[clang] [Clang][Sema] Do not accept "vector _Complex" for AltiVec/ZVector (PR #90467)

[Chen Zheng via cfe-commits]

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@@ -111,6 +111,20 @@ vector __bool long long v_bll4;      // expected-error {{use of 'long long' with
 #endif
 __vector long double  vv_ld3;        // expected-error {{cannot use 'long double' with '__vector'}}
 vector long double  v_ld4;           // expected-error {{cannot use 'long double' with '__vector'}}
+vector float _Complex v_cf;          // expected-error {{cannot use '_Complex' with '__vector'}}
+vector double _Complex v_cd;         // expected-error {{cannot use '_Complex' with '__vector'}}
+#ifndef __VSX__
+                                     // expected-error at -2 {{use of 'double' with '__vector' requires VSX support to be enabled (available on POWER7 or later)}}
+#endif
+vector long double _Complex v_cld;   // expected-error {{cannot use '_Complex' with '__vector'}}
+                                     // expected-error at -1 {{cannot use 'long double' with '__vector'}}
+__vector float _Complex v_cf2;       // expected-error {{cannot use '_Complex' with '__vector'}}
+__vector double _Complex v_cd2;      // expected-error {{cannot use '_Complex' with '__vector'}}
+#ifndef __VSX__
+                                     // expected-error at -2 {{use of 'double' with '__vector' requires VSX support to be enabled (available on POWER7 or later)}}
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chenzheng1030 wrote:

Error message `cannot use '_Complex' with '__vector'` sounds like good enough. This error message is not accurate at all?

https://github.com/llvm/llvm-project/pull/90467