diff options
Diffstat (limited to 'lib/CodeGen/LiveInterval.cpp')
| -rw-r--r-- | lib/CodeGen/LiveInterval.cpp | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/lib/CodeGen/LiveInterval.cpp b/lib/CodeGen/LiveInterval.cpp index dccd847d07..861e99b785 100644 --- a/lib/CodeGen/LiveInterval.cpp +++ b/lib/CodeGen/LiveInterval.cpp @@ -909,8 +909,16 @@ void ConnectedVNInfoEqClasses::Distribute(LiveInterval *LIV[], MachineOperand &MO = RI.getOperand(); MachineInstr *MI = MO.getParent(); ++RI; - // DBG_VALUE instructions should have been eliminated earlier. - LiveRangeQuery LRQ(LI, LIS.getInstructionIndex(MI)); + // DBG_VALUE instructions don't have slot indexes, so get the index of the + // instruction before them. + // Normally, DBG_VALUE instructions are removed before this function is + // called, but it is not a requirement. + SlotIndex Idx; + if (MI->isDebugValue()) + Idx = LIS.getSlotIndexes()->getIndexBefore(MI); + else + Idx = LIS.getInstructionIndex(MI); + LiveRangeQuery LRQ(LI, Idx); const VNInfo *VNI = MO.readsReg() ? LRQ.valueIn() : LRQ.valueDefined(); // In the case of an <undef> use that isn't tied to any def, VNI will be // NULL. If the use is tied to a def, VNI will be the defined value. |