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[NFC][ScalarizeMaskedMemIntrin] scalarizeMaskedCompressStore(): port to SplitBlockAndInsertIfThen() 

Makes Dominator Tree preservation in a followup patch somewhat easier.
This commit is contained in:
Roman Lebedev 2021-01-28 22:59:15 +03:00
parent 2e4bb3f119
commit 573f74117b
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GPG Key ID: 083C3EBB4A1689E0
1 changed files with 10 additions and 9 deletions
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19
llvm/lib/Transforms/Scalar/ScalarizeMaskedMemIntrin.cpp
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@ -801,10 +801,13 @@ static void scalarizeMaskedCompressStore(CallInst *CI, bool &ModifiedDT) {
// %EltAddr = getelementptr i32* %1, i32 0
// %store i32 %OneElt, i32* %EltAddr
//
BasicBlock *CondBlock =
IfBlock->splitBasicBlock(InsertPt->getIterator(), "cond.store");
Builder.SetInsertPoint(InsertPt);
Instruction *ThenTerm =
SplitBlockAndInsertIfThen(Predicate, InsertPt, /*Unreachable=*/false);
BasicBlock *CondBlock = ThenTerm->getParent();
CondBlock->setName("cond.store");
Builder.SetInsertPoint(CondBlock->getTerminator());
Value *OneElt = Builder.CreateExtractElement(Src, Idx);
Builder.CreateAlignedStore(OneElt, Ptr, Align(1));
@ -814,15 +817,13 @@ static void scalarizeMaskedCompressStore(CallInst *CI, bool &ModifiedDT) {
NewPtr = Builder.CreateConstInBoundsGEP1_32(EltTy, Ptr, 1);
// Create "else" block, fill it in the next iteration
BasicBlock *NewIfBlock =
CondBlock->splitBasicBlock(InsertPt->getIterator(), "else");
Builder.SetInsertPoint(InsertPt);
Instruction *OldBr = IfBlock->getTerminator();
BranchInst::Create(CondBlock, NewIfBlock, Predicate, OldBr);
OldBr->eraseFromParent();
BasicBlock *NewIfBlock = ThenTerm->getSuccessor(0);
NewIfBlock->setName("else");
BasicBlock *PrevIfBlock = IfBlock;
IfBlock = NewIfBlock;
Builder.SetInsertPoint(NewIfBlock, NewIfBlock->begin());
// Add a PHI for the pointer if this isn't the last iteration.
if ((Idx + 1) != VectorWidth) {
PHINode *PtrPhi = Builder.CreatePHI(Ptr->getType(), 2, "ptr.phi.else");