[clang] [llvm] Disable PGO instrumentation on naked function (PR #75224)

[Fangrui Song via cfe-commits]

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@@ -892,6 +892,10 @@ void CodeGenFunction::StartFunction(GlobalDecl GD, QualType RetTy,
     }
   }
 
+  if (FD->hasAttr<NakedAttr>()) {
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MaskRay wrote:

This should not be needed. The llvm change is sufficient to work with all frontends including clang.

https://github.com/llvm/llvm-project/pull/75224