diff options
| -rw-r--r-- | include/llvm/Target/TargetInstrDesc.h | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/include/llvm/Target/TargetInstrDesc.h b/include/llvm/Target/TargetInstrDesc.h index 2f6e00c01a..6a0a396975 100644 --- a/include/llvm/Target/TargetInstrDesc.h +++ b/include/llvm/Target/TargetInstrDesc.h @@ -407,9 +407,10 @@ public: /// isAsCheapAsAMove - Returns true if this instruction has the same cost (or /// less) than a move instruction. This is useful during certain types of - /// rematerializations (e.g., during two-address conversion) where we would - /// like to remat the instruction, but not if it costs more than moving the - /// instruction into the appropriate register. + /// optimizations (e.g., remat during two-address conversion or machine licm) + /// where we would like to remat or hoist the instruction, but not if it costs + /// more than moving the instruction into the appropriate register. Note, we + /// are not marking copies from and to the same register class with this flag. bool isAsCheapAsAMove() const { return Flags & (1 << TID::CheapAsAMove); } |