diff options
Diffstat (limited to 'llvm/lib/Transforms')
| -rw-r--r-- | llvm/lib/Transforms/InstCombine/InstCombineSelect.cpp | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/llvm/lib/Transforms/InstCombine/InstCombineSelect.cpp b/llvm/lib/Transforms/InstCombine/InstCombineSelect.cpp index 2baa131bc99..776704d1efa 100644 --- a/llvm/lib/Transforms/InstCombine/InstCombineSelect.cpp +++ b/llvm/lib/Transforms/InstCombine/InstCombineSelect.cpp @@ -1070,7 +1070,7 @@ Instruction *InstCombiner::visitSelectInst(SelectInst &SI) { SelectPatternResult SPR = matchSelectPattern(&SI, LHS, RHS, &CastOp); auto SPF = SPR.Flavor; - if (SPF) { + if (SelectPatternResult::isMinOrMax(SPF)) { // Canonicalize so that type casts are outside select patterns. if (LHS->getType()->getPrimitiveSizeInBits() != SI.getType()->getPrimitiveSizeInBits()) { @@ -1091,11 +1091,15 @@ Instruction *InstCombiner::visitSelectInst(SelectInst &SI) { SI.getType()); return ReplaceInstUsesWith(SI, NewSI); } + } + if (SPF) { // MAX(MAX(a, b), a) -> MAX(a, b) // MIN(MIN(a, b), a) -> MIN(a, b) // MAX(MIN(a, b), a) -> a // MIN(MAX(a, b), a) -> a + // ABS(ABS(a)) -> ABS(a) + // NABS(NABS(a)) -> NABS(a) if (SelectPatternFlavor SPF2 = matchSelectPattern(LHS, LHS2, RHS2).Flavor) if (Instruction *R = FoldSPFofSPF(cast<Instruction>(LHS),SPF2,LHS2,RHS2, SI, SPF, RHS)) |
