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gcc/gcc ChangeLog Makefile.in c-semantics.c


CVSROOT:	/cvs/gcc
Module name:	gcc
Branch: 	tree-ssa-20020619-branch
Changes by:	law at gcc dot gnu dot org	2003-04-17 20:53:40

Modified files:
	gcc            : ChangeLog Makefile.in c-semantics.c 

Log message:
	Bring over from the mainline:
	
	* c-semantics.c (find_reachable_label): New function to find a
	potentially reachable label in an expression.
	(expand_unreachable_if_stmt): Similar to expand_if_stmt but
	assumes the start of the IF_STMT is unreachable (dead) code.
	(expand_unreachable_stmt): Similar to expand_stmt but assumes
	the start of the statement list is unreachable (dead) code.
	(genrtl_if_stmt):  If the controlling expression of the IF
	is constant, use expand_unreachable_stmt for the THEN or ELSE
	clause as appropriate.
	(genrtl_switch_stmt):  Use expand_unreachable_stmt to expand
	the body of a SWITCH statement.
	(expand_stmt): The code immediately following a "return",
	"break", "continue" or "goto" is unreachable.
	* Makefile.in (c-semantics.o): Depend upon tree-inline.h.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&only_with_tag=tree-ssa-20020619-branch&r1=1.14646.2.53&r2=1.14646.2.54
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/Makefile.in.diff?cvsroot=gcc&only_with_tag=tree-ssa-20020619-branch&r1=1.903.2.85&r2=1.903.2.86
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/c-semantics.c.diff?cvsroot=gcc&only_with_tag=tree-ssa-20020619-branch&r1=1.43.2.9&r2=1.43.2.10


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