gcc/testsuite/gcc.dg/tree-ssa/pr71179.c

/* { dg-do compile } */
/* { dg-options "-O3 -ffast-math -Wno-psabi" } */

typedef float __m128 __attribute__ ((__vector_size__ (16), __may_alias__));

__m128 foo (__m128 a)
{
  return a + a;
}