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| -rw-r--r-- | llvm/docs/Atomics.rst | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/llvm/docs/Atomics.rst b/llvm/docs/Atomics.rst index d035bac8d8d..6c8303b2830 100644 --- a/llvm/docs/Atomics.rst +++ b/llvm/docs/Atomics.rst @@ -444,6 +444,7 @@ on ARM, etc.). It is often easiest for backends to use AtomicExpandPass to lower some of the atomic constructs. Here are some lowerings it can do: + * cmpxchg -> loop with load-linked/store-conditional by overriding ``hasLoadLinkedStoreConditional()``, ``emitLoadLinked()``, ``emitStoreConditional()`` @@ -454,4 +455,5 @@ atomic constructs. Here are some lowerings it can do: and ``emitTrailingFence()`` * atomic rmw -> loop with cmpxchg or load-linked/store-conditional by overriding ``expandAtomicRMWInIR()`` + For an example of all of these, look at the ARM backend. |
