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| author | Sanjay Patel <spatel@rotateright.com> | 2022-07-01 16:24:34 -0400 |
|---|---|---|
| committer | Sanjay Patel <spatel@rotateright.com> | 2022-07-01 16:24:34 -0400 |
| commit | 9c8a39c67b599b047510b181383a44547b2eead4 (patch) | |
| tree | 00e8a8d0d2f4972e7d0a5d144e913f1abf91f7e8 /llvm/tools/llvm-objdump/llvm-objdump.cpp | |
| parent | feb4b628ac0901f9bd8925b580adc55244c2d694 (diff) | |
| download | llvm-9c8a39c67b599b047510b181383a44547b2eead4.zip llvm-9c8a39c67b599b047510b181383a44547b2eead4.tar.gz llvm-9c8a39c67b599b047510b181383a44547b2eead4.tar.bz2 | |
[InstCombine] restrict select of bit-tests to constant shift amounts
This transform is responsible for a long-standing miscompile
as discussed in issue #47012 (was bugzilla #47668).
There was a proposal to correct it in D88432, but that was
abandoned and there hasn't been any recent activity to fix
it AFAICT.
The original patch D45108 started with a constant-shift-only
restriction and only expanded during review, so I don't think
there's much risk of perf regression on the motivating code.
Diffstat (limited to 'llvm/tools/llvm-objdump/llvm-objdump.cpp')
0 files changed, 0 insertions, 0 deletions