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tree-ssa-live.h (coalesce_ssa_name): Move Prototype to...

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* tree-ssa-live.h (coalesce_ssa_name): Move Prototype to...
	* tree-ssa-coalesce.h: New. Move prototype to here.
	* tree-outof-ssa.h: Include tree-ssa-coalesce.h.
	* tree-ssa-coalesce.c: Include tree-outof-ssa.h.
	(gimple_can_coalesce_p): Move to...
	* gimple.c (gimple_can_coalesce_p): Here.

From-SVN: r203069
This commit is contained in:
Andrew MacLeod 2013-10-01 16:23:52 +00:00 committed by Andrew Macleod
parent 80560f9521
commit 1df9f5a998
6 changed files with 74 additions and 44 deletions
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9
gcc/ChangeLog
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@ -1,3 +1,12 @@
2013-10-01 Andrew MacLeod <amacleod@redhat.com>
* tree-ssa-live.h (coalesce_ssa_name): Move Prototype to...
* tree-ssa-coalesce.h: New. Move prototype to here.
* tree-outof-ssa.h: Include tree-ssa-coalesce.h.
* tree-ssa-coalesce.c: Include tree-outof-ssa.h.
(gimple_can_coalesce_p): Move to...
* gimple.c (gimple_can_coalesce_p): Here.
2013-10-01 Andrew MacLeod <amacleod@redhat.com>
* tree-into-ssa.c (enum need_phi_state): Relocate from tree-flow.h.

38
gcc/gimple.c
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@ -4380,4 +4380,42 @@ dump_decl_set (FILE *file, bitmap set)
fprintf (file, "NIL");
}
/* Given SSA_NAMEs NAME1 and NAME2, return true if they are candidates for
coalescing together, false otherwise.
This must stay consistent with var_map_base_init in tree-ssa-live.c. */
bool
gimple_can_coalesce_p (tree name1, tree name2)
{
/* First check the SSA_NAME's associated DECL. We only want to
coalesce if they have the same DECL or both have no associated DECL. */
tree var1 = SSA_NAME_VAR (name1);
tree var2 = SSA_NAME_VAR (name2);
var1 = (var1 && (!VAR_P (var1) || !DECL_IGNORED_P (var1))) ? var1 : NULL_TREE;
var2 = (var2 && (!VAR_P (var2) || !DECL_IGNORED_P (var2))) ? var2 : NULL_TREE;
if (var1 != var2)
return false;
/* Now check the types. If the types are the same, then we should
try to coalesce V1 and V2. */
tree t1 = TREE_TYPE (name1);
tree t2 = TREE_TYPE (name2);
if (t1 == t2)
return true;
/* If the types are not the same, check for a canonical type match. This
(for example) allows coalescing when the types are fundamentally the
same, but just have different names.
Note pointer types with different address spaces may have the same
canonical type. Those are rejected for coalescing by the
types_compatible_p check. */
if (TYPE_CANONICAL (t1)
&& TYPE_CANONICAL (t1) == TYPE_CANONICAL (t2)
&& types_compatible_p (t1, t2))
return true;
return false;
}
#include "gt-gimple.h"

1
gcc/tree-outof-ssa.h
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@ -23,6 +23,7 @@ along with GCC; see the file COPYING3. If not see
#include "tree-ssa-live.h"
#include "tree-ssa-ter.h"
#include "tree-ssa-coalesce.h"
/* This structure (of which only a singleton SA exists) is used to
pass around information between the outof-SSA functions, cfgexpand

41
gcc/tree-ssa-coalesce.c
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@ -29,7 +29,7 @@ along with GCC; see the file COPYING3. If not see
#include "dumpfile.h"
#include "tree-ssa.h"
#include "hash-table.h"
#include "tree-ssa-live.h"
#include "tree-outof-ssa.h"
#include "diagnostic-core.h"
@ -1333,42 +1333,3 @@ coalesce_ssa_name (void)
return map;
}
/* Given SSA_NAMEs NAME1 and NAME2, return true if they are candidates for
coalescing together, false otherwise.
This must stay consistent with var_map_base_init in tree-ssa-live.c. */
bool
gimple_can_coalesce_p (tree name1, tree name2)
{
/* First check the SSA_NAME's associated DECL. We only want to
coalesce if they have the same DECL or both have no associated DECL. */
tree var1 = SSA_NAME_VAR (name1);
tree var2 = SSA_NAME_VAR (name2);
var1 = (var1 && (!VAR_P (var1) || !DECL_IGNORED_P (var1))) ? var1 : NULL_TREE;
var2 = (var2 && (!VAR_P (var2) || !DECL_IGNORED_P (var2))) ? var2 : NULL_TREE;
if (var1 != var2)
return false;
/* Now check the types. If the types are the same, then we should
try to coalesce V1 and V2. */
tree t1 = TREE_TYPE (name1);
tree t2 = TREE_TYPE (name2);
if (t1 == t2)
return true;
/* If the types are not the same, check for a canonical type match. This
(for example) allows coalescing when the types are fundamentally the
same, but just have different names.
Note pointer types with different address spaces may have the same
canonical type. Those are rejected for coalescing by the
types_compatible_p check. */
if (TYPE_CANONICAL (t1)
&& TYPE_CANONICAL (t1) == TYPE_CANONICAL (t2)
&& types_compatible_p (t1, t2))
return true;
return false;
}

25
gcc/tree-ssa-coalesce.h Normal file
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@ -0,0 +1,25 @@
/* Header file for tree-ssa-coalesce.c exports.
Copyright (C) 2013 Free Software Foundation, Inc.
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 3, or (at your option) any later
version.
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. */
#ifndef GCC_TREE_SSA_COALESCE_H
#define GCC_TREE_SSA_COALESCE_H
extern var_map coalesce_ssa_name (void);
#endif /* GCC_TREE_SSA_COALESCE_H */

4
gcc/tree-ssa-live.h
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@ -321,8 +321,4 @@ make_live_on_entry (tree_live_info_p live, basic_block bb , int p)
bitmap_set_bit (live->global, p);
}
/* From tree-ssa-coalesce.c */
extern var_map coalesce_ssa_name (void);
#endif /* _TREE_SSA_LIVE_H */