| //===-- CGBuilder.h - Choose IRBuilder implementation ----------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef CLANG_CODEGEN_CGBUILDER_H |
| #define CLANG_CODEGEN_CGBUILDER_H |
| |
| #include "llvm/Support/IRBuilder.h" |
| |
| namespace clang { |
| namespace CodeGen { |
| |
| // Don't preserve names on values in an optimized build. |
| #ifdef NDEBUG |
| typedef llvm::IRBuilder<false> CGBuilderSuperTy; |
| #else |
| typedef llvm::IRBuilder<> CGBuilderSuperTy; |
| #endif |
| |
| /// IR generation's wrapper around an LLVM IRBuilder. |
| class CGBuilderTy : public CGBuilderSuperTy { |
| public: |
| CGBuilderTy(llvm::LLVMContext &Context) : CGBuilderSuperTy(Context) {} |
| CGBuilderTy(llvm::BasicBlock *Block) : CGBuilderSuperTy(Block) {} |
| CGBuilderTy(llvm::BasicBlock *Block, llvm::BasicBlock::iterator Point) |
| : CGBuilderSuperTy(Block, Point) {} |
| |
| CGBuilderTy(const CGBuilderTy &Builder) |
| : CGBuilderSuperTy(Builder.getContext()) { |
| |
| if (Builder.GetInsertBlock()) |
| SetInsertPoint(Builder.GetInsertBlock(), Builder.GetInsertPoint()); |
| } |
| |
| /// A saved insertion point. |
| class InsertPoint { |
| llvm::BasicBlock *Block; |
| llvm::BasicBlock::iterator Point; |
| |
| public: |
| InsertPoint(llvm::BasicBlock *Block, llvm::BasicBlock::iterator Point) |
| : Block(Block), Point(Point) {} |
| |
| bool isSet() const { return (Block != 0); } |
| llvm::BasicBlock *getBlock() const { return Block; } |
| llvm::BasicBlock::iterator getPoint() const { return Point; } |
| }; |
| |
| InsertPoint saveIP() const { |
| return InsertPoint(GetInsertBlock(), GetInsertPoint()); |
| } |
| |
| InsertPoint saveAndClearIP() { |
| InsertPoint IP(GetInsertBlock(), GetInsertPoint()); |
| ClearInsertionPoint(); |
| return IP; |
| } |
| |
| void restoreIP(InsertPoint IP) { |
| if (IP.isSet()) |
| SetInsertPoint(IP.getBlock(), IP.getPoint()); |
| else |
| ClearInsertionPoint(); |
| } |
| }; |
| |
| } // end namespace CodeGen |
| } // end namespace clang |
| |
| #endif |