diff options
Diffstat (limited to 'include/llvm/CodeGen/MachineMemOperand.h')
| -rw-r--r-- | include/llvm/CodeGen/MachineMemOperand.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/include/llvm/CodeGen/MachineMemOperand.h b/include/llvm/CodeGen/MachineMemOperand.h index 1ac9080..ddb1271 100644 --- a/include/llvm/CodeGen/MachineMemOperand.h +++ b/include/llvm/CodeGen/MachineMemOperand.h @@ -151,6 +151,15 @@ public: bool isNonTemporal() const { return Flags & MONonTemporal; } bool isInvariant() const { return Flags & MOInvariant; } + /// isUnordered - Returns true if this memory operation doesn't have any + /// ordering constraints other than normal aliasing. Volatile and atomic + /// memory operations can't be reordered. + /// + /// Currently, we don't model the difference between volatile and atomic + /// operations. They should retain their ordering relative to all memory + /// operations. + bool isUnordered() const { return !isVolatile(); } + /// refineAlignment - Update this MachineMemOperand to reflect the alignment /// of MMO, if it has a greater alignment. This must only be used when the /// new alignment applies to all users of this MachineMemOperand. |