gcc/testsuite/gcc.c-torture/execute/20031012-1.c

   1 /* { dg-add-options stack_size } */
   2
   3 /* PR optimization/8750
   4    Used to fail under Cygwin with
   5    -O2 -fomit-frame-pointer
   6    Testcase by David B. Trout     */
   7
   8 #if defined(STACK_SIZE) && STACK_SIZE < 16000
   9 #define ARRAY_SIZE (STACK_SIZE / 2)
  10 #define STRLEN     (ARRAY_SIZE - 9)
  11 #else
  12 #define ARRAY_SIZE 15000
  13 #define STRLEN     13371
  14 #endif
  15
  16 extern void *memset (void *, int, __SIZE_TYPE__);
  17 extern void abort (void);
  18
  19 static void foo ()
  20 {
  21     char a[ARRAY_SIZE];
  22
  23     a[0]=0;
  24     memset( &a[0], 0xCD, STRLEN );
  25     a[STRLEN]=0;
  26     if (__builtin_strlen(a) != STRLEN)
  27       abort ();
  28 }
  29
  30 int main ( int argc, char* argv[] )
  31 {
  32     foo();
  33     return 0;
  34 }