tree-ssa-uninit.c (find_uninit_use): Disregard debug stmts, use operand helpers.

2010-08-18  Richard Guenther  <rguenther@suse.de>

	* tree-ssa-uninit.c (find_uninit_use): Disregard debug stmts,
	use operand helpers.

From-SVN: r163340

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index dfe7de21ae0ce7fc9f2141598a1a2e817d6fa138..341820d7103360ea092a0ab136e29bcb1fadfd47 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2010-08-18  Richard Guenther  <rguenther@suse.de>
+
+       * tree-ssa-uninit.c (find_uninit_use): Disregard debug stmts,
+       use operand helpers.
+
 2010-08-18  Paolo Bonzini  <bonzini@gnu.org>
 
        PR middle-end/45292

diff --git a/gcc/tree-ssa-uninit.c b/gcc/tree-ssa-uninit.c
index 16adde3b070b304bdd51a1bef63a097c2521522b..4398db7c6d2e8468c035bafee802af5b3b848042 100644 (file)
--- a/gcc/tree-ssa-uninit.c
+++ b/gcc/tree-ssa-uninit.c
@@ -1598,27 +1598,17 @@ find_uninit_use (gimple phi, unsigned uninit_opnds,
       struct pointer_set_t *visited_phis;
       basic_block use_bb;
 
-      use_stmt = use_p->loc.stmt;
+      use_stmt = USE_STMT (use_p);
+      if (is_gimple_debug (use_stmt))
+       continue;
 
       visited_phis = pointer_set_create ();
 
-      use_bb = gimple_bb (use_stmt);
       if (gimple_code (use_stmt) == GIMPLE_PHI)
-        {
-         unsigned i, n;
-          n = gimple_phi_num_args (use_stmt);
-
-          /* Find the matching phi argument of the use.  */
-          for (i = 0; i < n; ++i)
-            {
-               if (gimple_phi_arg_def_ptr (use_stmt, i) == use_p->use)
-                {
-                   edge e = gimple_phi_arg_edge (use_stmt, i);
-                   use_bb = e->src;
-                    break;
-                }
-           }
-       }
+       use_bb = gimple_phi_arg_edge (use_stmt,
+                                     PHI_ARG_INDEX_FROM_USE (use_p))->src;
+      else
+       use_bb = gimple_bb (use_stmt);
 
       if (is_use_properly_guarded (use_stmt,
                                    use_bb,