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Add helper functions to ConstantInt and ConstantFP to accept strings. 

llvm-svn: 79212
This commit is contained in:
Erick Tryzelaar 2009-08-16 23:36:33 +00:00
parent b90731117c
commit fc2280d874
2 changed files with 27 additions and 0 deletions
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6
llvm/include/llvm/Constants.h
View File

@ -83,6 +83,11 @@ public:
/// Return a ConstantInt with the specified value and an implied Type. The
/// type is the integer type that corresponds to the bit width of the value.
static ConstantInt* get(LLVMContext &Context, const APInt& V);
/// Return a ConstantInt constructed from the string strStart with the given
/// radix.
static ConstantInt* get(const IntegerType* Ty, const StringRef& Str,
uint8_t radix);
/// If Ty is a vector type, return a Constant with a splat of the given
/// value. Otherwise return a ConstantInt for the given value.
@ -250,6 +255,7 @@ public:
/// only be used for simple constant values like 2.0/1.0 etc, that are
/// known-valid both as host double and as the target format.
static Constant* get(const Type* Ty, double V);
static Constant* get(const Type* Ty, const StringRef& Str);
static ConstantFP* get(LLVMContext &Context, const APFloat& V);
static ConstantFP* getNegativeZero(const Type* Ty);

21
llvm/lib/VMCore/Constants.cpp
View File

@ -314,6 +314,11 @@ Constant* ConstantInt::get(const Type* Ty, const APInt& V) {
return C;
}
ConstantInt* ConstantInt::get(const IntegerType* Ty, const StringRef& Str,
uint8_t radix) {
return get(Ty->getContext(), APInt(Ty->getBitWidth(), Str, radix));
}
//===----------------------------------------------------------------------===//
// ConstantFP
//===----------------------------------------------------------------------===//
@ -352,6 +357,22 @@ Constant* ConstantFP::get(const Type* Ty, double V) {
return C;
}
Constant* ConstantFP::get(const Type* Ty, const StringRef& Str) {
LLVMContext &Context = Ty->getContext();
APFloat FV(*TypeToFloatSemantics(Ty->getScalarType()), Str);
Constant *C = get(Context, FV);
// For vectors, broadcast the value.
if (const VectorType *VTy = dyn_cast<VectorType>(Ty))
return ConstantVector::get(
std::vector<Constant *>(VTy->getNumElements(), C));
return C;
}
ConstantFP* ConstantFP::getNegativeZero(const Type* Ty) {
LLVMContext &Context = Ty->getContext();
APFloat apf = cast <ConstantFP>(Constant::getNullValue(Ty))->getValueAPF();