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gimple.h (gimple_asm_clobbers_memory_p): Declare.

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* gimple.h (gimple_asm_clobbers_memory_p): Declare.
	* gimple.c (gimple_asm_clobbers_memory_p): Define.
	* ipa-pure-const.c (check_stmt): Call it.
	* tree-ssa-operands.c (get_asm_expr_operands): Likewise.

From-SVN: r172496
This commit is contained in:
Nathan Froyd 2011-04-15 14:27:55 +00:00 • committed by Nathan Froyd
parent 0f14104669
commit edcdea5b00
5 changed files with 32 additions and 19 deletions
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7
gcc/ChangeLog
View file

@ -1,3 +1,10 @@
2011-04-15 Nathan Froyd <froydnj@codesourcery.com>
* gimple.h (gimple_asm_clobbers_memory_p): Declare.
* gimple.c (gimple_asm_clobbers_memory_p): Define.
* ipa-pure-const.c (check_stmt): Call it.
* tree-ssa-operands.c (get_asm_expr_operands): Likewise.
2011-04-15 Richard Guenther <rguenther@suse.de>
PR tree-optimization/48290

17
gcc/gimple.c
View file

@ -5142,4 +5142,21 @@ gimple_call_builtin_p (gimple stmt, enum built_in_function code)
&& DECL_FUNCTION_CODE (fndecl) == code);
}
/* Return true if STMT clobbers memory. STMT is required to be a
GIMPLE_ASM. */
bool
gimple_asm_clobbers_memory_p (const_gimple stmt)
{
unsigned i;
for (i = 0; i < gimple_asm_nclobbers (stmt); i++)
{
tree op = gimple_asm_clobber_op (stmt, i);
if (strcmp (TREE_STRING_POINTER (TREE_VALUE (op)), "memory") == 0)
return true;
}
return false;
}
#include "gt-gimple.h"

1
gcc/gimple.h
View file

@ -973,6 +973,7 @@ extern bool walk_stmt_load_store_ops (gimple, void *,
bool (*)(gimple, tree, void *));
extern bool gimple_ior_addresses_taken (bitmap, gimple);
extern bool gimple_call_builtin_p (gimple, enum built_in_function);
extern bool gimple_asm_clobbers_memory_p (const_gimple);
/* In gimplify.c */
extern tree create_tmp_var_raw (tree, const char *);

15
gcc/ipa-pure-const.c
View file

@ -639,7 +639,6 @@ static void
check_stmt (gimple_stmt_iterator *gsip, funct_state local, bool ipa)
{
gimple stmt = gsi_stmt (*gsip);
unsigned int i = 0;
if (is_gimple_debug (stmt))
return;
@ -693,16 +692,12 @@ check_stmt (gimple_stmt_iterator *gsip, funct_state local, bool ipa)
}
break;
case GIMPLE_ASM:
for (i = 0; i < gimple_asm_nclobbers (stmt); i++)
if (gimple_asm_clobbers_memory_p (stmt))
{
tree op = gimple_asm_clobber_op (stmt, i);
if (strcmp (TREE_STRING_POINTER (TREE_VALUE (op)), "memory") == 0)
{
if (dump_file)
fprintf (dump_file, " memory asm clobber is not const/pure");
/* Abandon all hope, ye who enter here. */
local->pure_const_state = IPA_NEITHER;
}
if (dump_file)
fprintf (dump_file, " memory asm clobber is not const/pure");
/* Abandon all hope, ye who enter here. */
local->pure_const_state = IPA_NEITHER;
}
if (gimple_asm_volatile_p (stmt))
{

11
gcc/tree-ssa-operands.c
View file

@ -832,15 +832,8 @@ get_asm_expr_operands (gimple stmt)
}
/* Clobber all memory and addressable symbols for asm ("" : : : "memory"); */
for (i = 0; i < gimple_asm_nclobbers (stmt); i++)
{
tree link = gimple_asm_clobber_op (stmt, i);
if (strcmp (TREE_STRING_POINTER (TREE_VALUE (link)), "memory") == 0)
{
add_virtual_operand (stmt, opf_def);
break;
}
}
if (gimple_asm_clobbers_memory_p (stmt))
add_virtual_operand (stmt, opf_def);
}