gcc/testsuite/gcc.dg/tree-ssa/pr34146.c

   1 /* PR c/34146 */
   2 /* { dg-do compile } */
   3 /* { dg-options "-O2 -fdump-tree-gimple" } */
   4
   5 struct A
   6 {
   7   int f1, f2, f3;
   8 };
   9
  10 struct B
  11 {
  12   struct A g1, g2;
  13 };
  14
  15 struct C
  16 {
  17   struct B h1, h2;
  18 };
  19
  20 typedef union
  21 {
  22   struct C c;
  23   char s[4];
  24   long int a;
  25 } T;
  26
  27 void test (T *);
  28
  29 void
  30 foo (void)
  31 {
  32   T t = { { { { 0, 0, 0 }, { 0, 0, 0 } }, { { 0, 0, 0 }, { 0, 0, 0 } } } };
  33   test (&t);
  34 }
  35
  36 void
  37 bar (void)
  38 {
  39   T t = { { { { 0, 0, 0 }, (struct A) { 0, 0, 0 } },
  40             (struct B) { (struct A) { 0, 0, 0 }, { 0, 0, 0 } } } };
  41   test (&t);
  42 }
  43
  44 void
  45 baz (void)
  46 {
  47   T t = { { { { 0, 0, 0 }, (struct A) { 1, 1, 1 } },
  48             (struct B) { (struct A) { 0, 0, 0 }, { 1, 1, 1 } } } };
  49   test (&t);
  50 }
  51
  52 /* { dg-final { scan-tree-dump-not "t = D" "gimple"} } */
  53 /* { dg-final { scan-tree-dump-not "t\.c\.h\[12\] = D" "gimple"} } */
  54 /* { dg-final { scan-tree-dump-not "\.g\[12\] = D" "gimple"} } */