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| author | Dale Johannesen <dalej@apple.com> | 2010-04-06 21:59:56 +0000 |
|---|---|---|
| committer | Dale Johannesen <dalej@apple.com> | 2010-04-06 21:59:56 +0000 |
| commit | c4d7b14a92a9b34449eccdccce1263c4b68ad474 (patch) | |
| tree | 58b0f5ca98105afd505b36ff5fcb7b7044c815b2 /lib | |
| parent | 639336e0bda1373566d4cb29469f78fb4c9e95a6 (diff) | |
| download | external_llvm-c4d7b14a92a9b34449eccdccce1263c4b68ad474.zip external_llvm-c4d7b14a92a9b34449eccdccce1263c4b68ad474.tar.gz external_llvm-c4d7b14a92a9b34449eccdccce1263c4b68ad474.tar.bz2 | |
Allow for the possibility that a debug-value points
to a SDNode that didn't have code generated for it.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100566 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/CodeGen/SelectionDAG/InstrEmitter.cpp | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/lib/CodeGen/SelectionDAG/InstrEmitter.cpp b/lib/CodeGen/SelectionDAG/InstrEmitter.cpp index 28ba343..de8f1a0 100644 --- a/lib/CodeGen/SelectionDAG/InstrEmitter.cpp +++ b/lib/CodeGen/SelectionDAG/InstrEmitter.cpp @@ -517,8 +517,19 @@ MachineInstr *InstrEmitter::EmitDbgValue(SDDbgValue *SD, const TargetInstrDesc &II = TII->get(TargetOpcode::DBG_VALUE); MachineInstrBuilder MIB = BuildMI(*MF, DL, II); if (SD->getKind() == SDDbgValue::SDNODE) { - AddOperand(&*MIB, SDValue(SD->getSDNode(), SD->getResNo()), - (*MIB).getNumOperands(), &II, VRBaseMap, true /*IsDebug*/); + SDNode *Node = SD->getSDNode(); + SDValue Op = SDValue(Node, SD->getResNo()); + // It's possible we replaced this SDNode with other(s) and therefore + // didn't generate code for it. It's better to catch these cases where + // they happen and transfer the debug info, but trying to guarantee that + // in all cases would be very fragile; this is a safeguard for any + // that were missed. + DenseMap<SDValue, unsigned>::iterator I = VRBaseMap.find(Op); + if (I==VRBaseMap.end()) + MIB.addReg(0U); // undef + else + AddOperand(&*MIB, Op, (*MIB).getNumOperands(), &II, VRBaseMap, + true /*IsDebug*/); } else if (SD->getKind() == SDDbgValue::CONST) { Value *V = SD->getConst(); if (ConstantInt *CI = dyn_cast<ConstantInt>(V)) { |