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| author | Jakub Jelinek <jakub@redhat.com> | 2020-05-06 09:31:19 +0200 |
|---|---|---|
| committer | Jakub Jelinek <jakub@redhat.com> | 2020-05-06 09:31:19 +0200 |
| commit | f14848aea70066777faf201c0b6eb3c5520bfab9 (patch) | |
| tree | 40a788d722939d41065beb0c1b63add3e11e28e6 /gcc/config.gcc | |
| parent | 366386c7a970bf6a32c5a2abb714ca6c7f4e7790 (diff) | |
| download | gcc-f14848aea70066777faf201c0b6eb3c5520bfab9.zip gcc-f14848aea70066777faf201c0b6eb3c5520bfab9.tar.gz gcc-f14848aea70066777faf201c0b6eb3c5520bfab9.tar.bz2 | |
combine: Don't replace SET_SRC with REG_EQUAL note content if SET_SRC has side-effects [PR94873]
There were some discussions about whether REG_EQUAL notes are valid on insns with a single
set which contains auto-inc-dec side-effects in the SET_SRC and the majority thinks that
it should be valid. So, this patch fixes the combiner to punt in that case, because otherwise
the auto-inc-dec side-effects from the SET_SRC are lost.
2020-05-06 Jakub Jelinek <jakub@redhat.com>
PR rtl-optimization/94873
* combine.c (combine_instructions): Don't optimize using REG_EQUAL
note if SET_SRC (set) has side-effects.
* gcc.dg/pr94873.c: New test.
Diffstat (limited to 'gcc/config.gcc')
0 files changed, 0 insertions, 0 deletions