[clang] [clang] Function type attribute to prevent CFI instrumentation (PR #135836)

[Erich Keane via cfe-commits]

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@@ -3027,9 +3027,13 @@ static LValue EmitFunctionDeclLValue(CodeGenFunction &CGF, const Expr *E,
                                      GlobalDecl GD) {
   const FunctionDecl *FD = cast<FunctionDecl>(GD.getDecl());
   llvm::Constant *V = CGF.CGM.getFunctionPointer(GD);
+  auto ETy = E->getType();
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erichkeane wrote:

This shouldn't use auto.  
```suggestion
  QualType ETy = E->getType();
```

https://github.com/llvm/llvm-project/pull/135836