gcc/testsuite/gcc.target/arm/pr42495.c

   1 /* { dg-options "-mthumb -Os -fpic -fdump-rtl-hoist" }  */
   2 /* { dg-require-effective-target arm_thumb1_ok } */
   3 /* { dg-require-effective-target fpic } */
   4 /* Make sure all calculations of gObj's address get hoisted to one location.  */
   5 /* { dg-final { scan-rtl-dump "PRE/HOIST: end of bb .* copying expression" "hoist" } } */
   6
   7 struct st_a {
   8    int data;
   9 };
  10
  11 struct st_b {
  12    struct st_a *p_a;
  13     struct st_b *next;
  14 };
  15
  16 extern struct st_b gObj;
  17 extern void foo(int, struct st_b*);
  18
  19 int goo(struct st_b * obj) {
  20    struct st_a *pa;
  21    if (gObj.p_a->data != 0) {
  22      foo(gObj.p_a->data, obj);
  23    }
  24    pa = obj->p_a;
  25    if (pa == 0) {
  26      return 0;
  27    } else if (pa == gObj.p_a) {
  28      return 0;
  29    }
  30    return pa->data;
  31 }