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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/Instruction.h"
#include "llvm/Support/ManagedStatic.h"
#include "LLVMContextImpl.h"
#include <set>
using namespace llvm;
static ManagedStatic<LLVMContext> GlobalContext;
LLVMContext& llvm::getGlobalContext() {
return *GlobalContext;
}
LLVMContext::LLVMContext() : pImpl(new LLVMContextImpl(*this)) { }
LLVMContext::~LLVMContext() { delete pImpl; }
GetElementPtrConstantExpr::GetElementPtrConstantExpr
(Constant *C,
const std::vector<Constant*> &IdxList,
const Type *DestTy)
: ConstantExpr(DestTy, Instruction::GetElementPtr,
OperandTraits<GetElementPtrConstantExpr>::op_end(this)
- (IdxList.size()+1),
IdxList.size()+1) {
OperandList[0] = C;
for (unsigned i = 0, E = IdxList.size(); i != E; ++i)
OperandList[i+1] = IdxList[i];
}
bool LLVMContext::RemoveDeadMetadata() {
std::vector<const MDNode *> DeadMDNodes;
bool Changed = false;
while (1) {
for (LLVMContextImpl::MDNodeMapTy::MapTy::iterator
I = pImpl->MDNodes.map_begin(),
E = pImpl->MDNodes.map_end(); I != E; ++I) {
const MDNode *N = cast<MDNode>(I->second);
if (N->use_empty())
DeadMDNodes.push_back(N);
}
if (DeadMDNodes.empty())
return Changed;
while (!DeadMDNodes.empty()) {
const MDNode *N = DeadMDNodes.back(); DeadMDNodes.pop_back();
delete N;
}
}
return Changed;
}
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