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| author | Sanjay Patel <spatel@rotateright.com> | 2023-03-01 08:32:27 -0500 |
|---|---|---|
| committer | Sanjay Patel <spatel@rotateright.com> | 2023-03-01 08:54:23 -0500 |
| commit | 452279efe21a61c7e17189da99347f7755f27cb0 (patch) | |
| tree | b2c178369b8e40fa7a0264b4bf2516909a5056ab /clang/unittests/libclang/LibclangTest.cpp | |
| parent | 83bbd3fdbd75295669cf97967c38810d427c5c25 (diff) | |
| download | llvm-452279efe21a61c7e17189da99347f7755f27cb0.zip llvm-452279efe21a61c7e17189da99347f7755f27cb0.tar.gz llvm-452279efe21a61c7e17189da99347f7755f27cb0.tar.bz2 | |
[InstCombine] prevent miscompiles from select-of-div/rem transform
This avoids the danger shown in issue #60906.
There were no regression tests for these patterns, so these potential
failures have been around for a long time.
We freeze the condition and preserve the optimization because
getting rid of a div/rem is always a win.
Here are a couple of examples that can be corrected by freezing the
condition:
https://alive2.llvm.org/ce/z/sXHTTC
Differential Revision: https://reviews.llvm.org/D144671
Diffstat (limited to 'clang/unittests/libclang/LibclangTest.cpp')
0 files changed, 0 insertions, 0 deletions