diff options
Diffstat (limited to 'llvm/lib/CodeGen/MachineScheduler.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/MachineScheduler.cpp | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/llvm/lib/CodeGen/MachineScheduler.cpp b/llvm/lib/CodeGen/MachineScheduler.cpp index 66d3a28..88f0630 100644 --- a/llvm/lib/CodeGen/MachineScheduler.cpp +++ b/llvm/lib/CodeGen/MachineScheduler.cpp @@ -486,13 +486,17 @@ getSchedRegions(MachineBasicBlock *MBB, MachineInstr &MI = *std::prev(I); if (isSchedBoundary(&MI, &*MBB, MF, TII)) break; - if (!MI.isDebugInstr()) + if (!MI.isDebugInstr()) { // MBB::size() uses instr_iterator to count. Here we need a bundle to // count as a single instruction. ++NumRegionInstrs; + } } - Regions.push_back(SchedRegion(I, RegionEnd, NumRegionInstrs)); + // It's possible we found a scheduling region that only has debug + // instructions. Don't bother scheduling these. + if (NumRegionInstrs != 0) + Regions.push_back(SchedRegion(I, RegionEnd, NumRegionInstrs)); } if (RegionsTopDown) |