gcc/gcc ChangeLog.tree-ssa gimplify.c tree-cfg ...

[amacleod@gcc.gnu.org]

CVSROOT:	/cvs/gcc
Module name:	gcc
Branch: 	tree-ssa-20020619-branch
Changes by:	amacleod@gcc.gnu.org	2002-12-02 12:42:51

Modified files:
	gcc            : ChangeLog.tree-ssa gimplify.c tree-cfg.c 
	                 tree-dfa.c tree-flow-inline.h tree-flow.h 
	                 tree-simple.h tree-ssa-ccp.c tree-ssa-dce.c 
	                 tree-ssa-pre.c 

Log message:
	* gimplify.c (simplify_cleanup_point_expr): gsi_stmt can return NULL,
	use gsi_end.
	* tree-cfg.c (make_blocks): Use gsi_end, gsi_stmt can return NULL. Set
	basic_block for empty_stmt_node containers.
	(make_edges): Stmt's can be NULL.
	(make_ctrl_stmt_edges, make_exit_edges, make_loop_expr_edges,
	make_cond_expr_edges, make_goto_expr_edges, is_nonlocal_label_block,
	block_invalidates_loop, cleanup_control_flow, cleanup_cond_expr_graph,
	cleanup_switch_expr_graph, disconnect_unreachable_case_labels,
	find_taken_edge, tree_cfg2dot, successor_block, is_latch_block,
	switch_parent, first_stmt, last_stmt): Check for first_stmt() or
	last_stmt() returning NULL.
	(remove_tree_bb, first_exec_stmt): Use gsi_end.
	(last_stmt_ptr): Iterate to find last execuatbel stmt_ptr in a block.
	(gsi_start_bb): Return first non-empty stmt, if there is one.
	(set_bb_for_stmt): Don't decend into an empty_stmt_node.
	* tree-dfa.c (find_tree_refs): Use gsi_end.
	(collect_dfa_stats): Use gsi_end_bb.
	* tree-flow-inline.h (gsi_step_bb): split.
	(gsi_step_in_bb): gsi_step with explicit bb specified. Never return
	empty_stmt_node.
	(gsi_start_bb): Move to tree-cfg.c.
	(gsi_end_bb): New. Have we reached the end of a basic block.
	* tree-flow.h (gsi_start_bb): Make external.
	(gsi_end_bb, gsi_step_in_bb): New prototypes.
	* tree-simple.h (gsi_end): renamed from gsi_after_end.
	(gsi_stmt): Return NULL if stmt is an empty_stmt_node or error mark.
	* tree-ssa-ccp.c (simulate_block, substitute_and_fold): Use gsi_end.
	* tree-ssa-dce.c (mark_control_parent_necessary, find_useful_stmts,
	remove_dead_stmts): Use gsi_end_bb.
	(process_worklist): Check for NULL last_stmt.
	* tree-ssa-pre.c (finalize_1): Use gsi_end_bb, gsi_stmt can be NULL.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.tree-ssa.diff?cvsroot=gcc&only_with_tag=tree-ssa-20020619-branch&r1=1.1.2.139&r2=1.1.2.140
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/gimplify.c.diff?cvsroot=gcc&only_with_tag=tree-ssa-20020619-branch&r1=1.1.2.10&r2=1.1.2.11
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-cfg.c.diff?cvsroot=gcc&only_with_tag=tree-ssa-20020619-branch&r1=1.1.4.34&r2=1.1.4.35
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-dfa.c.diff?cvsroot=gcc&only_with_tag=tree-ssa-20020619-branch&r1=1.1.4.53&r2=1.1.4.54
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-flow-inline.h.diff?cvsroot=gcc&only_with_tag=tree-ssa-20020619-branch&r1=1.1.2.15&r2=1.1.2.16
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-flow.h.diff?cvsroot=gcc&only_with_tag=tree-ssa-20020619-branch&r1=1.1.4.38&r2=1.1.4.39
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-simple.h.diff?cvsroot=gcc&only_with_tag=tree-ssa-20020619-branch&r1=1.1.4.16&r2=1.1.4.17
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-ssa-ccp.c.diff?cvsroot=gcc&only_with_tag=tree-ssa-20020619-branch&r1=1.1.2.35&r2=1.1.2.36
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-ssa-dce.c.diff?cvsroot=gcc&only_with_tag=tree-ssa-20020619-branch&r1=1.1.2.15&r2=1.1.2.16
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-ssa-pre.c.diff?cvsroot=gcc&only_with_tag=tree-ssa-20020619-branch&r1=1.1.4.38&r2=1.1.4.39