1 //===-- CGBuilder.h - Choose IRBuilder implementation ----------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 #ifndef CLANG_CODEGEN_CGBUILDER_H 11 #define CLANG_CODEGEN_CGBUILDER_H 12 13 #include "llvm/IR/IRBuilder.h" 14 15 namespace clang { 16 namespace CodeGen { 17 18 class CodeGenFunction; 19 20 /// \brief This is an IRBuilder insertion helper that forwards to 21 /// CodeGenFunction::InsertHelper, which adds nesessary metadata to 22 /// instructions. 23 template <bool PreserveNames> 24 class CGBuilderInserter 25 : protected llvm::IRBuilderDefaultInserter<PreserveNames> { 26 public: CGBuilderInserter()27 CGBuilderInserter() : CGF(nullptr) {} CGBuilderInserter(CodeGenFunction * CGF)28 explicit CGBuilderInserter(CodeGenFunction *CGF) : CGF(CGF) {} 29 30 protected: 31 /// \brief This forwards to CodeGenFunction::InsertHelper. 32 void InsertHelper(llvm::Instruction *I, const llvm::Twine &Name, 33 llvm::BasicBlock *BB, 34 llvm::BasicBlock::iterator InsertPt) const; 35 private: 36 void operator=(const CGBuilderInserter &) LLVM_DELETED_FUNCTION; 37 38 CodeGenFunction *CGF; 39 }; 40 41 // Don't preserve names on values in an optimized build. 42 #ifdef NDEBUG 43 #define PreserveNames false 44 #else 45 #define PreserveNames true 46 #endif 47 typedef CGBuilderInserter<PreserveNames> CGBuilderInserterTy; 48 typedef llvm::IRBuilder<PreserveNames, llvm::ConstantFolder, 49 CGBuilderInserterTy> CGBuilderTy; 50 #undef PreserveNames 51 52 } // end namespace CodeGen 53 } // end namespace clang 54 55 #endif 56