Add testcase for PR42729 and fix handling of gimple_debug info.

2010-07-15  Sebastian Pop  <sebastian.pop@amd.com>

	* sese.c (rename_uses): Handl unconditionally gimple_debug statements.

	* gcc.dg/graphite/pr42729.c: New.

From-SVN: r163146

gcc/ChangeLog

 2010-08-02  Sebastian Pop  <sebastian.pop@amd.com>
 
+	* sese.c (rename_uses): Handl unconditionally gimple_debug statements.
+
+2010-08-02  Sebastian Pop  <sebastian.pop@amd.com>
+
 	* graphite-sese-to-poly.c (rewrite_close_phi_out_of_ssa): Special
 	case non close-phi nodes with one argument.
 

gcc/ChangeLog.graphite

 2010-07-15  Sebastian Pop  <sebastian.pop@amd.com>
 
+	* sese.c (rename_uses): Handl unconditionally gimple_debug statements.
+
+	* gcc.dg/graphite/pr42729.c: New.
+
+2010-07-15  Sebastian Pop  <sebastian.pop@amd.com>
+
 	* graphite-sese-to-poly.c (rewrite_close_phi_out_of_ssa): Special
 	case non close-phi nodes with one argument.
 

gcc/sese.c

@@ -480,6 +480,16 @@ rename_uses (gimple copy, htab_t rename_map, gimple_stmt_iterator *gsi_tgt,
   use_operand_p use_p;
   ssa_op_iter op_iter;
 
+  if (is_gimple_debug (copy))
+    {
+      if (gimple_debug_bind_p (copy))
+	gimple_debug_bind_reset_value (copy);
+      else
+	gcc_unreachable ();
+
+      return;
+    }
+
   FOR_EACH_SSA_USE_OPERAND (use_p, copy, op_iter, SSA_OP_ALL_USES)
     {
       tree old_name = USE_FROM_PTR (use_p);
@@ -501,19 +511,7 @@ rename_uses (gimple copy, htab_t rename_map, gimple_stmt_iterator *gsi_tgt,
 	      || (TREE_CODE (new_expr) != SSA_NAME
 		  && is_gimple_reg (old_name)))
 	    {
-	      tree var;
-
-	      if (is_gimple_debug (copy))
-		{
-		  if (gimple_debug_bind_p (copy))
-		    gimple_debug_bind_reset_value (copy);
-		  else
-		    gcc_unreachable ();
-
-		  break;
-		}
-
-	      var = create_tmp_var (type_old_name, "var");
+	      tree var = create_tmp_var (type_old_name, "var");
 
 	      if (type_old_name != type_new_expr)
 		new_expr = fold_convert (type_old_name, new_expr);

gcc/testsuite/ChangeLog

 2010-08-02  Sebastian Pop  <sebastian.pop@amd.com>
 
+	* gcc.dg/graphite/pr42729.c: New.
+
+2010-08-02  Sebastian Pop  <sebastian.pop@amd.com>
+
 	* gfortran.dg/graphite/id-20.f: New.
 
 2010-08-02  Sebastian Pop  <sebastian.pop@amd.com>

gcc/testsuite/gcc.dg/graphite/pr42729.c

+/* { dg-do compile } */
+/* { dg-options "-O1 -fgraphite-identity -fcompare-debug" } */
+
+int A[10];
+int *foo ()
+{
+  int *p1, *p2, i;
+  for (i = 0; i < 10; i++)
+  {
+    p1 = &A[i];
+    *p1 = 0;
+  }
+  p2 = p1;
+  return p2;
+}