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| author | Dimitry Andric <dim@FreeBSD.org> | 2019-01-20 11:41:25 +0000 |
|---|---|---|
| committer | Dimitry Andric <dim@FreeBSD.org> | 2019-01-20 11:41:25 +0000 |
| commit | d9484dd61cc151c4f34c31e07f693fefa66316b5 (patch) | |
| tree | ab0560b3da293f1fafd3269c59692e929418f5c2 /contrib/llvm/lib/CodeGen/MachineCombiner.cpp | |
| parent | 79e0962d4c3cf1f0acf359a9d69cb3ac68c414c4 (diff) | |
| parent | d8e91e46262bc44006913e6796843909f1ac7bcd (diff) | |
Notes
Diffstat (limited to 'contrib/llvm/lib/CodeGen/MachineCombiner.cpp')
| -rw-r--r-- | contrib/llvm/lib/CodeGen/MachineCombiner.cpp | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/contrib/llvm/lib/CodeGen/MachineCombiner.cpp b/contrib/llvm/lib/CodeGen/MachineCombiner.cpp index 0c6efff7bb40..f51b482e20e3 100644 --- a/contrib/llvm/lib/CodeGen/MachineCombiner.cpp +++ b/contrib/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)) { |