[clang] [Clang] allow restrict qualifier for array types with pointer types as element types (PR #120896)

[Aaron Ballman via cfe-commits]

================
@@ -9,20 +9,20 @@ typedef int (*T)[2];
 restrict T x;
 
 typedef int *S[2];
-restrict S y; // expected-error {{restrict requires a pointer or reference 
('S' (aka 'int *[2]') is invalid)}}
-
-
+restrict S y; // expected-warning {{'restrict' qualifier on an array of 
pointers is a C23 extension}}
 
 // int128_t is available.
 int a(void) {
   __int128_t s;
   __uint128_t t;
-}
+} // expected-warning {{non-void function does not return a value}}
+
 // but not a keyword
 int b(void) {
   int __int128_t;
   int __uint128_t;
-}
+} // expected-warning {{non-void function does not return a value}}
+
----------------
AaronBallman wrote:

For these tests, I'd say it's better to change the `int` return type to `void` 
to silence the warning; neither of the tests are testing the behavior of the 
return anyway.

https://github.com/llvm/llvm-project/pull/120896
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