Mercurial > hg > truffle
comparison src/share/vm/shark/sharkValue.hpp @ 1692:d2ede61b7a12
6976186: integrate Shark HotSpot changes
Summary: Shark is a JIT compiler for Zero that uses the LLVM compiler infrastructure.
Reviewed-by: kvn, twisti
Contributed-by: Gary Benson <gbenson@redhat.com>
author | twisti |
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date | Wed, 11 Aug 2010 05:51:21 -0700 |
parents | |
children | f95d63e2154a |
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1691:4a665be40fd3 | 1692:d2ede61b7a12 |
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1 /* | |
2 * Copyright (c) 1999, 2007, Oracle and/or its affiliates. All rights reserved. | |
3 * Copyright 2008, 2009 Red Hat, Inc. | |
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
5 * | |
6 * This code is free software; you can redistribute it and/or modify it | |
7 * under the terms of the GNU General Public License version 2 only, as | |
8 * published by the Free Software Foundation. | |
9 * | |
10 * This code is distributed in the hope that it will be useful, but WITHOUT | |
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
13 * version 2 for more details (a copy is included in the LICENSE file that | |
14 * accompanied this code). | |
15 * | |
16 * You should have received a copy of the GNU General Public License version | |
17 * 2 along with this work; if not, write to the Free Software Foundation, | |
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
19 * | |
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
21 * or visit www.oracle.com if you need additional information or have any | |
22 * questions. | |
23 * | |
24 */ | |
25 | |
26 // Items on the stack and in local variables are tracked using | |
27 // SharkValue objects. | |
28 // | |
29 // All SharkValues are one of two core types, SharkNormalValue | |
30 // and SharkAddressValue, but no code outside this file should | |
31 // ever refer to those directly. The split is because of the | |
32 // way JSRs are handled: the typeflow pass expands them into | |
33 // multiple copies, so the return addresses pushed by jsr and | |
34 // popped by ret only exist at compile time. Having separate | |
35 // classes for these allows us to check that our jsr handling | |
36 // is correct, via assertions. | |
37 // | |
38 // There is one more type, SharkPHIValue, which is a subclass | |
39 // of SharkNormalValue with a couple of extra methods. Use of | |
40 // SharkPHIValue outside of this file is acceptable, so long | |
41 // as it is obtained via SharkValue::as_phi(). | |
42 | |
43 class SharkBuilder; | |
44 class SharkPHIValue; | |
45 | |
46 class SharkValue : public ResourceObj { | |
47 protected: | |
48 SharkValue() {} | |
49 | |
50 // Cloning | |
51 public: | |
52 virtual SharkValue* clone() const = 0; | |
53 | |
54 // Casting | |
55 public: | |
56 virtual bool is_phi() const; | |
57 virtual SharkPHIValue* as_phi(); | |
58 | |
59 // Comparison | |
60 public: | |
61 virtual bool equal_to(SharkValue* other) const = 0; | |
62 | |
63 // Type access | |
64 public: | |
65 virtual BasicType basic_type() const = 0; | |
66 virtual ciType* type() const; | |
67 | |
68 virtual bool is_jint() const; | |
69 virtual bool is_jlong() const; | |
70 virtual bool is_jfloat() const; | |
71 virtual bool is_jdouble() const; | |
72 virtual bool is_jobject() const; | |
73 virtual bool is_jarray() const; | |
74 virtual bool is_address() const; | |
75 | |
76 virtual int size() const = 0; | |
77 | |
78 bool is_one_word() const { | |
79 return size() == 1; | |
80 } | |
81 bool is_two_word() const { | |
82 return size() == 2; | |
83 } | |
84 | |
85 // Typed conversion from SharkValues | |
86 public: | |
87 virtual llvm::Value* jint_value() const; | |
88 virtual llvm::Value* jlong_value() const; | |
89 virtual llvm::Value* jfloat_value() const; | |
90 virtual llvm::Value* jdouble_value() const; | |
91 virtual llvm::Value* jobject_value() const; | |
92 virtual llvm::Value* jarray_value() const; | |
93 virtual int address_value() const; | |
94 | |
95 // Typed conversion to SharkValues | |
96 public: | |
97 static SharkValue* create_jint(llvm::Value* value, bool zero_checked) { | |
98 assert(value->getType() == SharkType::jint_type(), "should be"); | |
99 return create_generic(ciType::make(T_INT), value, zero_checked); | |
100 } | |
101 static SharkValue* create_jlong(llvm::Value* value, bool zero_checked) { | |
102 assert(value->getType() == SharkType::jlong_type(), "should be"); | |
103 return create_generic(ciType::make(T_LONG), value, zero_checked); | |
104 } | |
105 static SharkValue* create_jfloat(llvm::Value* value) { | |
106 assert(value->getType() == SharkType::jfloat_type(), "should be"); | |
107 return create_generic(ciType::make(T_FLOAT), value, false); | |
108 } | |
109 static SharkValue* create_jdouble(llvm::Value* value) { | |
110 assert(value->getType() == SharkType::jdouble_type(), "should be"); | |
111 return create_generic(ciType::make(T_DOUBLE), value, false); | |
112 } | |
113 static SharkValue* create_jobject(llvm::Value* value, bool zero_checked) { | |
114 assert(value->getType() == SharkType::oop_type(), "should be"); | |
115 return create_generic(ciType::make(T_OBJECT), value, zero_checked); | |
116 } | |
117 | |
118 // Typed conversion from constants of various types | |
119 public: | |
120 static SharkValue* jint_constant(jint value) { | |
121 return create_jint(LLVMValue::jint_constant(value), value != 0); | |
122 } | |
123 static SharkValue* jlong_constant(jlong value) { | |
124 return create_jlong(LLVMValue::jlong_constant(value), value != 0); | |
125 } | |
126 static SharkValue* jfloat_constant(jfloat value) { | |
127 return create_jfloat(LLVMValue::jfloat_constant(value)); | |
128 } | |
129 static SharkValue* jdouble_constant(jdouble value) { | |
130 return create_jdouble(LLVMValue::jdouble_constant(value)); | |
131 } | |
132 static SharkValue* null() { | |
133 return create_jobject(LLVMValue::null(), false); | |
134 } | |
135 static inline SharkValue* address_constant(int bci); | |
136 | |
137 // Type-losing conversions -- use with care! | |
138 public: | |
139 virtual llvm::Value* generic_value() const = 0; | |
140 virtual llvm::Value* intptr_value(SharkBuilder* builder) const; | |
141 | |
142 static inline SharkValue* create_generic(ciType* type, | |
143 llvm::Value* value, | |
144 bool zero_checked); | |
145 static inline SharkValue* create_phi(ciType* type, | |
146 llvm::PHINode* phi, | |
147 const SharkPHIValue* parent = NULL); | |
148 | |
149 // Phi-style stuff | |
150 public: | |
151 virtual void addIncoming(SharkValue* value, llvm::BasicBlock* block); | |
152 virtual SharkValue* merge(SharkBuilder* builder, | |
153 SharkValue* other, | |
154 llvm::BasicBlock* other_block, | |
155 llvm::BasicBlock* this_block, | |
156 const char* name) = 0; | |
157 | |
158 // Repeated null and divide-by-zero check removal | |
159 public: | |
160 virtual bool zero_checked() const; | |
161 virtual void set_zero_checked(bool zero_checked); | |
162 }; | |
163 | |
164 class SharkNormalValue : public SharkValue { | |
165 friend class SharkValue; | |
166 | |
167 protected: | |
168 SharkNormalValue(ciType* type, llvm::Value* value, bool zero_checked) | |
169 : _type(type), _llvm_value(value), _zero_checked(zero_checked) {} | |
170 | |
171 private: | |
172 ciType* _type; | |
173 llvm::Value* _llvm_value; | |
174 bool _zero_checked; | |
175 | |
176 private: | |
177 llvm::Value* llvm_value() const { | |
178 return _llvm_value; | |
179 } | |
180 | |
181 // Cloning | |
182 public: | |
183 SharkValue* clone() const; | |
184 | |
185 // Comparison | |
186 public: | |
187 bool equal_to(SharkValue* other) const; | |
188 | |
189 // Type access | |
190 public: | |
191 ciType* type() const; | |
192 BasicType basic_type() const; | |
193 int size() const; | |
194 | |
195 public: | |
196 bool is_jint() const; | |
197 bool is_jlong() const; | |
198 bool is_jfloat() const; | |
199 bool is_jdouble() const; | |
200 bool is_jobject() const; | |
201 bool is_jarray() const; | |
202 | |
203 // Typed conversions to LLVM values | |
204 public: | |
205 llvm::Value* jint_value() const; | |
206 llvm::Value* jlong_value() const; | |
207 llvm::Value* jfloat_value() const; | |
208 llvm::Value* jdouble_value() const; | |
209 llvm::Value* jobject_value() const; | |
210 llvm::Value* jarray_value() const; | |
211 | |
212 // Type-losing conversions, use with care | |
213 public: | |
214 llvm::Value* generic_value() const; | |
215 llvm::Value* intptr_value(SharkBuilder* builder) const; | |
216 | |
217 // Phi-style stuff | |
218 public: | |
219 SharkValue* merge(SharkBuilder* builder, | |
220 SharkValue* other, | |
221 llvm::BasicBlock* other_block, | |
222 llvm::BasicBlock* this_block, | |
223 const char* name); | |
224 | |
225 // Repeated null and divide-by-zero check removal | |
226 public: | |
227 bool zero_checked() const; | |
228 void set_zero_checked(bool zero_checked); | |
229 }; | |
230 | |
231 class SharkPHIValue : public SharkNormalValue { | |
232 friend class SharkValue; | |
233 | |
234 protected: | |
235 SharkPHIValue(ciType* type, llvm::PHINode* phi, const SharkPHIValue *parent) | |
236 : SharkNormalValue(type, phi, parent && parent->zero_checked()), | |
237 _parent(parent), | |
238 _all_incomers_zero_checked(true) {} | |
239 | |
240 private: | |
241 const SharkPHIValue* _parent; | |
242 bool _all_incomers_zero_checked; | |
243 | |
244 private: | |
245 const SharkPHIValue* parent() const { | |
246 return _parent; | |
247 } | |
248 bool is_clone() const { | |
249 return parent() != NULL; | |
250 } | |
251 | |
252 public: | |
253 bool all_incomers_zero_checked() const { | |
254 if (is_clone()) | |
255 return parent()->all_incomers_zero_checked(); | |
256 | |
257 return _all_incomers_zero_checked; | |
258 } | |
259 | |
260 // Cloning | |
261 public: | |
262 SharkValue* clone() const; | |
263 | |
264 // Casting | |
265 public: | |
266 bool is_phi() const; | |
267 SharkPHIValue* as_phi(); | |
268 | |
269 // Phi-style stuff | |
270 public: | |
271 void addIncoming(SharkValue *value, llvm::BasicBlock* block); | |
272 }; | |
273 | |
274 class SharkAddressValue : public SharkValue { | |
275 friend class SharkValue; | |
276 | |
277 protected: | |
278 SharkAddressValue(int bci) | |
279 : _bci(bci) {} | |
280 | |
281 private: | |
282 int _bci; | |
283 | |
284 // Cloning | |
285 public: | |
286 SharkValue* clone() const; | |
287 | |
288 // Comparison | |
289 public: | |
290 bool equal_to(SharkValue* other) const; | |
291 | |
292 // Type access | |
293 public: | |
294 BasicType basic_type() const; | |
295 int size() const; | |
296 bool is_address() const; | |
297 | |
298 // Typed conversion from SharkValues | |
299 public: | |
300 int address_value() const; | |
301 | |
302 // Type-losing conversion -- use with care! | |
303 public: | |
304 llvm::Value* generic_value() const; | |
305 | |
306 // Phi-style stuff | |
307 public: | |
308 void addIncoming(SharkValue *value, llvm::BasicBlock* block); | |
309 SharkValue* merge(SharkBuilder* builder, | |
310 SharkValue* other, | |
311 llvm::BasicBlock* other_block, | |
312 llvm::BasicBlock* this_block, | |
313 const char* name); | |
314 }; | |
315 | |
316 // SharkValue methods that can't be declared above | |
317 | |
318 inline SharkValue* SharkValue::create_generic(ciType* type, | |
319 llvm::Value* value, | |
320 bool zero_checked) { | |
321 return new SharkNormalValue(type, value, zero_checked); | |
322 } | |
323 | |
324 inline SharkValue* SharkValue::create_phi(ciType* type, | |
325 llvm::PHINode* phi, | |
326 const SharkPHIValue* parent) { | |
327 return new SharkPHIValue(type, phi, parent); | |
328 } | |
329 | |
330 inline SharkValue* SharkValue::address_constant(int bci) { | |
331 return new SharkAddressValue(bci); | |
332 } |