| //===-- 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; |
| } |