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//===-- LLVMContext.cpp - Implement LLVMContext -----------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements LLVMContext, as a wrapper around the opaque
// class LLVMContextImpl.
//
//===----------------------------------------------------------------------===//
#include "llvm/LLVMContext.h"
#include "llvm/Constants.h"
#include "llvm/DerivedTypes.h"
#include "llvm/Instruction.h"
#include "llvm/Metadata.h"
#include "llvm/Support/ManagedStatic.h"
#include "LLVMContextImpl.h"
#include <cstdarg>
using namespace llvm;
static ManagedStatic<LLVMContext> GlobalContext;
LLVMContext& llvm::getGlobalContext() {
return *GlobalContext;
}
LLVMContext::LLVMContext() : pImpl(new LLVMContextImpl(*this)) { }
LLVMContext::~LLVMContext() { delete pImpl; }
// Constant accessors
// Constructor to create a '0' constant of arbitrary type...
static const uint64_t zero[2] = {0, 0};
Constant* LLVMContext::getNullValue(const Type* Ty) {
switch (Ty->getTypeID()) {
case Type::IntegerTyID:
return ConstantInt::get(Ty, 0);
case Type::FloatTyID:
return ConstantFP::get(Ty->getContext(), APFloat(APInt(32, 0)));
case Type::DoubleTyID:
return ConstantFP::get(Ty->getContext(), APFloat(APInt(64, 0)));
case Type::X86_FP80TyID:
return ConstantFP::get(Ty->getContext(), APFloat(APInt(80, 2, zero)));
case Type::FP128TyID:
return ConstantFP::get(Ty->getContext(),
APFloat(APInt(128, 2, zero), true));
case Type::PPC_FP128TyID:
return ConstantFP::get(Ty->getContext(), APFloat(APInt(128, 2, zero)));
case Type::PointerTyID:
return ConstantPointerNull::get(cast<PointerType>(Ty));
case Type::StructTyID:
case Type::ArrayTyID:
case Type::VectorTyID:
return ConstantAggregateZero::get(Ty);
default:
// Function, Label, or Opaque type?
assert(!"Cannot create a null constant of that type!");
return 0;
}
}
Constant* LLVMContext::getAllOnesValue(const Type* Ty) {
if (const IntegerType* ITy = dyn_cast<IntegerType>(Ty))
return ConstantInt::get(*this, APInt::getAllOnesValue(ITy->getBitWidth()));
std::vector<Constant*> Elts;
const VectorType* VTy = cast<VectorType>(Ty);
Elts.resize(VTy->getNumElements(), getAllOnesValue(VTy->getElementType()));
assert(Elts[0] && "Not a vector integer type!");
return cast<ConstantVector>(ConstantVector::get(Elts));
}
// MDNode accessors
MDNode* LLVMContext::getMDNode(Value* const* Vals, unsigned NumVals) {
return pImpl->getMDNode(Vals, NumVals);
}
// MDString accessors
MDString* LLVMContext::getMDString(const StringRef &Str) {
return pImpl->getMDString(Str.data(), Str.size());
}
void LLVMContext::erase(MDString *M) {
pImpl->erase(M);
}
void LLVMContext::erase(MDNode *M) {
pImpl->erase(M);
}
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