LiveDebugVariables.h revision 30e2128a731e5a0bcac45a6a79a03bdedce68a0a
1378553cb079aba2b8dee5d52b5166316d4132d5aJohn Mosby//===- LiveDebugVariables.h - Tracking debug info variables ----*- c++ -*--===// 2378553cb079aba2b8dee5d52b5166316d4132d5aJohn Mosby// 3378553cb079aba2b8dee5d52b5166316d4132d5aJohn Mosby// The LLVM Compiler Infrastructure 4378553cb079aba2b8dee5d52b5166316d4132d5aJohn Mosby// 5378553cb079aba2b8dee5d52b5166316d4132d5aJohn Mosby// This file is distributed under the University of Illinois Open Source 6378553cb079aba2b8dee5d52b5166316d4132d5aJohn Mosby// License. See LICENSE.TXT for details. 7378553cb079aba2b8dee5d52b5166316d4132d5aJohn Mosby// 8378553cb079aba2b8dee5d52b5166316d4132d5aJohn Mosby//===----------------------------------------------------------------------===// 9378553cb079aba2b8dee5d52b5166316d4132d5aJohn Mosby// 10378553cb079aba2b8dee5d52b5166316d4132d5aJohn Mosby// This file provides the interface to the LiveDebugVariables analysis. 11378553cb079aba2b8dee5d52b5166316d4132d5aJohn Mosby// 12378553cb079aba2b8dee5d52b5166316d4132d5aJohn Mosby// The analysis removes DBG_VALUE instructions for virtual registers and tracks 13378553cb079aba2b8dee5d52b5166316d4132d5aJohn Mosby// live user variables in a data structure that can be updated during register 14378553cb079aba2b8dee5d52b5166316d4132d5aJohn Mosby// allocation. 15378553cb079aba2b8dee5d52b5166316d4132d5aJohn Mosby// 16378553cb079aba2b8dee5d52b5166316d4132d5aJohn Mosby// After register allocation new DBG_VALUE instructions are emitted to reflect 17378553cb079aba2b8dee5d52b5166316d4132d5aJohn Mosby// the new locations of user variables. 18378553cb079aba2b8dee5d52b5166316d4132d5aJohn Mosby// 19378553cb079aba2b8dee5d52b5166316d4132d5aJohn Mosby//===----------------------------------------------------------------------===// 20378553cb079aba2b8dee5d52b5166316d4132d5aJohn Mosby 21378553cb079aba2b8dee5d52b5166316d4132d5aJohn Mosby#ifndef LLVM_CODEGEN_LIVEDEBUGVARIABLES_H 22378553cb079aba2b8dee5d52b5166316d4132d5aJohn Mosby#define LLVM_CODEGEN_LIVEDEBUGVARIABLES_H 23378553cb079aba2b8dee5d52b5166316d4132d5aJohn Mosby 24378553cb079aba2b8dee5d52b5166316d4132d5aJohn Mosby#include "llvm/CodeGen/MachineFunctionPass.h" 25378553cb079aba2b8dee5d52b5166316d4132d5aJohn Mosby 26378553cb079aba2b8dee5d52b5166316d4132d5aJohn Mosbynamespace llvm { 27378553cb079aba2b8dee5d52b5166316d4132d5aJohn Mosby 28378553cb079aba2b8dee5d52b5166316d4132d5aJohn Mosbyclass LiveDebugVariables : public MachineFunctionPass { 29378553cb079aba2b8dee5d52b5166316d4132d5aJohn Mosby void *pImpl; 30378553cb079aba2b8dee5d52b5166316d4132d5aJohn Mosbypublic: 31378553cb079aba2b8dee5d52b5166316d4132d5aJohn Mosby static char ID; // Pass identification, replacement for typeid 32378553cb079aba2b8dee5d52b5166316d4132d5aJohn Mosby 33378553cb079aba2b8dee5d52b5166316d4132d5aJohn Mosby LiveDebugVariables(); 34378553cb079aba2b8dee5d52b5166316d4132d5aJohn Mosby ~LiveDebugVariables(); 35378553cb079aba2b8dee5d52b5166316d4132d5aJohn Mosby 36378553cb079aba2b8dee5d52b5166316d4132d5aJohn Mosby /// renameRegister - Move any user variables in OldReg to NewReg:SubIdx. 37752c1df73949438ef6fa86a86363ee7091aa2532John Mosby /// @param OldReg Old virtual register that is going away. 38378553cb079aba2b8dee5d52b5166316d4132d5aJohn Mosby /// @param NewReg New register holding the user variables. 39378553cb079aba2b8dee5d52b5166316d4132d5aJohn Mosby /// @param SubIdx If NewReg is a virtual register, SubIdx may indicate a sub- 40378553cb079aba2b8dee5d52b5166316d4132d5aJohn Mosby /// register. 41378553cb079aba2b8dee5d52b5166316d4132d5aJohn Mosby void renameRegister(unsigned OldReg, unsigned NewReg, unsigned SubIdx); 42378553cb079aba2b8dee5d52b5166316d4132d5aJohn Mosby 43378553cb079aba2b8dee5d52b5166316d4132d5aJohn Mosby /// emitDebugValues - Emit new DBG_VALUE instructions reflecting the changes 44378553cb079aba2b8dee5d52b5166316d4132d5aJohn Mosby /// that happened during register allocation. 45378553cb079aba2b8dee5d52b5166316d4132d5aJohn Mosby void emitDebugValues(); 46378553cb079aba2b8dee5d52b5166316d4132d5aJohn Mosby 47378553cb079aba2b8dee5d52b5166316d4132d5aJohn Mosby /// dump - Print data structures to dbgs(). 48378553cb079aba2b8dee5d52b5166316d4132d5aJohn Mosby void dump(); 49378553cb079aba2b8dee5d52b5166316d4132d5aJohn Mosby 50378553cb079aba2b8dee5d52b5166316d4132d5aJohn Mosbyprivate: 51378553cb079aba2b8dee5d52b5166316d4132d5aJohn Mosby 52378553cb079aba2b8dee5d52b5166316d4132d5aJohn Mosby virtual bool runOnMachineFunction(MachineFunction &); 53378553cb079aba2b8dee5d52b5166316d4132d5aJohn Mosby virtual void releaseMemory(); 54378553cb079aba2b8dee5d52b5166316d4132d5aJohn Mosby virtual void getAnalysisUsage(AnalysisUsage &) const; 55378553cb079aba2b8dee5d52b5166316d4132d5aJohn Mosby 56378553cb079aba2b8dee5d52b5166316d4132d5aJohn Mosby}; 57378553cb079aba2b8dee5d52b5166316d4132d5aJohn Mosby 58378553cb079aba2b8dee5d52b5166316d4132d5aJohn Mosby} // namespace llvm 59378553cb079aba2b8dee5d52b5166316d4132d5aJohn Mosby 60378553cb079aba2b8dee5d52b5166316d4132d5aJohn Mosby#endif // LLVM_CODEGEN_LIVEDEBUGVARIABLES_H 61378553cb079aba2b8dee5d52b5166316d4132d5aJohn Mosby