Mercurial > hg > truffle
annotate src/share/vm/opto/c2compiler.cpp @ 14397:53fa76359eb1
8016696: PPC64 (part 4): add relocation for trampoline stubs
Summary: A trampoline allows to encode a small branch in the code, even if there is the chance that this branch can not reach all possible code locations. If the relocation finds that a branch is too far for the instruction in the code, it can patch it to jump to the trampoline where is sufficient space for a far branch. Needed on PPC.
Reviewed-by: kvn, bdelsart, jrose
author | goetz |
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date | Thu, 04 Jul 2013 10:51:31 +0200 |
parents | d2907f74462e |
children | 2b8e28fdf503 |
rev | line source |
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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 |
14391 | 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" | |
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48 #endif |
0 | 49 |
50 | |
51 volatile int C2Compiler::_runtimes = uninitialized; | |
52 | |
53 // register information defined by ADLC | |
54 extern const char register_save_policy[]; | |
55 extern const int register_save_type[]; | |
56 | |
57 const char* C2Compiler::retry_no_subsuming_loads() { | |
58 return "retry without subsuming loads"; | |
59 } | |
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60 const char* C2Compiler::retry_no_escape_analysis() { |
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61 return "retry without escape analysis"; |
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62 } |
0 | 63 void C2Compiler::initialize_runtime() { |
64 | |
65 // Check assumptions used while running ADLC | |
66 Compile::adlc_verification(); | |
67 assert(REG_COUNT <= ConcreteRegisterImpl::number_of_registers, "incompatible register counts"); | |
68 | |
69 for (int i = 0; i < ConcreteRegisterImpl::number_of_registers ; i++ ) { | |
70 OptoReg::vm2opto[i] = OptoReg::Bad; | |
71 } | |
72 | |
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 } | |
79 | |
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 } | |
89 | |
90 DEBUG_ONLY( Node::init_NodeProperty(); ) | |
91 | |
92 Compile::pd_compiler2_init(); | |
93 | |
94 CompilerThread* thread = CompilerThread::current(); | |
95 | |
96 HandleMark handle_mark(thread); | |
97 | |
98 OptoRuntime::generate(thread->env()); | |
99 | |
100 } | |
101 | |
102 | |
103 void C2Compiler::initialize() { | |
104 | |
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. | |
108 | |
109 // There is a race possible once at startup and then we're fine | |
110 | |
111 // Note that this is being called from a compiler thread not the | |
112 // main startup thread. | |
113 | |
114 if (_runtimes != initialized) { | |
115 initialize_runtimes( initialize_runtime, &_runtimes); | |
116 } | |
117 | |
118 // Mark this compiler object as ready to roll | |
119 mark_initialized(); | |
120 } | |
121 | |
122 void C2Compiler::compile_method(ciEnv* env, | |
123 ciMethod* target, | |
124 int entry_bci) { | |
125 if (!is_initialized()) { | |
126 initialize(); | |
127 } | |
1685 | 128 bool subsume_loads = SubsumeLoads; |
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129 bool do_escape_analysis = DoEscapeAnalysis && |
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130 !env->jvmti_can_access_local_variables(); |
10278 | 131 bool eliminate_boxing = EliminateAutoBox; |
0 | 132 while (!env->failing()) { |
133 // Attempt to compile while subsuming loads into machine instructions. | |
10278 | 134 Compile C(env, this, target, entry_bci, subsume_loads, do_escape_analysis, eliminate_boxing); |
0 | 135 |
1685 | 136 |
0 | 137 // Check result and retry if appropriate. |
138 if (C.failure_reason() != NULL) { | |
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139 if (C.failure_reason_is(retry_no_subsuming_loads())) { |
0 | 140 assert(subsume_loads, "must make progress"); |
141 subsume_loads = false; | |
142 continue; // retry | |
143 } | |
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144 if (C.failure_reason_is(retry_no_escape_analysis())) { |
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145 assert(do_escape_analysis, "must make progress"); |
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146 do_escape_analysis = false; |
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147 continue; // retry |
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148 } |
10278 | 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 } | |
0 | 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 } | |
1685 | 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 } | |
0 | 170 |
171 // No retry; just break the loop. | |
172 break; | |
173 } | |
174 } | |
175 | |
176 | |
177 void C2Compiler::print_timers() { | |
178 // do nothing | |
179 } |