diff options
| author | Richard Biener <rguenther@suse.de> | 2022-01-26 15:34:54 +0100 |
|---|---|---|
| committer | Richard Biener <rguenther@suse.de> | 2022-05-05 14:41:27 +0200 |
| commit | ee1cb43bc76de800efa0ade687b0cd28e62a5f82 (patch) | |
| tree | d65098810337ddcdeb91b4dfbfd31c103879810d /gcc/fortran/openmp.cc | |
| parent | 92fff39f06449f907d8781a5dcaad0e8b9743480 (diff) | |
| download | gcc-ee1cb43bc76de800efa0ade687b0cd28e62a5f82.zip gcc-ee1cb43bc76de800efa0ade687b0cd28e62a5f82.tar.gz gcc-ee1cb43bc76de800efa0ade687b0cd28e62a5f82.tar.bz2 | |
tree-optimization/104162 - CSE of &MEM[ptr].a[i] and ptr + CST
This adds the capability to value-numbering of treating complex
address expressions where the offset becomes invariant as equal
to a POINTER_PLUS_EXPR. This restores CSE that is now prevented
by early lowering of &MEM[ptr + CST] to a POINTER_PLUS_EXPR.
Unfortunately this regresses gcc.dg/asan/pr99673.c again, so
the testcase is adjusted accordingly.
2022-01-26 Richard Biener <rguenther@suse.de>
PR tree-optimization/104162
* tree-ssa-sccvn.cc (vn_reference_lookup): Handle
&MEM[_1 + 5].a[i] like a POINTER_PLUS_EXPR if the offset
becomes invariant.
(vn_reference_insert): Likewise.
* gcc.dg/tree-ssa/ssa-fre-99.c: New testcase.
* gcc.dg/asan/pr99673.c: Adjust.
Diffstat (limited to 'gcc/fortran/openmp.cc')
0 files changed, 0 insertions, 0 deletions