gcc/gcc ChangeLog Makefile.in basic-block.h cf ...

[amylaar@gcc.gnu.org]

CVSROOT:	/cvs/gcc
Module name:	gcc
Changes by:	amylaar@gcc.gnu.org	2004-06-14 12:09:11

Modified files:
	gcc            : ChangeLog Makefile.in basic-block.h cfganal.c 
	                 cfgbuild.c cfglayout.c cfgrtl.c function.c 

Log message:
	* basic-block.h (could_fall_through): Declare.
	* cfganal.c (can_fallthru): Succeed if the target is EXIT_BLOCK_PTR.
	Fail if the source already has a fallthrough edge to the exit
	block pointer.
	(could_fall_through): New function.
	* cfgbuild.c (make_edges): Check if we already have a fallthrough
	edge to the exit block pointer.
	* cfglayout.c (fixup_fallthru_exit_predecessor): Check that it is
	not called before reload has completed.
	Handle special case of first block having a fall-through exit edge.
	(cfg_layout_finalize): Don't call it before reload or if we have
	rtl epilogues.
	(fixup_reorder_chain): A fall through to the exit block does not
	require the block to come last.  Add sanity checks.
	* cfgrtl.c (rtl_split_edge): Add special handling of fall through
	edges to the exit block.
	* function.c (cfglayout.h): #include.
	(thread_prologue_and_epilogue_insns): If we have neither return nor
	epilogue, but a fall through to the exit block from mid-function,
	force a non-fall-through exit.
	* Makefile.in (function.o): Depend on CFGLAYOUT_H.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&r1=2.3955&r2=2.3956
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/Makefile.in.diff?cvsroot=gcc&r1=1.1296&r2=1.1297
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/basic-block.h.diff?cvsroot=gcc&r1=1.198&r2=1.199
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cfganal.c.diff?cvsroot=gcc&r1=1.42&r2=1.43
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cfgbuild.c.diff?cvsroot=gcc&r1=1.47&r2=1.48
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cfglayout.c.diff?cvsroot=gcc&r1=1.59&r2=1.60
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cfgrtl.c.diff?cvsroot=gcc&r1=1.120&r2=1.121
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/function.c.diff?cvsroot=gcc&r1=1.521&r2=1.522