[clang] FunctionDecl::getFunctionTypeLoc: ignore function type attributes (PR #118420)

[Aaron Ballman via cfe-commits]

================
@@ -3876,8 +3876,17 @@ bool FunctionDecl::doesDeclarationForceExternallyVisibleDefinition() const {
 
 FunctionTypeLoc FunctionDecl::getFunctionTypeLoc() const {
   const TypeSourceInfo *TSI = getTypeSourceInfo();
-  return TSI ? TSI->getTypeLoc().IgnoreParens().getAs<FunctionTypeLoc>()
-             : FunctionTypeLoc();
+
+  if (!TSI)
+    return FunctionTypeLoc();
+
+  TypeLoc TL = TSI->getTypeLoc().IgnoreParens();
+
+  // ignore function type attributes
----------------
AaronBallman wrote:

Are there other sugars we need to ignore? e.g., a `ParenType` via:
```
void (foo)(int f) {}
```


https://github.com/llvm/llvm-project/pull/118420