r254777 - in /trunk/gcc: ChangeLog tree-predcom.c

[amker@gcc.gnu.org]

Author: amker
Date: Wed Nov 15 16:16:49 2017
New Revision: 254777

URL: https://gcc.gnu.org/viewcvs?rev=254777&root=gcc&view=rev
Log:
	PR tree-optimization/82726
	Revert
	2017-01-23  Bin Cheng  <bin.cheng@arm.com>

	PR tree-optimization/70754
	* tree-predcom.c (stmt_combining_refs): New parameter INSERT_BEFORE.
	(reassociate_to_the_same_stmt): New parameter INSERT_BEFORE.  Insert
	combined stmt before it if not NULL.
	(combine_chains): Process refs reversely and compute dominance point
	for root ref.

	Revert
	2017-02-23  Bin Cheng  <bin.cheng@arm.com>

	PR tree-optimization/79663
	* tree-predcom.c (combine_chains): Process refs in reverse order
	only for ZERO length chains, and add explaining comment.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/tree-predcom.c