diff options
Diffstat (limited to 'lib/Transforms')
| -rw-r--r-- | lib/Transforms/Vectorize/LoopVectorize.cpp | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/lib/Transforms/Vectorize/LoopVectorize.cpp b/lib/Transforms/Vectorize/LoopVectorize.cpp index 94e56a1..c9871e2 100644 --- a/lib/Transforms/Vectorize/LoopVectorize.cpp +++ b/lib/Transforms/Vectorize/LoopVectorize.cpp @@ -849,8 +849,19 @@ SingleBlockLoopVectorizer::vectorizeLoop(LoopVectorizationLegality *Legal) { BinaryOperator *BinOp = dyn_cast<BinaryOperator>(Inst); Value *A = getVectorValue(Inst->getOperand(0)); Value *B = getVectorValue(Inst->getOperand(1)); + // Use this vector value for all users of the original instruction. - WidenMap[Inst] = Builder.CreateBinOp(BinOp->getOpcode(), A, B); + Value *V = Builder.CreateBinOp(BinOp->getOpcode(), A, B); + WidenMap[Inst] = V; + + // Update the NSW, NUW and Exact flags. + BinaryOperator *VecOp = cast<BinaryOperator>(V); + if (isa<OverflowingBinaryOperator>(BinOp)) { + VecOp->setHasNoSignedWrap(BinOp->hasNoSignedWrap()); + VecOp->setHasNoUnsignedWrap(BinOp->hasNoUnsignedWrap()); + } + if (isa<PossiblyExactOperator>(VecOp)) + VecOp->setIsExact(BinOp->isExact()); break; } case Instruction::Select: { |