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[SCEV] Follow up of D71563: addressing post commit comment. NFC.

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This commit is contained in:
Sjoerd Meijer 2020-01-13 08:54:38 +00:00
parent 385e6ab82f
commit 374875f92a
1 changed files with 6 additions and 11 deletions
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17
lib/Analysis/ScalarEvolution.cpp
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@ -4507,17 +4507,6 @@ static Optional<BinaryOp> MatchBinaryOp(Value *V, DominatorTree &DT) {
if (!Op)
return None;
// Recognise intrinsic loop.decrement.reg, and as this has exactly the same
// semantics as a Sub, return a binary sub expression.
if (auto *II = dyn_cast<IntrinsicInst>(V)) {
switch (II->getIntrinsicID()) {
case Intrinsic::loop_decrement_reg:
return BinaryOp(Instruction::Sub, II->getOperand(0), II->getOperand(1));
default:
return None;
}
}
// Implementation detail: all the cleverness here should happen without
// creating new SCEV expressions -- our caller knowns tricks to avoid creating
// SCEV expressions when possible, and we should not break that.
@ -4586,6 +4575,12 @@ static Optional<BinaryOp> MatchBinaryOp(Value *V, DominatorTree &DT) {
break;
}
// Recognise intrinsic loop.decrement.reg, and as this has exactly the same
// semantics as a Sub, return a binary sub expression.
if (auto *II = dyn_cast<IntrinsicInst>(V))
if (II->getIntrinsicID() == Intrinsic::loop_decrement_reg)
return BinaryOp(Instruction::Sub, II->getOperand(0), II->getOperand(1));
return None;
}