gcc/testsuite/gcc.dg/tree-ssa/20030807-5.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O1 -fdump-tree-dom2" } */
   3
   4 extern void abort (void);
   5 struct rtx_def;
   6 typedef struct rtx_def *rtx;
   7
   8
   9 struct rtx_def
  10 {
  11
  12   int code;
  13   unsigned int unchanging:1;
  14
  15 };
  16 static rtx current_sym_addr;
  17
  18 int
  19 foo ()
  20 {
  21   if (current_sym_addr->code == 42
  22       && (({
  23                rtx _rtx = current_sym_addr;
  24                if (((_rtx)->code) != 42)
  25                  abort ();
  26                _rtx;}
  27            )->unchanging))
  28     return 0;
  29 }
  30
  31 /* There should be precisely one load of ->code.  If there is
  32    more than, then the dominator optimizations failed.  */
  33 /* { dg-final { scan-tree-dump-times "->code" 1 "dom2"} } */
  34
  35 /* There should be two IF statements.  One for 'current_sym_addr->code == 42'.
  36    The other one for '(EXPR)->unchanging'.  */
  37 /* { dg-final { scan-tree-dump-times "if " 2 "dom2"} } */
  38
  39 /* { dg-final { cleanup-tree-dump "dom2" } } */