Reapply r112623. Included additional check for unused byval argument.
llvm-svn: 112659
diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
index eaa12d4..eeae8a3 100644
--- a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
@@ -1629,9 +1629,16 @@
bool updated = false;
// FIXME : Handle getNumOperands != 3
if (DVInsn->getNumOperands() == 3) {
- if (DVInsn->getOperand(0).isReg())
- updated =
- addRegisterAddress(VariableDie, DVLabel, DVInsn->getOperand(0));
+ if (DVInsn->getOperand(0).isReg()) {
+ const MachineOperand RegOp = DVInsn->getOperand(0);
+ const TargetRegisterInfo *TRI = Asm->TM.getRegisterInfo();
+ if (DVInsn->getOperand(1).isImm() &&
+ TRI->getFrameRegister(*Asm->MF) == RegOp.getReg()) {
+ addVariableAddress(DV, VariableDie, DVInsn->getOperand(1).getImm());
+ updated = true;
+ } else
+ updated = addRegisterAddress(VariableDie, DVLabel, RegOp);
+ }
else if (DVInsn->getOperand(0).isImm())
updated = addConstantValue(VariableDie, DVLabel, DVInsn->getOperand(0));
else if (DVInsn->getOperand(0).isFPImm())