1 /*
2 * Copyright (c) 1999, 2015, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "opto/c2compiler.hpp"
27 #include "opto/runtime.hpp"
28 #if defined AD_MD_HPP
29 # include AD_MD_HPP
30 #elif defined TARGET_ARCH_MODEL_x86_32
31 # include "adfiles/ad_x86_32.hpp"
32 #elif defined TARGET_ARCH_MODEL_x86_64
33 # include "adfiles/ad_x86_64.hpp"
34 #elif defined TARGET_ARCH_MODEL_aarch64
35 # include "adfiles/ad_aarch64.hpp"
36 #elif defined TARGET_ARCH_MODEL_sparc
37 # include "adfiles/ad_sparc.hpp"
38 #elif defined TARGET_ARCH_MODEL_zero
39 # include "adfiles/ad_zero.hpp"
40 #elif defined TARGET_ARCH_MODEL_ppc_64
41 # include "adfiles/ad_ppc_64.hpp"
42 #endif
43
44 // register information defined by ADLC
45 extern const char register_save_policy[];
46 extern const int register_save_type[];
47
48 const char* C2Compiler::retry_no_subsuming_loads() {
49 return "retry without subsuming loads";
50 }
51 const char* C2Compiler::retry_no_escape_analysis() {
52 return "retry without escape analysis";
53 }
54 const char* C2Compiler::retry_class_loading_during_parsing() {
55 return "retry class loading during parsing";
56 }
57 bool C2Compiler::init_c2_runtime() {
58
59 // Check assumptions used while running ADLC
60 Compile::adlc_verification();
61 assert(REG_COUNT <= ConcreteRegisterImpl::number_of_registers, "incompatible register counts");
62
63 for (int i = 0; i < ConcreteRegisterImpl::number_of_registers ; i++ ) {
64 OptoReg::vm2opto[i] = OptoReg::Bad;
65 }
66
67 for( OptoReg::Name i=OptoReg::Name(0); i<OptoReg::Name(REG_COUNT); i = OptoReg::add(i,1) ) {
68 VMReg r = OptoReg::as_VMReg(i);
69 if (r->is_valid()) {
70 OptoReg::vm2opto[r->value()] = i;
71 }
72 }
73
74 // Check that runtime and architecture description agree on callee-saved-floats
75 bool callee_saved_floats = false;
76 for( OptoReg::Name i=OptoReg::Name(0); i<OptoReg::Name(_last_Mach_Reg); i = OptoReg::add(i,1) ) {
77 // Is there a callee-saved float or double?
78 if( register_save_policy[i] == 'E' /* callee-saved */ &&
79 (register_save_type[i] == Op_RegF || register_save_type[i] == Op_RegD) ) {
80 callee_saved_floats = true;
81 }
82 }
83
84 DEBUG_ONLY( Node::init_NodeProperty(); )
85
86 Compile::pd_compiler2_init();
87
88 CompilerThread* thread = CompilerThread::current();
89
90 HandleMark handle_mark(thread);
91 return OptoRuntime::generate(thread->env());
92 }
93
94
95 void C2Compiler::initialize() {
96 // The first compiler thread that gets here will initialize the
97 // small amount of global state (and runtime stubs) that C2 needs.
98
99 // There is a race possible once at startup and then we're fine
100
101 // Note that this is being called from a compiler thread not the
102 // main startup thread.
103 if (should_perform_init()) {
104 bool successful = C2Compiler::init_c2_runtime();
105 int new_state = (successful) ? initialized : failed;
106 set_state(new_state);
107 }
108 }
109
110 void C2Compiler::compile_method(ciEnv* env, ciMethod* target, int entry_bci) {
111 assert(is_initialized(), "Compiler thread must be initialized");
112
113 bool subsume_loads = SubsumeLoads;
114 bool do_escape_analysis = DoEscapeAnalysis && !env->should_retain_local_variables();
115 bool eliminate_boxing = EliminateAutoBox;
116 while (!env->failing()) {
117 // Attempt to compile while subsuming loads into machine instructions.
118 Compile C(env, this, target, entry_bci, subsume_loads, do_escape_analysis, eliminate_boxing);
119
120
121 // Check result and retry if appropriate.
122 if (C.failure_reason() != NULL) {
123 if (C.failure_reason_is(retry_class_loading_during_parsing())) {
124 env->record_failure(C.failure_reason());
125 continue; // retry
126 }
127 if (C.failure_reason_is(retry_no_subsuming_loads())) {
128 assert(subsume_loads, "must make progress");
129 subsume_loads = false;
130 continue; // retry
131 }
132 if (C.failure_reason_is(retry_no_escape_analysis())) {
133 assert(do_escape_analysis, "must make progress");
134 do_escape_analysis = false;
135 continue; // retry
136 }
137 if (C.has_boxed_value()) {
138 // Recompile without boxing elimination regardless failure reason.
139 assert(eliminate_boxing, "must make progress");
140 eliminate_boxing = false;
141 continue; // retry
142 }
143 // Pass any other failure reason up to the ciEnv.
144 // Note that serious, irreversible failures are already logged
145 // on the ciEnv via env->record_method_not_compilable().
146 env->record_failure(C.failure_reason());
147 }
148 if (StressRecompilation) {
149 if (subsume_loads) {
150 subsume_loads = false;
151 continue; // retry
152 }
153 if (do_escape_analysis) {
154 do_escape_analysis = false;
155 continue; // retry
156 }
157 }
158
159 // No retry; just break the loop.
160 break;
161 }
162 }
163
164
165 void C2Compiler::print_timers() {
166 // do nothing
167 }