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| author | Richard Biener <rguenther@suse.de> | 2022-01-03 10:48:57 +0100 |
|---|---|---|
| committer | Richard Biener <rguenther@suse.de> | 2022-01-03 10:50:21 +0100 |
| commit | cd83fd98a7e769ac7ded28377984f68238812a26 (patch) | |
| tree | 9c0de9705bb6e75518704db89170118ffff81392 | |
| parent | 7adcbafe45f8001b698967defe682687b52c0007 (diff) | |
| download | gcc-cd83fd98a7e769ac7ded28377984f68238812a26.zip gcc-cd83fd98a7e769ac7ded28377984f68238812a26.tar.gz gcc-cd83fd98a7e769ac7ded28377984f68238812a26.tar.bz2 | |
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.
| -rw-r--r-- | gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-98.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-98.c b/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-98.c new file mode 100644 index 0000000..3d28609 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-98.c @@ -0,0 +1,18 @@ +/* { 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" } } */ |