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src/share/vm/opto/c2compiler.cpp@fd13a567f179 (annotated)

src/share/vm/opto/c2compiler.cpp

Thu, 24 May 2018 19:26:50 +0800

author

aoqi

date

Thu, 24 May 2018 19:26:50 +0800

changeset 8862

fd13a567f179

parent 8604

04d83ba48607

child 10015

eb7ce841ccec

permissions

-rw-r--r--

#7046 C2 supports long branch
Contributed-by: fujie

aoqi@0	1	/*
dlong@7598	2	* Copyright (c) 1999, 2015, Oracle and/or its affiliates. All rights reserved.
aoqi@0	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0	4	*
aoqi@0	5	* This code is free software; you can redistribute it and/or modify it
aoqi@0	6	* under the terms of the GNU General Public License version 2 only, as
aoqi@0	7	* published by the Free Software Foundation.
aoqi@0	8	*
aoqi@0	9	* This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
aoqi@0	12	* version 2 for more details (a copy is included in the LICENSE file that
aoqi@0	13	* accompanied this code).
aoqi@0	14	*
aoqi@0	15	* You should have received a copy of the GNU General Public License version
aoqi@0	16	* 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0	18	*
aoqi@0	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0	20	* or visit www.oracle.com if you need additional information or have any
aoqi@0	21	* questions.
aoqi@0	22	*
aoqi@0	23	*/
aoqi@0	24
aoqi@1	25	/*
aoqi@1	26	* This file has been modified by Loongson Technology in 2015. These
aoqi@1	27	* modifications are Copyright (c) 2015 Loongson Technology, and are made
aoqi@1	28	* available on the same license terms set forth above.
aoqi@1	29	*/
aoqi@1	30
aoqi@0	31	#include "precompiled.hpp"
aoqi@0	32	#include "opto/c2compiler.hpp"
aoqi@0	33	#include "opto/runtime.hpp"
dlong@7598	34	#if defined AD_MD_HPP
dlong@7598	35	# include AD_MD_HPP
dlong@7598	36	#elif defined TARGET_ARCH_MODEL_x86_32
aoqi@0	37	# include "adfiles/ad_x86_32.hpp"
dlong@7598	38	#elif defined TARGET_ARCH_MODEL_x86_64
aoqi@0	39	# include "adfiles/ad_x86_64.hpp"
dlong@7598	40	#elif defined TARGET_ARCH_MODEL_sparc
kvn@6503	41	# include "adfiles/ad_sparc.hpp"
dlong@7598	42	#elif defined TARGET_ARCH_MODEL_zero
kvn@6503	43	# include "adfiles/ad_zero.hpp"
dlong@7598	44	#elif defined TARGET_ARCH_MODEL_ppc_64
kvn@6503	45	# include "adfiles/ad_ppc_64.hpp"
aoqi@7994	46	#elif defined TARGET_ARCH_MODEL_mips_64
aoqi@1	47	# include "adfiles/ad_mips_64.hpp"
aoqi@1	48	#endif
aoqi@0	49
aoqi@0	50	// register information defined by ADLC
aoqi@0	51	extern const char register_save_policy[];
aoqi@0	52	extern const int register_save_type[];
aoqi@0	53
aoqi@0	54	const char* C2Compiler::retry_no_subsuming_loads() {
aoqi@0	55	return "retry without subsuming loads";
aoqi@0	56	}
aoqi@0	57	const char* C2Compiler::retry_no_escape_analysis() {
aoqi@0	58	return "retry without escape analysis";
aoqi@0	59	}
shshahma@8421	60	const char* C2Compiler::retry_class_loading_during_parsing() {
shshahma@8421	61	return "retry class loading during parsing";
shshahma@8421	62	}
aoqi@0	63	bool C2Compiler::init_c2_runtime() {
aoqi@0	64
aoqi@0	65	// Check assumptions used while running ADLC
aoqi@0	66	Compile::adlc_verification();
aoqi@0	67	assert(REG_COUNT <= ConcreteRegisterImpl::number_of_registers, "incompatible register counts");
aoqi@0	68
aoqi@0	69	for (int i = 0; i < ConcreteRegisterImpl::number_of_registers ; i++ ) {
aoqi@0	70	OptoReg::vm2opto[i] = OptoReg::Bad;
aoqi@0	71	}
aoqi@0	72
aoqi@0	73	for( OptoReg::Name i=OptoReg::Name(0); i<OptoReg::Name(REG_COUNT); i = OptoReg::add(i,1) ) {
aoqi@0	74	VMReg r = OptoReg::as_VMReg(i);
aoqi@0	75	if (r->is_valid()) {
aoqi@0	76	OptoReg::vm2opto[r->value()] = i;
aoqi@0	77	}
aoqi@0	78	}
aoqi@0	79
aoqi@0	80	// Check that runtime and architecture description agree on callee-saved-floats
aoqi@0	81	bool callee_saved_floats = false;
aoqi@0	82	for( OptoReg::Name i=OptoReg::Name(0); i<OptoReg::Name(_last_Mach_Reg); i = OptoReg::add(i,1) ) {
aoqi@0	83	// Is there a callee-saved float or double?
aoqi@0	84	if( register_save_policy[i] == 'E' /* callee-saved */ &&
aoqi@0	85	(register_save_type[i] == Op_RegF || register_save_type[i] == Op_RegD) ) {
aoqi@0	86	callee_saved_floats = true;
aoqi@0	87	}
aoqi@0	88	}
aoqi@0	89
aoqi@0	90	DEBUG_ONLY( Node::init_NodeProperty(); )
aoqi@0	91
aoqi@0	92	Compile::pd_compiler2_init();
aoqi@0	93
aoqi@0	94	CompilerThread* thread = CompilerThread::current();
aoqi@0	95
aoqi@0	96	HandleMark handle_mark(thread);
aoqi@0	97	return OptoRuntime::generate(thread->env());
aoqi@0	98	}
aoqi@0	99
aoqi@0	100
aoqi@0	101	void C2Compiler::initialize() {
aoqi@0	102	// The first compiler thread that gets here will initialize the
aoqi@0	103	// small amount of global state (and runtime stubs) that C2 needs.
aoqi@0	104
aoqi@0	105	// There is a race possible once at startup and then we're fine
aoqi@0	106
aoqi@0	107	// Note that this is being called from a compiler thread not the
aoqi@0	108	// main startup thread.
aoqi@0	109	if (should_perform_init()) {
aoqi@0	110	bool successful = C2Compiler::init_c2_runtime();
aoqi@0	111	int new_state = (successful) ? initialized : failed;
aoqi@0	112	set_state(new_state);
aoqi@0	113	}
aoqi@0	114	}
aoqi@0	115
aoqi@0	116	void C2Compiler::compile_method(ciEnv* env, ciMethod* target, int entry_bci) {
aoqi@0	117	assert(is_initialized(), "Compiler thread must be initialized");
aoqi@0	118
aoqi@0	119	bool subsume_loads = SubsumeLoads;
aoqi@0	120	bool do_escape_analysis = DoEscapeAnalysis && !env->jvmti_can_access_local_variables();
aoqi@0	121	bool eliminate_boxing = EliminateAutoBox;
aoqi@0	122	while (!env->failing()) {
aoqi@0	123	// Attempt to compile while subsuming loads into machine instructions.
aoqi@0	124	Compile C(env, this, target, entry_bci, subsume_loads, do_escape_analysis, eliminate_boxing);
aoqi@0	125
aoqi@0	126
aoqi@0	127	// Check result and retry if appropriate.
aoqi@0	128	if (C.failure_reason() != NULL) {
shshahma@8421	129	if (C.failure_reason_is(retry_class_loading_during_parsing())) {
shshahma@8421	130	env->record_failure(C.failure_reason());
shshahma@8421	131	continue; // retry
shshahma@8421	132	}
aoqi@0	133	if (C.failure_reason_is(retry_no_subsuming_loads())) {
aoqi@0	134	assert(subsume_loads, "must make progress");
aoqi@0	135	subsume_loads = false;
aoqi@0	136	continue; // retry
aoqi@0	137	}
aoqi@0	138	if (C.failure_reason_is(retry_no_escape_analysis())) {
aoqi@0	139	assert(do_escape_analysis, "must make progress");
aoqi@0	140	do_escape_analysis = false;
aoqi@0	141	continue; // retry
aoqi@0	142	}
aoqi@0	143	if (C.has_boxed_value()) {
aoqi@0	144	// Recompile without boxing elimination regardless failure reason.
aoqi@0	145	assert(eliminate_boxing, "must make progress");
aoqi@0	146	eliminate_boxing = false;
aoqi@0	147	continue; // retry
aoqi@0	148	}
aoqi@0	149	// Pass any other failure reason up to the ciEnv.
aoqi@0	150	// Note that serious, irreversible failures are already logged
aoqi@0	151	// on the ciEnv via env->record_method_not_compilable().
aoqi@0	152	env->record_failure(C.failure_reason());
aoqi@0	153	}
aoqi@0	154	if (StressRecompilation) {
aoqi@0	155	if (subsume_loads) {
aoqi@0	156	subsume_loads = false;
aoqi@0	157	continue; // retry
aoqi@0	158	}
aoqi@0	159	if (do_escape_analysis) {
aoqi@0	160	do_escape_analysis = false;
aoqi@0	161	continue; // retry
aoqi@0	162	}
aoqi@0	163	}
aoqi@0	164
aoqi@0	165	// No retry; just break the loop.
aoqi@0	166	break;
aoqi@0	167	}
aoqi@0	168	}
aoqi@0	169
aoqi@0	170
aoqi@0	171	void C2Compiler::print_timers() {
aoqi@0	172	// do nothing
aoqi@0	173	}