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6849984: Value methods for platform dependent math functions constant fold incorrectly

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Reviewed-by: kvn, twisti
This commit is contained in:
Tom Rodriguez 2010-01-15 11:53:33 -08:00
parent 8214fc3a3b
commit 72d0f638c7
11 changed files with 248 additions and 24 deletions
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12
hotspot/src/share/vm/runtime/compilationPolicy.cpp
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@ -1,5 +1,5 @@
/*
* Copyright 2000-2007 Sun Microsystems, Inc. All Rights Reserved.
* Copyright 2000-2010 Sun Microsystems, Inc. All Rights Reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
@ -74,6 +74,16 @@ bool CompilationPolicy::canBeCompiled(methodHandle m) {
if (m->is_abstract()) return false;
if (DontCompileHugeMethods && m->code_size() > HugeMethodLimit) return false;
// Math intrinsics should never be compiled as this can lead to
// monotonicity problems because the interpreter will prefer the
// compiled code to the intrinsic version. This can't happen in
// production because the invocation counter can't be incremented
// but we shouldn't expose the system to this problem in testing
// modes.
if (!AbstractInterpreter::can_be_compiled(m)) {
return false;
}
return !m->is_not_compilable();
}