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scalarizePHI needs to insert the next ExtractElement in the same block

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as the BinaryOperator, *not* in the block where the IRBuilder is currently
inserting into. Fixes a bug where scalarizePHI would create instructions
that would not dominate all uses.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@182639 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Joey Gouly
2013-05-24 12:29:54 +00:00
parent 77226a03dc
commit 4a941316cd
2 changed files with 29 additions and 2 deletions
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6
lib/Transforms/InstCombine/InstCombineVectorOps.cpp
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@ -146,8 +146,10 @@ Instruction *InstCombiner::scalarizePHI(ExtractElementInst &EI, PHINode *PN) {
// vector operand.
BinaryOperator *B0 = cast<BinaryOperator>(PHIUser);
unsigned opId = (B0->getOperand(0) == PN) ? 1: 0;
Value *Op = Builder->CreateExtractElement(
B0->getOperand(opId), Elt, B0->getOperand(opId)->getName()+".Elt");
Value *Op = InsertNewInstWith(
ExtractElementInst::Create(B0->getOperand(opId), Elt,
B0->getOperand(opId)->getName() + ".Elt"),
*B0);
Value *newPHIUser = InsertNewInstWith(
BinaryOperator::Create(B0->getOpcode(), scalarPHI,Op),
*B0);