diff options
| -rw-r--r-- | llvm/include/llvm/CodeGen/MachineInstr.h | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/llvm/include/llvm/CodeGen/MachineInstr.h b/llvm/include/llvm/CodeGen/MachineInstr.h index c645c20cc17..b99dbf0fc97 100644 --- a/llvm/include/llvm/CodeGen/MachineInstr.h +++ b/llvm/include/llvm/CodeGen/MachineInstr.h @@ -722,8 +722,10 @@ public: }; /// Return true if this instruction is identical to \p Other. - /// Identical meaning same opcode and all operands reported as - /// isIdenticalOp() (equal except for liveness flags). + /// Two instructions are identical if they have the same opcode and all their + /// operands are identical (with respect to MachineOperand::isIdenticalTo()). + /// Note that this means liveness related flags (dead, undef, kill) do not + /// affect the notion of identical. bool isIdenticalTo(const MachineInstr &Other, MICheckType Check = CheckDefs) const; |
