gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-61.c

   1 /* { dg-do link } */
   2 /* { dg-options "-O -fdump-tree-fre1-details" } */
   3
   4 void link_error (void);
   5
   6 void test1 (int *p, int *q)
   7 {
   8   *p = 1;
   9   *q = 1;
  10   if (*p != 1)
  11     link_error ();
  12 }
  13
  14 void test2 (int *p, int *q, int t)
  15 {
  16   *p = t;
  17   *q = t;
  18   if (*p != t)
  19     link_error ();
  20 }
  21
  22 void test3 (int *q, int *p)
  23 {
  24   int tem = *p;
  25   *q = tem;
  26   if (*p != tem)
  27     link_error ();
  28 }
  29
  30 char a[4];
  31 struct A { char a[4]; };
  32 void test4 (struct A *p)
  33 {
  34   a[0] = p->a[0];
  35   a[0] = p->a[0];
  36   a[0] = p->a[0];
  37 }
  38
  39 int main() { return 0; }
  40
  41 /* { dg-final { scan-tree-dump-times "Replaced \\\*p" 3 "fre1" } } */
  42 /* { dg-final { scan-tree-dump-times "Replaced p_.\\(D\\)->" 2 "fre1" } } */
  43 /* { dg-final { scan-tree-dump-times "Deleted redundant store a\\\[0\\\]" 2 "fre1" } } */