointed-to locations
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and variables of the same alias set class. Name tags (NMT) are used in
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flow-sensitive points-to alias analysis, they represent the variables
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and memory locations pointed-to by a specific SSA_NAME pointer. */
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enum mem_tag_kind {
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/* This variable is not a memory tag. */
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NOT_A_TAG,
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/* This variable is a type memory tag (TMT). */
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TYPE_TAG,
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/* This variable is a name memory tag (NMT). */
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NAME_TAG,
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/* This variable represents a structure field. */
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STRUCT_FIELD
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};
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struct subvar;
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typedef struct subvar *subvar_t;
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/* This structure represents a fake sub-variable for a structure field. */
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struct subvar GTY(())
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{
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/* Fake variable name */
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tree var;
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/* Offset inside structure. */
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HOST_WIDE_INT offset;
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/* Size of field. */
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HOST_WIDE_INT size;
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/* Next subvar for this structure. */
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subvar_t next;
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};
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struct var_ann_d GTY(())
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{
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struct tree_ann_common_d common;
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/* Used by the out of SSA pass to determine whether this variable has
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been seen yet or not. */
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unsigned out_of_ssa_tag : 1;
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/* Used when building root_var structures in tree_ssa_live.[ch]. */
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unsigned root_var_processed : 1;
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/* If nonzero, this variable is a memory tag. */
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ENUM_BITFIELD (mem_tag_kind) mem_tag_kind : 2;
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/* Nonzero if this variable is an alias tag that represents references to
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other variables (i.e., this variable appears in the MAY_ALIASES array
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of other variables). */
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unsigned is_alias_tag : 1;
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/* Nonzero if this variable was used after SSA optimizations were
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applied. We set this when translating out of SSA form. */
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unsigned used : 1;
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/* This field indicates whether or not the variable may need PHI nodes.
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See the enum's definition for more detailed information about the
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states. */
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ENUM_BITFIELD (need_phi_state) need_phi_state : 2;
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/* Used during operand processing to determine if this variable is already
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in the vuse list. */
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unsigned in_vuse_list : 1;
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/* Used during operand processing to determine if this variable is already
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in the v_may_def list. */
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unsigned in_v_may_def_list : 1;
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/* An artificial variable representing the memory location pointed-to by
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all the pointers that TBAA (type-based alias analysis) considers
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to be aliased. If the variable is not a pointer or if it is never
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dereferenced, this must be NULL. */
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tree type_mem_tag;
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/* Variables that may alias this variable. */
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varray_type may_aliases;
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/* Unique ID of this variable. */
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size_t uid;
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/* Used when going out of SSA form to indicate which partition this
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variable represents storage for. */
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unsigned partition;
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/* Used by the root-var object in tree-ssa-live.[ch]. */
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unsigned root_index;
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/* Default definition for this symbol. If this field is not NULL, it
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means that the first reference to this variable in the function is a
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USE or a VUSE. In those cases, the SSA renamer creates an SSA name
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for this variable with an empty defining statement. */
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tree default_def;
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/* During into-ssa and the dominator optimizer, this field holds the
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current version of this variable (an SSA_NAME). */
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tree current_def;
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/* If this variable is a structure, this fields holds a list of
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symbols representing each of the fields of the structure. */
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subvar_t subvars;
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};
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typedef struct immediate_use_iterator_d
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{
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ssa_use_operand_t *imm_use;
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ssa_use_operand_t *end_p;
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ssa_use_operand_t iter_node;
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} imm_use_iterator;
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/* Use this iterator when simply looking at stmts. Adding, deleting or
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modifying stmts will cause this iterator to malfunction. */
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#define FOR_EACH_IMM_USE_FAST(DEST, ITER, SSAVAR) \
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for ((DEST) = first_readonly_imm_use (&(ITER), (SSAVAR)); \
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!end_readonly_imm_use_p (&(ITER)); \
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(DEST) = next_readonly_imm_use (&(ITER)))
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#define FOR_EACH_IMM_USE_SAFE(DEST, ITER, SSAVAR) \
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for ((DEST) = first_safe_imm_use (&(ITER), (SSAVAR)); \
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!end_safe_imm_use_p (&(ITER)); \
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(DEST) = next_safe_imm_use (&(ITER)))
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#define BREAK_FROM_SAFE_IMM_USE(ITER) \
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{ \
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end_safe_imm_use_traverse (&(ITER)); \
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break; \
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}
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struct stmt_ann_d GTY(())
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{
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struct tree_ann_common_d common;
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/* Nonzero if the statement has been modified (meaning that the operands
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need to be scanned again). */
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unsigned modified : 1;
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/* Nonzero if the statement makes aliased loads. */
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unsigned makes_aliased_loads : 1;
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/* Nonzero if the statement makes aliased stores. */
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unsigned makes_aliased_stores : 1;
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/* Nonzero if the statement makes references to volatile storage. */
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unsigned has_volatile_ops : 1;
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/* Nonzero if the statement makes a function call that may clobber global
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and local addressable variables. */
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unsigned makes_clobbering_call : 1;
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/* Basic block that contains this statement. */
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basic_block GTY ((skip (""))) bb;
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/* Operand cache for stmt. */
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struct stmt_operands_d GTY ((skip (""))) operands;
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/* Set of variables that have had their address taken in the statement. */
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bitmap addresses_taken;
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/* Unique identifier for this statement. These ID's are to be created
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by each pass on an as-needed basis in any order convenient for the
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pass which needs statement UIDs. */
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unsigned int uid;
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/* Auxiliary info specific to a pass. At all times, this
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should either point to valid data or be NULL. */
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PTR GTY ((skip (""))) aux;
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/* Linked list of histograms for value-based profiling. This is really a
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struct histogram_value*. We use void* to avoid having to export that
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everywhere, and to avoid having to put it in GC memory. */
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void * GTY ((skip (""))) histograms;
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};
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union tree_ann_d GTY((desc ("ann_type ((tree_ann_t)&%h)")))
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{
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struct tree_ann_common_d GTY((tag ("TREE_ANN_COMMON"))) common;
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struct var_ann_d GTY((tag ("VAR_ANN"))) decl;
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struct stmt_ann_d GTY((tag ("STMT_ANN"))) stmt;
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};
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extern GTY(()) VEC(tree,gc) *modified_noreturn_calls;
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typedef union tree_ann_d *tree_ann_t;
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typedef struct var_ann_d *var_ann_t;
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typedef struct stmt_ann_d *stmt_ann_t;
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static inline tree_ann_t tree_ann (tree);
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static inline tree_ann_t get_tree_ann (tree);
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static inline var_ann_t var_ann (tree);
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static inline var_ann_t get_var_ann (tree);
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static inline stmt_ann_t stmt_ann (tree);
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static inline stmt_ann_t get_stmt_ann (tree);
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static inline enum tree_ann_type ann_type (tree_ann_t);
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static inline basic_block bb_for_stmt (tree);
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extern void set_bb_for_stmt (tree, basic_block);
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static inline bool noreturn_call_p (tree);
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static inline void update_stmt (tree);
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static inline bool stmt_modified_p (tree);
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static inline varray_type may_aliases (tree);
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static inline int get_lineno (tree);
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static inline const char *get_filename (tree);
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static inline bool is_exec_stmt (tree);
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static inline bool is_label_stmt (tree);
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static inline bitmap addresses_taken (tree);
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static inline void set_default_def (tree, tree);
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static inline tree default_def (tree);
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/*---------------------------------------------------------------------------
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Structure representing predictions in tree level.
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---------------------------------------------------------------------------*/
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struct edge_prediction GTY((chain_next ("%h.next")))
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{
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struct edge_prediction *next;
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edge edge;
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enum br_predictor predictor;
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int probability;
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};
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/*---------------------------------------------------------------------------
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Block annotations stored in basic_block.tree_annotations
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---------------------------------------------------------------------------*/
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struct bb_ann_d GTY(())
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{
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/* Chain of PHI nodes for this block. */
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tree phi_nodes;
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/* Nonzero if this block contains an escape point (see is_escape_site). */
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unsigned has_escape_site : 1;
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/* Nonzero if one or more incoming edges to this block should be threaded
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to an outgoing edge of this block. */
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unsigned incoming_edge_threaded : 1;
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struct edge_prediction *predictions;
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};
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typedef struct bb_ann_d *bb_ann_t;
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/* Accessors for basic block annotations. */
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static inline bb_ann_t bb_ann (basic_block);
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static inline tree phi_nodes (basic_block);
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static inline void set_phi_nodes (basic_block, tree);
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/*---------------------------------------------------------------------------
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Global declarations
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---------------------------------------------------------------------------*/
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/* Array of all variables referenced in the function. */
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extern GTY(()) VEC(tree,gc) *referenced_vars;
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#define num_referenced_vars VEC_length (tree, referenced_vars)
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#define referenced_var(i) VEC_index (tree, referenced_vars, i)
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/* Array of all SSA_NAMEs used in the function. */
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extern GTY(()) VEC(tree,gc) *ssa_names;
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#define num_ssa_names (VEC_length (tree, ssa_names))
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#define ssa_name(i) (VEC_index (tree, ssa_names, (i)))
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/* Artificial variable used to model the effects of function calls. */
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extern GTY(()) tree global_var;
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/* Call clobbered variables in the function. If bit I is set, then
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REFERENCED_VARS (I) is call-clobbered. */
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extern bitmap call_clobbered_vars;
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/* Addressable variables in the function. If bit I is set, then
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REFERENCED_VARS (I) has had its address taken. */
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extern bitmap addressable_vars;
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/* 'true' after aliases have been computed (see compute_may_aliases). */
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extern bool aliases_computed_p;
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/* Macros for showing usage statistics. */
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#define SCALE(x) ((unsigned long) ((x) < 1024*10 \
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? (x) \
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: ((x) < 1024*1024*10 \
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? (x) / 1024 \
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: (x) / (1024*1024))))
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#define LABEL(x) ((x) < 1024*10 ? 'b' : ((x) < 1024*1024*10 ? 'k' : 'M'))
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#define PERCENT(x,y) ((float)(x) * 100.0 / (float)(y))
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/*---------------------------------------------------------------------------
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Block iterators
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---------------------------------------------------------------------------*/
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typedef struct {
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tree_stmt_iterator tsi;
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basic_block bb;
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} block_stmt_iterator;
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static inline block_stmt_iterator bsi_start (basic_block);
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static inline block_stmt_iterator bsi_last (basic_block);
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static inline block_stmt_iterator bsi_after_labels (basic_block);
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block_stmt_iterator bsi_for_stmt (tree);
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static inline bool bsi_end_p (block_stmt_iterator);
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static inline void bsi_next (block_stmt_iterator *);
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static inline void bsi_prev (block_stmt_iterator *);
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static inline tree bsi_stmt (block_stmt_iterator);
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static inline tree * bsi_stmt_ptr (block_stmt_iterator);
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extern void bsi_remove (block_stmt_iterator *);
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extern void bsi_move_before (block_stmt_iterator *, block_stmt_iterator *);
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extern void bsi_move_after (block_stmt_iterator *, block_stmt_iterator *);
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extern void bsi_move_to_bb_end (block_stmt_iterator *, basic_block);
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enum bsi_iterator_update
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{
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/* Note that these are intentionally in the same order as TSI_FOO. They
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mean exactly the same as their TSI_* counterparts. */
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BSI_NEW_STMT,
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BSI_SAME_STMT,
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BSI_CHAIN_START,
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BSI_CHAIN_END,
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BSI_CONTINUE_LINKING
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};
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extern void bsi_insert_before (block_stmt_iterator *, tree,
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enum bsi_iterator_update);
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extern void bsi_insert_after (block_stmt_iterator *, tree,
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enum bsi_iterator_update);
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extern void bsi_replace (const block_stmt_iterator *, tree, bool);
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/*---------------------------------------------------------------------------
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Function prototypes
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---------------------------------------------------------------------------*/
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/* In tree-cfg.c */
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/* Location to track pending stmt for edge insertion. */
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#define PENDING_STMT(e) ((e)->insns.t)
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extern void delete_tree_cfg_annotations (void);
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extern void disband_implicit_edges (void);
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extern bool stmt_ends_bb_p (tree);
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extern bool is_ctrl_stmt (tree);
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extern bool is_ctrl_altering_stmt (tree);
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extern bool computed_goto_p (tree);
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extern bool simple_goto_p (tree);
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extern void tree_dump_bb (basic_block, FILE *, int);
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extern void debug_tree_bb (basic_block);
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extern basic_block debug_tree_bb_n (int);
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extern void dump_tree_cfg (FILE *, int);
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extern void debug_tree_cfg (int);
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extern void dump_cfg_stats (FILE *);
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extern void debug_cfg_stats (void);
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extern void debug_loop_ir (void);
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extern void print_loop_ir (FILE *);
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extern void cleanup_dead_labels (void);
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extern void group_case_labels (void);
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extern bool cleanup_tree_cfg (void);
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extern void cleanup_tree_cfg_loop (void);
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extern tree first_stmt (basic_block);
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extern tree last_stmt (basic_block);
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extern tree *last_stmt_ptr (basic_block);
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extern tree last_and_only_stmt (basic_block);
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extern edge find_taken_edge (basic_block, tree);
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extern basic_block label_to_block_fn (struct function *, tree);
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#define label_to_block(t) (label_to_block_fn (cfun, t))
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extern void bsi_insert_on_edge (edge, tree);
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extern basic_block bsi_insert_on_edge_immediate (edge, tree);
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extern void bsi_commit_one_edge_insert (edge, basic_block *);
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extern void bsi_commit_edge_inserts (void);
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extern void notice_special_calls (tree);
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extern void clear_special_calls (void);
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extern void verify_stmts (void);
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extern tree tree_block_label (basic_block);
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extern void extract_true_false_edges_from_block (basic_block, edge *, edge *);
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extern bool tree_duplicate_sese_region (edge, edge, basic_block *, unsigned,
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basic_block *);
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extern void add_phi_args_after_copy_bb (basic_block);
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extern void add_phi_args_after_copy (basic_block *, unsigned);
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extern bool tree_purge_dead_eh_edges (basic_block);
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extern bool tree_purge_all_dead_eh_edges (bitmap);
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extern tree gimplify_val (block_stmt_iterator *, tree, tree);
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extern tree gimplify_build1 (block_stmt_iterator *, enum tree_code,
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tree, tree);
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extern tree gimplify_build2 (block_stmt_iterator *, enum tree_code,
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tree, tree, tree);
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extern tree gimplify_build3 (block_stmt_iterator *, enum tree_code,
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tree, tree, tree, tree);
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extern void init_empty_tree_cfg (void);
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/* In tree-pretty-print.c. */
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extern void dump_generic_bb (FILE *, basic_block, int, int);
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/* In tree-dfa.c */
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extern var_ann_t create_var_ann (tree);
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extern stmt_ann_t create_stmt_ann (tree);
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extern tree_ann_t create_tree_ann (tree);
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extern void reserve_phi_args_for_new_edge (basic_block);
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extern tree create_phi_node (tree, basic_block);
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extern void add_phi_arg (tree, tree, edge);
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extern void remove_phi_args (edge);
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extern void remove_phi_node (tree, tree);
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extern tree phi_reverse (tree);
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extern void dump_dfa_stats (FILE *);
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extern void debug_dfa_stats (void);
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extern void debug_referenced_vars (void);
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extern void dump_referenced_vars (FILE *);
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extern void dump_variable (FILE *, tree);
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extern void debug_variable (tree);
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extern tree get_virtual_var (tree);
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extern void add_referenced_tmp_var (tree);
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extern void mark_new_vars_to_rename (tree);
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extern void find_new_referenced_vars (tree *);
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extern tree make_rename_temp (tree, const char *);
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/* In gimple-low.c */
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extern void record_vars (tree);
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extern bool block_may_fallthru (tree block);
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/* In tree-ssa-alias.c */
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extern void dump_may_aliases_for (FILE *, tree);
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extern void debug_may_aliases_for (tree);
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extern void dump_alias_info (FILE *);
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extern void debug_alias_info (void);
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extern void dump_points_to_info (FILE *);
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extern void debug_points_to_info (void);
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extern void dump_points_to_info_for (FILE *, tree);
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extern void debug_points_to_info_for (tree);
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extern bool may_be_aliased (tree);
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|
extern struct ptr_info_def *get_ptr_info (tree);
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|
extern void add_type_alias (tree, tree);
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|
extern void count_uses_and_derefs (tree, tree, unsigned *, unsigned *, bool *);
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|
static inline subvar_t get_subvars_for_var (tree);
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|
static inline bool ref_contains_array_ref (tree);
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|
extern tree okay_component_ref_for_subvars (tree, HOST_WIDE_INT *,
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|
HOST_WIDE_INT *);
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|
static inline bool var_can_have_subvars (tree);
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|
static inline bool overlap_subvar (HOST_WIDE_INT, HOST_WIDE_INT,
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|
subvar_t, bool *);
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/* Call-back function for walk_use_def_chains(). At each reaching
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definition, a function with this prototype is called. */
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typedef bool (*walk_use_def_chains_fn) (tree, tree, void *);
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|
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/* In tree-ssa.c */
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|
extern void init_tree_ssa (void);
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|
extern edge ssa_redirect_edge (edge, basic_block);
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|
extern void flush_pending_stmts (edge);
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|
extern bool tree_ssa_useless_type_conversion (tree);
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|
extern bool tree_ssa_useless_type_conversion_1 (tree, tree);
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|
extern void verify_ssa (bool);
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|
extern void delete_tree_ssa (void);
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|
extern void register_new_def (tree, VEC(tree,heap) **);
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|
extern void walk_use_def_chains (tree, walk_use_def_chains_fn, void *, bool);
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|
extern bool stmt_references_memory_p (tree);
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|
|
|
/* In tree-into-ssa.c */
|
|
void update_ssa (unsigned);
|
|
void delete_update_ssa (void);
|
|
void register_new_name_mapping (tree, tree);
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|
tree create_new_def_for (tree, tree, def_operand_p);
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|
bool need_ssa_update_p (void);
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|
bool name_registered_for_update_p (tree);
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|
bitmap ssa_names_to_replace (void);
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|
void release_ssa_name_after_update_ssa (tree name);
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|
void compute_global_livein (bitmap, bitmap);
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|
tree duplicate_ssa_name (tree, tree);
|
|
void mark_sym_for_renaming (tree);
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|
void mark_set_for_renaming (bitmap);
|
|
tree get_current_def (tree);
|
|
void set_current_def (tree, tree);
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|
|
|
/* In tree-ssa-ccp.c */
|
|
bool fold_stmt (tree *);
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|
tree widen_bitfield (tree, tree, tree);
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|
|
|
/* In tree-vrp.c */
|
|
value_range *get_value_range (tree);
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|
void dump_value_range (FILE *, value_range *);
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|
void debug_value_range (value_range *);
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|
void dump_all_value_ranges (FILE *);
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|
void debug_all_value_ranges (void);
|
|
bool expr_computes_nonzero (tree);
|
|
|
|
/* In tree-ssa-dom.c */
|
|
extern void dump_dominator_optimization_stats (FILE *);
|
|
extern void debug_dominator_optimization_stats (void);
|
|
int loop_depth_of_name (tree);
|
|
|
|
/* In tree-ssa-copy.c */
|
|
extern void propagate_value (use_operand_p, tree);
|
|
extern void propagate_tree_value (tree *, tree);
|
|
extern void replace_exp (use_operand_p, tree);
|
|
extern bool may_propagate_copy (tree, tree);
|
|
extern bool may_propagate_copy_into_asm (tree);
|
|
|
|
/* Description of number of iterations of a loop. All the expressions inside
|
|
the structure can be evaluated at the end of the loop's preheader
|
|
(and due to ssa form, also anywhere inside the body of the loop). */
|
|
|
|
struct tree_niter_desc
|
|
{
|
|
tree assumptions; /* The boolean expression. If this expression evaluates
|
|
to false, then the other fields in this structure
|
|
should not be used; there is no guarantee that they
|
|
will be correct. */
|
|
tree may_be_zero; /* The boolean expression. If it evaluates to true,
|
|
the loop will exit in the first iteration (i.e.
|
|
its latch will not be executed), even if the niter
|
|
field says otherwise. */
|
|
tree niter; /* The expression giving the number of iterations of
|
|
a loop (provided that assumptions == true and
|
|
may_be_zero == false), more precisely the number
|
|
of executions of the latch of the loop. */
|
|
tree additional_info; /* The boolean expression. Sometimes we use additional
|
|
knowledge to simplify the other expressions
|
|
contained in this structure (for example the
|
|
knowledge about value ranges of operands on entry to
|
|
the loop). If this is a case, conjunction of such
|
|
condition is stored in this field, so that we do not
|
|
lose the information: for example if may_be_zero
|
|
is (n <= 0) and niter is (unsigned) n, we know
|
|
that the number of iterations is at most
|
|
MAX_SIGNED_INT. However if the (n <= 0) assumption
|
|
is eliminated (by looking at the guard on entry of
|
|
the loop), then the information would be lost. */
|
|
};
|
|
|
|
/* In tree-vectorizer.c */
|
|
void vectorize_loops (struct loops *);
|
|
|
|
/* In tree-ssa-phiopt.c */
|
|
bool empty_block_p (basic_block);
|
|
|
|
/* In tree-ssa-loop*.c */
|
|
|
|
void tree_ssa_lim (struct loops *);
|
|
void tree_ssa_unswitch_loops (struct loops *);
|
|
void canonicalize_induction_variables (struct loops *);
|
|
void tree_unroll_loops_completely (struct loops *, bool);
|
|
void tree_ssa_iv_optimize (struct loops *);
|
|
|
|
bool number_of_iterations_exit (struct loop *, edge,
|
|
struct tree_niter_desc *niter);
|
|
tree find_loop_niter (struct loop *, edge *);
|
|
tree loop_niter_by_eval (struct loop *, edge);
|
|
tree find_loop_niter_by_eval (struct loop *, edge *);
|
|
void estimate_numbers_of_iterations (struct loops *);
|
|
tree can_count_iv_in_wider_type (struct loop *, tree, tree, tree, tree);
|
|
void free_numbers_of_iterations_estimates (struct loops *);
|
|
void rewrite_into_loop_closed_ssa (bitmap, unsigned);
|
|
void verify_loop_closed_ssa (void);
|
|
void loop_commit_inserts (void);
|
|
bool for_each_index (tree *, bool (*) (tree, tree *, void *), void *);
|
|
void create_iv (tree, tree, tree, struct loop *, block_stmt_iterator *, bool,
|
|
tree *, tree *);
|
|
void split_loop_exit_edge (edge);
|
|
basic_block bsi_insert_on_edge_immediate_loop (edge, tree);
|
|
void standard_iv_increment_position (struct loop *, block_stmt_iterator *,
|
|
bool *);
|
|
basic_block ip_end_pos (struct loop *);
|
|
basic_block ip_normal_pos (struct loop *);
|
|
bool tree_duplicate_loop_to_header_edge (struct loop *, edge, struct loops *,
|
|
unsigned int, sbitmap,
|
|
edge, edge *,
|
|
unsigned int *, int);
|
|
struct loop *tree_ssa_loop_version (struct loops *, struct loop *, tree,
|
|
basic_block *);
|
|
|
|
/* In tree-ssa-loop-im.c */
|
|
/* The possibilities of statement movement. */
|
|
|
|
enum move_pos
|
|
{
|
|
MOVE_IMPOSSIBLE, /* No movement -- side effect expression. */
|
|
MOVE_PRESERVE_EXECUTION, /* Must not cause the non-executed statement
|
|
become executed -- memory accesses, ... */
|
|
MOVE_POSSIBLE /* Unlimited movement. */
|
|
};
|
|
extern enum move_pos movement_possibility (tree);
|
|
|
|
/* In tree-flow-inline.h */
|
|
static inline bool is_call_clobbered (tree);
|
|
static inline void mark_call_clobbered (tree);
|
|
static inline void set_is_used (tree);
|
|
static inline bool unmodifiable_var_p (tree);
|
|
|
|
/* In tree-eh.c */
|
|
extern void make_eh_edges (tree);
|
|
extern bool tree_could_trap_p (tree);
|
|
extern bool tree_could_throw_p (tree);
|
|
extern bool tree_can_throw_internal (tree);
|
|
extern bool tree_can_throw_external (tree);
|
|
extern int lookup_stmt_eh_region (tree);
|
|
extern void add_stmt_to_eh_region (tree, int);
|
|
extern bool remove_stmt_from_eh_region (tree);
|
|
extern bool maybe_clean_eh_stmt (tree);
|
|
|
|
/* In tree-ssa-pre.c */
|
|
void add_to_value (tree, tree);
|
|
void debug_value_expressions (tree);
|
|
void print_value_expressions (FILE *, tree);
|
|
|
|
|
|
/* In tree-vn.c */
|
|
bool expressions_equal_p (tree, tree);
|
|
tree get_value_handle (tree);
|
|
hashval_t vn_compute (tree, hashval_t, tree);
|
|
tree vn_lookup_or_add (tree, tree);
|
|
void vn_add (tree, tree, tree);
|
|
tree vn_lookup (tree, tree);
|
|
void vn_init (void);
|
|
void vn_delete (void);
|
|
|
|
/* In tree-ssa-sink.c */
|
|
bool is_hidden_global_store (tree);
|
|
|
|
/* In tree-sra.c */
|
|
void insert_edge_copies (tree, basic_block);
|
|
|
|
/* In tree-loop-linear.c */
|
|
extern void linear_transform_loops (struct loops *);
|
|
|
|
/* In tree-ssa-loop-ivopts.c */
|
|
extern bool expr_invariant_in_loop_p (struct loop *, tree);
|
|
|
|
/* In gimplify.c */
|
|
tree force_gimple_operand (tree, tree *, bool, tree);
|
|
tree force_gimple_operand_bsi (block_stmt_iterator *, tree, bool, tree);
|
|
|
|
#include "tree-flow-inline.h"
|
|
|
|
#endif /* _TREE_FLOW_H */
|