r244444 - in /trunk/gcc: ChangeLog testsuite/Ch...

[law@gcc.gnu.org]

Author: law
Date: Fri Jan 13 15:50:11 2017
New Revision: 244444

URL: https://gcc.gnu.org/viewcvs?rev=244444&root=gcc&view=rev
Log:
	* tree-ssa-dse.c (decrement_count): New function.
	(increment_start_addr, maybe_trim_memstar_call): Likewise.
	(dse_dom_walker::optimize_stmt): Call maybe_trim_memstar_call directly
	when we know the partially dead statement is a mem* function.

	* gcc.dg/tree-ssa/ssa-dse-25.c: New test.

Added:
    trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-dse-25.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-dse.c