diff options
Diffstat (limited to 'llvm/lib/CodeGen/LiveDebugValues/InstrRefBasedImpl.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/LiveDebugValues/InstrRefBasedImpl.cpp | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/LiveDebugValues/InstrRefBasedImpl.cpp b/llvm/lib/CodeGen/LiveDebugValues/InstrRefBasedImpl.cpp index 23fde21..91d5ac2 100644 --- a/llvm/lib/CodeGen/LiveDebugValues/InstrRefBasedImpl.cpp +++ b/llvm/lib/CodeGen/LiveDebugValues/InstrRefBasedImpl.cpp @@ -2533,6 +2533,12 @@ bool InstrRefBasedLDV::vlocJoin( if (*V.second == FirstVal) continue; // No disagreement. + // If both values are not equal but have equal non-empty IDs then they refer + // to the same value from different sources (e.g. one is VPHI and the other + // is Def), which does not cause disagreement. + if (V.second->ID != ValueIDNum::EmptyValue && V.second->ID == FirstVal.ID) + continue; + // Eliminate if a backedge feeds a VPHI back into itself. if (V.second->Kind == DbgValue::VPHI && V.second->BlockNo == MBB.getNumber() && |