gcc/testsuite/gcc.target/i386/pr57459.c

   1 /* PR rtl-optimization/57459 */
   2 /* { dg-do run } */
   3 /* { dg-options "-fno-inline -O2 -minline-all-stringops -fno-omit-frame-pointer" } */
   4
   5 int total1[10], total2[10], total3[10], total4[10], total5[10], a[20];
   6 int len;
   7
   8 void stackclean() {
   9   void *ptr = __builtin_alloca(20000);
  10   __builtin_memset(ptr, 0, 20000);
  11 }
  12
  13 void foo(const char *s) {
  14   int r1 = a[1];
  15   int r2 = a[2];
  16   int r3 = a[3];
  17   int r4 = a[4];
  18   int r5 = a[5];
  19
  20   len =  __builtin_strlen(s);
  21
  22   if (s != 0)
  23     return;
  24
  25   while (r1) {
  26    total1[r1] = r1;
  27    r1--;
  28   }
  29
  30   while (r2) {
  31    total2[r2] = r2;
  32    r2--;
  33   }
  34
  35   while (r3) {
  36    total3[r3] = r3;
  37    r3--;
  38   }
  39
  40   while (r4) {
  41    total4[r4] = r4;
  42    r4--;
  43   }
  44
  45   while (r5) {
  46    total5[r5] = r5;
  47    r5--;
  48   }
  49 }
  50
  51 extern void abort (void);
  52
  53 int main() {
  54   stackclean();
  55   foo("abcdefgh");
  56   if (len != 8)
  57     abort ();
  58   return 0;
  59 }
  60