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Side by Side Diff: src/lithium-allocator.h

Issue 6025014: Remove unused policy from register allocator.... (Closed) Base URL: http://v8.googlecode.com/svn/branches/bleeding_edge/
Patch Set: Created 9 years, 11 months ago
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1 // Copyright 2010 the V8 project authors. All rights reserved. 1 // Copyright 2010 the V8 project authors. All rights reserved.
2 // Redistribution and use in source and binary forms, with or without 2 // Redistribution and use in source and binary forms, with or without
3 // modification, are permitted provided that the following conditions are 3 // modification, are permitted provided that the following conditions are
4 // met: 4 // met:
5 // 5 //
6 // * Redistributions of source code must retain the above copyright 6 // * Redistributions of source code must retain the above copyright
7 // notice, this list of conditions and the following disclaimer. 7 // notice, this list of conditions and the following disclaimer.
8 // * Redistributions in binary form must reproduce the above 8 // * Redistributions in binary form must reproduce the above
9 // copyright notice, this list of conditions and the following 9 // copyright notice, this list of conditions and the following
10 // disclaimer in the documentation and/or other materials provided 10 // disclaimer in the documentation and/or other materials provided
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198 public: 198 public:
199 enum Policy { 199 enum Policy {
200 NONE, 200 NONE,
201 ANY, 201 ANY,
202 FIXED_REGISTER, 202 FIXED_REGISTER,
203 FIXED_DOUBLE_REGISTER, 203 FIXED_DOUBLE_REGISTER,
204 FIXED_SLOT, 204 FIXED_SLOT,
205 MUST_HAVE_REGISTER, 205 MUST_HAVE_REGISTER,
206 WRITABLE_REGISTER, 206 WRITABLE_REGISTER,
207 SAME_AS_FIRST_INPUT, 207 SAME_AS_FIRST_INPUT,
208 SAME_AS_ANY_INPUT,
209 IGNORE 208 IGNORE
210 }; 209 };
211 210
212 // Lifetime of operand inside the instruction. 211 // Lifetime of operand inside the instruction.
213 enum Lifetime { 212 enum Lifetime {
214 // USED_AT_START operand is guaranteed to be live only at 213 // USED_AT_START operand is guaranteed to be live only at
215 // instruction start. Register allocator is free to assign the same register 214 // instruction start. Register allocator is free to assign the same register
216 // to some other operand used inside instruction (i.e. temporary or 215 // to some other operand used inside instruction (i.e. temporary or
217 // output). 216 // output).
218 USED_AT_START, 217 USED_AT_START,
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269 } 268 }
270 bool HasFixedPolicy() const { 269 bool HasFixedPolicy() const {
271 return policy() == FIXED_REGISTER || 270 return policy() == FIXED_REGISTER ||
272 policy() == FIXED_DOUBLE_REGISTER || 271 policy() == FIXED_DOUBLE_REGISTER ||
273 policy() == FIXED_SLOT; 272 policy() == FIXED_SLOT;
274 } 273 }
275 bool HasRegisterPolicy() const { 274 bool HasRegisterPolicy() const {
276 return policy() == WRITABLE_REGISTER || policy() == MUST_HAVE_REGISTER; 275 return policy() == WRITABLE_REGISTER || policy() == MUST_HAVE_REGISTER;
277 } 276 }
278 bool HasSameAsInputPolicy() const { 277 bool HasSameAsInputPolicy() const {
279 return policy() == SAME_AS_FIRST_INPUT || policy() == SAME_AS_ANY_INPUT; 278 return policy() == SAME_AS_FIRST_INPUT;
280 } 279 }
281 Policy policy() const { return PolicyField::decode(value_); } 280 Policy policy() const { return PolicyField::decode(value_); }
282 void set_policy(Policy policy) { 281 void set_policy(Policy policy) {
283 value_ &= ~PolicyField::mask(); 282 value_ &= ~PolicyField::mask();
284 value_ |= PolicyField::encode(policy); 283 value_ |= PolicyField::encode(policy);
285 } 284 }
286 int fixed_index() const { 285 int fixed_index() const {
287 return static_cast<int>(value_) >> kFixedIndexShift; 286 return static_cast<int>(value_) >> kFixedIndexShift;
288 } 287 }
289 288
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1018 1017
1019 bool has_osr_entry_; 1018 bool has_osr_entry_;
1020 1019
1021 DISALLOW_COPY_AND_ASSIGN(LAllocator); 1020 DISALLOW_COPY_AND_ASSIGN(LAllocator);
1022 }; 1021 };
1023 1022
1024 1023
1025 } } // namespace v8::internal 1024 } } // namespace v8::internal
1026 1025
1027 #endif // V8_LITHIUM_ALLOCATOR_H_ 1026 #endif // V8_LITHIUM_ALLOCATOR_H_
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