freebsd-dev/contrib/llvm/lib/CodeGen/LiveDebugVariables.h
Dimitry Andric 2754fe609d Upgrade our copy of llvm/clang to r126079, from upstream's trunk.
This contains many improvements, primarily better C++ support, an
integrated assembler for x86 and support for -pg.
2011-02-20 19:33:47 +00:00

64 lines
2.0 KiB
C++

//===- LiveDebugVariables.h - Tracking debug info variables ----*- c++ -*--===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file provides the interface to the LiveDebugVariables analysis.
//
// The analysis removes DBG_VALUE instructions for virtual registers and tracks
// live user variables in a data structure that can be updated during register
// allocation.
//
// After register allocation new DBG_VALUE instructions are emitted to reflect
// the new locations of user variables.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CODEGEN_LIVEDEBUGVARIABLES_H
#define LLVM_CODEGEN_LIVEDEBUGVARIABLES_H
#include "llvm/CodeGen/MachineFunctionPass.h"
namespace llvm {
class VirtRegMap;
class LiveDebugVariables : public MachineFunctionPass {
void *pImpl;
public:
static char ID; // Pass identification, replacement for typeid
LiveDebugVariables();
~LiveDebugVariables();
/// renameRegister - Move any user variables in OldReg to NewReg:SubIdx.
/// @param OldReg Old virtual register that is going away.
/// @param NewReg New register holding the user variables.
/// @param SubIdx If NewReg is a virtual register, SubIdx may indicate a sub-
/// register.
void renameRegister(unsigned OldReg, unsigned NewReg, unsigned SubIdx);
/// emitDebugValues - Emit new DBG_VALUE instructions reflecting the changes
/// that happened during register allocation.
/// @param VRM Rename virtual registers according to map.
void emitDebugValues(VirtRegMap *VRM);
/// dump - Print data structures to dbgs().
void dump();
private:
virtual bool runOnMachineFunction(MachineFunction &);
virtual void releaseMemory();
virtual void getAnalysisUsage(AnalysisUsage &) const;
};
} // namespace llvm
#endif // LLVM_CODEGEN_LIVEDEBUGVARIABLES_H