r171090 - in /trunk/gcc: ChangeLog Makefile.in ...

[jakub@gcc.gnu.org]

Author: jakub
Date: Thu Mar 17 12:36:04 2011
New Revision: 171090

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=171090
Log:
	PR rtl-optimization/48141
	* params.def (PARAM_MAX_DSE_ACTIVE_LOCAL_STORES): New.
	* dse.c: Include params.h.
	(active_local_stores_len): New variable.
	(add_wild_read, dse_step1): Clear it when setting active_local_stores
	to NULL.
	(record_store, check_mem_read_rtx): Decrease it when removing
	from the chain.
	(scan_insn): Likewise.  Increase it when adding to chain, if it
	reaches PARAM_MAX_DSE_ACTIVE_LOCAL_STORES limit, set to 1 and
	set active_local_stores to NULL before the addition.
	* Makefile.in (dse.o): Depend on $(PARAMS_H).

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/Makefile.in
    trunk/gcc/dse.c
    trunk/gcc/params.def