[llvm] Store GUIDs in metadata (PR #133682)

[Owen Rodley via llvm-commits]

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@@ -78,6 +78,46 @@ GlobalValue::getGUIDAssumingExternalLinkage(StringRef GlobalIdentifier) {
   return MD5Hash(GlobalIdentifier);
 }
 
+void GlobalValue::assignGUID() {
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orodley wrote:

`getMetadata` is protected, so it does need to be on `GlobalValue`

https://github.com/llvm/llvm-project/pull/133682