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author	Roger Sayle <roger@eyesopen.com>
	Mon, 27 Feb 2006 03:22:18 +0000 (03:22 +0000)
committer	Roger Sayle <sayle@gcc.gnu.org>
	Mon, 27 Feb 2006 03:22:18 +0000 (03:22 +0000)
commit	5881ad5d9dc40dbd97cb7dc4b9d4819c27bdd533
tree	751d572c91141ad30022081f8277b791e0019f07	tree
parent	53f1b560dbbc8485efa92063ef1e953604b40469	commit \| diff

fold-const.c (fold_binary): Fold (~X & C) eq/ne 0 as (X & C) ne/eq 0, where C is a single bit, i.e.

* fold-const.c (fold_binary) <EQ_EXPR>: Fold (~X & C) eq/ne 0 as
(X & C) ne/eq 0, where C is a single bit, i.e. a power of two.
Fold both "((X & C) ^ C) eq/ne 0" and "((X ^ C) & C) eq/ne 0"
as (X & C) ne/eq 0.

* gcc.dg/fold-eqandnot-1.c: New test case.

From-SVN: r111471

gcc/ChangeLog		diff \| blob \| blame \| history
gcc/fold-const.c		diff \| blob \| blame \| history
gcc/testsuite/ChangeLog		diff \| blob \| blame \| history
gcc/testsuite/gcc.dg/fold-eqandnot-1.c	[new file with mode: 0644]	blob

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