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1 // Copyright 2014 the V8 project authors. All rights reserved. | 1 // Copyright 2014 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/compiler/common-operator.h" | 5 #include "src/compiler/common-operator.h" |
6 #include "src/compiler/generic-node-inl.h" | 6 #include "src/compiler/generic-node-inl.h" |
7 #include "src/compiler/js-context-specialization.h" | 7 #include "src/compiler/js-context-specialization.h" |
8 #include "src/compiler/js-operator.h" | 8 #include "src/compiler/js-operator.h" |
9 #include "src/compiler/node-aux-data-inl.h" | 9 #include "src/compiler/node-aux-data-inl.h" |
10 #include "src/compiler/node-matchers.h" | 10 #include "src/compiler/node-matchers.h" |
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43 if (r.Changed() && r.replacement() != use) { | 43 if (r.Changed() && r.replacement() != use) { |
44 ReplaceEffectfulWithValue(use, r.replacement()); | 44 ReplaceEffectfulWithValue(use, r.replacement()); |
45 } | 45 } |
46 } | 46 } |
47 ++iter; | 47 ++iter; |
48 } | 48 } |
49 } | 49 } |
50 | 50 |
51 | 51 |
52 Reduction JSContextSpecializer::ReduceJSLoadContext(Node* node) { | 52 Reduction JSContextSpecializer::ReduceJSLoadContext(Node* node) { |
53 ASSERT_EQ(IrOpcode::kJSLoadContext, node->opcode()); | 53 DCHECK_EQ(IrOpcode::kJSLoadContext, node->opcode()); |
54 | 54 |
55 ContextAccess access = | 55 ContextAccess access = |
56 static_cast<Operator1<ContextAccess>*>(node->op())->parameter(); | 56 static_cast<Operator1<ContextAccess>*>(node->op())->parameter(); |
57 | 57 |
58 // Find the right parent context. | 58 // Find the right parent context. |
59 Context* context = *info_->context(); | 59 Context* context = *info_->context(); |
60 for (int i = access.depth(); i > 0; --i) { | 60 for (int i = access.depth(); i > 0; --i) { |
61 context = context->previous(); | 61 context = context->previous(); |
62 } | 62 } |
63 | 63 |
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84 if (value->IsUndefined() || value->IsTheHole()) return Reducer::NoChange(); | 84 if (value->IsUndefined() || value->IsTheHole()) return Reducer::NoChange(); |
85 | 85 |
86 // Success. The context load can be replaced with the constant. | 86 // Success. The context load can be replaced with the constant. |
87 // TODO(titzer): record the specialization for sharing code across multiple | 87 // TODO(titzer): record the specialization for sharing code across multiple |
88 // contexts that have the same value in the corresponding context slot. | 88 // contexts that have the same value in the corresponding context slot. |
89 return Reducer::Replace(jsgraph_->Constant(value)); | 89 return Reducer::Replace(jsgraph_->Constant(value)); |
90 } | 90 } |
91 } | 91 } |
92 } | 92 } |
93 } // namespace v8::internal::compiler | 93 } // namespace v8::internal::compiler |
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