6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-07-28 19:25:00 +00:00
Code Issues Projects Releases Wiki Activity

Update LiveDebugVariables after live range splitting.

Browse Source 
After a virtual register is split, update any debug user variables that resided
in the old register. This ensures that the LiveDebugVariables are still correct
after register allocation.

This may create DBG_VALUE instructions that place a user variable in a register
in parts of the function and in a stack slot in other parts. DwarfDebug
currently doesn't support that.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130998 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen
2011-05-06 18:00:02 +00:00
parent e77150bbcb
commit f42b66169d
4 changed files with 165 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
lib/CodeGen/LiveDebugVariables.h
View File

@@ -21,10 +21,12 @@
#ifndef LLVM_CODEGEN_LIVEDEBUGVARIABLES_H
#define LLVM_CODEGEN_LIVEDEBUGVARIABLES_H
#include "llvm/ADT/ArrayRef.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
namespace llvm {
class LiveInterval;
class VirtRegMap;
class LiveDebugVariables : public MachineFunctionPass {
@@ -42,6 +44,11 @@ public:
/// register.
void renameRegister(unsigned OldReg, unsigned NewReg, unsigned SubIdx);
/// splitRegister - Move any user variables in OldReg to the live ranges in
/// NewRegs where they are live. Mark the values as unavailable where no new
/// register is live.
void splitRegister(unsigned OldReg, ArrayRef<LiveInterval*> NewRegs);
/// emitDebugValues - Emit new DBG_VALUE instructions reflecting the changes
/// that happened during register allocation.
/// @param VRM Rename virtual registers according to map.