gcc/testsuite/gcc.dg/tree-ssa/ssa-dom-branch-1.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -w -fdump-tree-dom2-details" } */
   3
   4 typedef struct rtx_def *rtx;
   5 struct rtx_def
   6 {
   7   int code;
   8   rtx rt_rtx;
   9 };
  10 rtx
  11 try_combine (rtx i1, rtx newpat)
  12 {
  13   rtx temp;
  14   if (i1 && (temp = ((((((newpat->rt_rtx, ((((temp)->code) == 42)))))))))
  15       && ((temp =
  16         (((((((((((newpat)->rt_rtx),
  17                  ((((temp)->code) == 42) && arf ())))))))))))))
  18     ;
  19   else if (i1 && foo ());
  20 }
  21
  22 /* There should be two tests against i1.  One from the hash table
  23    dumps, one in the code itself.  */
  24 /* { dg-final { scan-tree-dump-times "if .i1_" 2 "dom2"} } */
  25
  26 /* There should be no actual jump threads realized by DOM.  The
  27    legitimize jump threads are handled in VRP and those discovered
  28    by DOM are subsumed by collapsing a conditional.  */
  29 /* { dg-final { scan-tree-dump-not "Threaded" "dom2"} } */