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simplify code and smallvectorize. 

llvm-svn: 149915
This commit is contained in:
Chris Lattner 2012-02-06 22:00:56 +00:00
parent 9228b3e37c
commit 72977a18db
1 changed files with 7 additions and 6 deletions
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13
clang/lib/CodeGen/CGExprConstant.cpp
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@ -1375,17 +1375,18 @@ llvm::Constant *CodeGenModule::EmitNullConstant(QualType T) {
return llvm::Constant::getNullValue(getTypes().ConvertTypeForMem(T));
if (const ConstantArrayType *CAT = Context.getAsConstantArrayType(T)) {
llvm::ArrayType *ATy =
cast<llvm::ArrayType>(getTypes().ConvertTypeForMem(T));
QualType ElementTy = CAT->getElementType();
llvm::Constant *Element = EmitNullConstant(ElementTy);
unsigned NumElements = CAT->getSize().getZExtValue();
std::vector<llvm::Constant *> Array(NumElements);
for (unsigned i = 0; i != NumElements; ++i)
Array[i] = Element;
llvm::ArrayType *ATy =
cast<llvm::ArrayType>(getTypes().ConvertTypeForMem(T));
if (Element->isNullValue())
return llvm::ConstantAggregateZero::get(ATy);
SmallVector<llvm::Constant *, 8> Array(NumElements, Element);
return llvm::ConstantArray::get(ATy, Array);
}