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re PR tree-optimization/79389 (30% performance regression in SciMark2 MonteCarlo) 

2017-02-24  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/79389
	* gimple-ssa-split-paths.c (is_feasible_trace): Properly skip
	debug insns.

From-SVN: r245713
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Richard Biener 2017-02-24 11:51:33 +00:00 committed by Richard Biener
parent 2af8fd5cdf
commit d081521703
2 changed files with 17 additions and 5 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2017-02-24 Richard Biener <rguenther@suse.de>
PR tree-optimization/79389
* gimple-ssa-split-paths.c (is_feasible_trace): Properly skip
debug insns.
2017-02-24 Aldy Hernandez <aldyh@redhat.com>
* tree-ssa-loop-niter.c (number_of_iterations_exit): Update

16
gcc/gimple-ssa-split-paths.c
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@ -249,6 +249,8 @@ is_feasible_trace (basic_block bb)
imm_use_iterator iter2;
FOR_EACH_IMM_USE_FAST (use2_p, iter2, gimple_phi_result (stmt))
{
if (is_gimple_debug (USE_STMT (use2_p)))
continue;
basic_block use_bb = gimple_bb (USE_STMT (use2_p));
if (use_bb != bb
&& dominated_by_p (CDI_DOMINATORS, bb, use_bb))
@ -280,11 +282,15 @@ is_feasible_trace (basic_block bb)
use_operand_p use_p;
imm_use_iterator iter;
FOR_EACH_IMM_USE_FAST (use_p, iter, op)
if (gimple_bb (USE_STMT (use_p)) == bb)
{
found_cprop_opportunity = true;
break;
}
{
if (is_gimple_debug (USE_STMT (use_p)))
continue;
if (gimple_bb (USE_STMT (use_p)) == bb)
{
found_cprop_opportunity = true;
break;
}
}
}
if (found_cprop_opportunity)
break;