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Reapply r112623. Included additional check for unused byval argument.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112659 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Devang Patel
2010-08-31 22:22:42 +00:00
parent 5023ef281c
commit 0b48eade42
5 changed files with 115 additions and 4 deletions
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20
lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
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@@ -3917,7 +3917,8 @@ bool
SelectionDAGBuilder::EmitFuncArgumentDbgValue(const Value *V, MDNode *Variable,
int64_t Offset,
const SDValue &N) {
if (!isa<Argument>(V))
const Argument *Arg = dyn_cast<Argument>(V);
if (!Arg)
return false;
MachineFunction &MF = DAG.getMachineFunction();
@@ -3931,6 +3932,14 @@ SelectionDAGBuilder::EmitFuncArgumentDbgValue(const Value *V, MDNode *Variable,
return false;
unsigned Reg = 0;
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 (N.getNode() && N.getOpcode() == ISD::CopyFromReg) {
Reg = cast<RegisterSDNode>(N.getOperand(1))->getReg();
if (Reg && TargetRegisterInfo::isVirtualRegister(Reg)) {
@@ -4075,6 +4084,9 @@ SelectionDAGBuilder::visitIntrinsicCall(const CallInst &I, unsigned Intrinsic) {
// debug info exists.
++SDNodeOrder;
SDValue &N = NodeMap[Address];
if (!N.getNode() && isa<Argument>(Address))
// Check unused arguments map.
N = UnusedArgNodeMap[Address];
SDDbgValue *SDV;
if (N.getNode()) {
if (isParameter && !AI) {
@@ -6131,6 +6143,12 @@ void SelectionDAGISel::LowerArguments(const BasicBlock *LLVMBB) {
i += NumParts;
}
// Note down frame index for byval arguments.
if (I->hasByValAttr() && !ArgValues.empty())
if (FrameIndexSDNode *FI =
dyn_cast<FrameIndexSDNode>(ArgValues[0].getNode()))
FuncInfo->setByValArgumentFrameIndex(I, FI->getIndex());
if (!I->use_empty()) {
SDValue Res;
if (!ArgValues.empty())