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| author | Richard Biener <rguenther@suse.de> | 2023-10-31 10:13:13 +0100 |
|---|---|---|
| committer | Richard Biener <rguenther@suse.de> | 2023-10-31 13:10:04 +0100 |
| commit | e3da1d7bb288c8c864f0284bc4bc5877b466a2f7 (patch) | |
| tree | 62538be0a67da1b32b62660c4977d05a7da05c4d /libgcc | |
| parent | 1cf5dc05c678232b52ac0572a94b891131ef48f0 (diff) | |
| download | gcc-e3da1d7bb288c8c864f0284bc4bc5877b466a2f7.zip gcc-e3da1d7bb288c8c864f0284bc4bc5877b466a2f7.tar.gz gcc-e3da1d7bb288c8c864f0284bc4bc5877b466a2f7.tar.bz2 | |
tree-optimization/112305 - SCEV cprop and conditional undefined overflow
The following adjusts final value replacement to also rewrite the
replacement to defined overflow behavior if there's conditionally
evaluated stmts (with possibly undefined overflow), not only when
we "folded casts". The patch hooks into expression_expensive for
this.
PR tree-optimization/112305
* tree-scalar-evolution.h (expression_expensive): Adjust.
* tree-scalar-evolution.cc (expression_expensive): Record
when we see a COND_EXPR.
(final_value_replacement_loop): When the replacement contains
a COND_EXPR, rewrite it to defined overflow.
* tree-ssa-loop-ivopts.cc (may_eliminate_iv): Adjust.
* gcc.dg/torture/pr112305.c: New testcase.
Diffstat (limited to 'libgcc')
0 files changed, 0 insertions, 0 deletions