From 8559932d36eff4a83c154ea52964c462112a56e7 Mon Sep 17 00:00:00 2001 From: Devang Patel Date: Tue, 31 Aug 2010 18:50:09 +0000 Subject: Remember byval argument's frame index during argument lowering and use this info to emit debug info. Fixes Radar 8367011. llvm-svn: 112623 --- llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp | 17 ++++++++++++++++- 1 file changed, 16 insertions(+), 1 deletion(-) (limited to 'llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp') diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp index b70bfeaba5a..0a330213a16 100644 --- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp @@ -3917,7 +3917,8 @@ bool SelectionDAGBuilder::EmitFuncArgumentDbgValue(const Value *V, MDNode *Variable, int64_t Offset, const SDValue &N) { - if (!isa(V)) + const Argument *Arg = dyn_cast(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(N.getOperand(1))->getReg(); if (Reg && TargetRegisterInfo::isVirtualRegister(Reg)) { @@ -6131,6 +6140,12 @@ 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(ArgValues[0].getNode())) + FuncInfo->setByValArgumentFrameIndex(I, FI->getIndex()); + if (!I->use_empty()) { SDValue Res; if (!ArgValues.empty()) -- cgit v1.2.3