[llvm] [WebAssembly] MC support for acquire-release atomics (PR #183656)

[Heejin Ahn via llvm-commits]

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@@ -81,6 +81,10 @@ def FeatureSignExt :
       SubtargetFeature<"sign-ext", "HasSignExt", "true",
                        "Enable sign extension operators">;
 
+def FeatureSharedEverything :
+      SubtargetFeature<"shared-everything", "HasSharedEverything", "true",
+                       "Enable shared-everything-threads proposal">;
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aheejin wrote:

Come to think of it we have `atomics` flag even though it was not actually split out from the threads proposal... 

https://github.com/llvm/llvm-project/pull/183656