gcc/gcc ChangeLog Makefile.in tree-chrec.c tre ...

[spop@gcc.gnu.org]

CVSROOT:	/cvs/gcc
Module name:	gcc
Changes by:	spop@gcc.gnu.org	2005-09-09 10:56:43

Modified files:
	gcc            : ChangeLog Makefile.in tree-chrec.c 
	                 tree-scalar-evolution.c tree-ssa-loop-niter.c 

Log message:
	* Makefile.in (tree-chrec.o): Depends on SCEV_H.
	* tree-chrec.c: Include tree-scalar-evolution.h.
	(chrec_convert): Instantiate the base and step before calling
	scev_probably_wraps_p that would fail on parametric evolutions.
	Collect all the fails into a single section failed_to_convert,
	print a diagnostic, and return chrec_dont_know instead of calling
	fold_convert.
	* tree-scalar-evolution.c (loop_closed_phi_def): New.
	(instantiate_parameters_1): Avoid instantiation of loop closed ssa
	phi nodes.
	(scev_const_prop): Don't replace the definition of a loop closed ssa
	phi node by itself, or by another loop closed ssa phi node.
	* tree-ssa-loop-niter.c (scev_probably_wraps_p, convert_step): Check
	that base and step are defined.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&r1=2.9924&r2=2.9925
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/Makefile.in.diff?cvsroot=gcc&r1=1.1538&r2=1.1539
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-chrec.c.diff?cvsroot=gcc&r1=2.25&r2=2.26
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-scalar-evolution.c.diff?cvsroot=gcc&r1=2.36&r2=2.37
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-ssa-loop-niter.c.diff?cvsroot=gcc&r1=2.41&r2=2.42