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| author | Andrew Trick <atrick@apple.com> | 2011-10-07 06:33:09 +0000 |
|---|---|---|
| committer | Andrew Trick <atrick@apple.com> | 2011-10-07 06:33:09 +0000 |
| commit | 35c9e51219942b7a5d0f95fd0b2abc7f79f58ba0 (patch) | |
| tree | bedf79797262acb0845cb614ae10a9fe3da43307 /llvm/lib | |
| parent | 4ef158335ba92e217786aca5a7d8acb2b5e09766 (diff) | |
| download | bcm5719-llvm-35c9e51219942b7a5d0f95fd0b2abc7f79f58ba0.tar.gz bcm5719-llvm-35c9e51219942b7a5d0f95fd0b2abc7f79f58ba0.zip | |
PostRA scheduler fix. Clear stale loop dependencies.
Fixes <rdar://problem/10235725>
llvm-svn: 141357
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/CodeGen/ScheduleDAGInstrs.cpp | 1 | ||||
| -rw-r--r-- | llvm/lib/CodeGen/ScheduleDAGInstrs.h | 3 |
2 files changed, 3 insertions, 1 deletions
diff --git a/llvm/lib/CodeGen/ScheduleDAGInstrs.cpp b/llvm/lib/CodeGen/ScheduleDAGInstrs.cpp index c5647fbc22a..34b8ab0b47f 100644 --- a/llvm/lib/CodeGen/ScheduleDAGInstrs.cpp +++ b/llvm/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/llvm/lib/CodeGen/ScheduleDAGInstrs.h b/llvm/lib/CodeGen/ScheduleDAGInstrs.h index 6e672f4b727..666bdf548c7 100644 --- a/llvm/lib/CodeGen/ScheduleDAGInstrs.h +++ b/llvm/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(), |
