31 lines
1.5 KiB
Plaintext
31 lines
1.5 KiB
Plaintext
Copyright (c) 2002, 2018, Oracle and/or its affiliates. All rights reserved.
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DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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This code is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License version 2 only, as
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published by the Free Software Foundation.
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This code is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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version 2 for more details (a copy is included in the LICENSE file that
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accompanied this code).
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You should have received a copy of the GNU General Public License version
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2 along with this work; if not, write to the Free Software Foundation,
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Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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or visit www.oracle.com if you need additional information or have any
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questions.
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LOOP INVARIANT COMPUTATIONS
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Loop-invariant is any part of a computation within a loop that does not depend
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on the loop variables and whose value does not change as long as control stays
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within the loop. Loop-invarians assignments may be moved out of the loop
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entirely. There may be some situations where you know the value won't vary, but
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the compiler is playing it safe in case of side-effects. "Computation" here
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doesn't mean just arithmetic; array indexing, calls to pure functions are all
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possible candidates for moving out of the loop.
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