r262485 - in /trunk/gcc: ChangeLog fold-const.c...

[jakub@gcc.gnu.org]

Author: jakub
Date: Fri Jul  6 21:42:41 2018
New Revision: 262485

URL: https://gcc.gnu.org/viewcvs?rev=262485&root=gcc&view=rev
Log:
	PR tree-optimization/86401
	* fold-const.c (fold_binary_loc) <case BIT_AND_EXPR>: Move the
	((A & N) + B) & M -> (A + B) & M etc. optimization into ...
	(fold_bit_and_mask): ... here.  New helper function for match.pd.
	* fold-const.h (fold_bit_and_mask): Declare.
	* match.pd (((A & N) + B) & M -> (A + B) & M): New optimization.

	* gcc.dg/tree-ssa/pr86401-1.c: New test.
	* gcc.dg/tree-ssa/pr86401-2.c: New test.
	* c-c++-common/rotate-9.c: New test.

Added:
    trunk/gcc/testsuite/c-c++-common/rotate-9.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/pr86401-1.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/pr86401-2.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/fold-const.c
    trunk/gcc/fold-const.h
    trunk/gcc/match.pd
    trunk/gcc/testsuite/ChangeLog