Mercurial > hg > truffle
annotate src/share/vm/opto/c2compiler.cpp @ 10278:6f3fd5150b67
6934604: enable parts of EliminateAutoBox by default
Summary: Resurrected autobox elimination code and enabled part of it by default.
Reviewed-by: roland, twisti
| author | kvn |
|---|---|
| date | Wed, 08 May 2013 15:08:01 -0700 |
| parents | 1d1603768966 |
| children | 469216acdb28 d2907f74462e |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1999, 2011, Oracle and/or its affiliates. All rights reserved. |
| 0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 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 | |
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40 #ifdef TARGET_ARCH_MODEL_arm |
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41 # include "adfiles/ad_arm.hpp" |
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42 #endif |
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43 #ifdef TARGET_ARCH_MODEL_ppc |
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44 # include "adfiles/ad_ppc.hpp" |
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45 #endif |
| 0 | 46 |
| 47 | |
| 48 volatile int C2Compiler::_runtimes = uninitialized; | |
| 49 | |
| 50 // register information defined by ADLC | |
| 51 extern const char register_save_policy[]; | |
| 52 extern const int register_save_type[]; | |
| 53 | |
| 54 const char* C2Compiler::retry_no_subsuming_loads() { | |
| 55 return "retry without subsuming loads"; | |
| 56 } | |
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57 const char* C2Compiler::retry_no_escape_analysis() { |
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58 return "retry without escape analysis"; |
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59 } |
| 0 | 60 void C2Compiler::initialize_runtime() { |
| 61 | |
| 62 // Check assumptions used while running ADLC | |
| 63 Compile::adlc_verification(); | |
| 64 assert(REG_COUNT <= ConcreteRegisterImpl::number_of_registers, "incompatible register counts"); | |
| 65 | |
| 66 for (int i = 0; i < ConcreteRegisterImpl::number_of_registers ; i++ ) { | |
| 67 OptoReg::vm2opto[i] = OptoReg::Bad; | |
| 68 } | |
| 69 | |
| 70 for( OptoReg::Name i=OptoReg::Name(0); i<OptoReg::Name(REG_COUNT); i = OptoReg::add(i,1) ) { | |
| 71 VMReg r = OptoReg::as_VMReg(i); | |
| 72 if (r->is_valid()) { | |
| 73 OptoReg::vm2opto[r->value()] = i; | |
| 74 } | |
| 75 } | |
| 76 | |
| 77 // Check that runtime and architecture description agree on callee-saved-floats | |
| 78 bool callee_saved_floats = false; | |
| 79 for( OptoReg::Name i=OptoReg::Name(0); i<OptoReg::Name(_last_Mach_Reg); i = OptoReg::add(i,1) ) { | |
| 80 // Is there a callee-saved float or double? | |
| 81 if( register_save_policy[i] == 'E' /* callee-saved */ && | |
| 82 (register_save_type[i] == Op_RegF || register_save_type[i] == Op_RegD) ) { | |
| 83 callee_saved_floats = true; | |
| 84 } | |
| 85 } | |
| 86 | |
| 87 DEBUG_ONLY( Node::init_NodeProperty(); ) | |
| 88 | |
| 89 Compile::pd_compiler2_init(); | |
| 90 | |
| 91 CompilerThread* thread = CompilerThread::current(); | |
| 92 | |
| 93 HandleMark handle_mark(thread); | |
| 94 | |
| 95 OptoRuntime::generate(thread->env()); | |
| 96 | |
| 97 } | |
| 98 | |
| 99 | |
| 100 void C2Compiler::initialize() { | |
| 101 | |
| 102 // This method can only be called once per C2Compiler object | |
| 103 // The first compiler thread that gets here will initialize the | |
| 104 // small amount of global state (and runtime stubs) that c2 needs. | |
| 105 | |
| 106 // There is a race possible once at startup and then we're fine | |
| 107 | |
| 108 // Note that this is being called from a compiler thread not the | |
| 109 // main startup thread. | |
| 110 | |
| 111 if (_runtimes != initialized) { | |
| 112 initialize_runtimes( initialize_runtime, &_runtimes); | |
| 113 } | |
| 114 | |
| 115 // Mark this compiler object as ready to roll | |
| 116 mark_initialized(); | |
| 117 } | |
| 118 | |
| 119 void C2Compiler::compile_method(ciEnv* env, | |
| 120 ciMethod* target, | |
| 121 int entry_bci) { | |
| 122 if (!is_initialized()) { | |
| 123 initialize(); | |
| 124 } | |
| 1685 | 125 bool subsume_loads = SubsumeLoads; |
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126 bool do_escape_analysis = DoEscapeAnalysis && |
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127 !env->jvmti_can_access_local_variables(); |
| 10278 | 128 bool eliminate_boxing = EliminateAutoBox; |
| 0 | 129 while (!env->failing()) { |
| 130 // Attempt to compile while subsuming loads into machine instructions. | |
| 10278 | 131 Compile C(env, this, target, entry_bci, subsume_loads, do_escape_analysis, eliminate_boxing); |
| 0 | 132 |
| 1685 | 133 |
| 0 | 134 // Check result and retry if appropriate. |
| 135 if (C.failure_reason() != NULL) { | |
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136 if (C.failure_reason_is(retry_no_subsuming_loads())) { |
| 0 | 137 assert(subsume_loads, "must make progress"); |
| 138 subsume_loads = false; | |
| 139 continue; // retry | |
| 140 } | |
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141 if (C.failure_reason_is(retry_no_escape_analysis())) { |
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142 assert(do_escape_analysis, "must make progress"); |
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143 do_escape_analysis = false; |
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144 continue; // retry |
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145 } |
| 10278 | 146 if (C.has_boxed_value()) { |
| 147 // Recompile without boxing elimination regardless failure reason. | |
| 148 assert(eliminate_boxing, "must make progress"); | |
| 149 eliminate_boxing = false; | |
| 150 continue; // retry | |
| 151 } | |
| 0 | 152 // Pass any other failure reason up to the ciEnv. |
| 153 // Note that serious, irreversible failures are already logged | |
| 154 // on the ciEnv via env->record_method_not_compilable(). | |
| 155 env->record_failure(C.failure_reason()); | |
| 156 } | |
| 1685 | 157 if (StressRecompilation) { |
| 158 if (subsume_loads) { | |
| 159 subsume_loads = false; | |
| 160 continue; // retry | |
| 161 } | |
| 162 if (do_escape_analysis) { | |
| 163 do_escape_analysis = false; | |
| 164 continue; // retry | |
| 165 } | |
| 166 } | |
| 0 | 167 |
| 168 // No retry; just break the loop. | |
| 169 break; | |
| 170 } | |
| 171 } | |
| 172 | |
| 173 | |
| 174 void C2Compiler::print_timers() { | |
| 175 // do nothing | |
| 176 } |