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/*
* Copyright (c) 1999, 2011, Oracle and/or its affiliates. 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 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 "opto/c2compiler.hpp"
#include "opto/runtime.hpp"
#ifdef TARGET_ARCH_MODEL_x86_32
# include "adfiles/ad_x86_32.hpp"
#endif
#ifdef TARGET_ARCH_MODEL_x86_64
# include "adfiles/ad_x86_64.hpp"
#endif
#ifdef TARGET_ARCH_MODEL_sparc
# include "adfiles/ad_sparc.hpp"
#endif
#ifdef TARGET_ARCH_MODEL_zero
# include "adfiles/ad_zero.hpp"
#endif
#ifdef TARGET_ARCH_MODEL_arm
# include "adfiles/ad_arm.hpp"
#endif
#ifdef TARGET_ARCH_MODEL_ppc
# include "adfiles/ad_ppc.hpp"
#endif
// register information defined by ADLC
extern const char register_save_policy[];
extern const int register_save_type[];
const char* C2Compiler::retry_no_subsuming_loads() {
return "retry without subsuming loads";
}
const char* C2Compiler::retry_no_escape_analysis() {
return "retry without escape analysis";
}
bool C2Compiler::init_c2_runtime() {
// Check assumptions used while running ADLC
Compile::adlc_verification();
assert(REG_COUNT <= ConcreteRegisterImpl::number_of_registers, "incompatible register counts");
for (int i = 0; i < ConcreteRegisterImpl::number_of_registers ; i++ ) {
OptoReg::vm2opto[i] = OptoReg::Bad;
}
for( OptoReg::Name i=OptoReg::Name(0); i<OptoReg::Name(REG_COUNT); i = OptoReg::add(i,1) ) {
VMReg r = OptoReg::as_VMReg(i);
if (r->is_valid()) {
OptoReg::vm2opto[r->value()] = i;
}
}
// Check that runtime and architecture description agree on callee-saved-floats
bool callee_saved_floats = false;
for( OptoReg::Name i=OptoReg::Name(0); i<OptoReg::Name(_last_Mach_Reg); i = OptoReg::add(i,1) ) {
// Is there a callee-saved float or double?
if( register_save_policy[i] == 'E' /* callee-saved */ &&
(register_save_type[i] == Op_RegF || register_save_type[i] == Op_RegD) ) {
callee_saved_floats = true;
}
}
DEBUG_ONLY( Node::init_NodeProperty(); )
Compile::pd_compiler2_init();
CompilerThread* thread = CompilerThread::current();
HandleMark handle_mark(thread);
return OptoRuntime::generate(thread->env());
}
void C2Compiler::initialize() {
// The first compiler thread that gets here will initialize the
// small amount of global state (and runtime stubs) that C2 needs.
// There is a race possible once at startup and then we're fine
// Note that this is being called from a compiler thread not the
// main startup thread.
if (should_perform_init()) {
bool successful = C2Compiler::init_c2_runtime();
int new_state = (successful) ? initialized : failed;
set_state(new_state);
}
}
void C2Compiler::compile_method(ciEnv* env, ciMethod* target, int entry_bci) {
assert(is_initialized(), "Compiler thread must be initialized");
bool subsume_loads = SubsumeLoads;
bool do_escape_analysis = DoEscapeAnalysis && !env->jvmti_can_access_local_variables();
bool eliminate_boxing = EliminateAutoBox;
while (!env->failing()) {
// Attempt to compile while subsuming loads into machine instructions.
Compile C(env, this, target, entry_bci, subsume_loads, do_escape_analysis, eliminate_boxing);
// Check result and retry if appropriate.
if (C.failure_reason() != NULL) {
if (C.failure_reason_is(retry_no_subsuming_loads())) {
assert(subsume_loads, "must make progress");
subsume_loads = false;
continue; // retry
}
if (C.failure_reason_is(retry_no_escape_analysis())) {
assert(do_escape_analysis, "must make progress");
do_escape_analysis = false;
continue; // retry
}
if (C.has_boxed_value()) {
// Recompile without boxing elimination regardless failure reason.
assert(eliminate_boxing, "must make progress");
eliminate_boxing = false;
continue; // retry
}
// Pass any other failure reason up to the ciEnv.
// Note that serious, irreversible failures are already logged
// on the ciEnv via env->record_method_not_compilable().
env->record_failure(C.failure_reason());
}
if (StressRecompilation) {
if (subsume_loads) {
subsume_loads = false;
continue; // retry
}
if (do_escape_analysis) {
do_escape_analysis = false;
continue; // retry
}
}
// No retry; just break the loop.
break;
}
}
void C2Compiler::print_timers() {
// do nothing
}
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