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| author | Richard Biener <rguenther@suse.de> | 2021-11-22 11:23:55 +0100 |
|---|---|---|
| committer | Richard Biener <rguenther@suse.de> | 2021-11-22 12:18:08 +0100 |
| commit | f456eaf2e0fb3ceb51c641fd348429bf59d215a9 (patch) | |
| tree | ed74f113f3f0e543b3e6260e10310be8e324736b /gcc/tree-ssa-dce.c | |
| parent | 4b1e14346a08554dc33f71fca980578a7a3e38a2 (diff) | |
| download | gcc-f456eaf2e0fb3ceb51c641fd348429bf59d215a9.zip gcc-f456eaf2e0fb3ceb51c641fd348429bf59d215a9.tar.gz gcc-f456eaf2e0fb3ceb51c641fd348429bf59d215a9.tar.bz2 | |
tree-optimization/103351 - avoid compare-debug issue wrt CD-DCE change
This avoids differences in the split edge of a cluster due to different
order of same key PHI args when sorting by sorting after the edge
destination index as second key.
2021-11-22 Richard Biener <rguenther@suse.de>
PR tree-optimization/103351
* tree-ssa-dce.c (sort_phi_args): Sort after e->dest_idx as
second key.
* g++.dg/torture/pr103351.C: New testcase.
Diffstat (limited to 'gcc/tree-ssa-dce.c')
| -rw-r--r-- | gcc/tree-ssa-dce.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/gcc/tree-ssa-dce.c b/gcc/tree-ssa-dce.c index dbf02c4..e3e6f09 100644 --- a/gcc/tree-ssa-dce.c +++ b/gcc/tree-ssa-dce.c @@ -1626,6 +1626,10 @@ sort_phi_args (const void *a_, const void *b_) return -1; else if (ha > hb) return 1; + else if (a->first->dest_idx < b->first->dest_idx) + return -1; + else if (a->first->dest_idx > b->first->dest_idx) + return 1; else return 0; } |