6705887: Compressed Oops: generate x64 addressing and implicit null checks with narrow oops
Summary: Generate addresses and implicit null checks with narrow oops to avoid decoding.
Reviewed-by: jrose, never
/*
* Copyright 1999-2007 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
* 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
* CA 95054 USA or visit www.sun.com if you need additional information or
* have any questions.
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*/
class C2Compiler : public AbstractCompiler {
private:
static void initialize_runtime();
public:
// Name
const char *name() { return "C2"; }
static volatile int _runtimes;
#ifdef TIERED
virtual bool is_c2() { return true; };
#endif // TIERED
// Customization
bool needs_adapters () { return true; }
bool needs_stubs () { return true; }
void initialize();
// Compilation entry point for methods
void compile_method(ciEnv* env,
ciMethod* target,
int entry_bci);
// sentinel value used to trigger backtracking in compile_method().
static const char* retry_no_subsuming_loads();
static const char* retry_no_escape_analysis();
// Print compilation timers and statistics
void print_timers();
};