r256990 - in /trunk/gcc: ChangeLog tree-loop-di...

[amker@gcc.gnu.org]

Author: amker
Date: Tue Jan 23 16:47:03 2018
New Revision: 256990

URL: https://gcc.gnu.org/viewcvs?rev=256990&root=gcc&view=rev
Log:
	PR tree-optimization/82604
	* tree-loop-distribution.c (enum partition_kind): New enum item
	PKIND_PARTIAL_MEMSET.
	(partition_builtin_p): Support above new enum item.
	(generate_code_for_partition): Ditto.
	(compute_access_range): Differentiate cases that equality can be
	proven at all loops, the innermost loops or no loops.
	(classify_builtin_st, classify_builtin_ldst): Adjust call to above
	function.  Set PKIND_PARTIAL_MEMSET for partition appropriately.
	(finalize_partitions, distribute_loop): Don't fuse partition of
	PKIND_PARTIAL_MEMSET kind when distributing 3-level loop nest.
	(prepare_perfect_loop_nest): Distribute 3-level loop nest only if
	parloop is enabled.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/tree-loop-distribution.c