gimple-ssa-split-paths.c (is_feasible_trace): Remove duplicated code block.

2018-12-14  Richard Biener  <rguenther@suse.de>

	* gimple-ssa-split-paths.c (is_feasible_trace): Remove
	duplicated code block.

From-SVN: r267126

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index aa260995e8ddc9f6cbd45d19859cf751b4b98a04..5d81eb0beb96236d01a3e86402279a626f17a77b 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2018-12-14  Richard Biener  <rguenther@suse.de>
+
+       * gimple-ssa-split-paths.c (is_feasible_trace): Remove
+       duplicated code block.
+
 2018-12-14  Alan Modra  <amodra@gmail.com>
 
        PR rtl-optimization/88311

diff --git a/gcc/gimple-ssa-split-paths.c b/gcc/gimple-ssa-split-paths.c
index 915965260459e045af73ed36900f979def3fc27a..75f6be8f1cf9871b4bd3448147fd6d1dcff9d24b 100644 (file)
--- a/gcc/gimple-ssa-split-paths.c
+++ b/gcc/gimple-ssa-split-paths.c
@@ -249,52 +249,6 @@ is_feasible_trace (basic_block bb)
        }
     }
 
-  /* Canonicalize the form.  */
-  if (num_stmts_in_pred1 == 0 && num_stmts_in_pred2 == 1)
-    {
-      std::swap (pred1, pred2);
-      std::swap (num_stmts_in_pred1, num_stmts_in_pred2);
-    }
-
-  /* Another variant.  This one is half-diamond.  */
-  if (num_stmts_in_pred1 == 1 && num_stmts_in_pred2 == 0
-      && dominated_by_p (CDI_DOMINATORS, pred1, pred2))
-    {
-      gimple *stmt1 = last_and_only_stmt (pred1);
-
-      /* The only statement in PRED1 must be an assignment that is
-        not a good candidate for if-conversion.   This may need some
-        generalization.  */
-      if (stmt1 && gimple_code (stmt1) == GIMPLE_ASSIGN)
-       {
-         enum tree_code code1 = gimple_assign_rhs_code (stmt1);
-
-         if (!poor_ifcvt_candidate_code (code1))
-           {
-             tree lhs1 = gimple_assign_lhs (stmt1);
-             tree rhs1 = gimple_assign_rhs1 (stmt1);
-
-             gimple_stmt_iterator gsi;
-             for (gsi = gsi_start_phis (bb); !gsi_end_p (gsi); gsi_next (&gsi))
-               {
-                 gimple *phi = gsi_stmt (gsi);
-                 if ((gimple_phi_arg_def (phi, 0) == lhs1
-                      && gimple_phi_arg_def (phi, 1) == rhs1)
-                     || (gimple_phi_arg_def (phi, 1) == lhs1
-                         && gimple_phi_arg_def (phi, 0) == rhs1))
-                   {
-                     if (dump_file && (dump_flags & TDF_DETAILS))
-                       fprintf (dump_file,
-                                "Block %d appears to be a join point for "
-                                "if-convertable half-diamond.\n",
-                                bb->index);
-                     return false;
-                   }
-               }
-           }
-       }
-    }
-
   /* If the joiner has no PHIs with useful uses there is zero chance
      of CSE/DCE/jump-threading possibilities exposed by duplicating it.  */
   bool found_useful_phi = false;