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tree-optimization/66502 - add testcase 

This adds the second testcase which we now also handle eliminating
a redundant PHI node.

2022-01-03  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/66502
	* gcc.dg/tree-ssa/ssa-fre-98.c: New testcase.
This commit is contained in:
Richard Biener 2022-01-03 10:48:57 +01:00
parent 7adcbafe45
commit cd83fd98a7
1 changed files with 18 additions and 0 deletions
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18
gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-98.c Normal file
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/* { dg-do compile } */
/* { dg-options "-O2 -fdump-tree-fre1-details" } */
int foo (int a, int s, unsigned int k)
{
int i = a, j = a;
do
{
i += s;
j += j;
j -= a;
}
while (k--);
return j+i;
}
/* We want the redundant PHI for j to disappear. */
/* { dg-final { scan-tree-dump "Replaced redundant PHI node defining j" "fre1" } } */