[llvm] [profcheck] Exclude `naked`, asm-only functions from profcheck (PR #168447)

[Mircea Trofin via llvm-commits]

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@@ -65,11 +65,26 @@ class ProfileInjector {
   ProfileInjector(Function &F, FunctionAnalysisManager &FAM) : F(F), FAM(FAM) {}
   bool inject();
 };
+
+bool isAsmOnly(const Function &F) {
+  if (!F.hasFnAttribute(Attribute::AttrKind::Naked))
+    return false;
+  for (const auto &BB : F)
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mtrofin wrote:

I'll land with the expanded check, since the equivalence naked <-> asm only or other implications isn't clear. Easy to evolve later.

https://github.com/llvm/llvm-project/pull/168447