gcc/testsuite/gcc.target/i386/sseregparm-2.c

/* { dg-do compile } */
/* { dg-options "-mno-sse" } */
/* { dg-require-effective-target ia32 } */

float essef(float) __attribute__((sseregparm));
double essed(double) __attribute__((sseregparm));
float __attribute__((sseregparm, noinline)) ssef(float f) { return f; } /* { dg-error "SSE" } */
double __attribute__((sseregparm, noinline)) ssed(double d) { return d; } /* { dg-error "SSE" } */
extern double d;
extern float f;
void test(void)
{
  f = essef(f);
  d = essed(d);
  f = ssef(f);
  d = ssed(d);
}