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| author | Richard Biener <rguenther@suse.de> | 2022-01-12 08:10:19 +0100 |
|---|---|---|
| committer | Richard Biener <rguenther@suse.de> | 2022-01-12 08:11:31 +0100 |
| commit | 45ddb395187f8f5f278880fe1422d8958ac35da6 (patch) | |
| tree | 5503f03b251393abaa958eb87034aa266dac9920 | |
| parent | 31aa664add55542e8e561cd599aa6a2a4e683d73 (diff) | |
| download | gcc-45ddb395187f8f5f278880fe1422d8958ac35da6.zip gcc-45ddb395187f8f5f278880fe1422d8958ac35da6.tar.gz gcc-45ddb395187f8f5f278880fe1422d8958ac35da6.tar.bz2 | |
tree-optimization/76174 - testcase for fixed PR
This adds a testcase for the fixed PR, VN now gets us the transform
via IV equality plus predication.
2022-01-12 Richard Biener <rguenther@suse.de>
PR tree-optimization/76174
* gcc.dg/tree-ssa/pr76174.c: New testcase.
| -rw-r--r-- | gcc/testsuite/gcc.dg/tree-ssa/pr76174.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/pr76174.c b/gcc/testsuite/gcc.dg/tree-ssa/pr76174.c new file mode 100644 index 0000000..17a4a0f --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/pr76174.c @@ -0,0 +1,22 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -fdump-tree-cddce1" } */ + +void foo(); + +void l(unsigned int r) { + unsigned int q = 0; + unsigned int c = r; + for (unsigned int x = 0; x<r; x++) { + if (q == c) { + foo(); + c *= 2; + } + q++; + } +} + +/* We should be able to elide the body of the function by means of + figuring out the equality between the two IVs and then simplifying + the q == c test. */ +/* { dg-final { scan-tree-dump-not "foo" "cddce1" } } */ +/* { dg-final { scan-tree-dump-times "bb" 1 "cddce1" } } */ |