[clang] [CIR] Upstream basic support for ArrayType (PR #130502)

[Erich Keane via cfe-commits]

================
@@ -33,6 +33,14 @@ class CIRGenBuilderTy : public cir::CIRBaseBuilderTy {
       llvm_unreachable("NYI: PPC double-double format for long double");
     llvm_unreachable("Unsupported format for long double");
   }
+
+  bool isSized(mlir::Type ty) {
+    if (mlir::isa<cir::PointerType, cir::ArrayType, cir::BoolType,
+                  cir::IntType>(ty))
+      return true;
+    assert(0 && "Unimplemented size for type");
----------------
erichkeane wrote:

looks like we've been doing `llvm_unreachable` for not yet implemented.  That said, its pretty weird that asking this question (`isSized`) is a not-implemented?  What sort of stuff is missing here that we cannot just answer this question?

https://github.com/llvm/llvm-project/pull/130502