diff options
| author | Dimitry Andric <dim@FreeBSD.org> | 2019-01-19 10:01:25 +0000 |
|---|---|---|
| committer | Dimitry Andric <dim@FreeBSD.org> | 2019-01-19 10:01:25 +0000 |
| commit | d8e91e46262bc44006913e6796843909f1ac7bcd (patch) | |
| tree | 7d0c143d9b38190e0fa0180805389da22cd834c5 /lib/CodeGen/MachineCombiner.cpp | |
| parent | b7eb8e35e481a74962664b63dfb09483b200209a (diff) | |
Notes
Diffstat (limited to 'lib/CodeGen/MachineCombiner.cpp')
| -rw-r--r-- | lib/CodeGen/MachineCombiner.cpp | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/CodeGen/MachineCombiner.cpp b/lib/CodeGen/MachineCombiner.cpp index 0c6efff7bb40..f51b482e20e3 100644 --- a/lib/CodeGen/MachineCombiner.cpp +++ b/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)) { |