gcc/testsuite/gcc.dg/split-8.c

/* { dg-do run } */
/* { dg-require-effective-target split_stack } */
/* { dg-options "-fsplit-stack" } */

/* Testcase for PR86213. On the first call to __morestack there is a live
   value in xmm0, which was being clobbered by a call to getenv().  */

#include <stdlib.h>

double gd[8];
int z;

double bar(double q)  __attribute__ ((noinline));
double foo(double q)  __attribute__ ((noinline));
int ck(double q)  __attribute__ ((noinline));
int main(int argc, char **argv) __attribute__ ((no_split_stack));

double bar(double q)
{
  double d[8];
  for (unsigned i = 0; i < 8; ++i)
    d[i] = gd[8-i-1];
  return q + d[z&3];
}

double foo(double d)
{
  return bar(d);
}

int ck(double d)
{
  if (d != 64.0)
    abort();
  return 0;
}

typedef double (*fp)(double);
fp g = foo;

int main(int argc, char **argv) {
  return ck(g(64.0));
}