diff options
Diffstat (limited to 'llvm/lib/CodeGen')
| -rw-r--r-- | llvm/lib/CodeGen/LiveInterval.cpp | 21 |
1 files changed, 13 insertions, 8 deletions
diff --git a/llvm/lib/CodeGen/LiveInterval.cpp b/llvm/lib/CodeGen/LiveInterval.cpp index ab780729347..171d18aa9c4 100644 --- a/llvm/lib/CodeGen/LiveInterval.cpp +++ b/llvm/lib/CodeGen/LiveInterval.cpp @@ -1483,15 +1483,20 @@ void ConnectedVNInfoEqClasses::Distribute(LiveInterval &LI, LiveInterval *LIV[], SubRanges.resize(NumComponents-1, nullptr); for (unsigned I = 0; I < NumValNos; ++I) { const VNInfo &VNI = *SR.valnos[I]; - const VNInfo *MainRangeVNI = LI.getVNInfoAt(VNI.def); - assert(MainRangeVNI != nullptr - && "SubRange def must have corresponding main range def"); - unsigned ComponentNum = getEqClass(MainRangeVNI); - VNIMapping.push_back(ComponentNum); - if (ComponentNum > 0 && SubRanges[ComponentNum-1] == nullptr) { - SubRanges[ComponentNum-1] - = LIV[ComponentNum-1]->createSubRange(Allocator, SR.LaneMask); + unsigned ComponentNum; + if (VNI.isUnused()) { + ComponentNum = 0; + } else { + const VNInfo *MainRangeVNI = LI.getVNInfoAt(VNI.def); + assert(MainRangeVNI != nullptr + && "SubRange def must have corresponding main range def"); + ComponentNum = getEqClass(MainRangeVNI); + if (ComponentNum > 0 && SubRanges[ComponentNum-1] == nullptr) { + SubRanges[ComponentNum-1] + = LIV[ComponentNum-1]->createSubRange(Allocator, SR.LaneMask); + } } + VNIMapping.push_back(ComponentNum); } DistributeRange(SR, SubRanges.data(), VNIMapping); } |
