diff options
Diffstat (limited to 'llvm')
| -rw-r--r-- | llvm/include/llvm/CodeGen/MachineMemOperand.h | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/llvm/include/llvm/CodeGen/MachineMemOperand.h b/llvm/include/llvm/CodeGen/MachineMemOperand.h index 3a80c69232a..12fae2f5663 100644 --- a/llvm/include/llvm/CodeGen/MachineMemOperand.h +++ b/llvm/include/llvm/CodeGen/MachineMemOperand.h @@ -266,13 +266,13 @@ public: bool isAtomic() const { return getOrdering() != AtomicOrdering::NotAtomic; } /// 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(); } + /// constraints other than normal aliasing. Volatile and (ordered) atomic + /// memory operations can't be reordered. + bool isUnordered() const { + return (getOrdering() == AtomicOrdering::NotAtomic || + getOrdering() == AtomicOrdering::Unordered) && + !isVolatile(); + } /// 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 |
