diff options
| -rw-r--r-- | lib/CodeGen/BranchFolding.cpp | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/lib/CodeGen/BranchFolding.cpp b/lib/CodeGen/BranchFolding.cpp index 2bcd59f1bd..719cd264f6 100644 --- a/lib/CodeGen/BranchFolding.cpp +++ b/lib/CodeGen/BranchFolding.cpp @@ -1056,10 +1056,13 @@ ReoptimizeBlock: !MBB->hasAddressTaken() && !MBB->isLandingPad()) { DEBUG(dbgs() << "\nMerging into block: " << PrevBB << "From MBB: " << *MBB); + // Remove redundant DBG_VALUEs first. if (PrevBB.begin() != PrevBB.end()) { MachineBasicBlock::iterator PrevBBIter = PrevBB.end(); --PrevBBIter; MachineBasicBlock::iterator MBBIter = MBB->begin(); + // Check if DBG_VALUE at the end of PrevBB is identical to the + // DBG_VALUE at the beginning of MBB. while (PrevBBIter != PrevBB.begin() && MBBIter != MBB->end() && PrevBBIter->isDebugValue() && MBBIter->isDebugValue()) { if (!MBBIter->isIdenticalTo(PrevBBIter)) |