Update global_array.hlsl SPIR-V convergence test to use custom struct

Author: hekota

clang/test/CodeGenHLSL/convergence/global_array.hlsl

@@ -6,9 +6,15 @@
 
 // CHECK: [[loop_entry]]:
 // CHECK: [[loop_token:%.*]] = call token @llvm.experimental.convergence.loop() [ "convergencectrl"(token [[entry_token]]) ]
-// CHECK: call void {{.*}} [ "convergencectrl"(token [[loop_token]]) ]
+// CHECK: call spir_func void {{.*}} [ "convergencectrl"(token [[loop_token]]) ]
 // CHECK: br i1 {{%.*}} label {{%.*}} label %[[loop_entry]]
-RWBuffer<float> e[2];
+
+struct S {
+    int i;
+    S() { i = 10; }
+};
+
+static S s[2];
 
 [numthreads(4,1,1)]
 void main() {