diff options
Diffstat (limited to 'llvm/lib/CodeGen/MachineCombiner.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/MachineCombiner.cpp | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/MachineCombiner.cpp b/llvm/lib/CodeGen/MachineCombiner.cpp index 0c6efff7bb4..f51b482e20e 100644 --- a/llvm/lib/CodeGen/MachineCombiner.cpp +++ b/llvm/lib/CodeGen/MachineCombiner.cpp @@ -231,6 +231,8 @@ unsigned MachineCombiner::getLatency(MachineInstr *Root, MachineInstr *NewRoot, // Get the first instruction that uses MO MachineRegisterInfo::reg_iterator RI = MRI->reg_begin(MO.getReg()); RI++; + if (RI == MRI->reg_end()) + continue; MachineInstr *UseMO = RI->getParent(); unsigned LatencyOp = 0; if (UseMO && BlockTrace.isDepInTrace(*Root, *UseMO)) { |
