gcc/testsuite/gcc.dg/simd-4.c

/* { dg-do compile } */

typedef int myint;

float __attribute__((vector_size(16))) b;
int __attribute__((vector_size(16))) d;
myint __attribute__((vector_size(16))) d2;
unsigned int __attribute__((vector_size(16))) e;

void foo()
{
	b + d; /* { dg-error "invalid operands to binary" } */
	d += e;
	d2 += d;
}