[clang] [Clang/AMDGPU] Zero sized arrays not allowed in HIP device code. (PR #113470)

[Eli Friedman via cfe-commits]

================
@@ -8732,6 +8732,18 @@ void Sema::CheckVariableDeclarationType(VarDecl *NewVD) {
     }
   }
 
+  // zero sized static arrays are not allowed in HIP device functions
+  if (getLangOpts().HIP &&
+      DeclAttrsMatchCUDAMode(getLangOpts(), getCurFunctionDecl())) {
----------------
efriedma-quic wrote:

The check there is `isDeviceSideDecl == LangOpts.CUDAIsDevice`... but you don't 
want to diagnose this on host, do you?  (The regression test only checks the 
-fcuda-is-device case.)

https://github.com/llvm/llvm-project/pull/113470
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