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Use frame index, if available for byval argument while lowering dbg_declare. Otherwise let getRegForValue() find register for this argument.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@113843 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Devang Patel 2010-09-14 20:29:31 +00:00
parent 6f9eea87f7
commit 6fe75aaaeb
1 changed files with 20 additions and 16 deletions
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36
lib/CodeGen/SelectionDAG/FastISel.cpp
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@ -467,24 +467,28 @@ bool FastISel::SelectCall(const User *I) {
return true;
const Value *Address = DI->getAddress();
if (!Address)
if (!Address || isa<UndefValue>(Address) || isa<AllocaInst>(Address))
return true;
if (isa<UndefValue>(Address))
return true;
const AllocaInst *AI = dyn_cast<AllocaInst>(Address);
// Don't handle byval struct arguments or VLAs, for example.
if (!AI) {
// Building the map above is target independent. Generating DBG_VALUE
// inline is target dependent; do this now.
DenseMap<const Value *, unsigned>::iterator It =
FuncInfo.ValueMap.find(Address);
if (0 && It != FuncInfo.ValueMap.end()) {
BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL,
TII.get(TargetOpcode::DBG_VALUE))
.addReg(It->second, RegState::Debug).addImm(0).addMetadata(DI->getVariable());
} else
(void)TargetSelectInstruction(cast<Instruction>(I));
unsigned Reg = 0;
unsigned Offset = 0;
if (const Argument *Arg = dyn_cast<Argument>(Address)) {
if (Arg->hasByValAttr()) {
// Byval arguments' frame index is recorded during argument lowering.
// Use this info directly.
Offset = FuncInfo.getByValArgumentFrameIndex(Arg);
if (Offset)
Reg = TRI.getFrameRegister(*FuncInfo.MF);
}
}
if (!Reg)
Reg = getRegForValue(Address);
if (Reg)
BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL,
TII.get(TargetOpcode::DBG_VALUE))
.addReg(Reg, RegState::Debug).addImm(Offset)
.addMetadata(DI->getVariable());
return true;
}
case Intrinsic::dbg_value: {