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

[dnovillo@gcc.gnu.org]

CVSROOT:	/cvs/gcc
Module name:	gcc
Branch: 	tree-ssa-20020619-branch
Changes by:	dnovillo@gcc.gnu.org	2003-02-10 12:27:04

Modified files:
	gcc            : ChangeLog.tree-ssa tree-dfa.c tree-ssa-dce.c 
	                 tree-ssa.c tree.h 

Log message:
	* tree-dfa.c (find_vars_r): Assume that the RHS of an INDIRECT_REF,
	that is also an SSA variable, is a VAR_DECL.
	(get_virtual_var): Handle INDIRECT_REF nodes that are not valid SSA
	variables.
	
	* tree-ssa-dce.c (stmt_useful_p): Revert kludge in previous commit.
	VA_ARG_EXPR nodes are not inherently live.
	
	* tree-ssa.c (mark_def_sites): Don't process the LHS of assignments
	twice.
	The operand of a virtual definition constitutes a use of the
	variable which should be considered a non-local if it had not been
	killed inside the block.
	
	* tree.h (SSA_VAR_P): Only return true for INDIRECT_REFs if their
	operand is a _DECL node.

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=1.1.2.222&r2=1.1.2.223
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-dfa.c.diff?cvsroot=gcc&only_with_tag=tree-ssa-20020619-branch&r1=1.1.4.75&r2=1.1.4.76
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=1.1.2.26&r2=1.1.2.27
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-ssa.c.diff?cvsroot=gcc&only_with_tag=tree-ssa-20020619-branch&r1=1.1.4.50&r2=1.1.4.51
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree.h.diff?cvsroot=gcc&only_with_tag=tree-ssa-20020619-branch&r1=1.342.2.44&r2=1.342.2.45