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author | Andrew Trick <atrick@apple.com> | 2011-10-07 06:33:09 +0000 |
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committer | Andrew Trick <atrick@apple.com> | 2011-10-07 06:33:09 +0000 |
commit | e8deca83c157999062b4894163fd6b5023c5cf91 (patch) | |
tree | 591e252bc3bd943e61f515231ad42c6cfcd13b27 /lib | |
parent | 4563bbaba7fad4403acf0236cbd75805c68f2a90 (diff) | |
download | external_llvm-e8deca83c157999062b4894163fd6b5023c5cf91.zip external_llvm-e8deca83c157999062b4894163fd6b5023c5cf91.tar.gz external_llvm-e8deca83c157999062b4894163fd6b5023c5cf91.tar.bz2 |
PostRA scheduler fix. Clear stale loop dependencies.
Fixes <rdar://problem/10235725>
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141357 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib')
-rw-r--r-- | lib/CodeGen/ScheduleDAGInstrs.cpp | 1 | ||||
-rw-r--r-- | lib/CodeGen/ScheduleDAGInstrs.h | 3 |
2 files changed, 3 insertions, 1 deletions
diff --git a/lib/CodeGen/ScheduleDAGInstrs.cpp b/lib/CodeGen/ScheduleDAGInstrs.cpp index c5647fb..34b8ab0 100644 --- a/lib/CodeGen/ScheduleDAGInstrs.cpp +++ b/lib/CodeGen/ScheduleDAGInstrs.cpp @@ -134,6 +134,7 @@ static const Value *getUnderlyingObjectForInstr(const MachineInstr *MI, } void ScheduleDAGInstrs::StartBlock(MachineBasicBlock *BB) { + LoopRegs.Deps.clear(); if (MachineLoop *ML = MLI.getLoopFor(BB)) if (BB == ML->getLoopLatch()) { MachineBasicBlock *Header = ML->getHeader(); diff --git a/lib/CodeGen/ScheduleDAGInstrs.h b/lib/CodeGen/ScheduleDAGInstrs.h index 6e672f4..666bdf5 100644 --- a/lib/CodeGen/ScheduleDAGInstrs.h +++ b/lib/CodeGen/ScheduleDAGInstrs.h @@ -48,7 +48,8 @@ namespace llvm { /// VisitLoop - Clear out any previous state and analyze the given loop. /// void VisitLoop(const MachineLoop *Loop) { - Deps.clear(); + assert(Deps.empty() && "stale loop dependencies"); + MachineBasicBlock *Header = Loop->getHeader(); SmallSet<unsigned, 8> LoopLiveIns; for (MachineBasicBlock::livein_iterator LI = Header->livein_begin(), |