gcc/gcc ChangeLog.tree-ssa toplev.c tree-dfa.c ...

[dnovillo@gcc.gnu.org]

CVSROOT:	/cvs/gcc
Module name:	gcc
Branch: 	tree-ssa-20020619-branch
Changes by:	dnovillo@gcc.gnu.org	2003-02-09 04:45:19

Modified files:
	gcc            : ChangeLog.tree-ssa toplev.c tree-dfa.c 
	                 tree-flow-inline.h tree-flow.h tree-ssa-dce.c 
	                 tree-ssa.c 
	gcc/testsuite  : ChangeLog.tree-ssa 
	gcc/testsuite/lib: c-torture.exp 

Log message:
	* toplev.c (parse_options_and_default_flags): Enable SSA DCE by
	default.
	
	* tree-dfa.c (get_expr_operands): Recurse into LHS of an ARRAY_REF
	when it's not a regular variable.  Always recurse into the RHS.
	(add_stmt_operand): Set may_point_to_global_mem for pointers that
	are assigned expressions that may reference global memory.  Also
	set its dereference variable to be an alias of global memory.
	(dump_variable): Show may_point_to_global_mem flag.
	(compute_alias_sets): Also dump all referenced variables when
	dumping alias information.
	(add_may_alias): Check for global memory aliasing.
	(may_access_global_mem_p): Rename from may_access_global_mem.
	Return true if the expression is a variable that may point to or
	alias global memory.
	(add_referenced_var): Pointer arguments and global pointers may
	point to global memory.
	(set_may_alias_global_mem): Move ...
	* tree-flow-inline.h (set_may_alias_global_mem): ... here.
	(set_may_point_to_global_mem): New function.
	(may_point_to_global_mem_p): New function.
	
	* tree-ssa-dce.c (stmt_useful_p): VA_ARG_EXPRs are inherently live.
	* tree-ssa.c (rewrite_into_ssa): Don't call dump_referenced_vars.
	
	testsuite/ChangeLog.tree-ssa:
	
	* lib/c-torture.exp: Remove -ftree-dce from compiler flags.

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=1.1.2.220&r2=1.1.2.221
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/toplev.c.diff?cvsroot=gcc&only_with_tag=tree-ssa-20020619-branch&r1=1.654.2.41&r2=1.654.2.42
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-dfa.c.diff?cvsroot=gcc&only_with_tag=tree-ssa-20020619-branch&r1=1.1.4.74&r2=1.1.4.75
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=1.1.2.25&r2=1.1.2.26
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-flow.h.diff?cvsroot=gcc&only_with_tag=tree-ssa-20020619-branch&r1=1.1.4.53&r2=1.1.4.54
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=1.1.2.25&r2=1.1.2.26
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-ssa.c.diff?cvsroot=gcc&only_with_tag=tree-ssa-20020619-branch&r1=1.1.4.49&r2=1.1.4.50
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/ChangeLog.tree-ssa.diff?cvsroot=gcc&only_with_tag=tree-ssa-20020619-branch&r1=1.1.2.8&r2=1.1.2.9
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/lib/c-torture.exp.diff?cvsroot=gcc&only_with_tag=tree-ssa-20020619-branch&r1=1.17.2.1&r2=1.17.2.2