[llvm] [CtxProf] emit fatal usage error when flatten-prethinlink runs without guid metadata (PR #194383)

[Aiden Grossman via llvm-commits]

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@@ -441,7 +441,9 @@ GlobalValue::GUID AssignGUIDPass::getGUID(const Function &F) {
     return F.getGUID();
   }
   auto *MD = F.getMetadata(GUIDMetadataName);
-  assert(MD && "guid not found for defined function");
+  if (!MD)
+    reportFatalUsageError(
+        "this pass requires the GUID metadata to be available.");
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boomanaiden154 wrote:

s/the GUID metadata/GUID metadata

metadata is a mass noun.

https://github.com/llvm/llvm-project/pull/194383