tree.c (nreverse): Assert that we don't have a BLOCK.

gcc/
	* tree.c (nreverse): Assert that we don't have a BLOCK.

gcc/ada/
	* gcc-interface/utils.c (gnat_poplevel): Use blocks_nreverse.

From-SVN: r163036

gcc/ChangeLog

 2010-08-09  Nathan Froyd  <froydnj@codesourcery.com>
 
+	* tree.c (nreverse): Assert that we don't have a BLOCK.
+
+2010-08-09  Nathan Froyd  <froydnj@codesourcery.com>
+
 	* builtins.c (fold_builtin_next_arg): Use stdarg_p.
 	* config/arm/arm.c (arm_get_pcs_model): Likewise.
 	* config/avr/avr.c (init_cumulative_args): Likewise.

gcc/ada/ChangeLog

+2010-08-09  Nathan Froyd  <froydnj@codesourcery.com>
+
+	* gcc-interface/utils.c (gnat_poplevel): Use blocks_nreverse.
+
 2010-08-09  Eric Botcazou  <ebotcazou@adacore.com>
 
 	* gcc-interface/utils.c (build_vms_descriptor32): Fix formatting.

gcc/ada/gcc-interface/utils.c

@@ -382,7 +382,7 @@ gnat_poplevel (void)
   tree block = level->block;
 
   BLOCK_VARS (block) = nreverse (BLOCK_VARS (block));
-  BLOCK_SUBBLOCKS (block) = nreverse (BLOCK_SUBBLOCKS (block));
+  BLOCK_SUBBLOCKS (block) = blocks_nreverse (BLOCK_SUBBLOCKS (block));
 
   /* If this is a function-level BLOCK don't do anything.  Otherwise, if there
      are no variables free the block and merge its subblocks into those of its

gcc/tree.c

@@ -2108,6 +2108,9 @@ nreverse (tree t)
   tree prev = 0, decl, next;
   for (decl = t; decl; decl = next)
     {
+      /* We shouldn't be using this function to reverse BLOCK chains; we
+	 have blocks_nreverse for that.  */
+      gcc_checking_assert (TREE_CODE (decl) != BLOCK);
       next = TREE_CHAIN (decl);
       TREE_CHAIN (decl) = prev;
       prev = decl;