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| author | Matthias Braun <matze@braunis.de> | 2014-12-24 02:11:48 +0000 |
|---|---|---|
| committer | Matthias Braun <matze@braunis.de> | 2014-12-24 02:11:48 +0000 |
| commit | 7030dda8d5c680534a8a1bbfb371db69025e40cb (patch) | |
| tree | fe38361c68f7503ede0dcd5adb30accba57c1661 /llvm/lib/CodeGen/RegisterCoalescer.cpp | |
| parent | 36768c684f2b7ba5b9dd9874c1ddb5ecd8fbaa29 (diff) | |
| download | bcm5719-llvm-7030dda8d5c680534a8a1bbfb371db69025e40cb.tar.gz bcm5719-llvm-7030dda8d5c680534a8a1bbfb371db69025e40cb.zip | |
RegisterCoalescer: With subrange liveness there may be no RedefVNI for unused lanes.
llvm-svn: 224805
Diffstat (limited to 'llvm/lib/CodeGen/RegisterCoalescer.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/RegisterCoalescer.cpp | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/llvm/lib/CodeGen/RegisterCoalescer.cpp b/llvm/lib/CodeGen/RegisterCoalescer.cpp index 8220bd46136..cc4d5590b6a 100644 --- a/llvm/lib/CodeGen/RegisterCoalescer.cpp +++ b/llvm/lib/CodeGen/RegisterCoalescer.cpp @@ -1817,9 +1817,12 @@ JoinVals::analyzeValue(unsigned ValNo, JoinVals &Other) { // not important. if (Redef) { V.RedefVNI = LR.Query(VNI->def).valueIn(); - assert(V.RedefVNI && "Instruction is reading nonexistent value"); - computeAssignment(V.RedefVNI->id, Other); - V.ValidLanes |= Vals[V.RedefVNI->id].ValidLanes; + assert(TrackSubRegLiveness || V.RedefVNI && + "Instruction is reading nonexistent value"); + if (V.RedefVNI != nullptr) { + computeAssignment(V.RedefVNI->id, Other); + V.ValidLanes |= Vals[V.RedefVNI->id].ValidLanes; + } } // An IMPLICIT_DEF writes undef values. |
