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| author | Noah Goldstein <goldstein.w.n@gmail.com> | 2023-04-30 09:33:00 -0500 |
|---|---|---|
| committer | Noah Goldstein <goldstein.w.n@gmail.com> | 2023-04-30 10:06:45 -0500 |
| commit | f1dfa4938a2f608b6288cf55da905a440b2763d6 (patch) | |
| tree | fc8e7e5d01a45f3aafbb90fa1bc569f47a420f33 /llvm/lib/Analysis/ValueTracking.cpp | |
| parent | ea5a0d4b909fb71376686a3c34bbaf05ed47fb3f (diff) | |
| download | llvm-f1dfa4938a2f608b6288cf55da905a440b2763d6.zip llvm-f1dfa4938a2f608b6288cf55da905a440b2763d6.tar.gz llvm-f1dfa4938a2f608b6288cf55da905a440b2763d6.tar.bz2 | |
[ValueTracking] Add logic for `isKnownNonZero(sshl.sat/ushl.sat X, Y)`
`(sshl/ushl X, Y) != 0` -> `X != 0`
Alive2 Links
https://alive2.llvm.org/ce/z/4WLM2p
https://alive2.llvm.org/ce/z/BHFng4
Reviewed By: nikic
Differential Revision: https://reviews.llvm.org/D149411
Diffstat (limited to 'llvm/lib/Analysis/ValueTracking.cpp')
| -rw-r--r-- | llvm/lib/Analysis/ValueTracking.cpp | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/llvm/lib/Analysis/ValueTracking.cpp b/llvm/lib/Analysis/ValueTracking.cpp index da369c91..0439f4e 100644 --- a/llvm/lib/Analysis/ValueTracking.cpp +++ b/llvm/lib/Analysis/ValueTracking.cpp @@ -2920,6 +2920,8 @@ bool isKnownNonZero(const Value *V, const APInt &DemandedElts, unsigned Depth, case Instruction::Call: if (auto *II = dyn_cast<IntrinsicInst>(I)) { switch (II->getIntrinsicID()) { + case Intrinsic::sshl_sat: + case Intrinsic::ushl_sat: case Intrinsic::abs: case Intrinsic::bitreverse: case Intrinsic::bswap: |