gcc/testsuite/gcc.dg/loop-3.c

   1 /* PR optimization/13985 */
   2 /* Copied from gcc.c-torture/compile/930621-1.c */
   3
   4 /* { dg-do compile } */
   5 /* { dg-options "-O3" } */
   6 /* { dg-options "-O3 -mtune=i386" { target { { i?86-*-* x86_64-*-* } && ia32 } } } */
   7 /* { dg-add-options stack_size } */
   8
   9 #if defined(STACK_SIZE) && (STACK_SIZE < 65536)
  10 # define BYTEMEM_SIZE 10000L
  11 #endif
  12
  13 #ifndef BYTEMEM_SIZE
  14 # define BYTEMEM_SIZE 45000L
  15 #endif
  16
  17 int bytestart[5000 + 1];
  18 unsigned char modtext[400 + 1];
  19 unsigned char bytemem[2][BYTEMEM_SIZE + 1];
  20
  21 long
  22 modlookup (int l)
  23 {
  24   signed char c;
  25   long j;
  26   long k;
  27   signed char w;
  28   long p;
  29   while (p != 0)
  30     {
  31       while ((k < bytestart[p + 2]) && (j <= l) && (modtext[j] == bytemem[w][k]))
  32         {
  33           k = k + 1;
  34           j = j + 1;
  35         }
  36       if (k == bytestart[p + 2])
  37         if (j > l)
  38           c = 1;
  39         else c = 4;
  40       else if (j > l)
  41         c = 3;
  42       else if (modtext[j] < bytemem[w][k])
  43         c = 0;
  44       else c = 2;
  45     }
  46 }