little cleanup

[libfirm] / ir / opt / return.c

diff --git a/ir/opt/return.c b/ir/opt/return.c
index 59530d9..9a71bae 100644 (file)
--- a/ir/opt/return.c
+++ b/ir/opt/return.c
@@ -33,7 +33,7 @@
 /*
  * Normalize the Returns of a graph by creating a new End block
  * with One Return(Phi).
- * This is the prefered input for the if-conversion.
+ * This is the preferred input for the if-conversion.
  *
  * In pseudocode, it means:
  *
@@ -61,6 +61,7 @@ void normalize_one_return(ir_graph *irg)
 
   /* look, if we have more than one return */
   n       = get_Block_n_cfgpreds(endbl);
+  assert(n > 0);
   returns = alloca((n + 7) >> 3);
   memset(returns, 0, (n + 7) >> 3);
 
@@ -169,7 +170,7 @@ static int can_move_ret(ir_node *ret)
 /*
  * Normalize the Returns of a graph by moving
  * the Returns upwards as much as possible.
- * This might be prefered for code generation.
+ * This might be preferred for code generation.
  *
  * In pseudocode, it means:
  *
@@ -312,11 +313,11 @@ void normalize_n_returns(ir_graph *irg)
 
   exchange(endbl, new_r_Block(irg, n_finals, in));
 
-  /* the end block is not automatically skiped, so do it here */
+  /* the end block is not automatically skipped, so do it here */
   set_irg_end_block(irg, skip_Id(get_irg_end_block(irg)));
 
   /* Invalidate analysis information:
-   * Blocks become dead and new Eeturns were deleted, so dominator, outs and loop are inconsistent,
+   * Blocks become dead and new Returns were deleted, so dominator, outs and loop are inconsistent,
    * trouts and callee-state should be still valid
    */
   set_irg_dom_inconsistent(irg);