gcc/gcc ChangeLog.tcb common.opt opts.c tree-i ...

[dnovillo@gcc.gnu.org]

CVSROOT:	/cvs/gcc
Module name:	gcc
Branch: 	tree-cleanup-branch
Changes by:	dnovillo@gcc.gnu.org	2005-02-06 14:14:57

Modified files:
	gcc            : ChangeLog.tcb common.opt opts.c tree-inline.c 
	                 tree-optimize.c tree-pass.h tree-ssa-alias.c 
	                 tree-ssa-ccp.c tree-ssa-dom.c tree-vrp.c 

Log message:
	Value Range Propagation
	
	* Makefile.in (tree-vrp.o): Depend on
	tree-ssa-propagate.h, $(FLAGS_H) and $(TREE_DUMP_H).
	* common.opt (ftree-vrp): Define.
	* opts.c (decode_options): Set flag_tree_vrp at -O2.
	* timevar.def (TV_TREE_INSERT_ASSERT): Remove.
	(TV_TREE_VRP): Define.
	* tree-flow.h (enum value_range_type): Define.
	(struct value_range_def): Define.
	(count_uses_and_derefs): Declare.
	(get_value_range): Declare.
	(dump_value_range): Declare.
	(debug_value_range): Declare.
	(dump_all_value_ranges): Declare.
	(debug_all_value_ranges): Declare.
	* tree-optimize.c (init_tree_optimization_passes): Remove
	pass_insert_range_assertions and pass_remove_range_assertions.
	Add pass_vrp.
	* tree-pass.h (pass_insert_range_assertions): Remove.
	(pass_remove_range_assertions): Remove.
	(pass_vrp): Define.
	* tree-ssa-alias.c (count_ptr_derefs): Make extern.
	* tree.h (SSA_NAME_VALUE_RANGE): Define.
	(struct value_range_def): Forward declare.
	(struct tree_ssa_name): Add field value_range.
	* tree-vrp.c: Include flags.h, tree-dump.h and
	tree-ssa-propagate.h.
	(new_ssa_names): Declare.
	(old_ssa_names): Declare.
	(found): Declare.
	(get_opposite_operand): New.
	(opposite_comparison): New.
	(copy_value_range): New.
	(set_value_range): New.
	(update_value_range): New.
	(get_value_range): New.
	(symbolic_range_p): New.
	(expr_computes_nonnull): New.
	(range_is_nonnull): New.
	(range_is_null): New.
	(set_value_range_to_nonnull): New.
	(set_value_range_to_null): New.
	(compare_values): New.
	(extract_range_from_assert): New.
	(extract_range_from_binary_expr): New.
	(extract_range_from_unary_expr): New.
	(extract_range_from_expr): New.
	(compare_ranges): New.
	(compare_range_with_value): New.
	(value_inside_range): New.
	(value_ranges_intersect_p): New.
	(dump_value_range): New.
	(debug_value_range): New.
	(dump_all_value_ranges): New.
	(debug_all_value_ranges): New.
	
	(build_assert_expr_for): Create a new SSA name for every
	assertion.
	If the conditional is an equality, create a regular
	assignment.
	Push the new name into NEW_SSA_NAMES.  Push the operand into
	OLD_SSA_NAMES.
	(infer_value_range): New.
	(has_assert_expr): New.
	(maybe_add_assert_expr): Add ASSERT_EXPR after pointer
	dereferences.
	Handle cases that require inserting after the last statement
	of a block.
	Call has_assert_expr and infer_value_range.
	(insert_range_assertions): Rename from
	execute_insert_range_assertions.
	Initialize new_ssa_names and old_ssa_names.
	Do not use BB_VISITED to mark visited blocks.
	(pass_insert_range_assertions): Remove.
	(remove_range_assertions): Rename from
	execute_remove_range_assertions.
	(pass_remove_range_assertions): Remove.
	
	(stmt_interesting_for_vrp): New.
	(need_imm_uses_for): New.
	(vrp_initialize): New.
	(vrp_visit_assignment): New.
	(vrp_evaluate_conditional): New.
	(vrp_visit_cond_stmt): New.
	(vrp_visit_stmt): New.
	(vrp_meet): New.
	(vrp_visit_phi_node): New.
	(vrp_finalize): New.
	(execute_vrp): New.
	(gate_vrp): New.
	(pass_vrp): Declare.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.tcb.diff?cvsroot=gcc&only_with_tag=tree-cleanup-branch&r1=1.1.2.20&r2=1.1.2.21
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/common.opt.diff?cvsroot=gcc&only_with_tag=tree-cleanup-branch&r1=1.55.2.8&r2=1.55.2.9
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/opts.c.diff?cvsroot=gcc&only_with_tag=tree-cleanup-branch&r1=1.82.2.8&r2=1.82.2.9
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-inline.c.diff?cvsroot=gcc&only_with_tag=tree-cleanup-branch&r1=1.142.2.11&r2=1.142.2.12
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-optimize.c.diff?cvsroot=gcc&only_with_tag=tree-cleanup-branch&r1=2.47.2.16&r2=2.47.2.17
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-pass.h.diff?cvsroot=gcc&only_with_tag=tree-cleanup-branch&r1=2.15.2.11&r2=2.15.2.12
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-ssa-alias.c.diff?cvsroot=gcc&only_with_tag=tree-cleanup-branch&r1=2.39.2.11&r2=2.39.2.12
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-ssa-ccp.c.diff?cvsroot=gcc&only_with_tag=tree-cleanup-branch&r1=2.41.2.11&r2=2.41.2.12
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-ssa-dom.c.diff?cvsroot=gcc&only_with_tag=tree-cleanup-branch&r1=2.44.2.12&r2=2.44.2.13
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-vrp.c.diff?cvsroot=gcc&only_with_tag=tree-cleanup-branch&r1=1.1.2.2&r2=1.1.2.3