Address code review comments

Author: AmrDeveloper

clang/lib/CIR/CodeGen/CIRGenBuilder.h

@@ -83,8 +83,8 @@ class CIRGenBuilderTy : public cir::CIRBaseBuilderTy {
                   cir::IntType>(ty))
       return true;
 
-    if (mlir::isa<cir::VectorType>(ty))
-      return isSized(mlir::cast<cir::VectorType>(ty).getElementType());
+    if (const auto vt = mlir::dyn_cast<cir::VectorType>(ty))
+      return isSized(vt.getElementType());
 
     assert(!cir::MissingFeatures::unsizedTypes());
     return false;

clang/lib/CIR/Dialect/IR/CIRTypes.cpp

@@ -669,8 +669,7 @@ mlir::LogicalResult cir::VectorType::verify(
       isAnyFloatingPointType(elementType))
     return success();
 
-  return emitError() << "expected LLVM-compatible fixed-vector type "
-                        "to be either builtin or LLVM dialect type";
+  return emitError() << "unsupported element type for CIR vector";
 }
 
 //===----------------------------------------------------------------------===//

clang/test/CIR/IR/invalid-vector.cir

@@ -4,7 +4,7 @@
 
 module  {
 
-// expected-error @below {{expected LLVM-compatible fixed-vector type}}
+// expected-error @below {{unsupported element type for CIR vector}}
 cir.global external @vec_b = #cir.zero : !cir.vector<4 x !cir.array<!s32i x 10>>
 
 }