alias.c (component_uses_parent_alias_set): Constify.

	* 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.

From-SVN: r127483

1 files changed, 57 insertions, 0 deletions

diff --git a/gcc/tree-iterator.h b/gcc/tree-iterator.h
index 98f0cf80c49..5b8113a4560 100644
--- a/gcc/tree-iterator.h
+++ b/gcc/tree-iterator.h
@@ -34,6 +34,11 @@ typedef struct {
   tree container;
 } tree_stmt_iterator;
 
+typedef struct {
+  struct tree_statement_list_node *ptr;
+  const_tree container;
+} const_tree_stmt_iterator;
+
 static inline tree_stmt_iterator
 tsi_start (tree t)
 {
@@ -45,6 +50,17 @@ tsi_start (tree t)
   return i;
 }
 
+static inline const_tree_stmt_iterator
+ctsi_start (const_tree t)
+{
+  const_tree_stmt_iterator i;
+
+  i.ptr = STATEMENT_LIST_HEAD (t);
+  i.container = t;
+
+  return i;
+}
+
 static inline tree_stmt_iterator
 tsi_last (tree t)
 {
@@ -56,6 +72,17 @@ tsi_last (tree t)
   return i;
 }
 
+static inline const_tree_stmt_iterator
+ctsi_last (tree t)
+{
+  const_tree_stmt_iterator i;
+
+  i.ptr = STATEMENT_LIST_TAIL (t);
+  i.container = t;
+
+  return i;
+}
+
 static inline bool
 tsi_end_p (tree_stmt_iterator i)
 {
@@ -63,11 +90,23 @@ tsi_end_p (tree_stmt_iterator i)
 }
 
 static inline bool
+ctsi_end_p (const_tree_stmt_iterator i)
+{
+  return i.ptr == NULL;
+}
+
+static inline bool
 tsi_one_before_end_p (tree_stmt_iterator i)
 {
   return i.ptr != NULL && i.ptr->next == NULL;
 }
 
+static inline bool
+ctsi_one_before_end_p (const_tree_stmt_iterator i)
+{
+  return i.ptr != NULL && i.ptr->next == NULL;
+}
+
 static inline void
 tsi_next (tree_stmt_iterator *i)
 {
@@ -75,11 +114,23 @@ tsi_next (tree_stmt_iterator *i)
 }
 
 static inline void
+ctsi_next (const_tree_stmt_iterator *i)
+{
+  i->ptr = i->ptr->next;
+}
+
+static inline void
 tsi_prev (tree_stmt_iterator *i)
 {
   i->ptr = i->ptr->prev;
 }
 
+static inline void
+ctsi_prev (const_tree_stmt_iterator *i)
+{
+  i->ptr = i->ptr->prev;
+}
+
 static inline tree *
 tsi_stmt_ptr (tree_stmt_iterator i)
 {
@@ -92,6 +143,12 @@ tsi_stmt (tree_stmt_iterator i)
   return i.ptr->stmt;
 }
 
+static inline const_tree
+ctsi_stmt (const_tree_stmt_iterator i)
+{
+  return i.ptr->stmt;
+}
+
 enum tsi_iterator_update
 {
   TSI_NEW_STMT,		/* Only valid when single statement is added, move