[llvm-commits] [llvm] r102585 - in /llvm/trunk/lib/CodeGen/SelectionDAG: SelectionDAGBuilder.cpp SelectionDAGBuilder.h
Evan Cheng
evan.cheng at apple.com
Wed Apr 28 18:40:30 PDT 2010
Author: evancheng
Date: Wed Apr 28 20:40:30 2010
New Revision: 102585
URL: http://llvm.org/viewvc/llvm-project?rev=102585&view=rev
Log:
Do not generate duplicate dbg_value instructions for function arguments.
Modified:
llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.h
Modified: llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp?rev=102585&r1=102584&r2=102585&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp (original)
+++ llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp Wed Apr 28 20:40:30 2010
@@ -3684,17 +3684,17 @@
/// EmitFuncArgumentDbgValue - If the DbgValueInst is a dbg_value of a function
/// argument, create the corresponding DBG_VALUE machine instruction for it now.
/// At the end of instruction selection, they will be inserted to the entry BB.
-void
+bool
SelectionDAGBuilder::EmitFuncArgumentDbgValue(const DbgValueInst &DI,
const Value *V, MDNode *Variable,
uint64_t Offset, SDValue &N) {
if (!isa<Argument>(V))
- return;
+ return false;
MachineFunction &MF = DAG.getMachineFunction();
MachineBasicBlock *MBB = FuncInfo.MBBMap[DI.getParent()];
if (MBB != &MF.front())
- return;
+ return false;
unsigned Reg = 0;
if (N.getOpcode() == ISD::CopyFromReg) {
@@ -3710,13 +3710,14 @@
if (!Reg)
Reg = FuncInfo.ValueMap[V];
if (!Reg)
- return;
+ return false;
const TargetInstrInfo *TII = DAG.getTarget().getInstrInfo();
MachineInstrBuilder MIB = BuildMI(MF, getCurDebugLoc(),
TII->get(TargetOpcode::DBG_VALUE))
.addReg(Reg).addImm(Offset).addMetadata(Variable);
FuncInfo.ArgDbgValues.push_back(&*MIB);
+ return true;
}
/// visitIntrinsicCall - Lower the call to the specified intrinsic function. If
@@ -3895,10 +3896,11 @@
} else {
SDValue &N = NodeMap[V];
if (N.getNode()) {
- EmitFuncArgumentDbgValue(DI, V, Variable, Offset, N);
- SDV = DAG.getDbgValue(Variable, N.getNode(),
- N.getResNo(), Offset, dl, SDNodeOrder);
- DAG.AddDbgValue(SDV, N.getNode(), false);
+ if (!EmitFuncArgumentDbgValue(DI, V, Variable, Offset, N)) {
+ SDV = DAG.getDbgValue(Variable, N.getNode(),
+ N.getResNo(), Offset, dl, SDNodeOrder);
+ DAG.AddDbgValue(SDV, N.getNode(), false);
+ }
} else {
// We may expand this to cover more cases. One case where we have no
// data available is an unreferenced parameter; we need this fallback.
Modified: llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.h?rev=102585&r1=102584&r2=102585&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.h (original)
+++ llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.h Wed Apr 28 20:40:30 2010
@@ -502,7 +502,7 @@
/// function argument, create the corresponding DBG_VALUE machine instruction
/// for it now. At the end of instruction selection, they will be inserted to
/// the entry BB.
- void EmitFuncArgumentDbgValue(const DbgValueInst &DI,
+ bool EmitFuncArgumentDbgValue(const DbgValueInst &DI,
const Value *V, MDNode *Variable,
uint64_t Offset, SDValue &N);
};
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