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re PR tree-optimization/23133 (recip does not factor division by function parameter)

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2005-08-01  Richard Guenther  <rguenther@suse.de>

	PR tree-optimization/23133
	* tree-ssa-math-opts.c (execute_cse_reciprocals): Walk
	current functions parameter decls to find defs to cse
	reciprocals of.

From-SVN: r102628
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Richard Guenther 2005-08-01 08:58:25 +00:00 committed by Richard Biener
parent ac264fef23
commit a8f82ec437
2 changed files with 18 additions and 1 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2005-08-01 Richard Guenther <rguenther@suse.de>
PR tree-optimization/23133
* tree-ssa-math-opts.c (execute_cse_reciprocals): Walk
current functions parameter decls to find defs to cse
reciprocals of.
2005-08-01 Richard Guenther <rguenther@suse.de>
PR tree-optimization/23109

12
gcc/tree-ssa-math-opts.c
View File

@ -122,10 +122,20 @@ static void
execute_cse_reciprocals (void)
{
basic_block bb;
tree arg;
if (flag_trapping_math)
calculate_dominance_info (CDI_POST_DOMINATORS);
if (single_succ_p (ENTRY_BLOCK_PTR))
for (arg = DECL_ARGUMENTS (cfun->decl); arg; arg = TREE_CHAIN (arg))
if (default_def (arg))
{
block_stmt_iterator bsi;
bsi = bsi_start (single_succ (ENTRY_BLOCK_PTR));
execute_cse_reciprocals_1 (&bsi, default_def (arg), false);
}
FOR_EACH_BB (bb)
{
block_stmt_iterator bsi;
@ -149,7 +159,7 @@ execute_cse_reciprocals (void)
if (TREE_CODE (stmt) == MODIFY_EXPR
&& (def = SINGLE_SSA_TREE_OPERAND (stmt, SSA_OP_DEF)) != NULL
&& FLOAT_TYPE_P (TREE_TYPE (def))
&& is_gimple_reg (def))
&& TREE_CODE (def) == SSA_NAME)
execute_cse_reciprocals_1 (&bsi, def, false);
}
}