[llvm] [RFC] Memory Model Relaxation Annotations (PR #78569)

[Sameer Sahasrabuddhe via llvm-commits]

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@@ -248,15 +260,19 @@ class MachineInstr
     size_t numTrailingObjects(OverloadToken<uint32_t>) const {
       return HasCFIType;
     }
+    size_t numTrailingObjects(OverloadToken<MMRAMetadata>) const {
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ssahasra wrote:

I don't really grok how trailing objects are implemented, but this smells wrong to me. Shouldn't this function be folded into the overload for MDNode* just above? What makes this metadata different from the other metadata?

https://github.com/llvm/llvm-project/pull/78569