6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-11-01 00:17:01 +00:00
Code Issues Projects Releases Wiki Activity

Debug Info: LiveDebugVarible can remove DBG_VALUEs, make sure we emit them back.

Browse Source 
RegisterCoalescer used to depend on LiveDebugVariable. LDV removes DBG_VALUEs
without emitting them at the end.

We fix this by removing LDV from RegisterCoalescer. Also add an assertion to
make sure we call emitDebugValues if DBG_VALUEs are removed at
runOnMachineFunction.

rdar://problem/13183203
Reviewed by Andy & Jakob


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@175023 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Manman Ren
2013-02-13 01:14:49 +00:00
parent b195398192
commit 4be3853fd0
4 changed files with 189 additions and 14 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
lib/CodeGen/RegisterCoalescer.cpp
View File

@@ -15,7 +15,6 @@
#define DEBUG_TYPE "regalloc"
#include "RegisterCoalescer.h"
#include "LiveDebugVariables.h"
#include "llvm/ADT/OwningPtr.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/SmallSet.h"
@@ -84,7 +83,6 @@ namespace {
const TargetRegisterInfo* TRI;
const TargetInstrInfo* TII;
LiveIntervals *LIS;
LiveDebugVariables *LDV;
const MachineLoopInfo* Loops;
AliasAnalysis *AA;
RegisterClassInfo RegClassInfo;
@@ -208,7 +206,6 @@ char &llvm::RegisterCoalescerID = RegisterCoalescer::ID;
INITIALIZE_PASS_BEGIN(RegisterCoalescer, "simple-register-coalescing",
"Simple Register Coalescing", false, false)
INITIALIZE_PASS_DEPENDENCY(LiveIntervals)
INITIALIZE_PASS_DEPENDENCY(LiveDebugVariables)
INITIALIZE_PASS_DEPENDENCY(SlotIndexes)
INITIALIZE_PASS_DEPENDENCY(MachineLoopInfo)
INITIALIZE_AG_DEPENDENCY(AliasAnalysis)
@@ -394,8 +391,6 @@ void RegisterCoalescer::getAnalysisUsage(AnalysisUsage &AU) const {
AU.addRequired<AliasAnalysis>();
AU.addRequired<LiveIntervals>();
AU.addPreserved<LiveIntervals>();
AU.addRequired<LiveDebugVariables>();
AU.addPreserved<LiveDebugVariables>();
AU.addPreserved<SlotIndexes>();
AU.addRequired<MachineLoopInfo>();
AU.addPreserved<MachineLoopInfo>();
@@ -883,9 +878,6 @@ void RegisterCoalescer::updateRegDefsUses(unsigned SrcReg,
bool DstIsPhys = TargetRegisterInfo::isPhysicalRegister(DstReg);
LiveInterval *DstInt = DstIsPhys ? 0 : &LIS->getInterval(DstReg);
// Update LiveDebugVariables.
LDV->renameRegister(SrcReg, DstReg, SubIdx);
SmallPtrSet<MachineInstr*, 8> Visited;
for (MachineRegisterInfo::reg_iterator I = MRI->reg_begin(SrcReg);
MachineInstr *UseMI = I.skipInstruction();) {
@@ -2136,7 +2128,6 @@ bool RegisterCoalescer::runOnMachineFunction(MachineFunction &fn) {
TRI = TM->getRegisterInfo();
TII = TM->getInstrInfo();
LIS = &getAnalysis<LiveIntervals>();
LDV = &getAnalysis<LiveDebugVariables>();
AA = &getAnalysis<AliasAnalysis>();
Loops = &getAnalysis<MachineLoopInfo>();
@@ -2182,7 +2173,6 @@ bool RegisterCoalescer::runOnMachineFunction(MachineFunction &fn) {
}
DEBUG(dump());
DEBUG(LDV->dump());
if (VerifyCoalescing)
MF->verify(this, "After register coalescing");
return true;