gcc/testsuite/gcc.dg/tree-ssa/alias-18.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -fdump-tree-fre-details -fdump-tree-optimized --param max-aliased-vops=0" } */
   3
   4 struct A {
   5   int i;
   6   int j;
   7   float x;
   8 };
   9 struct B {
  10   struct A a;
  11   int k;
  12 };
  13
  14 int g;
  15
  16 int test0 (struct A *p, struct A *q)
  17 {
  18   p->i = 0;
  19   q->j = -1;
  20   return p->i;
  21 }
  22
  23 int test1 (struct A *p, struct B *q)
  24 {
  25   p->i = 1;
  26   q->k = -1;
  27   return p->i;
  28 }
  29
  30 int test2 (struct A *p, struct B *q)
  31 {
  32   p->i = 2;
  33   q->a.i = -1;
  34   return p->i;
  35 }
  36
  37 int test3 (struct A *p, struct B *q)
  38 {
  39   p->i = 3;
  40   q->a.j = -1;
  41   return p->i;
  42 }
  43
  44 int test4 (struct A *p)
  45 {
  46   g = 4;
  47   p->i = -1;
  48   return g;
  49 }
  50
  51 int test5 (struct A *p)
  52 {
  53   p->i = 5;
  54   g = -1;
  55   return p->i;
  56 }
  57
  58 int test6 (struct A *p, int *q)
  59 {
  60   p->i = 6;
  61   *q = -1;
  62   return p->i;
  63 }
  64
  65 int test7 (struct A *p, int *q)
  66 {
  67   p->j = 7;
  68   *q = -1;
  69   return p->j;
  70 }
  71
  72 int test8 (struct A *p, int *q)
  73 {
  74   *q = 8;
  75   p->x = -1;
  76   return *q;
  77 }
  78
  79 /* { dg-final { scan-tree-dump "with 0" "fre" } } */
  80 /* { dg-final { scan-tree-dump "with 1" "fre" { xfail *-*-* } } } */
  81 /* { dg-final { scan-tree-dump "with 3" "fre" } } */
  82 /* { dg-final { scan-tree-dump "with 4" "fre" } } */
  83 /* { dg-final { scan-tree-dump "with 5" "fre" } } */
  84 /* { dg-final { scan-tree-dump "with 8" "fre" } } */
  85 /* { dg-final { scan-tree-dump-not "return 2;" "optimized" } } */
  86 /* { dg-final { scan-tree-dump-not "return 6;" "optimized" } } */
  87 /* { dg-final { scan-tree-dump-not "return 7;" "optimized" } } */
  88 /* { dg-final { scan-tree-dump-not "return -1;" "optimized" } } */
  89 /* { dg-final { cleanup-tree-dump "fre" } } */
  90 /* { dg-final { cleanup-tree-dump "optimized" } } */