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/*
* Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.
* Copyright 2009 Red Hat, Inc.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*
*/
#include "precompiled.hpp"
#include "ci/ciInstance.hpp"
#include "ci/ciStreams.hpp"
#include "shark/sharkBuilder.hpp"
#include "shark/sharkConstant.hpp"
#include "shark/sharkValue.hpp"
using namespace llvm;
SharkConstant* SharkConstant::for_ldc(ciBytecodeStream *iter) {
ciConstant constant = iter->get_constant();
ciType *type = NULL;
if (constant.basic_type() == T_OBJECT) {
ciEnv *env = ciEnv::current();
if (constant.as_object()->is_klass())
type = env->Class_klass();
else
type = env->String_klass();
}
return new SharkConstant(constant, type);
}
SharkConstant* SharkConstant::for_field(ciBytecodeStream *iter) {
bool will_link;
ciField *field = iter->get_field(will_link);
assert(will_link, "typeflow responsibility");
return new SharkConstant(field->constant_value(), field->type());
}
SharkConstant::SharkConstant(ciConstant constant, ciType *type) {
SharkValue *value = NULL;
switch (constant.basic_type()) {
case T_BOOLEAN:
case T_BYTE:
case T_CHAR:
case T_SHORT:
case T_INT:
value = SharkValue::jint_constant(constant.as_int());
break;
case T_LONG:
value = SharkValue::jlong_constant(constant.as_long());
break;
case T_FLOAT:
value = SharkValue::jfloat_constant(constant.as_float());
break;
case T_DOUBLE:
value = SharkValue::jdouble_constant(constant.as_double());
break;
case T_OBJECT:
case T_ARRAY:
break;
case T_ILLEGAL:
// out of memory
_is_loaded = false;
return;
default:
tty->print_cr("Unhandled type %s", type2name(constant.basic_type()));
ShouldNotReachHere();
}
// Handle primitive types. We create SharkValues for these
// now; doing so doesn't emit any code, and it allows us to
// delegate a bunch of stuff to the SharkValue code.
if (value) {
_value = value;
_is_loaded = true;
_is_nonzero = value->zero_checked();
_is_two_word = value->is_two_word();
return;
}
// Handle reference types. This is tricky because some
// ciObjects are psuedo-objects that refer to oops which
// have yet to be created. We need to spot the unloaded
// objects (which differ between ldc* and get*, thanks!)
ciObject *object = constant.as_object();
assert(type != NULL, "shouldn't be");
if (object->is_klass()) {
// The constant returned for a klass is the ciKlass
// for the entry, but we want the java_mirror.
ciKlass *klass = object->as_klass();
if (!klass->is_loaded()) {
_is_loaded = false;
return;
}
object = klass->java_mirror();
}
if (object->is_null_object() || !object->can_be_constant()) {
_is_loaded = false;
return;
}
_value = NULL;
_object = object;
_type = type;
_is_loaded = true;
_is_nonzero = true;
_is_two_word = false;
}
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