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misched: fix RegionBegin when DebugValues get shuffled to the top.

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assert (RemainingInstrs == 0 && "Instruction count mismatch!")

rdar://12776937.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169069 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Andrew Trick
2012-12-01 01:22:38 +00:00
parent 8c3dccde92
commit 67bdd42d1e
2 changed files with 87 additions and 0 deletions
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2
lib/CodeGen/MachineScheduler.cpp
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@@ -674,6 +674,8 @@ void ScheduleDAGMI::placeDebugValues() {
std::pair<MachineInstr *, MachineInstr *> P = *prior(DI);
MachineInstr *DbgValue = P.first;
MachineBasicBlock::iterator OrigPrevMI = P.second;
if (&*RegionBegin == DbgValue)
++RegionBegin;
BB->splice(++OrigPrevMI, BB, DbgValue);
if (OrigPrevMI == llvm::prior(RegionEnd))
RegionEnd = DbgValue;