MachineFunctionPass.h revision ae73dc1448d25b02cabc7c64c86c64371453dda8
1//===-- MachineFunctionPass.h - Pass for MachineFunctions --------*-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// This file defines the MachineFunctionPass class. MachineFunctionPass's are 11// just FunctionPass's, except they operate on machine code as part of a code 12// generator. Because they operate on machine code, not the LLVM 13// representation, MachineFunctionPass's are not allowed to modify the LLVM 14// representation. Due to this limitation, the MachineFunctionPass class takes 15// care of declaring that no LLVM passes are invalidated. 16// 17//===----------------------------------------------------------------------===// 18 19#ifndef LLVM_CODEGEN_MACHINE_FUNCTION_PASS_H 20#define LLVM_CODEGEN_MACHINE_FUNCTION_PASS_H 21 22#include "llvm/Pass.h" 23#include "llvm/CodeGen/MachineFunction.h" 24 25namespace llvm { 26 27struct MachineFunctionPass : public FunctionPass { 28 29 explicit MachineFunctionPass(intptr_t ID) : FunctionPass(ID) {} 30 explicit MachineFunctionPass(void *ID) : FunctionPass(ID) {} 31 32protected: 33 /// runOnMachineFunction - This method must be overloaded to perform the 34 /// desired machine code transformation or analysis. 35 /// 36 virtual bool runOnMachineFunction(MachineFunction &MF) = 0; 37 38public: 39 // FIXME: This pass should declare that the pass does not invalidate any LLVM 40 // passes. 41 bool runOnFunction(Function &F) { 42 return runOnMachineFunction(MachineFunction::get(&F)); 43 } 44 45private: 46 virtual void virtfn(); // out of line virtual fn to give class a home. 47}; 48 49} // End llvm namespace 50 51#endif 52