diff options
Diffstat (limited to 'lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp')
-rw-r--r-- | lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp index fcde6b5b93..1d0ed3af45 100644 --- a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp +++ b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp @@ -408,9 +408,13 @@ bool SelectionDAGISel::runOnMachineFunction(MachineFunction &mf) { EntryMBB->insert(EntryMBB->begin(), MI); else { MachineInstr *Def = RegInfo->getVRegDef(Reg); - MachineBasicBlock::iterator InsertPos = Def; - // FIXME: VR def may not be in entry block. - Def->getParent()->insert(llvm::next(InsertPos), MI); + if (Def) { + MachineBasicBlock::iterator InsertPos = Def; + // FIXME: VR def may not be in entry block. + Def->getParent()->insert(llvm::next(InsertPos), MI); + } else + DEBUG(dbgs() << "Dropping debug info for dead vreg" + << TargetRegisterInfo::virtReg2Index(Reg) << "\n"); } // If Reg is live-in then update debug info to track its copy in a vreg. |