[llvm] [CGProfile] Fix unhandled error crash on empty canonical function names (PR #201821)

[Arseniy Obolenskiy via llvm-commits]

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@@ -0,0 +1,10 @@
+; RUN: opt < %s -passes='cg-profile' -S | FileCheck %s
+
+; A function whose entire name is a strippable suffix (e.g. ".llvm.123")
+; canonicalizes to an empty name. Building the InstrProfSymtab
+; for such a name returns an error that cg-profile intentionally ignores.
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aobolensk wrote:

That's true. Removed this sentence from the comment

https://github.com/llvm/llvm-project/pull/201821