re PR rtl-optimization/57425 (RTL alias analysis unprepared to handle stack slot...

re PR rtl-optimization/57425 (RTL alias analysis unprepared to handle stack slot sharing)

gcc:
	PR rtl-optimization/57425
	PR rtl-optimization/57569
	* alias.c (write_dependence_p): Add new parameters mem_size,
	canon_mem_addr and mem_canonicalized.  Change type of writep to bool.
	Changed all callers.
	(canon_anti_dependence): New function.
	* cse.c (check_dependence): Use canon_anti_dependence.
	* cselib.c (cselib_invalidate_mem): Likewise.
	* rtl.h (canon_anti_dependence): Declare.
gcc/testsuite:
	PR rtl-optimization/57425
	PR rtl-optimization/57569
	* gcc.dg/torture/pr57425-1.c, gcc.dg/torture/pr57425-2.c: New files.
	* gcc.dg/torture/pr57425-3.c, gcc.dg/torture/pr57569.c: Likewise.
Index: alias.c
===================================================================
--- alias.c	(revision 200126)

From-SVN: r200133