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[LICM][NFC] Reorder checks to speed up things slightly

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Side effect check is made faster than potentially heavy other checks.
This commit is contained in:
Max Kazantsev 2020-04-21 11:25:38 +07:00
parent 747225250b
commit 4c8fb07eca
1 changed files with 3 additions and 3 deletions
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6
lib/Transforms/Scalar/LICM.cpp
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@ -497,10 +497,10 @@ bool llvm::sinkRegion(DomTreeNode *N, AliasAnalysis *AA, LoopInfo *LI,
// operands of the instruction are loop invariant.
//
bool FreeInLoop = false;
if (isNotUsedOrFreeInLoop(I, CurLoop, SafetyInfo, TTI, FreeInLoop) &&
if (!I.mayHaveSideEffects() &&
isNotUsedOrFreeInLoop(I, CurLoop, SafetyInfo, TTI, FreeInLoop) &&
canSinkOrHoistInst(I, AA, DT, CurLoop, CurAST, MSSAU, true, &Flags,
ORE) &&
!I.mayHaveSideEffects()) {
ORE)) {
if (sink(I, LI, DT, CurLoop, SafetyInfo, MSSAU, ORE)) {
if (!FreeInLoop) {
++II;