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| author | Devang Patel <dpatel@apple.com> | 2011-05-26 21:49:28 +0000 |
|---|---|---|
| committer | Devang Patel <dpatel@apple.com> | 2011-05-26 21:49:28 +0000 |
| commit | 95ba669e09c30f9aa1a7d754199548b8e6a227ce (patch) | |
| tree | d28c717f58d127f80d383c1c21245793fb4c7df8 /lib/CodeGen/BranchFolding.cpp | |
| parent | 785badb83e09ebae485c40f3fd86576581dd516e (diff) | |
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132149 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/BranchFolding.cpp')
| -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)) |