* alias.c (component_uses_parent_alias_set): Constify.

	* alias.h (component_uses_parent_alias_set): Likewise.
	* cfgrtl.c (print_rtl_with_bb): Likewise.
	* double-int.c (tree_to_double_int, double_int_fits_to_tree_p,
	mpz_get_double_int): Likewise.
	* double-int.h (double_int_fits_to_tree_p, tree_to_double_int,
	mpz_get_double_int): Likewise.
	* expr.c (is_aligning_offset, undefined_operand_subword_p,
	mostly_zeros_p, all_zeros_p, safe_from_p, is_aligning_offset):
	Likewise.
	* expr.h (safe_from_p): Likewise.
	* gimple-low.c (try_catch_may_fallthru, block_may_fallthru):
	Likewise.
	* gimplify.c (should_carry_locus_p, zero_sized_field_decl,
	zero_sized_type, goa_lhs_expr_p): Likewise.
	* omp-low.c (is_variable_sized, use_pointer_for_field): Likewise.
	* rtl.h (print_rtl_with_bb): Likewise.
	* sched-vis.c (print_exp, print_value, print_pattern): Likewise.
	* tree-cfg.c (const_first_stmt, const_last_stmt): New.
	* tree-flow-inline.h (bb_stmt_list): Constify.
	(cbsi_start, cbsi_last, cbsi_end_p, cbsi_next, cbsi_prev,
	cbsi_stmt): New.
	* tree-flow.h (const_block_stmt_iterator, cbsi_start, cbsi_last,
	const_first_stmt, const_last_stmt): New.
	(block_may_fallthru, empty_block_p): Constify.
	* tree-iterator.c (EXPR_FIRST_BODY, EXPR_LAST_BODY,
	EXPR_ONLY_BODY): New.
	(expr_first, expr_last, expr_only): Use macro for body.
	(const_expr_first, const_expr_last, const_expr_only): New.
	* tree-iterator.h (const_tree_stmt_iterator, ctsi_start,
	ctsi_last, ctsi_end_p, ctsi_one_before_end_p, ctsi_next,
	ctsi_prev, ctsi_stmt): New.
	* tree-scalar-evolution.c (get_loop_exit_condition): Constify.
	* tree-scalar-evolution.h (get_loop_exit_condition): Likewise.
	* tree-ssa-loop-niter.c (loop_only_exit_p,
	derive_constant_upper_bound): Likewise.
	* tree-ssa-phiopt.c (empty_block_p): Likewise.
	* tree-ssa-threadupdate.c (redirection_block_p): Likewise.
	* tree-vectorizer.c (slpeel_can_duplicate_loop_p): Likewise.
	* tree-vectorizer.h (slpeel_can_duplicate_loop_p): Likewise.
	* tree-vrp.c (vrp_bitmap_equal_p): Likewise.
	* tree.c (get_type_static_bounds): Likewise.
	* tree.h (const_expr_first, const_expr_last, const_expr_only): New.
	(get_type_static_bounds): Constify.



git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@127483 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 12 insertions, 12 deletions

diff --git a/gcc/tree-ssa-threadupdate.c b/gcc/tree-ssa-threadupdate.c
index 1d5500fe018..d4d9ee53788 100644
--- a/gcc/tree-ssa-threadupdate.c
+++ b/gcc/tree-ssa-threadupdate.c
@@ -461,26 +461,26 @@ redirect_edges (void **slot, void *data)
    is one, this is equivalent to a "forwarder" block.  */
 
 static bool
-redirection_block_p (basic_block bb)
+redirection_block_p (const_basic_block bb)
 {
-  block_stmt_iterator bsi;
+  const_block_stmt_iterator bsi;
 
   /* Advance to the first executable statement.  */
-  bsi = bsi_start (bb);
-  while (!bsi_end_p (bsi)
-          && (TREE_CODE (bsi_stmt (bsi)) == LABEL_EXPR
-              || IS_EMPTY_STMT (bsi_stmt (bsi))))
-    bsi_next (&bsi);
+  bsi = cbsi_start (bb);
+  while (!cbsi_end_p (bsi)
+          && (TREE_CODE (cbsi_stmt (bsi)) == LABEL_EXPR
+              || IS_EMPTY_STMT (cbsi_stmt (bsi))))
+    cbsi_next (&bsi);
 
   /* Check if this is an empty block.  */
-  if (bsi_end_p (bsi))
+  if (cbsi_end_p (bsi))
     return true;
 
   /* Test that we've reached the terminating control statement.  */
-  return bsi_stmt (bsi)
-	 && (TREE_CODE (bsi_stmt (bsi)) == COND_EXPR
-	     || TREE_CODE (bsi_stmt (bsi)) == GOTO_EXPR
-	     || TREE_CODE (bsi_stmt (bsi)) == SWITCH_EXPR);
+  return cbsi_stmt (bsi)
+	 && (TREE_CODE (cbsi_stmt (bsi)) == COND_EXPR
+	     || TREE_CODE (cbsi_stmt (bsi)) == GOTO_EXPR
+	     || TREE_CODE (cbsi_stmt (bsi)) == SWITCH_EXPR);
 }
 
 /* BB is a block which ends with a COND_EXPR or SWITCH_EXPR and when BB