re PR tree-optimization/47890 (internal compiler error: in…

re PR tree-optimization/47890 (internal compiler error: in vect_get_vec_def_for_stmt_copy, at tree-vect-stmts.c:1186)

2011-03-01  Richard Guenther  <rguenther@suse.de>

	PR tree-optimization/47890
	* tree-vect-loop.c (get_initial_def_for_induction): Set
	related stmt properly.

	* gcc.dg/torture/pr47890.c: New testcase.

From-SVN: r170593

gcc/ChangeLog

 2011-03-01  Richard Guenther  <rguenther@suse.de>
 
+	PR tree-optimization/47890
+	* tree-vect-loop.c (get_initial_def_for_induction): Set
+	related stmt properly.
+
+2011-03-01  Richard Guenther  <rguenther@suse.de>
+
 	PR lto/47924
 	* lto-streamer.c (lto_record_common_node): Also register
 	the canonical type.

gcc/testsuite/ChangeLog

 2011-03-01  Richard Guenther  <rguenther@suse.de>
 
+	PR tree-optimization/47890
+	* gcc.dg/torture/pr47890.c: New testcase.
+
+2011-03-01  Richard Guenther  <rguenther@suse.de>
+
 	PR lto/47924
 	* gcc.dg/lto/pr47924_0.c: New testcase.
 

gcc/testsuite/gcc.dg/torture/pr47890.c

+/* { dg-do compile } */
+
+void f(char *s)
+{
+  signed short i;
+
+  for (i = 0; i < 19; i = i + 1)
+    s[i] = i;
+}

gcc/tree-vect-loop.c

@@ -2886,6 +2886,10 @@ get_initial_def_for_induction (gimple iv_phi)
       gimple_assign_set_lhs (new_stmt, induc_def);
       si = gsi_start_bb (bb);
       gsi_insert_before (&si, new_stmt, GSI_SAME_STMT);
+      set_vinfo_for_stmt (new_stmt,
+			  new_stmt_vec_info (new_stmt, loop_vinfo, NULL));
+      STMT_VINFO_RELATED_STMT (vinfo_for_stmt (new_stmt))
+	= STMT_VINFO_RELATED_STMT (vinfo_for_stmt (induction_phi));
     }
 
   return induc_def;