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InferAddressSpaces: Avoid double map lookup 

llvm-svn: 293719
This commit is contained in:
Matt Arsenault 2017-01-31 23:48:44 +00:00
parent 2a46d81038
commit 517a290e4f
1 changed files with 4 additions and 6 deletions
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10
llvm/lib/Transforms/Scalar/InferAddressSpaces.cpp
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@ -583,14 +583,12 @@ Optional<unsigned> InferAddressSpaces::updateAddressSpace(
// of all its pointer operands.
unsigned NewAS = UninitializedAddressSpace;
for (Value *PtrOperand : getPointerOperands(V)) {
unsigned OperandAS;
if (InferredAddrSpace.count(PtrOperand))
OperandAS = InferredAddrSpace.lookup(PtrOperand);
else
OperandAS = PtrOperand->getType()->getPointerAddressSpace();
NewAS = joinAddressSpaces(NewAS, OperandAS);
auto I = InferredAddrSpace.find(PtrOperand);
unsigned OperandAS = I != InferredAddrSpace.end() ?
I->second : PtrOperand->getType()->getPointerAddressSpace();
// join(flat, *) = flat. So we can break if NewAS is already flat.
NewAS = joinAddressSpaces(NewAS, OperandAS);
if (NewAS == FlatAddrSpace)
break;
}