diff options
| -rw-r--r-- | lib/CodeGen/StrongPHIElimination.cpp | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/lib/CodeGen/StrongPHIElimination.cpp b/lib/CodeGen/StrongPHIElimination.cpp index 5713e6a..4749d8e 100644 --- a/lib/CodeGen/StrongPHIElimination.cpp +++ b/lib/CodeGen/StrongPHIElimination.cpp @@ -283,7 +283,9 @@ bool StrongPHIElimination::runOnMachineFunction(MachineFunction& MF) { LiveInterval& DestLI = LI->getInterval(DestReg); LiveInterval& NewLI = LI->getInterval(NewReg); - assert(DestLI.ranges.size() == 1); + assert(DestLI.ranges.size() == 1 + && "PHI destination copy's live interval should be a single live " + "range from the beginning of the BB to the copy instruction."); LiveRange* DestLR = DestLI.begin(); VNInfo* NewVNI = NewLI.getVNInfoAt(DestLR->start); if (!NewVNI) { |