gcc/testsuite/gcc.dg/tree-ssa/ssa-dom-thread-4.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -fdump-tree-dom1-details" } */
   3 /* { dg-additional-options "-mbranch-cost=2" { target s390*-*-* } } */
   4 struct bitmap_head_def;
   5 typedef struct bitmap_head_def *bitmap;
   6 typedef const struct bitmap_head_def *const_bitmap;
   7 typedef unsigned long BITMAP_WORD;
   8 typedef struct bitmap_element_def
   9 {
  10   struct bitmap_element_def *next;
  11   unsigned int indx;
  12 } bitmap_element;
  13
  14
  15
  16
  17
  18
  19
  20
  21
  22 unsigned char
  23 bitmap_ior_and_compl (bitmap dst, const_bitmap a, const_bitmap b,
  24                       const_bitmap kill)
  25 {
  26   unsigned char changed = 0;
  27
  28   bitmap_element *dst_elt;
  29   const bitmap_element *a_elt, *b_elt, *kill_elt, *dst_prev;
  30
  31   while (a_elt || b_elt)
  32     {
  33       unsigned char new_element = 0;
  34
  35       if (b_elt)
  36         while (kill_elt && kill_elt->indx < b_elt->indx)
  37           kill_elt = kill_elt->next;
  38
  39       if (b_elt && kill_elt && kill_elt->indx == b_elt->indx
  40           && (!a_elt || a_elt->indx >= b_elt->indx))
  41         {
  42           bitmap_element tmp_elt;
  43           unsigned ix;
  44
  45           BITMAP_WORD ior = 0;
  46
  47               changed = bitmap_elt_ior (dst, dst_elt, dst_prev,
  48                                         a_elt, &tmp_elt, changed);
  49
  50         }
  51
  52     }
  53
  54
  55   return changed;
  56 }
  57 /* The block starting the second conditional has  3 incoming edges,
  58    we should thread all three, but due to a bug in the threading
  59    code we missed the edge when the first conditional is false
  60    (b_elt is zero, which means the second conditional is always
  61    zero.  */
  62 /* { dg-final { scan-tree-dump-times "Threaded" 3 "dom1" { target { ! mips*-*-* } } } } */
  63 /* MIPS defines LOGICAL_OP_NON_SHORT_CIRCUIT to 0, so we split var1 || var2
  64    into two conditions, rather than use (var1 != 0) | (var2 != 0).  */
  65 /* { dg-final { scan-tree-dump-times "Threaded" 4 "dom1" { target mips*-*-* } } } */
  66 /* { dg-final { cleanup-tree-dump "dom1" } } */
  67