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Use frameindex, if available, as a last resort to emit debug info for a parameter.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118020 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Devang Patel
2010-11-02 17:01:30 +00:00
parent 4c8a7156e3
commit a90b305af9
2 changed files with 48 additions and 2 deletions
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15
lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
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@ -3944,6 +3944,9 @@ SelectionDAGBuilder::EmitFuncArgumentDbgValue(const Value *V, MDNode *Variable,
return false;
MachineFunction &MF = DAG.getMachineFunction();
const TargetInstrInfo *TII = DAG.getTarget().getInstrInfo();
const TargetRegisterInfo *TRI = DAG.getTarget().getRegisterInfo();
// Ignore inlined function arguments here.
DIVariable DV(Variable);
if (DV.isInlinedFnArgument(MF.getFunction()))
@ -3957,7 +3960,6 @@ SelectionDAGBuilder::EmitFuncArgumentDbgValue(const Value *V, MDNode *Variable,
if (Arg->hasByValAttr()) {
// Byval arguments' frame index is recorded during argument lowering.
// Use this info directly.
const TargetRegisterInfo *TRI = DAG.getTarget().getRegisterInfo();
Reg = TRI->getFrameRegister(MF);
Offset = FuncInfo.getByValArgumentFrameIndex(Arg);
// If byval argument ofset is not recorded then ignore this.
@ -3976,13 +3978,22 @@ SelectionDAGBuilder::EmitFuncArgumentDbgValue(const Value *V, MDNode *Variable,
}
if (!Reg) {
// Check if ValueMap has reg number.
DenseMap<const Value *, unsigned>::iterator VMI = FuncInfo.ValueMap.find(V);
if (VMI == FuncInfo.ValueMap.end())
return false;
Reg = VMI->second;
}
const TargetInstrInfo *TII = DAG.getTarget().getInstrInfo();
if (!Reg && N.getNode())
// Check if frame index is available.
if (LoadSDNode *LNode = dyn_cast<LoadSDNode>(N.getNode()))
if (FrameIndexSDNode *FINode =
dyn_cast<FrameIndexSDNode>(LNode->getBasePtr().getNode())) {
Reg = TRI->getFrameRegister(MF);
Offset = FINode->getIndex();
}
MachineInstrBuilder MIB = BuildMI(MF, getCurDebugLoc(),
TII->get(TargetOpcode::DBG_VALUE))
.addReg(Reg, RegState::Debug).addImm(Offset).addMetadata(Variable);