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author	Roger Sayle <roger@eyesopen.com>
	Mon, 6 May 2002 22:59:38 +0000 (22:59 +0000)
committer	Roger Sayle <sayle@gcc.gnu.org>
	Mon, 6 May 2002 22:59:38 +0000 (22:59 +0000)
commit	1f77b5da981dae69e8e8d7ea3dc60ba95150c267
tree	42a44a69dbd2f8b714055533a4e34ddf161eabd9	tree
parent	a5a49440f74e957e418360804bf270a8ebc9ad8e	commit \| diff

re PR rtl-optimization/3995 (i386 optimisation: joining tests)

PR opt/3995
* fold-const.c (sign_bit_p): New function.
(fold) [EQ_EXPR]: Use this to convert (A & C) == 0 into A >= 0 and
(A & C) != 0 into A < 0, when constant C is the sign bit of A's type.
Reapply fold when converting (A & C) == C into (A & C) != 0.
(fold_binary_op_with_conditional_arg): Fix typo in comment.

testsuite/
* gcc.c-torture/execute/20020506-1.c: New test case.

From-SVN: r53241

gcc/ChangeLog		diff \| blob \| blame \| history
gcc/fold-const.c		diff \| blob \| blame \| history
gcc/testsuite/ChangeLog		diff \| blob \| blame \| history
gcc/testsuite/gcc.c-torture/execute/20020506-1.c	[new file with mode: 0644]	blob

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