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/* Check local register variables using a register conventionally

   used as the frame pointer aren't clobbered under high register pressure.  */

/* { dg-do run } */

/* { dg-options "-Os -mthumb -fomit-frame-pointer" } */

#include <stdlib.h>

int global=5;

void __attribute__((noinline)) foo(int p1, int p2, int p3, int p4)

{

  if (global != 5 || p1 != 1 || p2 != 2 || p3 != 3 || p4 != 4)

    abort();

}

int __attribute__((noinline)) test(int a, int b, int c, int d)

{

  register unsigned long r __asm__("r7") = 0xdeadbeef;

  int e;

  /* ABCD are live after the call which should be enough

     to cause r7 to be used if it weren't for the register variable.  */

  foo(a,b,c,d);

  e = 0;

  __asm__ __volatile__ ("mov %0, %2"

                        : "=r" (e)

                        : "0" (e), "r" (r));

  global = a+b+c+d;

  return e;

}

int main()

{

  if (test(1, 2, 3, 4) != 0xdeadbeef)

    abort();

  if (global != 10)

    abort();

  return 0;

}