diff options
| author | Dimitry Andric <dim@FreeBSD.org> | 2021-06-19 10:06:00 +0000 |
|---|---|---|
| committer | Dimitry Andric <dim@FreeBSD.org> | 2021-06-19 18:09:28 +0000 |
| commit | 23408297fbf3089f0388a8873b02fa75ab3f5bb9 (patch) | |
| tree | 73e65506c89dcf58daeb8b774b921a8d688d133b /contrib/llvm-project/llvm/lib/Transforms/InstCombine/InstCombineSelect.cpp | |
| parent | cac129e6030095c33e95c5ce1cdcb9c5c21efce9 (diff) | |
| parent | e4bbddaec8689e1b24f25e88958bea700e989542 (diff) | |
Diffstat (limited to 'contrib/llvm-project/llvm/lib/Transforms/InstCombine/InstCombineSelect.cpp')
| -rw-r--r-- | contrib/llvm-project/llvm/lib/Transforms/InstCombine/InstCombineSelect.cpp | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/contrib/llvm-project/llvm/lib/Transforms/InstCombine/InstCombineSelect.cpp b/contrib/llvm-project/llvm/lib/Transforms/InstCombine/InstCombineSelect.cpp index f26c194d31b9..5f174aae09ec 100644 --- a/contrib/llvm-project/llvm/lib/Transforms/InstCombine/InstCombineSelect.cpp +++ b/contrib/llvm-project/llvm/lib/Transforms/InstCombine/InstCombineSelect.cpp @@ -1095,7 +1095,10 @@ static Instruction *canonicalizeAbsNabs(SelectInst &Sel, ICmpInst &Cmp, /// TODO: Wrapping flags could be preserved in some cases with better analysis. Instruction *InstCombinerImpl::foldSelectValueEquivalence(SelectInst &Sel, ICmpInst &Cmp) { - if (!Cmp.isEquality()) + // Value equivalence substitution requires an all-or-nothing replacement. + // It does not make sense for a vector compare where each lane is chosen + // independently. + if (!Cmp.isEquality() || Cmp.getType()->isVectorTy()) return nullptr; // Canonicalize the pattern to ICMP_EQ by swapping the select operands. |