Fix PR bootstrap/13853

[Eric Botcazou]

This patch

2004-01-18  Jan Hubicka  <jh@suse.cz>

	* basic-block.h (try_redirect_by_replacing_jump): Declare.
	* cfgcleanup.c (try_optimize_cfg): Use it.
	* cfgrtl.c (try_redirect_by_replacing_jump): Export.
	(rtl_redirect_edge_and_branch, cfg_layout_redirect_edge_and_branch):
	Kill hack.
	(cfg_layout_merge_blocks): Use try_redirect_by_replacing_jump.

causes the stage1 compiler to be miscompiled by GNAT 3.1x and probably other 
relatively old compilers.  The problem pertains to the use of 'bool'.

Fixed by the attached patch.  Bootstrapped on i586-redhat-linux-gnu 
(3.4 branch, c and ada), applied to mainline and 3.4 branch as obvious.


2004-01-25  Eric Botcazou  <ebotcazou@act-europe.fr>

	PR bootstrap/13853
	* cfgcleanup.c (try_optimize_cfg): Explicitly test against 0.


-- 
Eric Botcazou
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