================
@@ -522,6 +526,28 @@ let Predicates = [BPFNoALU32] in {
}
def STD : STOREi64<BPF_DW, "u64", store>;
+class relaxed_store<PatFrag base>
+ : PatFrag<(ops node:$val, node:$ptr), (base node:$val, node:$ptr)> {
+ let IsAtomic = 1;
+ let IsAtomicOrderingReleaseOrStronger = 0;
+}
+
+class releasing_store<PatFrag base>
+ : PatFrag<(ops node:$val, node:$ptr), (base node:$val, node:$ptr)> {
+ let IsAtomic = 1;
+ let IsAtomicOrderingRelease = 1;
+}
----------------
yonghong-song wrote:
I found the following in arm64:
```
// A store operation that actually needs release semantics.
class releasing_store<PatFrag base>
: PatFrag<(ops node:$ptr, node:$val), (base node:$val, node:$ptr)> {
let IsAtomic = 1;
let IsAtomicOrderingReleaseOrStronger = 1;
}
// An atomic store operation that doesn't actually need to be atomic on AArch64.
class relaxed_store<PatFrag base>
: PatFrag<(ops node:$ptr, node:$val), (base node:$val, node:$ptr)> {
let IsAtomic = 1;
let IsAtomicOrderingReleaseOrStronger = 0;
}
```
What is the difference between IsAtomicOrderingReleaseOrStronger = 1 vs.
IsAtomicOrderingReleas = 1?
https://github.com/llvm/llvm-project/pull/108636
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