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build wide strings with ConstantDataArray, just because we can. 

llvm-svn: 149928
This commit is contained in:
Chris Lattner 2012-02-06 22:52:04 +00:00
parent 8e7b34c7fc
commit 02cb1715ec
1 changed files with 18 additions and 12 deletions
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30
clang/lib/CodeGen/CodeGenModule.cpp
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@ -2072,20 +2072,26 @@ CodeGenModule::GetConstantArrayFromStringLiteral(const StringLiteral *E) {
cast<llvm::ArrayType>(getTypes().ConvertType(E->getType()));
llvm::Type *ElemTy = AType->getElementType();
unsigned NumElements = AType->getNumElements();
std::vector<llvm::Constant*> Elts;
Elts.reserve(NumElements);
for(unsigned i=0;i<E->getLength();++i) {
unsigned value = E->getCodeUnit(i);
llvm::Constant *C = llvm::ConstantInt::get(ElemTy,value,false);
Elts.push_back(C);
}
for(unsigned i=E->getLength();i<NumElements;++i) {
llvm::Constant *C = llvm::ConstantInt::get(ElemTy,0,false);
Elts.push_back(C);
// Wide strings have either 2-byte or 4-byte elements.
if (ElemTy->getPrimitiveSizeInBits() == 16) {
SmallVector<uint16_t, 32> Elements;
Elements.reserve(NumElements);
for(unsigned i = 0, e = E->getLength(); i != e; ++i)
Elements.push_back(E->getCodeUnit(i));
Elements.resize(NumElements);
return llvm::ConstantDataArray::get(VMContext, Elements);
}
return llvm::ConstantArray::get(AType, Elts);
assert(ElemTy->getPrimitiveSizeInBits() == 32);
SmallVector<uint32_t, 32> Elements;
Elements.reserve(NumElements);
for(unsigned i = 0, e = E->getLength(); i != e; ++i)
Elements.push_back(E->getCodeUnit(i));
Elements.resize(NumElements);
return llvm::ConstantDataArray::get(VMContext, Elements);
}
/// GetAddrOfConstantStringFromLiteral - Return a pointer to a