1 //===-- MachineFunctionPass.h - Pass for MachineFunctions --------*-C++ -*-===//
3 // The LLVM Compiler Infrastructure
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.
8 //===----------------------------------------------------------------------===//
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.
17 //===----------------------------------------------------------------------===//
19 #ifndef LLVM_CODEGEN_MACHINE_FUNCTION_PASS_H
20 #define LLVM_CODEGEN_MACHINE_FUNCTION_PASS_H
22 #include "llvm/Pass.h"
23 #include "llvm/CodeGen/MachineFunction.h"
27 struct MachineFunctionPass : public FunctionPass {
29 explicit MachineFunctionPass(intptr_t ID) : FunctionPass(ID) {}
32 /// runOnMachineFunction - This method must be overloaded to perform the
33 /// desired machine code transformation or analysis.
35 virtual bool runOnMachineFunction(MachineFunction &MF) = 0;
38 // FIXME: This pass should declare that the pass does not invalidate any LLVM
40 bool runOnFunction(Function &F) {
41 return runOnMachineFunction(MachineFunction::get(&F));
45 virtual void virtfn(); // out of line virtual fn to give class a home.
48 } // End llvm namespace