gcc/testsuite/gcc.dg/tree-ssa/sra-5.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O1 -fdump-tree-optimized" } */
   3
   4 /* Tests for SRA of unions. */
   5
   6 void link_error (void);
   7
   8 typedef union testunion
   9 {
  10   double d;
  11   char f1;
  12 } testunion;
  13
  14 void
  15 copyunion1 (testunion param)
  16 {
  17   testunion local;
  18   param.f1 = 0;
  19   local = param;
  20   if (local.f1 != 0)
  21     link_error ();
  22 }
  23
  24 void
  25 copyunion11 (testunion *param)
  26 {
  27   testunion local;
  28   param->f1 = 0;
  29   local = *param;
  30   if (local.f1 != 0)
  31     link_error ();
  32 }
  33
  34 void
  35 copyunion111 (testunion param)
  36 {
  37   testunion *local = &param;
  38   param.f1 = 0;
  39   if (local->f1 != 0)
  40     link_error ();
  41 }
  42
  43 testunion globuf;
  44 void
  45 copyunion1111 (void)
  46 {
  47   testunion local;
  48   globuf.f1 = 0;
  49   local = globuf;
  50   if (local.f1 != 0)
  51     link_error ();
  52 }
  53
  54 void
  55 copyunion11111 (void)
  56 {
  57   testunion *local = &globuf;
  58   globuf.f1 = 0;
  59   if (local->f1 != 0)
  60     link_error ();
  61 }
  62
  63 void
  64 copyunion111111 (testunion param)
  65 {
  66   static testunion local;
  67   param.f1 = 0;
  68   local = param;
  69   if (local.f1 != 0)
  70     link_error ();
  71 }
  72
  73 /* There should be no reference to link_error. */
  74 /* { dg-final { scan-tree-dump-times "link_error" 0 "optimized"} } */