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Fix hoisting of void typed values, e.g. calls 

llvm-svn: 15263
This commit is contained in:
Chris Lattner 2004-07-27 07:38:32 +00:00
parent 89c0c0ae3f
commit 50eb771d37
1 changed files with 13 additions and 7 deletions
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20
llvm/lib/Transforms/Scalar/LICM.cpp
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@ -462,9 +462,12 @@ void LICM::sink(Instruction &I) {
// the value into a stack object to get it to do this.
// Firstly, we create a stack object to hold the value...
AllocaInst *AI = new AllocaInst(I.getType(), 0, I.getName(),
I.getParent()->getParent()->front().begin());
AllocaInst *AI = 0;
if (I.getType() != Type::VoidTy)
AI = new AllocaInst(I.getType(), 0, I.getName(),
I.getParent()->getParent()->front().begin());
// Secondly, insert load instructions for each use of the instruction
// outside of the loop.
while (!I.use_empty()) {
@ -522,12 +525,13 @@ void LICM::sink(Instruction &I) {
New = &I;
} else {
New = I.clone();
New->setName(I.getName()+".le");
if (!I.getName().empty())
New->setName(I.getName()+".le");
ExitBlock->getInstList().insert(InsertPt, New);
}
// Now that we have inserted the instruction, store it into the alloca
new StoreInst(New, AI, InsertPt);
if (AI) new StoreInst(New, AI, InsertPt);
}
}
}
@ -539,9 +543,11 @@ void LICM::sink(Instruction &I) {
}
// Finally, promote the fine value to SSA form.
std::vector<AllocaInst*> Allocas;
Allocas.push_back(AI);
PromoteMemToReg(Allocas, *DT, *DF, AA->getTargetData());
if (AI) {
std::vector<AllocaInst*> Allocas;
Allocas.push_back(AI);
PromoteMemToReg(Allocas, *DT, *DF, AA->getTargetData());
}
}
}