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Fix null reference creation in ScheduleDAGInstrs constructor call.

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Both MachineLoopInfo and MachineDominatorTree may be null in ScheduleDAGMI
constructor call. It is undefined behavior to take references to these values.

This bug is reported by UBSan.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216118 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Alexey Samsonov
2014-08-20 19:36:05 +00:00
parent 4b1cddbaf0
commit ada5f2a2c7
6 changed files with 10 additions and 10 deletions
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2
lib/CodeGen/PostRASchedulerList.cpp
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@ -197,7 +197,7 @@ SchedulePostRATDList::SchedulePostRATDList(
AliasAnalysis *AA, const RegisterClassInfo &RCI,
TargetSubtargetInfo::AntiDepBreakMode AntiDepMode,
SmallVectorImpl<const TargetRegisterClass*> &CriticalPathRCs)
: ScheduleDAGInstrs(MF, MLI, MDT, /*IsPostRA=*/true), AA(AA), EndIndex(0) {
: ScheduleDAGInstrs(MF, &MLI, &MDT, /*IsPostRA=*/true), AA(AA), EndIndex(0) {
const TargetMachine &TM = MF.getTarget();
const InstrItineraryData *InstrItins =