MachineFunctionPass.h revision d1ad72f54f4abf62a5f0b2c297edf5e4b1ab1024
12a4a095e5788be7967c0ac311efc269bc87e80b3Chris Lattner//===-- MachineFunctionPass.h - Pass for MachineFunctions --------*-C++ -*-===// 2ea61c358720aa6c7a159d51658b34276316aa841Misha Brukman// 36fbcc26f1460eaee4e0eb8b426fc1ff0c7af11beJohn Criswell// The LLVM Compiler Infrastructure 46fbcc26f1460eaee4e0eb8b426fc1ff0c7af11beJohn Criswell// 57ed47a13356daed2a34cd2209a31f92552e3bdd8Chris Lattner// This file is distributed under the University of Illinois Open Source 67ed47a13356daed2a34cd2209a31f92552e3bdd8Chris Lattner// License. See LICENSE.TXT for details. 7ea61c358720aa6c7a159d51658b34276316aa841Misha Brukman// 86fbcc26f1460eaee4e0eb8b426fc1ff0c7af11beJohn Criswell//===----------------------------------------------------------------------===// 92a4a095e5788be7967c0ac311efc269bc87e80b3Chris Lattner// 102a4a095e5788be7967c0ac311efc269bc87e80b3Chris Lattner// This file defines the MachineFunctionPass class. MachineFunctionPass's are 112a4a095e5788be7967c0ac311efc269bc87e80b3Chris Lattner// just FunctionPass's, except they operate on machine code as part of a code 122a4a095e5788be7967c0ac311efc269bc87e80b3Chris Lattner// generator. Because they operate on machine code, not the LLVM 132a4a095e5788be7967c0ac311efc269bc87e80b3Chris Lattner// representation, MachineFunctionPass's are not allowed to modify the LLVM 142a4a095e5788be7967c0ac311efc269bc87e80b3Chris Lattner// representation. Due to this limitation, the MachineFunctionPass class takes 152a4a095e5788be7967c0ac311efc269bc87e80b3Chris Lattner// care of declaring that no LLVM passes are invalidated. 162a4a095e5788be7967c0ac311efc269bc87e80b3Chris Lattner// 172a4a095e5788be7967c0ac311efc269bc87e80b3Chris Lattner//===----------------------------------------------------------------------===// 182a4a095e5788be7967c0ac311efc269bc87e80b3Chris Lattner 192a4a095e5788be7967c0ac311efc269bc87e80b3Chris Lattner#ifndef LLVM_CODEGEN_MACHINE_FUNCTION_PASS_H 202a4a095e5788be7967c0ac311efc269bc87e80b3Chris Lattner#define LLVM_CODEGEN_MACHINE_FUNCTION_PASS_H 212a4a095e5788be7967c0ac311efc269bc87e80b3Chris Lattner 222a4a095e5788be7967c0ac311efc269bc87e80b3Chris Lattner#include "llvm/Pass.h" 232a4a095e5788be7967c0ac311efc269bc87e80b3Chris Lattner#include "llvm/CodeGen/MachineFunction.h" 242a4a095e5788be7967c0ac311efc269bc87e80b3Chris Lattner 25d0fde30ce850b78371fd1386338350591f9ff494Brian Gaekenamespace llvm { 26d0fde30ce850b78371fd1386338350591f9ff494Brian Gaeke 27ad2afc2a421a0e41603d5eee412d4d8c77e9bc1cDan Gohman/// MachineFunctionPass - This class adapts the FunctionPass interface to 28ad2afc2a421a0e41603d5eee412d4d8c77e9bc1cDan Gohman/// allow convenient creation of passes that operate on the MachineFunction 29ad2afc2a421a0e41603d5eee412d4d8c77e9bc1cDan Gohman/// representation. Instead of overriding runOnFunction, subclasses 30ad2afc2a421a0e41603d5eee412d4d8c77e9bc1cDan Gohman/// override runOnMachineFunction. 31ad2afc2a421a0e41603d5eee412d4d8c77e9bc1cDan Gohmanclass MachineFunctionPass : public FunctionPass { 32ad2afc2a421a0e41603d5eee412d4d8c77e9bc1cDan Gohmanprotected: 33a6900c7ad9752a27e2e3b1bd78b2af3b1381176dDan Gohman explicit MachineFunctionPass(intptr_t ID) : FunctionPass(ID) {} 34ae73dc1448d25b02cabc7c64c86c64371453dda8Dan Gohman explicit MachineFunctionPass(void *ID) : FunctionPass(ID) {} 35794fd75c67a2cdc128d67342c6d88a504d186896Devang Patel 362a4a095e5788be7967c0ac311efc269bc87e80b3Chris Lattner /// runOnMachineFunction - This method must be overloaded to perform the 372a4a095e5788be7967c0ac311efc269bc87e80b3Chris Lattner /// desired machine code transformation or analysis. 382a4a095e5788be7967c0ac311efc269bc87e80b3Chris Lattner /// 392a4a095e5788be7967c0ac311efc269bc87e80b3Chris Lattner virtual bool runOnMachineFunction(MachineFunction &MF) = 0; 402a4a095e5788be7967c0ac311efc269bc87e80b3Chris Lattner 41ad2afc2a421a0e41603d5eee412d4d8c77e9bc1cDan Gohman /// getAnalysisUsage - Subclasses that override getAnalysisUsage 42ad2afc2a421a0e41603d5eee412d4d8c77e9bc1cDan Gohman /// must call this. 43d1ad72f54f4abf62a5f0b2c297edf5e4b1ab1024Dan Gohman /// 44d1ad72f54f4abf62a5f0b2c297edf5e4b1ab1024Dan Gohman /// For MachineFunctionPasses, calling AU.preservesCFG() indicates that 45d1ad72f54f4abf62a5f0b2c297edf5e4b1ab1024Dan Gohman /// the pass does not modify the MachineBasicBlock CFG. 46d1ad72f54f4abf62a5f0b2c297edf5e4b1ab1024Dan Gohman /// 47ad2afc2a421a0e41603d5eee412d4d8c77e9bc1cDan Gohman virtual void getAnalysisUsage(AnalysisUsage &AU) const; 48ad2afc2a421a0e41603d5eee412d4d8c77e9bc1cDan Gohman 49ad2afc2a421a0e41603d5eee412d4d8c77e9bc1cDan Gohmanprivate: 50266c7bbbbcc4b326dea82e577de1a415d6acc23eChris Lattner bool runOnFunction(Function &F); 512a4a095e5788be7967c0ac311efc269bc87e80b3Chris Lattner}; 522a4a095e5788be7967c0ac311efc269bc87e80b3Chris Lattner 53d0fde30ce850b78371fd1386338350591f9ff494Brian Gaeke} // End llvm namespace 54d0fde30ce850b78371fd1386338350591f9ff494Brian Gaeke 552a4a095e5788be7967c0ac311efc269bc87e80b3Chris Lattner#endif 56