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1 // Copyright 2015 the V8 project authors. All rights reserved. | 1 // Copyright 2015 the V8 project authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "src/interpreter/bytecode-generator.h" | 5 #include "src/interpreter/bytecode-generator.h" |
6 | 6 |
7 #include "src/ast/scopes.h" | 7 #include "src/ast/scopes.h" |
8 #include "src/compiler.h" | 8 #include "src/compiler.h" |
9 #include "src/interpreter/control-flow-builders.h" | 9 #include "src/interpreter/control-flow-builders.h" |
10 #include "src/objects.h" | 10 #include "src/objects.h" |
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198 bool IsEffect() const { return kind_ == Expression::kEffect; } | 198 bool IsEffect() const { return kind_ == Expression::kEffect; } |
199 bool IsValue() const { return kind_ == Expression::kValue; } | 199 bool IsValue() const { return kind_ == Expression::kValue; } |
200 | 200 |
201 virtual void SetResultInAccumulator() = 0; | 201 virtual void SetResultInAccumulator() = 0; |
202 virtual void SetResultInRegister(Register reg) = 0; | 202 virtual void SetResultInRegister(Register reg) = 0; |
203 | 203 |
204 BytecodeGenerator* generator() const { return generator_; } | 204 BytecodeGenerator* generator() const { return generator_; } |
205 BytecodeArrayBuilder* builder() const { return generator()->builder(); } | 205 BytecodeArrayBuilder* builder() const { return generator()->builder(); } |
206 ExpressionResultScope* outer() const { return outer_; } | 206 ExpressionResultScope* outer() const { return outer_; } |
207 | 207 |
208 Register NewRegister() { return allocator_.NewRegister(); } | 208 Register NewRegister() { |
| 209 ExpressionResultScope* current_scope = generator()->execution_result(); |
| 210 if ((current_scope == this) || |
| 211 (current_scope->outer() == this && |
| 212 !current_scope->allocator_.hasConsecutiveAllocations())) { |
| 213 // Regular case - Allocating registers in current or outer context. |
| 214 // VisitForRegisterValue, allocates register in outer context. |
| 215 return allocator_.NewRegister(); |
| 216 } else { |
| 217 // We need this when allocating registers due to an Assignment hazard. |
| 218 // It might be expensive to walk the full context chain and compute the |
| 219 // list of consecutive reservations in the innerscopes. So allocates a |
| 220 // new unallocated temporary register. |
| 221 return allocator_.AllocateNewRegister(); |
| 222 } |
| 223 } |
209 | 224 |
210 void PrepareForConsecutiveAllocations(size_t count) { | 225 void PrepareForConsecutiveAllocations(size_t count) { |
211 allocator_.PrepareForConsecutiveAllocations(count); | 226 allocator_.PrepareForConsecutiveAllocations(count); |
212 } | 227 } |
213 | 228 |
214 Register NextConsecutiveRegister() { | 229 Register NextConsecutiveRegister() { |
215 return allocator_.NextConsecutiveRegister(); | 230 return allocator_.NextConsecutiveRegister(); |
216 } | 231 } |
217 | 232 |
218 protected: | 233 protected: |
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2198 } | 2213 } |
2199 | 2214 |
2200 | 2215 |
2201 int BytecodeGenerator::feedback_index(FeedbackVectorSlot slot) const { | 2216 int BytecodeGenerator::feedback_index(FeedbackVectorSlot slot) const { |
2202 return info()->feedback_vector()->GetIndex(slot); | 2217 return info()->feedback_vector()->GetIndex(slot); |
2203 } | 2218 } |
2204 | 2219 |
2205 } // namespace interpreter | 2220 } // namespace interpreter |
2206 } // namespace internal | 2221 } // namespace internal |
2207 } // namespace v8 | 2222 } // namespace v8 |
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