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ScheduleDAGInstrs: Fix memory corruption

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We have to modify V2SU before inserting new elements into the
CurrentVRegDefs set because that may move V2SU in memory invalidating
the reference.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@270644 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Matthias Braun 2016-05-25 01:18:00 +00:00
parent b4811e71d7
commit 20c7e33686
1 changed files with 2 additions and 2 deletions
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4
lib/CodeGen/ScheduleDAGInstrs.cpp
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@ -511,10 +511,10 @@ void ScheduleDAGInstrs::addVRegDefDeps(SUnit *SU, unsigned OperIdx) {
// VReg2SUnit for the non-overlapping part.
LaneBitmask OverlapMask = V2SU.LaneMask & LaneMask;
LaneBitmask NonOverlapMask = V2SU.LaneMask & ~LaneMask;
if (NonOverlapMask != 0)
CurrentVRegDefs.insert(VReg2SUnit(Reg, NonOverlapMask, V2SU.SU));
V2SU.SU = SU;
V2SU.LaneMask = OverlapMask;
if (NonOverlapMask != 0)
CurrentVRegDefs.insert(VReg2SUnit(Reg, NonOverlapMask, DefSU));
}
// If there was no CurrentVRegDefs entry for some lanes yet, create one.
if (LaneMask != 0)