[patch] Store motion rewrite

[Eric Botcazou]

> Changelog:
> 	* gcse.c (remove_reachable_equiv_notes): New.
> 	replace_store_insn): Call it.  Update antic list.
> 	(store_killed_in_insn): Take REG_EQUAL notes into account.
> 	(build_store_vectors, delete_store): Add parameter to
> 	replace_store_insn call.

This patch is not sufficient to fix the regression on sparc-sun-solaris2.9.

-- 
Eric Botcazou