gcc/testsuite/gcc.c-torture/compile/20031125-1.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2" } */
   3 short *_offsetTable;
   4 /* This tests to make sure PRE splits the entry block ->block 0 edge
   5    when there are multiple block 0 predecessors.
   6    This is done so that we don't end up with an insertion on the
   7    entry block -> block 0 edge which would require a split at insertion
   8    time.
   9    PR 13163.  */
  10 void proc4WithoutFDFE(char *dst, const char *src, int next_offs, int bw,
  11                 int bh, int pitch)
  12 {
  13         do {
  14                 int i = bw;
  15                 int code = *src++;
  16                 int x, l;
  17                 int length = *src++ + 1;
  18
  19                 for (l = 0; l < length; l++) {
  20                         int x;
  21
  22                         for (x = 0; x < 4; x++) ;
  23                         if (i == 0)
  24                                 dst += pitch * 3;
  25                 }
  26                 char *dst2 = dst + _offsetTable[code] + next_offs;
  27
  28                 for (x = 0; x < 4; x++) {
  29                         int j = 0;
  30                         (dst + pitch * x)[j] = (dst2 + pitch * x)[j];
  31                 }
  32                 dst += pitch * 3;
  33         } while (--bh);
  34 }
  35
  36