MachineFunctionPass.h revision 794fd75c67a2cdc128d67342c6d88a504d186896
1//===-- MachineFunctionPass.h - Pass for MachineFunctions --------*-C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file was developed by the LLVM research group and is distributed under 6// the University of Illinois Open Source 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 MachineFunctionPass(intptr_t ID) : FunctionPass(ID) {} 30 31 /// runOnMachineFunction - This method must be overloaded to perform the 32 /// desired machine code transformation or analysis. 33 /// 34 virtual bool runOnMachineFunction(MachineFunction &MF) = 0; 35 36 // FIXME: This pass should declare that the pass does not invalidate any LLVM 37 // passes. 38 virtual bool runOnFunction(Function &F) { 39 return runOnMachineFunction(MachineFunction::get(&F)); 40 } 41 42 virtual void virtfn(); // out of line virtual fn to give class a home. 43}; 44 45} // End llvm namespace 46 47#endif 48