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| author | Richard Biener <rguenther@suse.de> | 2024-05-31 10:14:25 +0200 |
|---|---|---|
| committer | Richard Biener <rguenther@suse.de> | 2024-05-31 14:12:35 +0200 |
| commit | 65dbe0ab7cdaf2aa84b09a74e594f0faacf1945c (patch) | |
| tree | bb1008578ce6915f48c545888d9a0ba4f0862106 /gcc/tree-if-conv.cc | |
| parent | e0ab5ee9bed5cbad9ae344a23ff0d302b8279d32 (diff) | |
| download | gcc-65dbe0ab7cdaf2aa84b09a74e594f0faacf1945c.zip gcc-65dbe0ab7cdaf2aa84b09a74e594f0faacf1945c.tar.gz gcc-65dbe0ab7cdaf2aa84b09a74e594f0faacf1945c.tar.bz2 | |
tree-optimization/115278 - fix DSE in if-conversion wrt volatiles
The following adds the missing guard for volatile stores to the
embedded DSE in the loop if-conversion pass.
PR tree-optimization/115278
* tree-if-conv.cc (ifcvt_local_dce): Do not DSE volatile stores.
* g++.dg/vect/pr115278.cc: New testcase.
Diffstat (limited to 'gcc/tree-if-conv.cc')
| -rw-r--r-- | gcc/tree-if-conv.cc | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/gcc/tree-if-conv.cc b/gcc/tree-if-conv.cc index 09d99fb..c4c3ed4 100644 --- a/gcc/tree-if-conv.cc +++ b/gcc/tree-if-conv.cc @@ -3381,7 +3381,9 @@ ifcvt_local_dce (class loop *loop) gimple_stmt_iterator gsiprev = gsi; gsi_prev (&gsiprev); stmt = gsi_stmt (gsi); - if (gimple_store_p (stmt) && gimple_vdef (stmt)) + if (!gimple_has_volatile_ops (stmt) + && gimple_store_p (stmt) + && gimple_vdef (stmt)) { tree lhs = gimple_get_lhs (stmt); ao_ref write; |