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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/compiler/js-native-context-specialization.h" | 5 #include "src/compiler/js-native-context-specialization.h" |
6 | 6 |
7 #include "src/accessors.h" | 7 #include "src/accessors.h" |
8 #include "src/code-factory.h" | 8 #include "src/code-factory.h" |
9 #include "src/compilation-dependencies.h" | 9 #include "src/compilation-dependencies.h" |
10 #include "src/compiler/access-builder.h" | 10 #include "src/compiler/access-builder.h" |
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1275 if (nexus.IsUninitialized()) { | 1275 if (nexus.IsUninitialized()) { |
1276 return NoChange(); | 1276 return NoChange(); |
1277 } | 1277 } |
1278 | 1278 |
1279 if (nexus.ic_state() == MEGAMORPHIC) { | 1279 if (nexus.ic_state() == MEGAMORPHIC) { |
1280 return NoChange(); | 1280 return NoChange(); |
1281 } | 1281 } |
1282 | 1282 |
1283 DCHECK_EQ(MONOMORPHIC, nexus.ic_state()); | 1283 DCHECK_EQ(MONOMORPHIC, nexus.ic_state()); |
1284 | 1284 |
1285 Map* map = nexus.FindFirstMap(); | 1285 Handle<Map> receiver_map(nexus.FindFirstMap(), isolate()); |
1286 if (map == nullptr) { | |
1287 // Maps are weakly held in the type feedback vector, we may not have one. | |
1288 return NoChange(); | |
1289 } | |
1290 | |
1291 Handle<Map> receiver_map(map, isolate()); | |
1292 Handle<Name> cached_name = | 1286 Handle<Name> cached_name = |
1293 handle(Name::cast(nexus.GetFeedbackExtra()), isolate()); | 1287 handle(Name::cast(nexus.GetFeedbackExtra()), isolate()); |
1294 | 1288 |
1295 PropertyAccessInfo access_info; | 1289 PropertyAccessInfo access_info; |
1296 AccessInfoFactory access_info_factory(dependencies(), native_context(), | 1290 AccessInfoFactory access_info_factory(dependencies(), native_context(), |
1297 graph()->zone()); | 1291 graph()->zone()); |
1298 if (!access_info_factory.ComputePropertyAccessInfo( | 1292 if (!access_info_factory.ComputePropertyAccessInfo( |
1299 receiver_map, cached_name, AccessMode::kStoreInLiteral, | 1293 receiver_map, cached_name, AccessMode::kStoreInLiteral, |
1300 &access_info)) { | 1294 &access_info)) { |
1301 return NoChange(); | 1295 return NoChange(); |
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1919 return jsgraph()->javascript(); | 1913 return jsgraph()->javascript(); |
1920 } | 1914 } |
1921 | 1915 |
1922 SimplifiedOperatorBuilder* JSNativeContextSpecialization::simplified() const { | 1916 SimplifiedOperatorBuilder* JSNativeContextSpecialization::simplified() const { |
1923 return jsgraph()->simplified(); | 1917 return jsgraph()->simplified(); |
1924 } | 1918 } |
1925 | 1919 |
1926 } // namespace compiler | 1920 } // namespace compiler |
1927 } // namespace internal | 1921 } // namespace internal |
1928 } // namespace v8 | 1922 } // namespace v8 |
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