Thu, 01 Aug 2013 17:25:10 -0700
Merge
1 /*
2 * Copyright (c) 1999, 2011, 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 */
25 #include "precompiled.hpp"
26 #include "opto/c2compiler.hpp"
27 #include "opto/runtime.hpp"
28 #ifdef TARGET_ARCH_MODEL_x86_32
29 # include "adfiles/ad_x86_32.hpp"
30 #endif
31 #ifdef TARGET_ARCH_MODEL_x86_64
32 # include "adfiles/ad_x86_64.hpp"
33 #endif
34 #ifdef TARGET_ARCH_MODEL_sparc
35 # include "adfiles/ad_sparc.hpp"
36 #endif
37 #ifdef TARGET_ARCH_MODEL_zero
38 # include "adfiles/ad_zero.hpp"
39 #endif
40 #ifdef TARGET_ARCH_MODEL_arm
41 # include "adfiles/ad_arm.hpp"
42 #endif
43 #ifdef TARGET_ARCH_MODEL_ppc_32
44 # include "adfiles/ad_ppc_32.hpp"
45 #endif
46 #ifdef TARGET_ARCH_MODEL_ppc_64
47 # include "adfiles/ad_ppc_64.hpp"
48 #endif
51 volatile int C2Compiler::_runtimes = uninitialized;
53 // register information defined by ADLC
54 extern const char register_save_policy[];
55 extern const int register_save_type[];
57 const char* C2Compiler::retry_no_subsuming_loads() {
58 return "retry without subsuming loads";
59 }
60 const char* C2Compiler::retry_no_escape_analysis() {
61 return "retry without escape analysis";
62 }
63 void C2Compiler::initialize_runtime() {
65 // Check assumptions used while running ADLC
66 Compile::adlc_verification();
67 assert(REG_COUNT <= ConcreteRegisterImpl::number_of_registers, "incompatible register counts");
69 for (int i = 0; i < ConcreteRegisterImpl::number_of_registers ; i++ ) {
70 OptoReg::vm2opto[i] = OptoReg::Bad;
71 }
73 for( OptoReg::Name i=OptoReg::Name(0); i<OptoReg::Name(REG_COUNT); i = OptoReg::add(i,1) ) {
74 VMReg r = OptoReg::as_VMReg(i);
75 if (r->is_valid()) {
76 OptoReg::vm2opto[r->value()] = i;
77 }
78 }
80 // Check that runtime and architecture description agree on callee-saved-floats
81 bool callee_saved_floats = false;
82 for( OptoReg::Name i=OptoReg::Name(0); i<OptoReg::Name(_last_Mach_Reg); i = OptoReg::add(i,1) ) {
83 // Is there a callee-saved float or double?
84 if( register_save_policy[i] == 'E' /* callee-saved */ &&
85 (register_save_type[i] == Op_RegF || register_save_type[i] == Op_RegD) ) {
86 callee_saved_floats = true;
87 }
88 }
90 DEBUG_ONLY( Node::init_NodeProperty(); )
92 Compile::pd_compiler2_init();
94 CompilerThread* thread = CompilerThread::current();
96 HandleMark handle_mark(thread);
98 OptoRuntime::generate(thread->env());
100 }
103 void C2Compiler::initialize() {
105 // This method can only be called once per C2Compiler object
106 // The first compiler thread that gets here will initialize the
107 // small amount of global state (and runtime stubs) that c2 needs.
109 // There is a race possible once at startup and then we're fine
111 // Note that this is being called from a compiler thread not the
112 // main startup thread.
114 if (_runtimes != initialized) {
115 initialize_runtimes( initialize_runtime, &_runtimes);
116 }
118 // Mark this compiler object as ready to roll
119 mark_initialized();
120 }
122 void C2Compiler::compile_method(ciEnv* env,
123 ciMethod* target,
124 int entry_bci) {
125 if (!is_initialized()) {
126 initialize();
127 }
128 bool subsume_loads = SubsumeLoads;
129 bool do_escape_analysis = DoEscapeAnalysis &&
130 !env->jvmti_can_access_local_variables();
131 bool eliminate_boxing = EliminateAutoBox;
132 while (!env->failing()) {
133 // Attempt to compile while subsuming loads into machine instructions.
134 Compile C(env, this, target, entry_bci, subsume_loads, do_escape_analysis, eliminate_boxing);
137 // Check result and retry if appropriate.
138 if (C.failure_reason() != NULL) {
139 if (C.failure_reason_is(retry_no_subsuming_loads())) {
140 assert(subsume_loads, "must make progress");
141 subsume_loads = false;
142 continue; // retry
143 }
144 if (C.failure_reason_is(retry_no_escape_analysis())) {
145 assert(do_escape_analysis, "must make progress");
146 do_escape_analysis = false;
147 continue; // retry
148 }
149 if (C.has_boxed_value()) {
150 // Recompile without boxing elimination regardless failure reason.
151 assert(eliminate_boxing, "must make progress");
152 eliminate_boxing = false;
153 continue; // retry
154 }
155 // Pass any other failure reason up to the ciEnv.
156 // Note that serious, irreversible failures are already logged
157 // on the ciEnv via env->record_method_not_compilable().
158 env->record_failure(C.failure_reason());
159 }
160 if (StressRecompilation) {
161 if (subsume_loads) {
162 subsume_loads = false;
163 continue; // retry
164 }
165 if (do_escape_analysis) {
166 do_escape_analysis = false;
167 continue; // retry
168 }
169 }
171 // No retry; just break the loop.
172 break;
173 }
174 }
177 void C2Compiler::print_timers() {
178 // do nothing
179 }