Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1 | // Copyright 2012 the V8 project authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 5 | #include "src/ic/ic.h" |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 6 | |
| 7 | #include "src/accessors.h" |
| 8 | #include "src/api.h" |
| 9 | #include "src/arguments.h" |
| 10 | #include "src/base/bits.h" |
| 11 | #include "src/codegen.h" |
| 12 | #include "src/conversions.h" |
| 13 | #include "src/execution.h" |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 14 | #include "src/frames-inl.h" |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 15 | #include "src/ic/call-optimization.h" |
| 16 | #include "src/ic/handler-compiler.h" |
| 17 | #include "src/ic/ic-inl.h" |
| 18 | #include "src/ic/ic-compiler.h" |
| 19 | #include "src/ic/stub-cache.h" |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 20 | #include "src/isolate-inl.h" |
| 21 | #include "src/macro-assembler.h" |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 22 | #include "src/prototype.h" |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 23 | #include "src/runtime/runtime.h" |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 24 | |
| 25 | namespace v8 { |
| 26 | namespace internal { |
| 27 | |
| 28 | char IC::TransitionMarkFromState(IC::State state) { |
| 29 | switch (state) { |
| 30 | case UNINITIALIZED: |
| 31 | return '0'; |
| 32 | case PREMONOMORPHIC: |
| 33 | return '.'; |
| 34 | case MONOMORPHIC: |
| 35 | return '1'; |
| 36 | case PROTOTYPE_FAILURE: |
| 37 | return '^'; |
| 38 | case POLYMORPHIC: |
| 39 | return 'P'; |
| 40 | case MEGAMORPHIC: |
| 41 | return 'N'; |
| 42 | case GENERIC: |
| 43 | return 'G'; |
| 44 | |
| 45 | // We never see the debugger states here, because the state is |
| 46 | // computed from the original code - not the patched code. Let |
| 47 | // these cases fall through to the unreachable code below. |
| 48 | case DEBUG_STUB: |
| 49 | break; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 50 | } |
| 51 | UNREACHABLE(); |
| 52 | return 0; |
| 53 | } |
| 54 | |
| 55 | |
| 56 | const char* GetTransitionMarkModifier(KeyedAccessStoreMode mode) { |
| 57 | if (mode == STORE_NO_TRANSITION_HANDLE_COW) return ".COW"; |
| 58 | if (mode == STORE_NO_TRANSITION_IGNORE_OUT_OF_BOUNDS) { |
| 59 | return ".IGNORE_OOB"; |
| 60 | } |
| 61 | if (IsGrowStoreMode(mode)) return ".GROW"; |
| 62 | return ""; |
| 63 | } |
| 64 | |
| 65 | |
| 66 | #ifdef DEBUG |
| 67 | |
| 68 | #define TRACE_GENERIC_IC(isolate, type, reason) \ |
| 69 | do { \ |
| 70 | if (FLAG_trace_ic) { \ |
| 71 | PrintF("[%s patching generic stub in ", type); \ |
| 72 | JavaScriptFrame::PrintTop(isolate, stdout, false, true); \ |
| 73 | PrintF(" (%s)]\n", reason); \ |
| 74 | } \ |
| 75 | } while (false) |
| 76 | |
| 77 | #else |
| 78 | |
| 79 | #define TRACE_GENERIC_IC(isolate, type, reason) \ |
| 80 | do { \ |
| 81 | if (FLAG_trace_ic) { \ |
| 82 | PrintF("[%s patching generic stub in ", type); \ |
| 83 | PrintF("(see below) (%s)]\n", reason); \ |
| 84 | } \ |
| 85 | } while (false) |
| 86 | |
| 87 | #endif // DEBUG |
| 88 | |
| 89 | |
| 90 | void IC::TraceIC(const char* type, Handle<Object> name) { |
| 91 | if (FLAG_trace_ic) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 92 | if (AddressIsDeoptimizedCode()) return; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 93 | State new_state = |
| 94 | UseVector() ? nexus()->StateFromFeedback() : raw_target()->ic_state(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 95 | TraceIC(type, name, state(), new_state); |
| 96 | } |
| 97 | } |
| 98 | |
| 99 | |
| 100 | void IC::TraceIC(const char* type, Handle<Object> name, State old_state, |
| 101 | State new_state) { |
| 102 | if (FLAG_trace_ic) { |
| 103 | Code* new_target = raw_target(); |
| 104 | PrintF("[%s%s in ", new_target->is_keyed_stub() ? "Keyed" : "", type); |
| 105 | |
| 106 | // TODO(jkummerow): Add support for "apply". The logic is roughly: |
| 107 | // marker = [fp_ + kMarkerOffset]; |
| 108 | // if marker is smi and marker.value == INTERNAL and |
| 109 | // the frame's code == builtin(Builtins::kFunctionApply): |
| 110 | // then print "apply from" and advance one frame |
| 111 | |
| 112 | Object* maybe_function = |
| 113 | Memory::Object_at(fp_ + JavaScriptFrameConstants::kFunctionOffset); |
| 114 | if (maybe_function->IsJSFunction()) { |
| 115 | JSFunction* function = JSFunction::cast(maybe_function); |
| 116 | JavaScriptFrame::PrintFunctionAndOffset(function, function->code(), pc(), |
| 117 | stdout, true); |
| 118 | } |
| 119 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 120 | const char* modifier = ""; |
| 121 | if (new_target->kind() == Code::KEYED_STORE_IC) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 122 | KeyedAccessStoreMode mode = |
| 123 | casted_nexus<KeyedStoreICNexus>()->GetKeyedAccessStoreMode(); |
| 124 | modifier = GetTransitionMarkModifier(mode); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 125 | } |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 126 | PrintF(" (%c->%c%s) ", TransitionMarkFromState(old_state), |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 127 | TransitionMarkFromState(new_state), modifier); |
| 128 | #ifdef OBJECT_PRINT |
| 129 | OFStream os(stdout); |
| 130 | name->Print(os); |
| 131 | #else |
| 132 | name->ShortPrint(stdout); |
| 133 | #endif |
| 134 | PrintF("]\n"); |
| 135 | } |
| 136 | } |
| 137 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 138 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 139 | #define TRACE_IC(type, name) TraceIC(type, name) |
| 140 | |
| 141 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 142 | IC::IC(FrameDepth depth, Isolate* isolate, FeedbackNexus* nexus) |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 143 | : isolate_(isolate), |
| 144 | target_set_(false), |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 145 | vector_set_(false), |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 146 | target_maps_set_(false), |
| 147 | nexus_(nexus) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 148 | // To improve the performance of the (much used) IC code, we unfold a few |
| 149 | // levels of the stack frame iteration code. This yields a ~35% speedup when |
| 150 | // running DeltaBlue and a ~25% speedup of gbemu with the '--nouse-ic' flag. |
| 151 | const Address entry = Isolate::c_entry_fp(isolate->thread_local_top()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 152 | Address* constant_pool = NULL; |
| 153 | if (FLAG_enable_embedded_constant_pool) { |
| 154 | constant_pool = reinterpret_cast<Address*>( |
| 155 | entry + ExitFrameConstants::kConstantPoolOffset); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 156 | } |
| 157 | Address* pc_address = |
| 158 | reinterpret_cast<Address*>(entry + ExitFrameConstants::kCallerPCOffset); |
| 159 | Address fp = Memory::Address_at(entry + ExitFrameConstants::kCallerFPOffset); |
| 160 | // If there's another JavaScript frame on the stack or a |
| 161 | // StubFailureTrampoline, we need to look one frame further down the stack to |
| 162 | // find the frame pointer and the return address stack slot. |
| 163 | if (depth == EXTRA_CALL_FRAME) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 164 | if (FLAG_enable_embedded_constant_pool) { |
| 165 | constant_pool = reinterpret_cast<Address*>( |
| 166 | fp + StandardFrameConstants::kConstantPoolOffset); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 167 | } |
| 168 | const int kCallerPCOffset = StandardFrameConstants::kCallerPCOffset; |
| 169 | pc_address = reinterpret_cast<Address*>(fp + kCallerPCOffset); |
| 170 | fp = Memory::Address_at(fp + StandardFrameConstants::kCallerFPOffset); |
| 171 | } |
| 172 | #ifdef DEBUG |
| 173 | StackFrameIterator it(isolate); |
| 174 | for (int i = 0; i < depth + 1; i++) it.Advance(); |
| 175 | StackFrame* frame = it.frame(); |
| 176 | DCHECK(fp == frame->fp() && pc_address == frame->pc_address()); |
| 177 | #endif |
| 178 | fp_ = fp; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 179 | if (FLAG_enable_embedded_constant_pool) { |
| 180 | constant_pool_address_ = constant_pool; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 181 | } |
| 182 | pc_address_ = StackFrame::ResolveReturnAddressLocation(pc_address); |
| 183 | target_ = handle(raw_target(), isolate); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 184 | kind_ = target_->kind(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 185 | state_ = UseVector() ? nexus->StateFromFeedback() : target_->ic_state(); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 186 | old_state_ = state_; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 187 | extra_ic_state_ = target_->extra_ic_state(); |
| 188 | } |
| 189 | |
| 190 | |
| 191 | SharedFunctionInfo* IC::GetSharedFunctionInfo() const { |
| 192 | // Compute the JavaScript frame for the frame pointer of this IC |
| 193 | // structure. We need this to be able to find the function |
| 194 | // corresponding to the frame. |
| 195 | StackFrameIterator it(isolate()); |
| 196 | while (it.frame()->fp() != this->fp()) it.Advance(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 197 | if (FLAG_ignition && it.frame()->type() == StackFrame::STUB) { |
| 198 | // Advance over bytecode handler frame. |
| 199 | // TODO(rmcilroy): Remove this once bytecode handlers don't need a frame. |
| 200 | it.Advance(); |
| 201 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 202 | JavaScriptFrame* frame = JavaScriptFrame::cast(it.frame()); |
| 203 | // Find the function on the stack and both the active code for the |
| 204 | // function and the original code. |
| 205 | JSFunction* function = frame->function(); |
| 206 | return function->shared(); |
| 207 | } |
| 208 | |
| 209 | |
| 210 | Code* IC::GetCode() const { |
| 211 | HandleScope scope(isolate()); |
| 212 | Handle<SharedFunctionInfo> shared(GetSharedFunctionInfo(), isolate()); |
| 213 | Code* code = shared->code(); |
| 214 | return code; |
| 215 | } |
| 216 | |
| 217 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 218 | bool IC::AddressIsOptimizedCode() const { |
| 219 | Code* host = |
| 220 | isolate()->inner_pointer_to_code_cache()->GetCacheEntry(address())->code; |
| 221 | return host->kind() == Code::OPTIMIZED_FUNCTION; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 222 | } |
| 223 | |
| 224 | |
| 225 | static void LookupForRead(LookupIterator* it) { |
| 226 | for (; it->IsFound(); it->Next()) { |
| 227 | switch (it->state()) { |
| 228 | case LookupIterator::NOT_FOUND: |
| 229 | case LookupIterator::TRANSITION: |
| 230 | UNREACHABLE(); |
| 231 | case LookupIterator::JSPROXY: |
| 232 | return; |
| 233 | case LookupIterator::INTERCEPTOR: { |
| 234 | // If there is a getter, return; otherwise loop to perform the lookup. |
| 235 | Handle<JSObject> holder = it->GetHolder<JSObject>(); |
| 236 | if (!holder->GetNamedInterceptor()->getter()->IsUndefined()) { |
| 237 | return; |
| 238 | } |
| 239 | break; |
| 240 | } |
| 241 | case LookupIterator::ACCESS_CHECK: |
| 242 | // PropertyHandlerCompiler::CheckPrototypes() knows how to emit |
| 243 | // access checks for global proxies. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 244 | if (it->GetHolder<JSObject>()->IsJSGlobalProxy() && it->HasAccess()) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 245 | break; |
| 246 | } |
| 247 | return; |
| 248 | case LookupIterator::ACCESSOR: |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 249 | case LookupIterator::INTEGER_INDEXED_EXOTIC: |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 250 | case LookupIterator::DATA: |
| 251 | return; |
| 252 | } |
| 253 | } |
| 254 | } |
| 255 | |
| 256 | |
| 257 | bool IC::TryRemoveInvalidPrototypeDependentStub(Handle<Object> receiver, |
| 258 | Handle<String> name) { |
| 259 | if (!IsNameCompatibleWithPrototypeFailure(name)) return false; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 260 | if (UseVector()) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 261 | maybe_handler_ = nexus()->FindHandlerForMap(receiver_map()); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 262 | } else { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 263 | maybe_handler_ = target()->FindHandlerForMap(*receiver_map()); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 264 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 265 | |
| 266 | // The current map wasn't handled yet. There's no reason to stay monomorphic, |
| 267 | // *unless* we're moving from a deprecated map to its replacement, or |
| 268 | // to a more general elements kind. |
| 269 | // TODO(verwaest): Check if the current map is actually what the old map |
| 270 | // would transition to. |
| 271 | if (maybe_handler_.is_null()) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 272 | if (!receiver_map()->IsJSObjectMap()) return false; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 273 | Map* first_map = FirstTargetMap(); |
| 274 | if (first_map == NULL) return false; |
| 275 | Handle<Map> old_map(first_map); |
| 276 | if (old_map->is_deprecated()) return true; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 277 | return IsMoreGeneralElementsKindTransition(old_map->elements_kind(), |
| 278 | receiver_map()->elements_kind()); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 279 | } |
| 280 | |
| 281 | CacheHolderFlag flag; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 282 | Handle<Map> ic_holder_map(GetICCacheHolder(receiver_map(), isolate(), &flag)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 283 | |
| 284 | DCHECK(flag != kCacheOnReceiver || receiver->IsJSObject()); |
| 285 | DCHECK(flag != kCacheOnPrototype || !receiver->IsJSReceiver()); |
| 286 | DCHECK(flag != kCacheOnPrototypeReceiverIsDictionary); |
| 287 | |
| 288 | if (state() == MONOMORPHIC) { |
| 289 | int index = ic_holder_map->IndexInCodeCache(*name, *target()); |
| 290 | if (index >= 0) { |
| 291 | ic_holder_map->RemoveFromCodeCache(*name, *target(), index); |
| 292 | } |
| 293 | } |
| 294 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 295 | if (receiver->IsJSGlobalObject()) { |
| 296 | Handle<JSGlobalObject> global = Handle<JSGlobalObject>::cast(receiver); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 297 | LookupIterator it(global, name, LookupIterator::OWN_SKIP_INTERCEPTOR); |
| 298 | if (it.state() == LookupIterator::ACCESS_CHECK) return false; |
| 299 | if (!it.IsFound()) return false; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 300 | return it.property_details().cell_type() == PropertyCellType::kConstant; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 301 | } |
| 302 | |
| 303 | return true; |
| 304 | } |
| 305 | |
| 306 | |
| 307 | bool IC::IsNameCompatibleWithPrototypeFailure(Handle<Object> name) { |
| 308 | if (target()->is_keyed_stub()) { |
| 309 | // Determine whether the failure is due to a name failure. |
| 310 | if (!name->IsName()) return false; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 311 | Name* stub_name = |
| 312 | UseVector() ? nexus()->FindFirstName() : target()->FindFirstName(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 313 | if (*name != stub_name) return false; |
| 314 | } |
| 315 | |
| 316 | return true; |
| 317 | } |
| 318 | |
| 319 | |
| 320 | void IC::UpdateState(Handle<Object> receiver, Handle<Object> name) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 321 | update_receiver_map(receiver); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 322 | if (!name->IsString()) return; |
| 323 | if (state() != MONOMORPHIC && state() != POLYMORPHIC) return; |
| 324 | if (receiver->IsUndefined() || receiver->IsNull()) return; |
| 325 | |
| 326 | // Remove the target from the code cache if it became invalid |
| 327 | // because of changes in the prototype chain to avoid hitting it |
| 328 | // again. |
| 329 | if (TryRemoveInvalidPrototypeDependentStub(receiver, |
| 330 | Handle<String>::cast(name))) { |
| 331 | MarkPrototypeFailure(name); |
| 332 | return; |
| 333 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 334 | } |
| 335 | |
| 336 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 337 | MaybeHandle<Object> IC::TypeError(MessageTemplate::Template index, |
| 338 | Handle<Object> object, Handle<Object> key) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 339 | HandleScope scope(isolate()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 340 | THROW_NEW_ERROR(isolate(), NewTypeError(index, key, object), Object); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 341 | } |
| 342 | |
| 343 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 344 | MaybeHandle<Object> IC::ReferenceError(Handle<Name> name) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 345 | HandleScope scope(isolate()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 346 | THROW_NEW_ERROR( |
| 347 | isolate(), NewReferenceError(MessageTemplate::kNotDefined, name), Object); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 348 | } |
| 349 | |
| 350 | |
| 351 | static void ComputeTypeInfoCountDelta(IC::State old_state, IC::State new_state, |
| 352 | int* polymorphic_delta, |
| 353 | int* generic_delta) { |
| 354 | switch (old_state) { |
| 355 | case UNINITIALIZED: |
| 356 | case PREMONOMORPHIC: |
| 357 | if (new_state == UNINITIALIZED || new_state == PREMONOMORPHIC) break; |
| 358 | if (new_state == MONOMORPHIC || new_state == POLYMORPHIC) { |
| 359 | *polymorphic_delta = 1; |
| 360 | } else if (new_state == MEGAMORPHIC || new_state == GENERIC) { |
| 361 | *generic_delta = 1; |
| 362 | } |
| 363 | break; |
| 364 | case MONOMORPHIC: |
| 365 | case POLYMORPHIC: |
| 366 | if (new_state == MONOMORPHIC || new_state == POLYMORPHIC) break; |
| 367 | *polymorphic_delta = -1; |
| 368 | if (new_state == MEGAMORPHIC || new_state == GENERIC) { |
| 369 | *generic_delta = 1; |
| 370 | } |
| 371 | break; |
| 372 | case MEGAMORPHIC: |
| 373 | case GENERIC: |
| 374 | if (new_state == MEGAMORPHIC || new_state == GENERIC) break; |
| 375 | *generic_delta = -1; |
| 376 | if (new_state == MONOMORPHIC || new_state == POLYMORPHIC) { |
| 377 | *polymorphic_delta = 1; |
| 378 | } |
| 379 | break; |
| 380 | case PROTOTYPE_FAILURE: |
| 381 | case DEBUG_STUB: |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 382 | UNREACHABLE(); |
| 383 | } |
| 384 | } |
| 385 | |
| 386 | |
| 387 | void IC::OnTypeFeedbackChanged(Isolate* isolate, Address address, |
| 388 | State old_state, State new_state, |
| 389 | bool target_remains_ic_stub) { |
| 390 | Code* host = |
| 391 | isolate->inner_pointer_to_code_cache()->GetCacheEntry(address)->code; |
| 392 | if (host->kind() != Code::FUNCTION) return; |
| 393 | |
| 394 | if (FLAG_type_info_threshold > 0 && target_remains_ic_stub && |
| 395 | // Not all Code objects have TypeFeedbackInfo. |
| 396 | host->type_feedback_info()->IsTypeFeedbackInfo()) { |
| 397 | int polymorphic_delta = 0; // "Polymorphic" here includes monomorphic. |
| 398 | int generic_delta = 0; // "Generic" here includes megamorphic. |
| 399 | ComputeTypeInfoCountDelta(old_state, new_state, &polymorphic_delta, |
| 400 | &generic_delta); |
| 401 | TypeFeedbackInfo* info = TypeFeedbackInfo::cast(host->type_feedback_info()); |
| 402 | info->change_ic_with_type_info_count(polymorphic_delta); |
| 403 | info->change_ic_generic_count(generic_delta); |
| 404 | } |
| 405 | if (host->type_feedback_info()->IsTypeFeedbackInfo()) { |
| 406 | TypeFeedbackInfo* info = TypeFeedbackInfo::cast(host->type_feedback_info()); |
| 407 | info->change_own_type_change_checksum(); |
| 408 | } |
| 409 | host->set_profiler_ticks(0); |
| 410 | isolate->runtime_profiler()->NotifyICChanged(); |
| 411 | // TODO(2029): When an optimized function is patched, it would |
| 412 | // be nice to propagate the corresponding type information to its |
| 413 | // unoptimized version for the benefit of later inlining. |
| 414 | } |
| 415 | |
| 416 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 417 | // static |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 418 | void IC::OnTypeFeedbackChanged(Isolate* isolate, Code* host) { |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 419 | if (host->kind() != Code::FUNCTION) return; |
| 420 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 421 | TypeFeedbackInfo* info = TypeFeedbackInfo::cast(host->type_feedback_info()); |
| 422 | info->change_own_type_change_checksum(); |
| 423 | host->set_profiler_ticks(0); |
| 424 | isolate->runtime_profiler()->NotifyICChanged(); |
| 425 | // TODO(2029): When an optimized function is patched, it would |
| 426 | // be nice to propagate the corresponding type information to its |
| 427 | // unoptimized version for the benefit of later inlining. |
| 428 | } |
| 429 | |
| 430 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 431 | void IC::PostPatching(Address address, Code* target, Code* old_target) { |
| 432 | // Type vector based ICs update these statistics at a different time because |
| 433 | // they don't always patch on state change. |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 434 | if (ICUseVector(target->kind())) return; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 435 | |
| 436 | Isolate* isolate = target->GetHeap()->isolate(); |
| 437 | State old_state = UNINITIALIZED; |
| 438 | State new_state = UNINITIALIZED; |
| 439 | bool target_remains_ic_stub = false; |
| 440 | if (old_target->is_inline_cache_stub() && target->is_inline_cache_stub()) { |
| 441 | old_state = old_target->ic_state(); |
| 442 | new_state = target->ic_state(); |
| 443 | target_remains_ic_stub = true; |
| 444 | } |
| 445 | |
| 446 | OnTypeFeedbackChanged(isolate, address, old_state, new_state, |
| 447 | target_remains_ic_stub); |
| 448 | } |
| 449 | |
| 450 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 451 | void IC::Clear(Isolate* isolate, Address address, Address constant_pool) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 452 | Code* target = GetTargetAtAddress(address, constant_pool); |
| 453 | |
| 454 | // Don't clear debug break inline cache as it will remove the break point. |
| 455 | if (target->is_debug_stub()) return; |
| 456 | |
| 457 | switch (target->kind()) { |
| 458 | case Code::LOAD_IC: |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 459 | case Code::KEYED_LOAD_IC: |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 460 | case Code::STORE_IC: |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 461 | case Code::KEYED_STORE_IC: |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 462 | return; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 463 | case Code::COMPARE_IC: |
| 464 | return CompareIC::Clear(isolate, address, target, constant_pool); |
| 465 | case Code::COMPARE_NIL_IC: |
| 466 | return CompareNilIC::Clear(address, target, constant_pool); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 467 | case Code::CALL_IC: // CallICs are vector-based and cleared differently. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 468 | case Code::BINARY_OP_IC: |
| 469 | case Code::TO_BOOLEAN_IC: |
| 470 | // Clearing these is tricky and does not |
| 471 | // make any performance difference. |
| 472 | return; |
| 473 | default: |
| 474 | UNREACHABLE(); |
| 475 | } |
| 476 | } |
| 477 | |
| 478 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 479 | void KeyedLoadIC::Clear(Isolate* isolate, Code* host, KeyedLoadICNexus* nexus) { |
| 480 | if (IsCleared(nexus)) return; |
| 481 | // Make sure to also clear the map used in inline fast cases. If we |
| 482 | // do not clear these maps, cached code can keep objects alive |
| 483 | // through the embedded maps. |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 484 | nexus->ConfigurePremonomorphic(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 485 | OnTypeFeedbackChanged(isolate, host); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 486 | } |
| 487 | |
| 488 | |
| 489 | void CallIC::Clear(Isolate* isolate, Code* host, CallICNexus* nexus) { |
| 490 | // Determine our state. |
| 491 | Object* feedback = nexus->vector()->Get(nexus->slot()); |
| 492 | State state = nexus->StateFromFeedback(); |
| 493 | |
| 494 | if (state != UNINITIALIZED && !feedback->IsAllocationSite()) { |
| 495 | nexus->ConfigureUninitialized(); |
| 496 | // The change in state must be processed. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 497 | OnTypeFeedbackChanged(isolate, host); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 498 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 499 | } |
| 500 | |
| 501 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 502 | void LoadIC::Clear(Isolate* isolate, Code* host, LoadICNexus* nexus) { |
| 503 | if (IsCleared(nexus)) return; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 504 | nexus->ConfigurePremonomorphic(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 505 | OnTypeFeedbackChanged(isolate, host); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 506 | } |
| 507 | |
| 508 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 509 | void StoreIC::Clear(Isolate* isolate, Address address, Code* target, |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 510 | Address constant_pool) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 511 | if (IsCleared(target)) return; |
| 512 | Code* code = PropertyICCompiler::FindPreMonomorphic(isolate, Code::STORE_IC, |
| 513 | target->extra_ic_state()); |
| 514 | SetTargetAtAddress(address, code, constant_pool); |
| 515 | } |
| 516 | |
| 517 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 518 | void StoreIC::Clear(Isolate* isolate, Code* host, StoreICNexus* nexus) { |
| 519 | if (IsCleared(nexus)) return; |
| 520 | nexus->ConfigurePremonomorphic(); |
| 521 | OnTypeFeedbackChanged(isolate, host); |
| 522 | } |
| 523 | |
| 524 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 525 | void KeyedStoreIC::Clear(Isolate* isolate, Address address, Code* target, |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 526 | Address constant_pool) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 527 | if (IsCleared(target)) return; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 528 | Handle<Code> code = pre_monomorphic_stub( |
| 529 | isolate, StoreICState::GetLanguageMode(target->extra_ic_state())); |
| 530 | SetTargetAtAddress(address, *code, constant_pool); |
| 531 | } |
| 532 | |
| 533 | |
| 534 | void KeyedStoreIC::Clear(Isolate* isolate, Code* host, |
| 535 | KeyedStoreICNexus* nexus) { |
| 536 | if (IsCleared(nexus)) return; |
| 537 | nexus->ConfigurePremonomorphic(); |
| 538 | OnTypeFeedbackChanged(isolate, host); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 539 | } |
| 540 | |
| 541 | |
| 542 | void CompareIC::Clear(Isolate* isolate, Address address, Code* target, |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 543 | Address constant_pool) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 544 | DCHECK(CodeStub::GetMajorKey(target) == CodeStub::CompareIC); |
| 545 | CompareICStub stub(target->stub_key(), isolate); |
| 546 | // Only clear CompareICs that can retain objects. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 547 | if (stub.state() != CompareICState::KNOWN_RECEIVER) return; |
| 548 | SetTargetAtAddress(address, |
| 549 | GetRawUninitialized(isolate, stub.op(), stub.strength()), |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 550 | constant_pool); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 551 | PatchInlinedSmiCode(isolate, address, DISABLE_INLINED_SMI_CHECK); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 552 | } |
| 553 | |
| 554 | |
| 555 | // static |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 556 | Handle<Code> KeyedLoadIC::ChooseMegamorphicStub(Isolate* isolate, |
| 557 | ExtraICState extra_state) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 558 | if (FLAG_compiled_keyed_generic_loads) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 559 | return KeyedLoadGenericStub(isolate, LoadICState(extra_state)).GetCode(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 560 | } else { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 561 | return is_strong(LoadICState::GetLanguageMode(extra_state)) |
| 562 | ? isolate->builtins()->KeyedLoadIC_Megamorphic_Strong() |
| 563 | : isolate->builtins()->KeyedLoadIC_Megamorphic(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 564 | } |
| 565 | } |
| 566 | |
| 567 | |
| 568 | static bool MigrateDeprecated(Handle<Object> object) { |
| 569 | if (!object->IsJSObject()) return false; |
| 570 | Handle<JSObject> receiver = Handle<JSObject>::cast(object); |
| 571 | if (!receiver->map()->is_deprecated()) return false; |
| 572 | JSObject::MigrateInstance(Handle<JSObject>::cast(object)); |
| 573 | return true; |
| 574 | } |
| 575 | |
| 576 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 577 | void IC::ConfigureVectorState(IC::State new_state) { |
| 578 | DCHECK(UseVector()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 579 | if (new_state == PREMONOMORPHIC) { |
| 580 | nexus()->ConfigurePremonomorphic(); |
| 581 | } else if (new_state == MEGAMORPHIC) { |
| 582 | nexus()->ConfigureMegamorphic(); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 583 | } else { |
| 584 | UNREACHABLE(); |
| 585 | } |
| 586 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 587 | vector_set_ = true; |
| 588 | OnTypeFeedbackChanged(isolate(), get_host()); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 589 | } |
| 590 | |
| 591 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 592 | void IC::ConfigureVectorState(Handle<Name> name, Handle<Map> map, |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 593 | Handle<Code> handler) { |
| 594 | DCHECK(UseVector()); |
| 595 | if (kind() == Code::LOAD_IC) { |
| 596 | LoadICNexus* nexus = casted_nexus<LoadICNexus>(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 597 | nexus->ConfigureMonomorphic(map, handler); |
| 598 | } else if (kind() == Code::KEYED_LOAD_IC) { |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 599 | KeyedLoadICNexus* nexus = casted_nexus<KeyedLoadICNexus>(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 600 | nexus->ConfigureMonomorphic(name, map, handler); |
| 601 | } else if (kind() == Code::STORE_IC) { |
| 602 | StoreICNexus* nexus = casted_nexus<StoreICNexus>(); |
| 603 | nexus->ConfigureMonomorphic(map, handler); |
| 604 | } else { |
| 605 | DCHECK(kind() == Code::KEYED_STORE_IC); |
| 606 | KeyedStoreICNexus* nexus = casted_nexus<KeyedStoreICNexus>(); |
| 607 | nexus->ConfigureMonomorphic(name, map, handler); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 608 | } |
| 609 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 610 | vector_set_ = true; |
| 611 | OnTypeFeedbackChanged(isolate(), get_host()); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 612 | } |
| 613 | |
| 614 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 615 | void IC::ConfigureVectorState(Handle<Name> name, MapHandleList* maps, |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 616 | CodeHandleList* handlers) { |
| 617 | DCHECK(UseVector()); |
| 618 | if (kind() == Code::LOAD_IC) { |
| 619 | LoadICNexus* nexus = casted_nexus<LoadICNexus>(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 620 | nexus->ConfigurePolymorphic(maps, handlers); |
| 621 | } else if (kind() == Code::KEYED_LOAD_IC) { |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 622 | KeyedLoadICNexus* nexus = casted_nexus<KeyedLoadICNexus>(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 623 | nexus->ConfigurePolymorphic(name, maps, handlers); |
| 624 | } else if (kind() == Code::STORE_IC) { |
| 625 | StoreICNexus* nexus = casted_nexus<StoreICNexus>(); |
| 626 | nexus->ConfigurePolymorphic(maps, handlers); |
| 627 | } else { |
| 628 | DCHECK(kind() == Code::KEYED_STORE_IC); |
| 629 | KeyedStoreICNexus* nexus = casted_nexus<KeyedStoreICNexus>(); |
| 630 | nexus->ConfigurePolymorphic(name, maps, handlers); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 631 | } |
| 632 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 633 | vector_set_ = true; |
| 634 | OnTypeFeedbackChanged(isolate(), get_host()); |
| 635 | } |
| 636 | |
| 637 | |
| 638 | void IC::ConfigureVectorState(MapHandleList* maps, |
| 639 | MapHandleList* transitioned_maps, |
| 640 | CodeHandleList* handlers) { |
| 641 | DCHECK(UseVector()); |
| 642 | DCHECK(kind() == Code::KEYED_STORE_IC); |
| 643 | KeyedStoreICNexus* nexus = casted_nexus<KeyedStoreICNexus>(); |
| 644 | nexus->ConfigurePolymorphic(maps, transitioned_maps, handlers); |
| 645 | |
| 646 | vector_set_ = true; |
| 647 | OnTypeFeedbackChanged(isolate(), get_host()); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 648 | } |
| 649 | |
| 650 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 651 | MaybeHandle<Object> LoadIC::Load(Handle<Object> object, Handle<Name> name) { |
| 652 | // If the object is undefined or null it's illegal to try to get any |
| 653 | // of its properties; throw a TypeError in that case. |
| 654 | if (object->IsUndefined() || object->IsNull()) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 655 | return TypeError(MessageTemplate::kNonObjectPropertyLoad, object, name); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 656 | } |
| 657 | |
| 658 | // Check if the name is trivially convertible to an index and get |
| 659 | // the element or char if so. |
| 660 | uint32_t index; |
| 661 | if (kind() == Code::KEYED_LOAD_IC && name->AsArrayIndex(&index)) { |
| 662 | // Rewrite to the generic keyed load stub. |
| 663 | if (FLAG_use_ic) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 664 | DCHECK(UseVector()); |
| 665 | ConfigureVectorState(MEGAMORPHIC); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 666 | TRACE_IC("LoadIC", name); |
| 667 | TRACE_GENERIC_IC(isolate(), "LoadIC", "name as array index"); |
| 668 | } |
| 669 | Handle<Object> result; |
| 670 | ASSIGN_RETURN_ON_EXCEPTION( |
| 671 | isolate(), result, |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 672 | Object::GetElement(isolate(), object, index, language_mode()), Object); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 673 | return result; |
| 674 | } |
| 675 | |
| 676 | bool use_ic = MigrateDeprecated(object) ? false : FLAG_use_ic; |
| 677 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 678 | if (object->IsJSGlobalObject() && name->IsString()) { |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 679 | // Look up in script context table. |
| 680 | Handle<String> str_name = Handle<String>::cast(name); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 681 | Handle<JSGlobalObject> global = Handle<JSGlobalObject>::cast(object); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 682 | Handle<ScriptContextTable> script_contexts( |
| 683 | global->native_context()->script_context_table()); |
| 684 | |
| 685 | ScriptContextTable::LookupResult lookup_result; |
| 686 | if (ScriptContextTable::Lookup(script_contexts, str_name, &lookup_result)) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 687 | Handle<Object> result = |
| 688 | FixedArray::get(ScriptContextTable::GetContext( |
| 689 | script_contexts, lookup_result.context_index), |
| 690 | lookup_result.slot_index); |
| 691 | if (*result == *isolate()->factory()->the_hole_value()) { |
| 692 | // Do not install stubs and stay pre-monomorphic for |
| 693 | // uninitialized accesses. |
| 694 | return ReferenceError(name); |
| 695 | } |
| 696 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 697 | if (use_ic && LoadScriptContextFieldStub::Accepted(&lookup_result)) { |
| 698 | LoadScriptContextFieldStub stub(isolate(), &lookup_result); |
| 699 | PatchCache(name, stub.GetCode()); |
| 700 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 701 | return result; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 702 | } |
| 703 | } |
| 704 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 705 | // Named lookup in the object. |
| 706 | LookupIterator it(object, name); |
| 707 | LookupForRead(&it); |
| 708 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 709 | if (it.IsFound() || !ShouldThrowReferenceError(object)) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 710 | // Update inline cache and stub cache. |
| 711 | if (use_ic) UpdateCaches(&it); |
| 712 | |
| 713 | // Get the property. |
| 714 | Handle<Object> result; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 715 | |
| 716 | ASSIGN_RETURN_ON_EXCEPTION( |
| 717 | isolate(), result, Object::GetProperty(&it, language_mode()), Object); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 718 | if (it.IsFound()) { |
| 719 | return result; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 720 | } else if (!ShouldThrowReferenceError(object)) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 721 | LOG(isolate(), SuspectReadEvent(*name, *object)); |
| 722 | return result; |
| 723 | } |
| 724 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 725 | return ReferenceError(name); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 726 | } |
| 727 | |
| 728 | |
| 729 | static bool AddOneReceiverMapIfMissing(MapHandleList* receiver_maps, |
| 730 | Handle<Map> new_receiver_map) { |
| 731 | DCHECK(!new_receiver_map.is_null()); |
| 732 | for (int current = 0; current < receiver_maps->length(); ++current) { |
| 733 | if (!receiver_maps->at(current).is_null() && |
| 734 | receiver_maps->at(current).is_identical_to(new_receiver_map)) { |
| 735 | return false; |
| 736 | } |
| 737 | } |
| 738 | receiver_maps->Add(new_receiver_map); |
| 739 | return true; |
| 740 | } |
| 741 | |
| 742 | |
| 743 | bool IC::UpdatePolymorphicIC(Handle<Name> name, Handle<Code> code) { |
| 744 | if (!code->is_handler()) return false; |
| 745 | if (target()->is_keyed_stub() && state() != PROTOTYPE_FAILURE) return false; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 746 | Handle<Map> map = receiver_map(); |
| 747 | MapHandleList maps; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 748 | CodeHandleList handlers; |
| 749 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 750 | TargetMaps(&maps); |
| 751 | int number_of_maps = maps.length(); |
| 752 | int deprecated_maps = 0; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 753 | int handler_to_overwrite = -1; |
| 754 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 755 | for (int i = 0; i < number_of_maps; i++) { |
| 756 | Handle<Map> current_map = maps.at(i); |
| 757 | if (current_map->is_deprecated()) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 758 | // Filter out deprecated maps to ensure their instances get migrated. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 759 | ++deprecated_maps; |
| 760 | } else if (map.is_identical_to(current_map)) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 761 | // If the receiver type is already in the polymorphic IC, this indicates |
| 762 | // there was a prototoype chain failure. In that case, just overwrite the |
| 763 | // handler. |
| 764 | handler_to_overwrite = i; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 765 | } else if (handler_to_overwrite == -1 && |
| 766 | IsTransitionOfMonomorphicTarget(*current_map, *map)) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 767 | handler_to_overwrite = i; |
| 768 | } |
| 769 | } |
| 770 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 771 | int number_of_valid_maps = |
| 772 | number_of_maps - deprecated_maps - (handler_to_overwrite != -1); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 773 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 774 | if (number_of_valid_maps >= 4) return false; |
| 775 | if (number_of_maps == 0 && state() != MONOMORPHIC && state() != POLYMORPHIC) { |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 776 | return false; |
| 777 | } |
| 778 | if (UseVector()) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 779 | if (!nexus()->FindHandlers(&handlers, maps.length())) return false; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 780 | } else { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 781 | if (!target()->FindHandlers(&handlers, maps.length())) return false; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 782 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 783 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 784 | number_of_valid_maps++; |
| 785 | if (number_of_valid_maps > 1 && target()->is_keyed_stub()) return false; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 786 | Handle<Code> ic; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 787 | if (number_of_valid_maps == 1) { |
| 788 | ConfigureVectorState(name, receiver_map(), code); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 789 | } else { |
| 790 | if (handler_to_overwrite >= 0) { |
| 791 | handlers.Set(handler_to_overwrite, code); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 792 | if (!map.is_identical_to(maps.at(handler_to_overwrite))) { |
| 793 | maps.Set(handler_to_overwrite, map); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 794 | } |
| 795 | } else { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 796 | maps.Add(map); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 797 | handlers.Add(code); |
| 798 | } |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 799 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 800 | ConfigureVectorState(name, &maps, &handlers); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 801 | } |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 802 | |
| 803 | if (!UseVector()) set_target(*ic); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 804 | return true; |
| 805 | } |
| 806 | |
| 807 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 808 | void IC::UpdateMonomorphicIC(Handle<Code> handler, Handle<Name> name) { |
| 809 | DCHECK(handler->is_handler()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 810 | ConfigureVectorState(name, receiver_map(), handler); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 811 | } |
| 812 | |
| 813 | |
| 814 | void IC::CopyICToMegamorphicCache(Handle<Name> name) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 815 | MapHandleList maps; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 816 | CodeHandleList handlers; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 817 | TargetMaps(&maps); |
| 818 | if (!target()->FindHandlers(&handlers, maps.length())) return; |
| 819 | for (int i = 0; i < maps.length(); i++) { |
| 820 | UpdateMegamorphicCache(*maps.at(i), *name, *handlers.at(i)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 821 | } |
| 822 | } |
| 823 | |
| 824 | |
| 825 | bool IC::IsTransitionOfMonomorphicTarget(Map* source_map, Map* target_map) { |
| 826 | if (source_map == NULL) return true; |
| 827 | if (target_map == NULL) return false; |
| 828 | ElementsKind target_elements_kind = target_map->elements_kind(); |
| 829 | bool more_general_transition = IsMoreGeneralElementsKindTransition( |
| 830 | source_map->elements_kind(), target_elements_kind); |
| 831 | Map* transitioned_map = |
| 832 | more_general_transition |
| 833 | ? source_map->LookupElementsTransitionMap(target_elements_kind) |
| 834 | : NULL; |
| 835 | |
| 836 | return transitioned_map == target_map; |
| 837 | } |
| 838 | |
| 839 | |
| 840 | void IC::PatchCache(Handle<Name> name, Handle<Code> code) { |
| 841 | switch (state()) { |
| 842 | case UNINITIALIZED: |
| 843 | case PREMONOMORPHIC: |
| 844 | UpdateMonomorphicIC(code, name); |
| 845 | break; |
| 846 | case PROTOTYPE_FAILURE: |
| 847 | case MONOMORPHIC: |
| 848 | case POLYMORPHIC: |
| 849 | if (!target()->is_keyed_stub() || state() == PROTOTYPE_FAILURE) { |
| 850 | if (UpdatePolymorphicIC(name, code)) break; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 851 | // For keyed stubs, we can't know whether old handlers were for the |
| 852 | // same key. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 853 | CopyICToMegamorphicCache(name); |
| 854 | } |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 855 | if (UseVector()) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 856 | ConfigureVectorState(MEGAMORPHIC); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 857 | } else { |
| 858 | set_target(*megamorphic_stub()); |
| 859 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 860 | // Fall through. |
| 861 | case MEGAMORPHIC: |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 862 | UpdateMegamorphicCache(*receiver_map(), *name, *code); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 863 | // Indicate that we've handled this case. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 864 | if (UseVector()) { |
| 865 | vector_set_ = true; |
| 866 | } else { |
| 867 | target_set_ = true; |
| 868 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 869 | break; |
| 870 | case DEBUG_STUB: |
| 871 | break; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 872 | case GENERIC: |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 873 | UNREACHABLE(); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 874 | break; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 875 | } |
| 876 | } |
| 877 | |
| 878 | |
| 879 | Handle<Code> LoadIC::initialize_stub(Isolate* isolate, |
| 880 | ExtraICState extra_state) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 881 | return LoadICTrampolineStub(isolate, LoadICState(extra_state)).GetCode(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 882 | } |
| 883 | |
| 884 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 885 | Handle<Code> LoadIC::initialize_stub_in_optimized_code( |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 886 | Isolate* isolate, ExtraICState extra_state, State initialization_state) { |
| 887 | return LoadICStub(isolate, LoadICState(extra_state)).GetCode(); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 888 | } |
| 889 | |
| 890 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 891 | Handle<Code> KeyedLoadIC::initialize_stub(Isolate* isolate, |
| 892 | ExtraICState extra_state) { |
| 893 | return KeyedLoadICTrampolineStub(isolate, LoadICState(extra_state)).GetCode(); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 894 | } |
| 895 | |
| 896 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 897 | Handle<Code> KeyedLoadIC::initialize_stub_in_optimized_code( |
| 898 | Isolate* isolate, State initialization_state, ExtraICState extra_state) { |
| 899 | if (initialization_state != MEGAMORPHIC) { |
| 900 | return KeyedLoadICStub(isolate, LoadICState(extra_state)).GetCode(); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 901 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 902 | return is_strong(LoadICState::GetLanguageMode(extra_state)) |
| 903 | ? isolate->builtins()->KeyedLoadIC_Megamorphic_Strong() |
| 904 | : isolate->builtins()->KeyedLoadIC_Megamorphic(); |
| 905 | } |
| 906 | |
| 907 | |
| 908 | static Handle<Code> KeyedStoreICInitializeStubHelper( |
| 909 | Isolate* isolate, LanguageMode language_mode, |
| 910 | InlineCacheState initialization_state) { |
| 911 | switch (initialization_state) { |
| 912 | case UNINITIALIZED: |
| 913 | return is_strict(language_mode) |
| 914 | ? isolate->builtins()->KeyedStoreIC_Initialize_Strict() |
| 915 | : isolate->builtins()->KeyedStoreIC_Initialize(); |
| 916 | case PREMONOMORPHIC: |
| 917 | return is_strict(language_mode) |
| 918 | ? isolate->builtins()->KeyedStoreIC_PreMonomorphic_Strict() |
| 919 | : isolate->builtins()->KeyedStoreIC_PreMonomorphic(); |
| 920 | case MEGAMORPHIC: |
| 921 | return is_strict(language_mode) |
| 922 | ? isolate->builtins()->KeyedStoreIC_Megamorphic_Strict() |
| 923 | : isolate->builtins()->KeyedStoreIC_Megamorphic(); |
| 924 | default: |
| 925 | UNREACHABLE(); |
| 926 | } |
| 927 | return Handle<Code>(); |
| 928 | } |
| 929 | |
| 930 | |
| 931 | Handle<Code> KeyedStoreIC::initialize_stub(Isolate* isolate, |
| 932 | LanguageMode language_mode, |
| 933 | State initialization_state) { |
| 934 | if (initialization_state != MEGAMORPHIC) { |
| 935 | VectorKeyedStoreICTrampolineStub stub(isolate, StoreICState(language_mode)); |
| 936 | return stub.GetCode(); |
| 937 | } |
| 938 | |
| 939 | return KeyedStoreICInitializeStubHelper(isolate, language_mode, |
| 940 | initialization_state); |
| 941 | } |
| 942 | |
| 943 | |
| 944 | Handle<Code> KeyedStoreIC::initialize_stub_in_optimized_code( |
| 945 | Isolate* isolate, LanguageMode language_mode, State initialization_state) { |
| 946 | if (initialization_state != MEGAMORPHIC) { |
| 947 | VectorKeyedStoreICStub stub(isolate, StoreICState(language_mode)); |
| 948 | return stub.GetCode(); |
| 949 | } |
| 950 | |
| 951 | return KeyedStoreICInitializeStubHelper(isolate, language_mode, |
| 952 | initialization_state); |
| 953 | } |
| 954 | |
| 955 | |
| 956 | Handle<Code> KeyedStoreIC::ChooseMegamorphicStub(Isolate* isolate, |
| 957 | ExtraICState extra_state) { |
| 958 | LanguageMode mode = StoreICState::GetLanguageMode(extra_state); |
| 959 | return KeyedStoreICInitializeStubHelper(isolate, mode, MEGAMORPHIC); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 960 | } |
| 961 | |
| 962 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 963 | Handle<Code> LoadIC::megamorphic_stub() { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 964 | DCHECK_EQ(Code::KEYED_LOAD_IC, kind()); |
| 965 | return KeyedLoadIC::ChooseMegamorphicStub(isolate(), extra_ic_state()); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 966 | } |
| 967 | |
| 968 | |
| 969 | Handle<Code> LoadIC::SimpleFieldLoad(FieldIndex index) { |
| 970 | LoadFieldStub stub(isolate(), index); |
| 971 | return stub.GetCode(); |
| 972 | } |
| 973 | |
| 974 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 975 | bool IsCompatibleReceiver(LookupIterator* lookup, Handle<Map> receiver_map) { |
| 976 | DCHECK(lookup->state() == LookupIterator::ACCESSOR); |
| 977 | Isolate* isolate = lookup->isolate(); |
| 978 | Handle<Object> accessors = lookup->GetAccessors(); |
| 979 | if (accessors->IsExecutableAccessorInfo()) { |
| 980 | Handle<ExecutableAccessorInfo> info = |
| 981 | Handle<ExecutableAccessorInfo>::cast(accessors); |
| 982 | if (info->getter() != NULL && |
| 983 | !ExecutableAccessorInfo::IsCompatibleReceiverMap(isolate, info, |
| 984 | receiver_map)) { |
| 985 | return false; |
| 986 | } |
| 987 | } else if (accessors->IsAccessorPair()) { |
| 988 | Handle<Object> getter(Handle<AccessorPair>::cast(accessors)->getter(), |
| 989 | isolate); |
| 990 | Handle<JSObject> holder = lookup->GetHolder<JSObject>(); |
| 991 | Handle<Object> receiver = lookup->GetReceiver(); |
| 992 | if (getter->IsJSFunction() && holder->HasFastProperties()) { |
| 993 | Handle<JSFunction> function = Handle<JSFunction>::cast(getter); |
| 994 | if (receiver->IsJSObject() || function->shared()->IsBuiltin() || |
| 995 | !is_sloppy(function->shared()->language_mode())) { |
| 996 | CallOptimization call_optimization(function); |
| 997 | if (call_optimization.is_simple_api_call() && |
| 998 | !call_optimization.IsCompatibleReceiverMap(receiver_map, holder)) { |
| 999 | return false; |
| 1000 | } |
| 1001 | } |
| 1002 | } |
| 1003 | } |
| 1004 | return true; |
| 1005 | } |
| 1006 | |
| 1007 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1008 | void LoadIC::UpdateCaches(LookupIterator* lookup) { |
| 1009 | if (state() == UNINITIALIZED) { |
| 1010 | // This is the first time we execute this inline cache. Set the target to |
| 1011 | // the pre monomorphic stub to delay setting the monomorphic state. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1012 | ConfigureVectorState(PREMONOMORPHIC); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1013 | TRACE_IC("LoadIC", lookup->name()); |
| 1014 | return; |
| 1015 | } |
| 1016 | |
| 1017 | Handle<Code> code; |
| 1018 | if (lookup->state() == LookupIterator::JSPROXY || |
| 1019 | lookup->state() == LookupIterator::ACCESS_CHECK) { |
| 1020 | code = slow_stub(); |
| 1021 | } else if (!lookup->IsFound()) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1022 | if (kind() == Code::LOAD_IC && !is_strong(language_mode())) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1023 | code = NamedLoadHandlerCompiler::ComputeLoadNonexistent(lookup->name(), |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1024 | receiver_map()); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1025 | // TODO(jkummerow/verwaest): Introduce a builtin that handles this case. |
| 1026 | if (code.is_null()) code = slow_stub(); |
| 1027 | } else { |
| 1028 | code = slow_stub(); |
| 1029 | } |
| 1030 | } else { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1031 | if (lookup->state() == LookupIterator::ACCESSOR) { |
| 1032 | if (!IsCompatibleReceiver(lookup, receiver_map())) { |
| 1033 | TRACE_GENERIC_IC(isolate(), "LoadIC", "incompatible receiver type"); |
| 1034 | code = slow_stub(); |
| 1035 | } |
| 1036 | } else if (lookup->state() == LookupIterator::INTERCEPTOR) { |
| 1037 | // Perform a lookup behind the interceptor. Copy the LookupIterator since |
| 1038 | // the original iterator will be used to fetch the value. |
| 1039 | LookupIterator it = *lookup; |
| 1040 | it.Next(); |
| 1041 | LookupForRead(&it); |
| 1042 | if (it.state() == LookupIterator::ACCESSOR && |
| 1043 | !IsCompatibleReceiver(&it, receiver_map())) { |
| 1044 | TRACE_GENERIC_IC(isolate(), "LoadIC", "incompatible receiver type"); |
| 1045 | code = slow_stub(); |
| 1046 | } |
| 1047 | } |
| 1048 | if (code.is_null()) code = ComputeHandler(lookup); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1049 | } |
| 1050 | |
| 1051 | PatchCache(lookup->name(), code); |
| 1052 | TRACE_IC("LoadIC", lookup->name()); |
| 1053 | } |
| 1054 | |
| 1055 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1056 | void IC::UpdateMegamorphicCache(Map* map, Name* name, Code* code) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1057 | isolate()->stub_cache()->Set(name, map, code); |
| 1058 | } |
| 1059 | |
| 1060 | |
| 1061 | Handle<Code> IC::ComputeHandler(LookupIterator* lookup, Handle<Object> value) { |
| 1062 | bool receiver_is_holder = |
| 1063 | lookup->GetReceiver().is_identical_to(lookup->GetHolder<JSObject>()); |
| 1064 | CacheHolderFlag flag; |
| 1065 | Handle<Map> stub_holder_map = IC::GetHandlerCacheHolder( |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1066 | receiver_map(), receiver_is_holder, isolate(), &flag); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1067 | |
| 1068 | Handle<Code> code = PropertyHandlerCompiler::Find( |
| 1069 | lookup->name(), stub_holder_map, kind(), flag, |
| 1070 | lookup->is_dictionary_holder() ? Code::NORMAL : Code::FAST); |
| 1071 | // Use the cached value if it exists, and if it is different from the |
| 1072 | // handler that just missed. |
| 1073 | if (!code.is_null()) { |
| 1074 | if (!maybe_handler_.is_null() && |
| 1075 | !maybe_handler_.ToHandleChecked().is_identical_to(code)) { |
| 1076 | return code; |
| 1077 | } |
| 1078 | if (maybe_handler_.is_null()) { |
| 1079 | // maybe_handler_ is only populated for MONOMORPHIC and POLYMORPHIC ICs. |
| 1080 | // In MEGAMORPHIC case, check if the handler in the megamorphic stub |
| 1081 | // cache (which just missed) is different from the cached handler. |
| 1082 | if (state() == MEGAMORPHIC && lookup->GetReceiver()->IsHeapObject()) { |
| 1083 | Map* map = Handle<HeapObject>::cast(lookup->GetReceiver())->map(); |
| 1084 | Code* megamorphic_cached_code = |
| 1085 | isolate()->stub_cache()->Get(*lookup->name(), map, code->flags()); |
| 1086 | if (megamorphic_cached_code != *code) return code; |
| 1087 | } else { |
| 1088 | return code; |
| 1089 | } |
| 1090 | } |
| 1091 | } |
| 1092 | |
| 1093 | code = CompileHandler(lookup, value, flag); |
| 1094 | DCHECK(code->is_handler()); |
| 1095 | |
| 1096 | // TODO(mvstanton): we'd only like to cache code on the map when it's custom |
| 1097 | // code compiled for this map, otherwise it's already cached in the global |
| 1098 | // code |
| 1099 | // cache. We are also guarding against installing code with flags that don't |
| 1100 | // match the desired CacheHolderFlag computed above, which would lead to |
| 1101 | // invalid lookups later. |
| 1102 | if (code->type() != Code::NORMAL && |
| 1103 | Code::ExtractCacheHolderFromFlags(code->flags()) == flag) { |
| 1104 | Map::UpdateCodeCache(stub_holder_map, lookup->name(), code); |
| 1105 | } |
| 1106 | |
| 1107 | return code; |
| 1108 | } |
| 1109 | |
| 1110 | |
| 1111 | Handle<Code> LoadIC::CompileHandler(LookupIterator* lookup, |
| 1112 | Handle<Object> unused, |
| 1113 | CacheHolderFlag cache_holder) { |
| 1114 | Handle<Object> receiver = lookup->GetReceiver(); |
| 1115 | if (receiver->IsString() && |
| 1116 | Name::Equals(isolate()->factory()->length_string(), lookup->name())) { |
| 1117 | FieldIndex index = FieldIndex::ForInObjectOffset(String::kLengthOffset); |
| 1118 | return SimpleFieldLoad(index); |
| 1119 | } |
| 1120 | |
| 1121 | if (receiver->IsStringWrapper() && |
| 1122 | Name::Equals(isolate()->factory()->length_string(), lookup->name())) { |
| 1123 | StringLengthStub string_length_stub(isolate()); |
| 1124 | return string_length_stub.GetCode(); |
| 1125 | } |
| 1126 | |
| 1127 | // Use specialized code for getting prototype of functions. |
| 1128 | if (receiver->IsJSFunction() && |
| 1129 | Name::Equals(isolate()->factory()->prototype_string(), lookup->name()) && |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1130 | receiver->IsConstructor() && |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1131 | !Handle<JSFunction>::cast(receiver) |
| 1132 | ->map() |
| 1133 | ->has_non_instance_prototype()) { |
| 1134 | Handle<Code> stub; |
| 1135 | FunctionPrototypeStub function_prototype_stub(isolate()); |
| 1136 | return function_prototype_stub.GetCode(); |
| 1137 | } |
| 1138 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1139 | Handle<Map> map = receiver_map(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1140 | Handle<JSObject> holder = lookup->GetHolder<JSObject>(); |
| 1141 | bool receiver_is_holder = receiver.is_identical_to(holder); |
| 1142 | switch (lookup->state()) { |
| 1143 | case LookupIterator::INTERCEPTOR: { |
| 1144 | DCHECK(!holder->GetNamedInterceptor()->getter()->IsUndefined()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1145 | NamedLoadHandlerCompiler compiler(isolate(), map, holder, cache_holder); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1146 | // Perform a lookup behind the interceptor. Copy the LookupIterator since |
| 1147 | // the original iterator will be used to fetch the value. |
| 1148 | LookupIterator it = *lookup; |
| 1149 | it.Next(); |
| 1150 | LookupForRead(&it); |
| 1151 | return compiler.CompileLoadInterceptor(&it); |
| 1152 | } |
| 1153 | |
| 1154 | case LookupIterator::ACCESSOR: { |
| 1155 | // Use simple field loads for some well-known callback properties. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1156 | // The method will only return true for absolute truths based on the |
| 1157 | // receiver maps. |
| 1158 | int object_offset; |
| 1159 | if (Accessors::IsJSObjectFieldAccessor(map, lookup->name(), |
| 1160 | &object_offset)) { |
| 1161 | FieldIndex index = FieldIndex::ForInObjectOffset(object_offset, *map); |
| 1162 | return SimpleFieldLoad(index); |
| 1163 | } |
| 1164 | if (Accessors::IsJSArrayBufferViewFieldAccessor(map, lookup->name(), |
| 1165 | &object_offset)) { |
| 1166 | FieldIndex index = FieldIndex::ForInObjectOffset(object_offset, *map); |
| 1167 | ArrayBufferViewLoadFieldStub stub(isolate(), index); |
| 1168 | return stub.GetCode(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1169 | } |
| 1170 | |
| 1171 | Handle<Object> accessors = lookup->GetAccessors(); |
| 1172 | if (accessors->IsExecutableAccessorInfo()) { |
| 1173 | Handle<ExecutableAccessorInfo> info = |
| 1174 | Handle<ExecutableAccessorInfo>::cast(accessors); |
| 1175 | if (v8::ToCData<Address>(info->getter()) == 0) break; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1176 | if (!ExecutableAccessorInfo::IsCompatibleReceiverMap(isolate(), info, |
| 1177 | map)) { |
| 1178 | // This case should be already handled in LoadIC::UpdateCaches. |
| 1179 | UNREACHABLE(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1180 | break; |
| 1181 | } |
| 1182 | if (!holder->HasFastProperties()) break; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1183 | NamedLoadHandlerCompiler compiler(isolate(), map, holder, cache_holder); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1184 | return compiler.CompileLoadCallback(lookup->name(), info); |
| 1185 | } |
| 1186 | if (accessors->IsAccessorPair()) { |
| 1187 | Handle<Object> getter(Handle<AccessorPair>::cast(accessors)->getter(), |
| 1188 | isolate()); |
| 1189 | if (!getter->IsJSFunction()) break; |
| 1190 | if (!holder->HasFastProperties()) break; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1191 | // When debugging we need to go the slow path to flood the accessor. |
| 1192 | if (GetSharedFunctionInfo()->HasDebugInfo()) break; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1193 | Handle<JSFunction> function = Handle<JSFunction>::cast(getter); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1194 | if (!receiver->IsJSObject() && !function->shared()->IsBuiltin() && |
| 1195 | is_sloppy(function->shared()->language_mode())) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1196 | // Calling sloppy non-builtins with a value as the receiver |
| 1197 | // requires boxing. |
| 1198 | break; |
| 1199 | } |
| 1200 | CallOptimization call_optimization(function); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1201 | NamedLoadHandlerCompiler compiler(isolate(), map, holder, cache_holder); |
| 1202 | if (call_optimization.is_simple_api_call()) { |
| 1203 | if (call_optimization.IsCompatibleReceiver(receiver, holder)) { |
| 1204 | return compiler.CompileLoadCallback( |
| 1205 | lookup->name(), call_optimization, lookup->GetAccessorIndex()); |
| 1206 | } else { |
| 1207 | // This case should be already handled in LoadIC::UpdateCaches. |
| 1208 | UNREACHABLE(); |
| 1209 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1210 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1211 | int expected_arguments = |
| 1212 | function->shared()->internal_formal_parameter_count(); |
| 1213 | return compiler.CompileLoadViaGetter( |
| 1214 | lookup->name(), lookup->GetAccessorIndex(), expected_arguments); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1215 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1216 | break; |
| 1217 | } |
| 1218 | |
| 1219 | case LookupIterator::DATA: { |
| 1220 | if (lookup->is_dictionary_holder()) { |
| 1221 | if (kind() != Code::LOAD_IC) break; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1222 | if (holder->IsJSGlobalObject()) { |
| 1223 | NamedLoadHandlerCompiler compiler(isolate(), map, holder, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1224 | cache_holder); |
| 1225 | Handle<PropertyCell> cell = lookup->GetPropertyCell(); |
| 1226 | Handle<Code> code = compiler.CompileLoadGlobal( |
| 1227 | cell, lookup->name(), lookup->IsConfigurable()); |
| 1228 | // TODO(verwaest): Move caching of these NORMAL stubs outside as well. |
| 1229 | CacheHolderFlag flag; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1230 | Handle<Map> stub_holder_map = |
| 1231 | GetHandlerCacheHolder(map, receiver_is_holder, isolate(), &flag); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1232 | Map::UpdateCodeCache(stub_holder_map, lookup->name(), code); |
| 1233 | return code; |
| 1234 | } |
| 1235 | // There is only one shared stub for loading normalized |
| 1236 | // properties. It does not traverse the prototype chain, so the |
| 1237 | // property must be found in the object for the stub to be |
| 1238 | // applicable. |
| 1239 | if (!receiver_is_holder) break; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1240 | return is_strong(language_mode()) |
| 1241 | ? isolate()->builtins()->LoadIC_Normal_Strong() |
| 1242 | : isolate()->builtins()->LoadIC_Normal(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1243 | } |
| 1244 | |
| 1245 | // -------------- Fields -------------- |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1246 | if (lookup->property_details().type() == DATA) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1247 | FieldIndex field = lookup->GetFieldIndex(); |
| 1248 | if (receiver_is_holder) { |
| 1249 | return SimpleFieldLoad(field); |
| 1250 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1251 | NamedLoadHandlerCompiler compiler(isolate(), map, holder, cache_holder); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1252 | return compiler.CompileLoadField(lookup->name(), field); |
| 1253 | } |
| 1254 | |
| 1255 | // -------------- Constant properties -------------- |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1256 | DCHECK(lookup->property_details().type() == DATA_CONSTANT); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1257 | if (receiver_is_holder) { |
| 1258 | LoadConstantStub stub(isolate(), lookup->GetConstantIndex()); |
| 1259 | return stub.GetCode(); |
| 1260 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1261 | NamedLoadHandlerCompiler compiler(isolate(), map, holder, cache_holder); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1262 | return compiler.CompileLoadConstant(lookup->name(), |
| 1263 | lookup->GetConstantIndex()); |
| 1264 | } |
| 1265 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1266 | case LookupIterator::INTEGER_INDEXED_EXOTIC: |
| 1267 | return slow_stub(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1268 | case LookupIterator::ACCESS_CHECK: |
| 1269 | case LookupIterator::JSPROXY: |
| 1270 | case LookupIterator::NOT_FOUND: |
| 1271 | case LookupIterator::TRANSITION: |
| 1272 | UNREACHABLE(); |
| 1273 | } |
| 1274 | |
| 1275 | return slow_stub(); |
| 1276 | } |
| 1277 | |
| 1278 | |
| 1279 | static Handle<Object> TryConvertKey(Handle<Object> key, Isolate* isolate) { |
| 1280 | // This helper implements a few common fast cases for converting |
| 1281 | // non-smi keys of keyed loads/stores to a smi or a string. |
| 1282 | if (key->IsHeapNumber()) { |
| 1283 | double value = Handle<HeapNumber>::cast(key)->value(); |
| 1284 | if (std::isnan(value)) { |
| 1285 | key = isolate->factory()->nan_string(); |
| 1286 | } else { |
| 1287 | int int_value = FastD2I(value); |
| 1288 | if (value == int_value && Smi::IsValid(int_value)) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1289 | key = handle(Smi::FromInt(int_value), isolate); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1290 | } |
| 1291 | } |
| 1292 | } else if (key->IsUndefined()) { |
| 1293 | key = isolate->factory()->undefined_string(); |
| 1294 | } |
| 1295 | return key; |
| 1296 | } |
| 1297 | |
| 1298 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1299 | Handle<Code> KeyedLoadIC::LoadElementStub(Handle<HeapObject> receiver) { |
| 1300 | Handle<Code> null_handle; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1301 | Handle<Map> receiver_map(receiver->map(), isolate()); |
| 1302 | MapHandleList target_receiver_maps; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1303 | TargetMaps(&target_receiver_maps); |
| 1304 | |
| 1305 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1306 | if (target_receiver_maps.length() == 0) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1307 | Handle<Code> handler = |
| 1308 | PropertyICCompiler::ComputeKeyedLoadMonomorphicHandler( |
| 1309 | receiver_map, extra_ic_state()); |
| 1310 | ConfigureVectorState(Handle<Name>::null(), receiver_map, handler); |
| 1311 | return null_handle; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1312 | } |
| 1313 | |
| 1314 | // The first time a receiver is seen that is a transitioned version of the |
| 1315 | // previous monomorphic receiver type, assume the new ElementsKind is the |
| 1316 | // monomorphic type. This benefits global arrays that only transition |
| 1317 | // once, and all call sites accessing them are faster if they remain |
| 1318 | // monomorphic. If this optimistic assumption is not true, the IC will |
| 1319 | // miss again and it will become polymorphic and support both the |
| 1320 | // untransitioned and transitioned maps. |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1321 | if (state() == MONOMORPHIC && !receiver->IsString() && |
| 1322 | IsMoreGeneralElementsKindTransition( |
| 1323 | target_receiver_maps.at(0)->elements_kind(), |
| 1324 | Handle<JSObject>::cast(receiver)->GetElementsKind())) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1325 | Handle<Code> handler = |
| 1326 | PropertyICCompiler::ComputeKeyedLoadMonomorphicHandler( |
| 1327 | receiver_map, extra_ic_state()); |
| 1328 | ConfigureVectorState(Handle<Name>::null(), receiver_map, handler); |
| 1329 | return null_handle; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1330 | } |
| 1331 | |
| 1332 | DCHECK(state() != GENERIC); |
| 1333 | |
| 1334 | // Determine the list of receiver maps that this call site has seen, |
| 1335 | // adding the map that was just encountered. |
| 1336 | if (!AddOneReceiverMapIfMissing(&target_receiver_maps, receiver_map)) { |
| 1337 | // If the miss wasn't due to an unseen map, a polymorphic stub |
| 1338 | // won't help, use the generic stub. |
| 1339 | TRACE_GENERIC_IC(isolate(), "KeyedLoadIC", "same map added twice"); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1340 | return megamorphic_stub(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1341 | } |
| 1342 | |
| 1343 | // If the maximum number of receiver maps has been exceeded, use the generic |
| 1344 | // version of the IC. |
| 1345 | if (target_receiver_maps.length() > kMaxKeyedPolymorphism) { |
| 1346 | TRACE_GENERIC_IC(isolate(), "KeyedLoadIC", "max polymorph exceeded"); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1347 | return megamorphic_stub(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1348 | } |
| 1349 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1350 | CodeHandleList handlers(target_receiver_maps.length()); |
| 1351 | ElementHandlerCompiler compiler(isolate()); |
| 1352 | compiler.CompileElementHandlers(&target_receiver_maps, &handlers, |
| 1353 | language_mode()); |
| 1354 | ConfigureVectorState(Handle<Name>::null(), &target_receiver_maps, &handlers); |
| 1355 | return null_handle; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1356 | } |
| 1357 | |
| 1358 | |
| 1359 | MaybeHandle<Object> KeyedLoadIC::Load(Handle<Object> object, |
| 1360 | Handle<Object> key) { |
| 1361 | if (MigrateDeprecated(object)) { |
| 1362 | Handle<Object> result; |
| 1363 | ASSIGN_RETURN_ON_EXCEPTION( |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1364 | isolate(), result, |
| 1365 | Runtime::GetObjectProperty(isolate(), object, key, language_mode()), |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1366 | Object); |
| 1367 | return result; |
| 1368 | } |
| 1369 | |
| 1370 | Handle<Object> load_handle; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1371 | Handle<Code> stub = megamorphic_stub(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1372 | |
| 1373 | // Check for non-string values that can be converted into an |
| 1374 | // internalized string directly or is representable as a smi. |
| 1375 | key = TryConvertKey(key, isolate()); |
| 1376 | |
| 1377 | if (key->IsInternalizedString() || key->IsSymbol()) { |
| 1378 | ASSIGN_RETURN_ON_EXCEPTION(isolate(), load_handle, |
| 1379 | LoadIC::Load(object, Handle<Name>::cast(key)), |
| 1380 | Object); |
| 1381 | } else if (FLAG_use_ic && !object->IsAccessCheckNeeded()) { |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1382 | if (object->IsJSObject() || (object->IsString() && key->IsNumber())) { |
| 1383 | Handle<HeapObject> receiver = Handle<HeapObject>::cast(object); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1384 | if (object->IsString() || key->IsSmi()) stub = LoadElementStub(receiver); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1385 | } |
| 1386 | } |
| 1387 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1388 | DCHECK(UseVector()); |
| 1389 | if (!is_vector_set() || stub.is_null()) { |
| 1390 | Code* generic = *megamorphic_stub(); |
| 1391 | if (!stub.is_null() && *stub == generic) { |
| 1392 | ConfigureVectorState(MEGAMORPHIC); |
| 1393 | TRACE_GENERIC_IC(isolate(), "KeyedLoadIC", "set generic"); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1394 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1395 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1396 | TRACE_IC("LoadIC", key); |
| 1397 | } |
| 1398 | |
| 1399 | if (!load_handle.is_null()) return load_handle; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1400 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1401 | Handle<Object> result; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1402 | ASSIGN_RETURN_ON_EXCEPTION( |
| 1403 | isolate(), result, |
| 1404 | Runtime::GetObjectProperty(isolate(), object, key, language_mode()), |
| 1405 | Object); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1406 | return result; |
| 1407 | } |
| 1408 | |
| 1409 | |
| 1410 | bool StoreIC::LookupForWrite(LookupIterator* it, Handle<Object> value, |
| 1411 | JSReceiver::StoreFromKeyed store_mode) { |
| 1412 | // Disable ICs for non-JSObjects for now. |
| 1413 | Handle<Object> receiver = it->GetReceiver(); |
| 1414 | if (!receiver->IsJSObject()) return false; |
| 1415 | DCHECK(!Handle<JSObject>::cast(receiver)->map()->is_deprecated()); |
| 1416 | |
| 1417 | for (; it->IsFound(); it->Next()) { |
| 1418 | switch (it->state()) { |
| 1419 | case LookupIterator::NOT_FOUND: |
| 1420 | case LookupIterator::TRANSITION: |
| 1421 | UNREACHABLE(); |
| 1422 | case LookupIterator::JSPROXY: |
| 1423 | return false; |
| 1424 | case LookupIterator::INTERCEPTOR: { |
| 1425 | Handle<JSObject> holder = it->GetHolder<JSObject>(); |
| 1426 | InterceptorInfo* info = holder->GetNamedInterceptor(); |
| 1427 | if (it->HolderIsReceiverOrHiddenPrototype()) { |
| 1428 | if (!info->setter()->IsUndefined()) return true; |
| 1429 | } else if (!info->getter()->IsUndefined() || |
| 1430 | !info->query()->IsUndefined()) { |
| 1431 | return false; |
| 1432 | } |
| 1433 | break; |
| 1434 | } |
| 1435 | case LookupIterator::ACCESS_CHECK: |
| 1436 | if (it->GetHolder<JSObject>()->IsAccessCheckNeeded()) return false; |
| 1437 | break; |
| 1438 | case LookupIterator::ACCESSOR: |
| 1439 | return !it->IsReadOnly(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1440 | case LookupIterator::INTEGER_INDEXED_EXOTIC: |
| 1441 | return false; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1442 | case LookupIterator::DATA: { |
| 1443 | if (it->IsReadOnly()) return false; |
| 1444 | Handle<JSObject> holder = it->GetHolder<JSObject>(); |
| 1445 | if (receiver.is_identical_to(holder)) { |
| 1446 | it->PrepareForDataProperty(value); |
| 1447 | // The previous receiver map might just have been deprecated, |
| 1448 | // so reload it. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1449 | update_receiver_map(receiver); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1450 | return true; |
| 1451 | } |
| 1452 | |
| 1453 | // Receiver != holder. |
| 1454 | PrototypeIterator iter(it->isolate(), receiver); |
| 1455 | if (receiver->IsJSGlobalProxy()) { |
| 1456 | return it->GetHolder<Object>().is_identical_to( |
| 1457 | PrototypeIterator::GetCurrent(iter)); |
| 1458 | } |
| 1459 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1460 | if (it->HolderIsReceiverOrHiddenPrototype()) return false; |
| 1461 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1462 | it->PrepareTransitionToDataProperty(value, NONE, store_mode); |
| 1463 | return it->IsCacheableTransition(); |
| 1464 | } |
| 1465 | } |
| 1466 | } |
| 1467 | |
| 1468 | it->PrepareTransitionToDataProperty(value, NONE, store_mode); |
| 1469 | return it->IsCacheableTransition(); |
| 1470 | } |
| 1471 | |
| 1472 | |
| 1473 | MaybeHandle<Object> StoreIC::Store(Handle<Object> object, Handle<Name> name, |
| 1474 | Handle<Object> value, |
| 1475 | JSReceiver::StoreFromKeyed store_mode) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1476 | // Check if the name is trivially convertible to an index and set the element. |
| 1477 | uint32_t index; |
| 1478 | if (kind() == Code::KEYED_STORE_IC && name->AsArrayIndex(&index)) { |
| 1479 | // Rewrite to the generic keyed store stub. |
| 1480 | if (FLAG_use_ic) { |
| 1481 | if (UseVector()) { |
| 1482 | ConfigureVectorState(MEGAMORPHIC); |
| 1483 | } else if (!AddressIsDeoptimizedCode()) { |
| 1484 | set_target(*megamorphic_stub()); |
| 1485 | } |
| 1486 | TRACE_IC("StoreIC", name); |
| 1487 | TRACE_GENERIC_IC(isolate(), "StoreIC", "name as array index"); |
| 1488 | } |
| 1489 | Handle<Object> result; |
| 1490 | ASSIGN_RETURN_ON_EXCEPTION( |
| 1491 | isolate(), result, |
| 1492 | Object::SetElement(isolate(), object, index, value, language_mode()), |
| 1493 | Object); |
| 1494 | return result; |
| 1495 | } |
| 1496 | |
| 1497 | if (object->IsJSGlobalObject() && name->IsString()) { |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1498 | // Look up in script context table. |
| 1499 | Handle<String> str_name = Handle<String>::cast(name); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1500 | Handle<JSGlobalObject> global = Handle<JSGlobalObject>::cast(object); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1501 | Handle<ScriptContextTable> script_contexts( |
| 1502 | global->native_context()->script_context_table()); |
| 1503 | |
| 1504 | ScriptContextTable::LookupResult lookup_result; |
| 1505 | if (ScriptContextTable::Lookup(script_contexts, str_name, &lookup_result)) { |
| 1506 | Handle<Context> script_context = ScriptContextTable::GetContext( |
| 1507 | script_contexts, lookup_result.context_index); |
| 1508 | if (lookup_result.mode == CONST) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1509 | return TypeError(MessageTemplate::kConstAssign, object, name); |
| 1510 | } |
| 1511 | |
| 1512 | Handle<Object> previous_value = |
| 1513 | FixedArray::get(script_context, lookup_result.slot_index); |
| 1514 | |
| 1515 | if (*previous_value == *isolate()->factory()->the_hole_value()) { |
| 1516 | // Do not install stubs and stay pre-monomorphic for |
| 1517 | // uninitialized accesses. |
| 1518 | return ReferenceError(name); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1519 | } |
| 1520 | |
| 1521 | if (FLAG_use_ic && |
| 1522 | StoreScriptContextFieldStub::Accepted(&lookup_result)) { |
| 1523 | StoreScriptContextFieldStub stub(isolate(), &lookup_result); |
| 1524 | PatchCache(name, stub.GetCode()); |
| 1525 | } |
| 1526 | |
| 1527 | script_context->set(lookup_result.slot_index, *value); |
| 1528 | return value; |
| 1529 | } |
| 1530 | } |
| 1531 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1532 | // TODO(verwaest): Let SetProperty do the migration, since storing a property |
| 1533 | // might deprecate the current map again, if value does not fit. |
| 1534 | if (MigrateDeprecated(object) || object->IsJSProxy()) { |
| 1535 | Handle<Object> result; |
| 1536 | ASSIGN_RETURN_ON_EXCEPTION( |
| 1537 | isolate(), result, |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1538 | Object::SetProperty(object, name, value, language_mode()), Object); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1539 | return result; |
| 1540 | } |
| 1541 | |
| 1542 | // If the object is undefined or null it's illegal to try to set any |
| 1543 | // properties on it; throw a TypeError in that case. |
| 1544 | if (object->IsUndefined() || object->IsNull()) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1545 | return TypeError(MessageTemplate::kNonObjectPropertyStore, object, name); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1546 | } |
| 1547 | |
| 1548 | // Observed objects are always modified through the runtime. |
| 1549 | if (object->IsHeapObject() && |
| 1550 | Handle<HeapObject>::cast(object)->map()->is_observed()) { |
| 1551 | Handle<Object> result; |
| 1552 | ASSIGN_RETURN_ON_EXCEPTION( |
| 1553 | isolate(), result, |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1554 | Object::SetProperty(object, name, value, language_mode(), store_mode), |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1555 | Object); |
| 1556 | return result; |
| 1557 | } |
| 1558 | |
| 1559 | LookupIterator it(object, name); |
| 1560 | if (FLAG_use_ic) UpdateCaches(&it, value, store_mode); |
| 1561 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1562 | MAYBE_RETURN_NULL( |
| 1563 | Object::SetProperty(&it, value, language_mode(), store_mode)); |
| 1564 | return value; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1565 | } |
| 1566 | |
| 1567 | |
| 1568 | Handle<Code> CallIC::initialize_stub(Isolate* isolate, int argc, |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1569 | ConvertReceiverMode mode) { |
| 1570 | CallICTrampolineStub stub(isolate, CallICState(argc, mode)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1571 | Handle<Code> code = stub.GetCode(); |
| 1572 | return code; |
| 1573 | } |
| 1574 | |
| 1575 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1576 | Handle<Code> CallIC::initialize_stub_in_optimized_code( |
| 1577 | Isolate* isolate, int argc, ConvertReceiverMode mode) { |
| 1578 | CallICStub stub(isolate, CallICState(argc, mode)); |
| 1579 | Handle<Code> code = stub.GetCode(); |
| 1580 | return code; |
| 1581 | } |
| 1582 | |
| 1583 | |
| 1584 | static Handle<Code> StoreICInitializeStubHelper( |
| 1585 | Isolate* isolate, ExtraICState extra_state, |
| 1586 | InlineCacheState initialization_state) { |
| 1587 | Handle<Code> ic = PropertyICCompiler::ComputeStore( |
| 1588 | isolate, initialization_state, extra_state); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1589 | return ic; |
| 1590 | } |
| 1591 | |
| 1592 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1593 | Handle<Code> StoreIC::initialize_stub(Isolate* isolate, |
| 1594 | LanguageMode language_mode, |
| 1595 | State initialization_state) { |
| 1596 | DCHECK(initialization_state == UNINITIALIZED || |
| 1597 | initialization_state == PREMONOMORPHIC || |
| 1598 | initialization_state == MEGAMORPHIC); |
| 1599 | VectorStoreICTrampolineStub stub(isolate, StoreICState(language_mode)); |
| 1600 | return stub.GetCode(); |
| 1601 | } |
| 1602 | |
| 1603 | |
| 1604 | Handle<Code> StoreIC::initialize_stub_in_optimized_code( |
| 1605 | Isolate* isolate, LanguageMode language_mode, State initialization_state) { |
| 1606 | DCHECK(initialization_state == UNINITIALIZED || |
| 1607 | initialization_state == PREMONOMORPHIC || |
| 1608 | initialization_state == MEGAMORPHIC); |
| 1609 | if (initialization_state != MEGAMORPHIC) { |
| 1610 | VectorStoreICStub stub(isolate, StoreICState(language_mode)); |
| 1611 | return stub.GetCode(); |
| 1612 | } |
| 1613 | |
| 1614 | return StoreICInitializeStubHelper( |
| 1615 | isolate, ComputeExtraICState(language_mode), initialization_state); |
| 1616 | } |
| 1617 | |
| 1618 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1619 | Handle<Code> StoreIC::megamorphic_stub() { |
| 1620 | if (kind() == Code::STORE_IC) { |
| 1621 | return PropertyICCompiler::ComputeStore(isolate(), MEGAMORPHIC, |
| 1622 | extra_ic_state()); |
| 1623 | } else { |
| 1624 | DCHECK(kind() == Code::KEYED_STORE_IC); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1625 | if (is_strict(language_mode())) { |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1626 | return isolate()->builtins()->KeyedStoreIC_Megamorphic_Strict(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1627 | } else { |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1628 | return isolate()->builtins()->KeyedStoreIC_Megamorphic(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1629 | } |
| 1630 | } |
| 1631 | } |
| 1632 | |
| 1633 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1634 | Handle<Code> StoreIC::slow_stub() const { |
| 1635 | if (kind() == Code::STORE_IC) { |
| 1636 | return isolate()->builtins()->StoreIC_Slow(); |
| 1637 | } else { |
| 1638 | DCHECK(kind() == Code::KEYED_STORE_IC); |
| 1639 | return isolate()->builtins()->KeyedStoreIC_Slow(); |
| 1640 | } |
| 1641 | } |
| 1642 | |
| 1643 | |
| 1644 | Handle<Code> StoreIC::pre_monomorphic_stub(Isolate* isolate, |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1645 | LanguageMode language_mode) { |
| 1646 | ExtraICState state = ComputeExtraICState(language_mode); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1647 | return PropertyICCompiler::ComputeStore(isolate, PREMONOMORPHIC, state); |
| 1648 | } |
| 1649 | |
| 1650 | |
| 1651 | void StoreIC::UpdateCaches(LookupIterator* lookup, Handle<Object> value, |
| 1652 | JSReceiver::StoreFromKeyed store_mode) { |
| 1653 | if (state() == UNINITIALIZED) { |
| 1654 | // This is the first time we execute this inline cache. Set the target to |
| 1655 | // the pre monomorphic stub to delay setting the monomorphic state. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1656 | ConfigureVectorState(PREMONOMORPHIC); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1657 | TRACE_IC("StoreIC", lookup->name()); |
| 1658 | return; |
| 1659 | } |
| 1660 | |
| 1661 | bool use_ic = LookupForWrite(lookup, value, store_mode); |
| 1662 | if (!use_ic) { |
| 1663 | TRACE_GENERIC_IC(isolate(), "StoreIC", "LookupForWrite said 'false'"); |
| 1664 | } |
| 1665 | Handle<Code> code = use_ic ? ComputeHandler(lookup, value) : slow_stub(); |
| 1666 | |
| 1667 | PatchCache(lookup->name(), code); |
| 1668 | TRACE_IC("StoreIC", lookup->name()); |
| 1669 | } |
| 1670 | |
| 1671 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1672 | static Handle<Code> PropertyCellStoreHandler( |
| 1673 | Isolate* isolate, Handle<JSObject> receiver, Handle<JSGlobalObject> holder, |
| 1674 | Handle<Name> name, Handle<PropertyCell> cell, PropertyCellType type) { |
| 1675 | auto constant_type = Nothing<PropertyCellConstantType>(); |
| 1676 | if (type == PropertyCellType::kConstantType) { |
| 1677 | constant_type = Just(cell->GetConstantType()); |
| 1678 | } |
| 1679 | StoreGlobalStub stub(isolate, type, constant_type, |
| 1680 | receiver->IsJSGlobalProxy()); |
| 1681 | auto code = stub.GetCodeCopyFromTemplate(holder, cell); |
| 1682 | // TODO(verwaest): Move caching of these NORMAL stubs outside as well. |
| 1683 | HeapObject::UpdateMapCodeCache(receiver, name, code); |
| 1684 | return code; |
| 1685 | } |
| 1686 | |
| 1687 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1688 | Handle<Code> StoreIC::CompileHandler(LookupIterator* lookup, |
| 1689 | Handle<Object> value, |
| 1690 | CacheHolderFlag cache_holder) { |
| 1691 | DCHECK_NE(LookupIterator::JSPROXY, lookup->state()); |
| 1692 | |
| 1693 | // This is currently guaranteed by checks in StoreIC::Store. |
| 1694 | Handle<JSObject> receiver = Handle<JSObject>::cast(lookup->GetReceiver()); |
| 1695 | Handle<JSObject> holder = lookup->GetHolder<JSObject>(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1696 | DCHECK(!receiver->IsAccessCheckNeeded() || |
| 1697 | isolate()->IsInternallyUsedPropertyName(lookup->name())); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1698 | |
| 1699 | switch (lookup->state()) { |
| 1700 | case LookupIterator::TRANSITION: { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1701 | auto store_target = lookup->GetStoreTarget(); |
| 1702 | if (store_target->IsJSGlobalObject()) { |
| 1703 | // TODO(dcarney): this currently just deopts. Use the transition cell. |
| 1704 | auto cell = isolate()->factory()->NewPropertyCell(); |
| 1705 | cell->set_value(*value); |
| 1706 | auto code = PropertyCellStoreHandler( |
| 1707 | isolate(), store_target, Handle<JSGlobalObject>::cast(store_target), |
| 1708 | lookup->name(), cell, PropertyCellType::kConstant); |
| 1709 | cell->set_value(isolate()->heap()->the_hole_value()); |
| 1710 | return code; |
| 1711 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1712 | Handle<Map> transition = lookup->transition_map(); |
| 1713 | // Currently not handled by CompileStoreTransition. |
| 1714 | if (!holder->HasFastProperties()) { |
| 1715 | TRACE_GENERIC_IC(isolate(), "StoreIC", "transition from slow"); |
| 1716 | break; |
| 1717 | } |
| 1718 | |
| 1719 | DCHECK(lookup->IsCacheableTransition()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1720 | NamedStoreHandlerCompiler compiler(isolate(), receiver_map(), holder); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1721 | return compiler.CompileStoreTransition(transition, lookup->name()); |
| 1722 | } |
| 1723 | |
| 1724 | case LookupIterator::INTERCEPTOR: { |
| 1725 | DCHECK(!holder->GetNamedInterceptor()->setter()->IsUndefined()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1726 | NamedStoreHandlerCompiler compiler(isolate(), receiver_map(), holder); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1727 | return compiler.CompileStoreInterceptor(lookup->name()); |
| 1728 | } |
| 1729 | |
| 1730 | case LookupIterator::ACCESSOR: { |
| 1731 | if (!holder->HasFastProperties()) { |
| 1732 | TRACE_GENERIC_IC(isolate(), "StoreIC", "accessor on slow map"); |
| 1733 | break; |
| 1734 | } |
| 1735 | Handle<Object> accessors = lookup->GetAccessors(); |
| 1736 | if (accessors->IsExecutableAccessorInfo()) { |
| 1737 | Handle<ExecutableAccessorInfo> info = |
| 1738 | Handle<ExecutableAccessorInfo>::cast(accessors); |
| 1739 | if (v8::ToCData<Address>(info->setter()) == 0) { |
| 1740 | TRACE_GENERIC_IC(isolate(), "StoreIC", "setter == 0"); |
| 1741 | break; |
| 1742 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1743 | if (AccessorInfo::cast(*accessors)->is_special_data_property() && |
| 1744 | !lookup->HolderIsReceiverOrHiddenPrototype()) { |
| 1745 | TRACE_GENERIC_IC(isolate(), "StoreIC", |
| 1746 | "special data property in prototype chain"); |
| 1747 | break; |
| 1748 | } |
| 1749 | if (!ExecutableAccessorInfo::IsCompatibleReceiverMap(isolate(), info, |
| 1750 | receiver_map())) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1751 | TRACE_GENERIC_IC(isolate(), "StoreIC", "incompatible receiver type"); |
| 1752 | break; |
| 1753 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1754 | NamedStoreHandlerCompiler compiler(isolate(), receiver_map(), holder); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1755 | return compiler.CompileStoreCallback(receiver, lookup->name(), info); |
| 1756 | } else if (accessors->IsAccessorPair()) { |
| 1757 | Handle<Object> setter(Handle<AccessorPair>::cast(accessors)->setter(), |
| 1758 | isolate()); |
| 1759 | if (!setter->IsJSFunction()) { |
| 1760 | TRACE_GENERIC_IC(isolate(), "StoreIC", "setter not a function"); |
| 1761 | break; |
| 1762 | } |
| 1763 | Handle<JSFunction> function = Handle<JSFunction>::cast(setter); |
| 1764 | CallOptimization call_optimization(function); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1765 | NamedStoreHandlerCompiler compiler(isolate(), receiver_map(), holder); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1766 | if (call_optimization.is_simple_api_call() && |
| 1767 | call_optimization.IsCompatibleReceiver(receiver, holder)) { |
| 1768 | return compiler.CompileStoreCallback(receiver, lookup->name(), |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1769 | call_optimization, |
| 1770 | lookup->GetAccessorIndex()); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1771 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1772 | int expected_arguments = |
| 1773 | function->shared()->internal_formal_parameter_count(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1774 | return compiler.CompileStoreViaSetter(receiver, lookup->name(), |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1775 | lookup->GetAccessorIndex(), |
| 1776 | expected_arguments); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1777 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1778 | break; |
| 1779 | } |
| 1780 | |
| 1781 | case LookupIterator::DATA: { |
| 1782 | if (lookup->is_dictionary_holder()) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1783 | if (holder->IsJSGlobalObject()) { |
| 1784 | DCHECK(holder.is_identical_to(receiver) || |
| 1785 | receiver->map()->prototype() == *holder); |
| 1786 | auto cell = lookup->GetPropertyCell(); |
| 1787 | auto updated_type = PropertyCell::UpdatedType( |
| 1788 | cell, value, lookup->property_details()); |
| 1789 | auto code = PropertyCellStoreHandler( |
| 1790 | isolate(), receiver, Handle<JSGlobalObject>::cast(holder), |
| 1791 | lookup->name(), cell, updated_type); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1792 | return code; |
| 1793 | } |
| 1794 | DCHECK(holder.is_identical_to(receiver)); |
| 1795 | return isolate()->builtins()->StoreIC_Normal(); |
| 1796 | } |
| 1797 | |
| 1798 | // -------------- Fields -------------- |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1799 | if (lookup->property_details().type() == DATA) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1800 | bool use_stub = true; |
| 1801 | if (lookup->representation().IsHeapObject()) { |
| 1802 | // Only use a generic stub if no types need to be tracked. |
| 1803 | Handle<HeapType> field_type = lookup->GetFieldType(); |
| 1804 | HeapType::Iterator<Map> it = field_type->Classes(); |
| 1805 | use_stub = it.Done(); |
| 1806 | } |
| 1807 | if (use_stub) { |
| 1808 | StoreFieldStub stub(isolate(), lookup->GetFieldIndex(), |
| 1809 | lookup->representation()); |
| 1810 | return stub.GetCode(); |
| 1811 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1812 | NamedStoreHandlerCompiler compiler(isolate(), receiver_map(), holder); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1813 | return compiler.CompileStoreField(lookup); |
| 1814 | } |
| 1815 | |
| 1816 | // -------------- Constant properties -------------- |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1817 | DCHECK(lookup->property_details().type() == DATA_CONSTANT); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1818 | TRACE_GENERIC_IC(isolate(), "StoreIC", "constant property"); |
| 1819 | break; |
| 1820 | } |
| 1821 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1822 | case LookupIterator::INTEGER_INDEXED_EXOTIC: |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1823 | case LookupIterator::ACCESS_CHECK: |
| 1824 | case LookupIterator::JSPROXY: |
| 1825 | case LookupIterator::NOT_FOUND: |
| 1826 | UNREACHABLE(); |
| 1827 | } |
| 1828 | return slow_stub(); |
| 1829 | } |
| 1830 | |
| 1831 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1832 | Handle<Code> KeyedStoreIC::StoreElementStub(Handle<Map> receiver_map, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1833 | KeyedAccessStoreMode store_mode) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1834 | Handle<Code> null_handle; |
| 1835 | // Don't handle megamorphic property accesses for INTERCEPTORS or |
| 1836 | // ACCESSOR_CONSTANT |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1837 | // via megamorphic stubs, since they don't have a map in their relocation info |
| 1838 | // and so the stubs can't be harvested for the object needed for a map check. |
| 1839 | if (target()->type() != Code::NORMAL) { |
| 1840 | TRACE_GENERIC_IC(isolate(), "KeyedStoreIC", "non-NORMAL target type"); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1841 | return megamorphic_stub(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1842 | } |
| 1843 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1844 | MapHandleList target_receiver_maps; |
| 1845 | TargetMaps(&target_receiver_maps); |
| 1846 | if (target_receiver_maps.length() == 0) { |
| 1847 | Handle<Map> monomorphic_map = |
| 1848 | ComputeTransitionedMap(receiver_map, store_mode); |
| 1849 | store_mode = GetNonTransitioningStoreMode(store_mode); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1850 | Handle<Code> handler = |
| 1851 | PropertyICCompiler::ComputeKeyedStoreMonomorphicHandler( |
| 1852 | monomorphic_map, language_mode(), store_mode); |
| 1853 | ConfigureVectorState(Handle<Name>::null(), monomorphic_map, handler); |
| 1854 | return null_handle; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1855 | } |
| 1856 | |
| 1857 | // There are several special cases where an IC that is MONOMORPHIC can still |
| 1858 | // transition to a different GetNonTransitioningStoreMode IC that handles a |
| 1859 | // superset of the original IC. Handle those here if the receiver map hasn't |
| 1860 | // changed or it has transitioned to a more general kind. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1861 | KeyedAccessStoreMode old_store_mode = GetKeyedAccessStoreMode(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1862 | Handle<Map> previous_receiver_map = target_receiver_maps.at(0); |
| 1863 | if (state() == MONOMORPHIC) { |
| 1864 | Handle<Map> transitioned_receiver_map = receiver_map; |
| 1865 | if (IsTransitionStoreMode(store_mode)) { |
| 1866 | transitioned_receiver_map = |
| 1867 | ComputeTransitionedMap(receiver_map, store_mode); |
| 1868 | } |
| 1869 | if ((receiver_map.is_identical_to(previous_receiver_map) && |
| 1870 | IsTransitionStoreMode(store_mode)) || |
| 1871 | IsTransitionOfMonomorphicTarget(*previous_receiver_map, |
| 1872 | *transitioned_receiver_map)) { |
| 1873 | // If the "old" and "new" maps are in the same elements map family, or |
| 1874 | // if they at least come from the same origin for a transitioning store, |
| 1875 | // stay MONOMORPHIC and use the map for the most generic ElementsKind. |
| 1876 | store_mode = GetNonTransitioningStoreMode(store_mode); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1877 | Handle<Code> handler = |
| 1878 | PropertyICCompiler::ComputeKeyedStoreMonomorphicHandler( |
| 1879 | transitioned_receiver_map, language_mode(), store_mode); |
| 1880 | ConfigureVectorState(Handle<Name>::null(), transitioned_receiver_map, |
| 1881 | handler); |
| 1882 | return null_handle; |
| 1883 | } else if (receiver_map.is_identical_to(previous_receiver_map) && |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1884 | old_store_mode == STANDARD_STORE && |
| 1885 | (store_mode == STORE_AND_GROW_NO_TRANSITION || |
| 1886 | store_mode == STORE_NO_TRANSITION_IGNORE_OUT_OF_BOUNDS || |
| 1887 | store_mode == STORE_NO_TRANSITION_HANDLE_COW)) { |
| 1888 | // A "normal" IC that handles stores can switch to a version that can |
| 1889 | // grow at the end of the array, handle OOB accesses or copy COW arrays |
| 1890 | // and still stay MONOMORPHIC. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1891 | Handle<Code> handler = |
| 1892 | PropertyICCompiler::ComputeKeyedStoreMonomorphicHandler( |
| 1893 | receiver_map, language_mode(), store_mode); |
| 1894 | ConfigureVectorState(Handle<Name>::null(), receiver_map, handler); |
| 1895 | return null_handle; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1896 | } |
| 1897 | } |
| 1898 | |
| 1899 | DCHECK(state() != GENERIC); |
| 1900 | |
| 1901 | bool map_added = |
| 1902 | AddOneReceiverMapIfMissing(&target_receiver_maps, receiver_map); |
| 1903 | |
| 1904 | if (IsTransitionStoreMode(store_mode)) { |
| 1905 | Handle<Map> transitioned_receiver_map = |
| 1906 | ComputeTransitionedMap(receiver_map, store_mode); |
| 1907 | map_added |= AddOneReceiverMapIfMissing(&target_receiver_maps, |
| 1908 | transitioned_receiver_map); |
| 1909 | } |
| 1910 | |
| 1911 | if (!map_added) { |
| 1912 | // If the miss wasn't due to an unseen map, a polymorphic stub |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1913 | // won't help, use the megamorphic stub which can handle everything. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1914 | TRACE_GENERIC_IC(isolate(), "KeyedStoreIC", "same map added twice"); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1915 | return megamorphic_stub(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1916 | } |
| 1917 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1918 | // If the maximum number of receiver maps has been exceeded, use the |
| 1919 | // megamorphic version of the IC. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1920 | if (target_receiver_maps.length() > kMaxKeyedPolymorphism) { |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1921 | return megamorphic_stub(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1922 | } |
| 1923 | |
| 1924 | // Make sure all polymorphic handlers have the same store mode, otherwise the |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1925 | // megamorphic stub must be used. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1926 | store_mode = GetNonTransitioningStoreMode(store_mode); |
| 1927 | if (old_store_mode != STANDARD_STORE) { |
| 1928 | if (store_mode == STANDARD_STORE) { |
| 1929 | store_mode = old_store_mode; |
| 1930 | } else if (store_mode != old_store_mode) { |
| 1931 | TRACE_GENERIC_IC(isolate(), "KeyedStoreIC", "store mode mismatch"); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1932 | return megamorphic_stub(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1933 | } |
| 1934 | } |
| 1935 | |
| 1936 | // If the store mode isn't the standard mode, make sure that all polymorphic |
| 1937 | // receivers are either external arrays, or all "normal" arrays. Otherwise, |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1938 | // use the megamorphic stub. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1939 | if (store_mode != STANDARD_STORE) { |
| 1940 | int external_arrays = 0; |
| 1941 | for (int i = 0; i < target_receiver_maps.length(); ++i) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1942 | if (target_receiver_maps[i]->has_fixed_typed_array_elements()) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1943 | external_arrays++; |
| 1944 | } |
| 1945 | } |
| 1946 | if (external_arrays != 0 && |
| 1947 | external_arrays != target_receiver_maps.length()) { |
| 1948 | TRACE_GENERIC_IC(isolate(), "KeyedStoreIC", |
| 1949 | "unsupported combination of external and normal arrays"); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1950 | return megamorphic_stub(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1951 | } |
| 1952 | } |
| 1953 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1954 | MapHandleList transitioned_maps(target_receiver_maps.length()); |
| 1955 | CodeHandleList handlers(target_receiver_maps.length()); |
| 1956 | PropertyICCompiler::ComputeKeyedStorePolymorphicHandlers( |
| 1957 | &target_receiver_maps, &transitioned_maps, &handlers, store_mode, |
| 1958 | language_mode()); |
| 1959 | ConfigureVectorState(&target_receiver_maps, &transitioned_maps, &handlers); |
| 1960 | return null_handle; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1961 | } |
| 1962 | |
| 1963 | |
| 1964 | Handle<Map> KeyedStoreIC::ComputeTransitionedMap( |
| 1965 | Handle<Map> map, KeyedAccessStoreMode store_mode) { |
| 1966 | switch (store_mode) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1967 | case STORE_TRANSITION_TO_OBJECT: |
| 1968 | case STORE_AND_GROW_TRANSITION_TO_OBJECT: { |
| 1969 | ElementsKind kind = IsFastHoleyElementsKind(map->elements_kind()) |
| 1970 | ? FAST_HOLEY_ELEMENTS |
| 1971 | : FAST_ELEMENTS; |
| 1972 | return Map::TransitionElementsTo(map, kind); |
| 1973 | } |
| 1974 | case STORE_TRANSITION_TO_DOUBLE: |
| 1975 | case STORE_AND_GROW_TRANSITION_TO_DOUBLE: { |
| 1976 | ElementsKind kind = IsFastHoleyElementsKind(map->elements_kind()) |
| 1977 | ? FAST_HOLEY_DOUBLE_ELEMENTS |
| 1978 | : FAST_DOUBLE_ELEMENTS; |
| 1979 | return Map::TransitionElementsTo(map, kind); |
| 1980 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1981 | case STORE_NO_TRANSITION_IGNORE_OUT_OF_BOUNDS: |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1982 | DCHECK(map->has_fixed_typed_array_elements()); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1983 | // Fall through |
| 1984 | case STORE_NO_TRANSITION_HANDLE_COW: |
| 1985 | case STANDARD_STORE: |
| 1986 | case STORE_AND_GROW_NO_TRANSITION: |
| 1987 | return map; |
| 1988 | } |
| 1989 | UNREACHABLE(); |
| 1990 | return MaybeHandle<Map>().ToHandleChecked(); |
| 1991 | } |
| 1992 | |
| 1993 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1994 | bool IsOutOfBoundsAccess(Handle<JSObject> receiver, uint32_t index) { |
| 1995 | uint32_t length = 0; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1996 | if (receiver->IsJSArray()) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1997 | JSArray::cast(*receiver)->length()->ToArrayLength(&length); |
| 1998 | } else { |
| 1999 | length = static_cast<uint32_t>(receiver->elements()->length()); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2000 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2001 | return index >= length; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2002 | } |
| 2003 | |
| 2004 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2005 | static KeyedAccessStoreMode GetStoreMode(Handle<JSObject> receiver, |
| 2006 | uint32_t index, Handle<Object> value) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2007 | bool oob_access = IsOutOfBoundsAccess(receiver, index); |
| 2008 | // Don't consider this a growing store if the store would send the receiver to |
| 2009 | // dictionary mode. |
| 2010 | bool allow_growth = receiver->IsJSArray() && oob_access && |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2011 | !receiver->WouldConvertToSlowElements(index); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2012 | if (allow_growth) { |
| 2013 | // Handle growing array in stub if necessary. |
| 2014 | if (receiver->HasFastSmiElements()) { |
| 2015 | if (value->IsHeapNumber()) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2016 | return STORE_AND_GROW_TRANSITION_TO_DOUBLE; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2017 | } |
| 2018 | if (value->IsHeapObject()) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2019 | return STORE_AND_GROW_TRANSITION_TO_OBJECT; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2020 | } |
| 2021 | } else if (receiver->HasFastDoubleElements()) { |
| 2022 | if (!value->IsSmi() && !value->IsHeapNumber()) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2023 | return STORE_AND_GROW_TRANSITION_TO_OBJECT; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2024 | } |
| 2025 | } |
| 2026 | return STORE_AND_GROW_NO_TRANSITION; |
| 2027 | } else { |
| 2028 | // Handle only in-bounds elements accesses. |
| 2029 | if (receiver->HasFastSmiElements()) { |
| 2030 | if (value->IsHeapNumber()) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2031 | return STORE_TRANSITION_TO_DOUBLE; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2032 | } else if (value->IsHeapObject()) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2033 | return STORE_TRANSITION_TO_OBJECT; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2034 | } |
| 2035 | } else if (receiver->HasFastDoubleElements()) { |
| 2036 | if (!value->IsSmi() && !value->IsHeapNumber()) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2037 | return STORE_TRANSITION_TO_OBJECT; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2038 | } |
| 2039 | } |
| 2040 | if (!FLAG_trace_external_array_abuse && |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2041 | receiver->map()->has_fixed_typed_array_elements() && oob_access) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2042 | return STORE_NO_TRANSITION_IGNORE_OUT_OF_BOUNDS; |
| 2043 | } |
| 2044 | Heap* heap = receiver->GetHeap(); |
| 2045 | if (receiver->elements()->map() == heap->fixed_cow_array_map()) { |
| 2046 | return STORE_NO_TRANSITION_HANDLE_COW; |
| 2047 | } else { |
| 2048 | return STANDARD_STORE; |
| 2049 | } |
| 2050 | } |
| 2051 | } |
| 2052 | |
| 2053 | |
| 2054 | MaybeHandle<Object> KeyedStoreIC::Store(Handle<Object> object, |
| 2055 | Handle<Object> key, |
| 2056 | Handle<Object> value) { |
| 2057 | // TODO(verwaest): Let SetProperty do the migration, since storing a property |
| 2058 | // might deprecate the current map again, if value does not fit. |
| 2059 | if (MigrateDeprecated(object)) { |
| 2060 | Handle<Object> result; |
| 2061 | ASSIGN_RETURN_ON_EXCEPTION( |
| 2062 | isolate(), result, Runtime::SetObjectProperty(isolate(), object, key, |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2063 | value, language_mode()), |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2064 | Object); |
| 2065 | return result; |
| 2066 | } |
| 2067 | |
| 2068 | // Check for non-string values that can be converted into an |
| 2069 | // internalized string directly or is representable as a smi. |
| 2070 | key = TryConvertKey(key, isolate()); |
| 2071 | |
| 2072 | Handle<Object> store_handle; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2073 | Handle<Code> stub = megamorphic_stub(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2074 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2075 | uint32_t index; |
| 2076 | if ((key->IsInternalizedString() && |
| 2077 | !String::cast(*key)->AsArrayIndex(&index)) || |
| 2078 | key->IsSymbol()) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2079 | ASSIGN_RETURN_ON_EXCEPTION( |
| 2080 | isolate(), store_handle, |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2081 | StoreIC::Store(object, Handle<Name>::cast(key), value, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2082 | JSReceiver::MAY_BE_STORE_FROM_KEYED), |
| 2083 | Object); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2084 | if (!is_vector_set()) { |
| 2085 | ConfigureVectorState(MEGAMORPHIC); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2086 | TRACE_GENERIC_IC(isolate(), "KeyedStoreIC", |
| 2087 | "unhandled internalized string key"); |
| 2088 | TRACE_IC("StoreIC", key); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2089 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2090 | return store_handle; |
| 2091 | } |
| 2092 | |
| 2093 | bool use_ic = |
| 2094 | FLAG_use_ic && !object->IsStringWrapper() && |
| 2095 | !object->IsAccessCheckNeeded() && !object->IsJSGlobalProxy() && |
| 2096 | !(object->IsJSObject() && JSObject::cast(*object)->map()->is_observed()); |
| 2097 | if (use_ic && !object->IsSmi()) { |
| 2098 | // Don't use ICs for maps of the objects in Array's prototype chain. We |
| 2099 | // expect to be able to trap element sets to objects with those maps in |
| 2100 | // the runtime to enable optimization of element hole access. |
| 2101 | Handle<HeapObject> heap_object = Handle<HeapObject>::cast(object); |
| 2102 | if (heap_object->map()->IsMapInArrayPrototypeChain()) { |
| 2103 | TRACE_GENERIC_IC(isolate(), "KeyedStoreIC", "map in array prototype"); |
| 2104 | use_ic = false; |
| 2105 | } |
| 2106 | } |
| 2107 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2108 | Handle<Map> old_receiver_map; |
| 2109 | bool sloppy_arguments_elements = false; |
| 2110 | bool key_is_valid_index = false; |
| 2111 | KeyedAccessStoreMode store_mode = STANDARD_STORE; |
| 2112 | if (use_ic && object->IsJSObject()) { |
| 2113 | Handle<JSObject> receiver = Handle<JSObject>::cast(object); |
| 2114 | old_receiver_map = handle(receiver->map(), isolate()); |
| 2115 | sloppy_arguments_elements = |
| 2116 | !is_sloppy(language_mode()) && |
| 2117 | receiver->elements()->map() == |
| 2118 | isolate()->heap()->sloppy_arguments_elements_map(); |
| 2119 | if (!sloppy_arguments_elements) { |
| 2120 | key_is_valid_index = key->IsSmi() && Smi::cast(*key)->value() >= 0; |
| 2121 | if (key_is_valid_index) { |
| 2122 | uint32_t index = static_cast<uint32_t>(Smi::cast(*key)->value()); |
| 2123 | store_mode = GetStoreMode(receiver, index, value); |
| 2124 | } |
| 2125 | } |
| 2126 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2127 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2128 | DCHECK(store_handle.is_null()); |
| 2129 | ASSIGN_RETURN_ON_EXCEPTION(isolate(), store_handle, |
| 2130 | Runtime::SetObjectProperty(isolate(), object, key, |
| 2131 | value, language_mode()), |
| 2132 | Object); |
| 2133 | |
| 2134 | if (use_ic) { |
| 2135 | if (!old_receiver_map.is_null()) { |
| 2136 | if (sloppy_arguments_elements) { |
| 2137 | TRACE_GENERIC_IC(isolate(), "KeyedStoreIC", "arguments receiver"); |
| 2138 | } else if (key_is_valid_index) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2139 | // We should go generic if receiver isn't a dictionary, but our |
| 2140 | // prototype chain does have dictionary elements. This ensures that |
| 2141 | // other non-dictionary receivers in the polymorphic case benefit |
| 2142 | // from fast path keyed stores. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2143 | if (!old_receiver_map->DictionaryElementsInPrototypeChainOnly()) { |
| 2144 | stub = StoreElementStub(old_receiver_map, store_mode); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2145 | } else { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2146 | TRACE_GENERIC_IC(isolate(), "KeyedStoreIC", |
| 2147 | "dictionary or proxy prototype"); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2148 | } |
| 2149 | } else { |
| 2150 | TRACE_GENERIC_IC(isolate(), "KeyedStoreIC", "non-smi-like key"); |
| 2151 | } |
| 2152 | } else { |
| 2153 | TRACE_GENERIC_IC(isolate(), "KeyedStoreIC", "non-JSObject receiver"); |
| 2154 | } |
| 2155 | } |
| 2156 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2157 | if (!is_vector_set() || stub.is_null()) { |
| 2158 | Code* megamorphic = *megamorphic_stub(); |
| 2159 | if (!stub.is_null() && (*stub == megamorphic || *stub == *slow_stub())) { |
| 2160 | ConfigureVectorState(MEGAMORPHIC); |
| 2161 | TRACE_GENERIC_IC(isolate(), "KeyedStoreIC", |
| 2162 | *stub == megamorphic ? "set generic" : "slow stub"); |
| 2163 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2164 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2165 | TRACE_IC("StoreIC", key); |
| 2166 | |
| 2167 | return store_handle; |
| 2168 | } |
| 2169 | |
| 2170 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2171 | void CallIC::HandleMiss(Handle<Object> function) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2172 | Handle<Object> name = isolate()->factory()->empty_string(); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2173 | CallICNexus* nexus = casted_nexus<CallICNexus>(); |
| 2174 | Object* feedback = nexus->GetFeedback(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2175 | |
| 2176 | // Hand-coded MISS handling is easier if CallIC slots don't contain smis. |
| 2177 | DCHECK(!feedback->IsSmi()); |
| 2178 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2179 | if (feedback->IsWeakCell() || !function->IsJSFunction() || |
| 2180 | feedback->IsAllocationSite()) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2181 | // We are going generic. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2182 | nexus->ConfigureMegamorphic(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2183 | } else { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2184 | DCHECK(feedback == *TypeFeedbackVector::UninitializedSentinel(isolate())); |
| 2185 | Handle<JSFunction> js_function = Handle<JSFunction>::cast(function); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2186 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2187 | Handle<JSFunction> array_function = |
| 2188 | Handle<JSFunction>(isolate()->native_context()->array_function()); |
| 2189 | if (array_function.is_identical_to(js_function)) { |
| 2190 | // Alter the slot. |
| 2191 | nexus->ConfigureMonomorphicArray(); |
| 2192 | } else if (js_function->context()->native_context() != |
| 2193 | *isolate()->native_context()) { |
| 2194 | // Don't collect cross-native context feedback for the CallIC. |
| 2195 | // TODO(bmeurer): We should collect the SharedFunctionInfo as |
| 2196 | // feedback in this case instead. |
| 2197 | nexus->ConfigureMegamorphic(); |
| 2198 | } else { |
| 2199 | nexus->ConfigureMonomorphic(js_function); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2200 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2201 | } |
| 2202 | |
| 2203 | if (function->IsJSFunction()) { |
| 2204 | Handle<JSFunction> js_function = Handle<JSFunction>::cast(function); |
| 2205 | name = handle(js_function->shared()->name(), isolate()); |
| 2206 | } |
| 2207 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2208 | OnTypeFeedbackChanged(isolate(), get_host()); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2209 | TRACE_IC("CallIC", name); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2210 | } |
| 2211 | |
| 2212 | |
| 2213 | #undef TRACE_IC |
| 2214 | |
| 2215 | |
| 2216 | // ---------------------------------------------------------------------------- |
| 2217 | // Static IC stub generators. |
| 2218 | // |
| 2219 | |
| 2220 | // Used from ic-<arch>.cc. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2221 | RUNTIME_FUNCTION(Runtime_CallIC_Miss) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2222 | TimerEventScope<TimerEventIcMiss> timer(isolate); |
| 2223 | HandleScope scope(isolate); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2224 | DCHECK(args.length() == 3); |
| 2225 | Handle<Object> function = args.at<Object>(0); |
| 2226 | Handle<TypeFeedbackVector> vector = args.at<TypeFeedbackVector>(1); |
| 2227 | Handle<Smi> slot = args.at<Smi>(2); |
| 2228 | FeedbackVectorSlot vector_slot = vector->ToSlot(slot->value()); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2229 | CallICNexus nexus(vector, vector_slot); |
| 2230 | CallIC ic(isolate, &nexus); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2231 | ic.HandleMiss(function); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2232 | return *function; |
| 2233 | } |
| 2234 | |
| 2235 | |
| 2236 | // Used from ic-<arch>.cc. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2237 | RUNTIME_FUNCTION(Runtime_LoadIC_Miss) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2238 | TimerEventScope<TimerEventIcMiss> timer(isolate); |
| 2239 | HandleScope scope(isolate); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2240 | Handle<Object> receiver = args.at<Object>(0); |
| 2241 | Handle<Name> key = args.at<Name>(1); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2242 | Handle<Object> result; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2243 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2244 | DCHECK(args.length() == 4); |
| 2245 | Handle<Smi> slot = args.at<Smi>(2); |
| 2246 | Handle<TypeFeedbackVector> vector = args.at<TypeFeedbackVector>(3); |
| 2247 | FeedbackVectorSlot vector_slot = vector->ToSlot(slot->value()); |
| 2248 | // A monomorphic or polymorphic KeyedLoadIC with a string key can call the |
| 2249 | // LoadIC miss handler if the handler misses. Since the vector Nexus is |
| 2250 | // set up outside the IC, handle that here. |
| 2251 | if (vector->GetKind(vector_slot) == FeedbackVectorSlotKind::LOAD_IC) { |
| 2252 | LoadICNexus nexus(vector, vector_slot); |
| 2253 | LoadIC ic(IC::NO_EXTRA_FRAME, isolate, &nexus); |
| 2254 | ic.UpdateState(receiver, key); |
| 2255 | ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, result, ic.Load(receiver, key)); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2256 | } else { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2257 | DCHECK_EQ(FeedbackVectorSlotKind::KEYED_LOAD_IC, |
| 2258 | vector->GetKind(vector_slot)); |
| 2259 | KeyedLoadICNexus nexus(vector, vector_slot); |
| 2260 | KeyedLoadIC ic(IC::NO_EXTRA_FRAME, isolate, &nexus); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2261 | ic.UpdateState(receiver, key); |
| 2262 | ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, result, ic.Load(receiver, key)); |
| 2263 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2264 | return *result; |
| 2265 | } |
| 2266 | |
| 2267 | |
| 2268 | // Used from ic-<arch>.cc |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2269 | RUNTIME_FUNCTION(Runtime_KeyedLoadIC_Miss) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2270 | TimerEventScope<TimerEventIcMiss> timer(isolate); |
| 2271 | HandleScope scope(isolate); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2272 | Handle<Object> receiver = args.at<Object>(0); |
| 2273 | Handle<Object> key = args.at<Object>(1); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2274 | Handle<Object> result; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2275 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2276 | DCHECK(args.length() == 4); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2277 | Handle<Smi> slot = args.at<Smi>(2); |
| 2278 | Handle<TypeFeedbackVector> vector = args.at<TypeFeedbackVector>(3); |
| 2279 | FeedbackVectorSlot vector_slot = vector->ToSlot(slot->value()); |
| 2280 | KeyedLoadICNexus nexus(vector, vector_slot); |
| 2281 | KeyedLoadIC ic(IC::NO_EXTRA_FRAME, isolate, &nexus); |
| 2282 | ic.UpdateState(receiver, key); |
| 2283 | ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, result, ic.Load(receiver, key)); |
| 2284 | return *result; |
| 2285 | } |
| 2286 | |
| 2287 | |
| 2288 | RUNTIME_FUNCTION(Runtime_KeyedLoadIC_MissFromStubFailure) { |
| 2289 | TimerEventScope<TimerEventIcMiss> timer(isolate); |
| 2290 | HandleScope scope(isolate); |
| 2291 | Handle<Object> receiver = args.at<Object>(0); |
| 2292 | Handle<Object> key = args.at<Object>(1); |
| 2293 | Handle<Object> result; |
| 2294 | |
| 2295 | DCHECK(args.length() == 4); |
| 2296 | Handle<Smi> slot = args.at<Smi>(2); |
| 2297 | Handle<TypeFeedbackVector> vector = args.at<TypeFeedbackVector>(3); |
| 2298 | FeedbackVectorSlot vector_slot = vector->ToSlot(slot->value()); |
| 2299 | KeyedLoadICNexus nexus(vector, vector_slot); |
| 2300 | KeyedLoadIC ic(IC::EXTRA_CALL_FRAME, isolate, &nexus); |
| 2301 | ic.UpdateState(receiver, key); |
| 2302 | ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, result, ic.Load(receiver, key)); |
| 2303 | |
| 2304 | return *result; |
| 2305 | } |
| 2306 | |
| 2307 | |
| 2308 | // Used from ic-<arch>.cc. |
| 2309 | RUNTIME_FUNCTION(Runtime_StoreIC_Miss) { |
| 2310 | TimerEventScope<TimerEventIcMiss> timer(isolate); |
| 2311 | HandleScope scope(isolate); |
| 2312 | Handle<Object> receiver = args.at<Object>(0); |
| 2313 | Handle<Name> key = args.at<Name>(1); |
| 2314 | Handle<Object> value = args.at<Object>(2); |
| 2315 | Handle<Object> result; |
| 2316 | |
| 2317 | DCHECK(args.length() == 5 || args.length() == 6); |
| 2318 | Handle<Smi> slot = args.at<Smi>(3); |
| 2319 | Handle<TypeFeedbackVector> vector = args.at<TypeFeedbackVector>(4); |
| 2320 | FeedbackVectorSlot vector_slot = vector->ToSlot(slot->value()); |
| 2321 | if (vector->GetKind(vector_slot) == FeedbackVectorSlotKind::STORE_IC) { |
| 2322 | StoreICNexus nexus(vector, vector_slot); |
| 2323 | StoreIC ic(IC::NO_EXTRA_FRAME, isolate, &nexus); |
| 2324 | ic.UpdateState(receiver, key); |
| 2325 | ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, result, |
| 2326 | ic.Store(receiver, key, value)); |
| 2327 | } else { |
| 2328 | DCHECK_EQ(FeedbackVectorSlotKind::KEYED_STORE_IC, |
| 2329 | vector->GetKind(vector_slot)); |
| 2330 | KeyedStoreICNexus nexus(vector, vector_slot); |
| 2331 | KeyedStoreIC ic(IC::NO_EXTRA_FRAME, isolate, &nexus); |
| 2332 | ic.UpdateState(receiver, key); |
| 2333 | ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, result, |
| 2334 | ic.Store(receiver, key, value)); |
| 2335 | } |
| 2336 | return *result; |
| 2337 | } |
| 2338 | |
| 2339 | |
| 2340 | RUNTIME_FUNCTION(Runtime_StoreIC_MissFromStubFailure) { |
| 2341 | TimerEventScope<TimerEventIcMiss> timer(isolate); |
| 2342 | HandleScope scope(isolate); |
| 2343 | Handle<Object> receiver = args.at<Object>(0); |
| 2344 | Handle<Name> key = args.at<Name>(1); |
| 2345 | Handle<Object> value = args.at<Object>(2); |
| 2346 | Handle<Object> result; |
| 2347 | |
| 2348 | int length = args.length(); |
| 2349 | DCHECK(length == 5 || length == 6); |
| 2350 | // We might have slot and vector, for a normal miss (slot(3), vector(4)). |
| 2351 | // Or, map and vector for a transitioning store miss (map(3), vector(4)). |
| 2352 | // In this case, we need to recover the slot from a virtual register. |
| 2353 | // If length == 6, then a map is included (map(3), slot(4), vector(5)). |
| 2354 | Handle<Smi> slot; |
| 2355 | Handle<TypeFeedbackVector> vector; |
| 2356 | if (length == 5) { |
| 2357 | if (args.at<Object>(3)->IsMap()) { |
| 2358 | vector = args.at<TypeFeedbackVector>(4); |
| 2359 | slot = handle( |
| 2360 | *reinterpret_cast<Smi**>(isolate->virtual_slot_register_address()), |
| 2361 | isolate); |
| 2362 | } else { |
| 2363 | vector = args.at<TypeFeedbackVector>(4); |
| 2364 | slot = args.at<Smi>(3); |
| 2365 | } |
| 2366 | } else { |
| 2367 | vector = args.at<TypeFeedbackVector>(5); |
| 2368 | slot = args.at<Smi>(4); |
| 2369 | } |
| 2370 | |
| 2371 | FeedbackVectorSlot vector_slot = vector->ToSlot(slot->value()); |
| 2372 | if (vector->GetKind(vector_slot) == FeedbackVectorSlotKind::STORE_IC) { |
| 2373 | StoreICNexus nexus(vector, vector_slot); |
| 2374 | StoreIC ic(IC::EXTRA_CALL_FRAME, isolate, &nexus); |
| 2375 | ic.UpdateState(receiver, key); |
| 2376 | ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, result, |
| 2377 | ic.Store(receiver, key, value)); |
| 2378 | } else { |
| 2379 | DCHECK_EQ(FeedbackVectorSlotKind::KEYED_STORE_IC, |
| 2380 | vector->GetKind(vector_slot)); |
| 2381 | KeyedStoreICNexus nexus(vector, vector_slot); |
| 2382 | KeyedStoreIC ic(IC::EXTRA_CALL_FRAME, isolate, &nexus); |
| 2383 | ic.UpdateState(receiver, key); |
| 2384 | ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, result, |
| 2385 | ic.Store(receiver, key, value)); |
| 2386 | } |
| 2387 | return *result; |
| 2388 | } |
| 2389 | |
| 2390 | |
| 2391 | // Used from ic-<arch>.cc. |
| 2392 | RUNTIME_FUNCTION(Runtime_KeyedStoreIC_Miss) { |
| 2393 | TimerEventScope<TimerEventIcMiss> timer(isolate); |
| 2394 | HandleScope scope(isolate); |
| 2395 | Handle<Object> receiver = args.at<Object>(0); |
| 2396 | Handle<Object> key = args.at<Object>(1); |
| 2397 | Handle<Object> value = args.at<Object>(2); |
| 2398 | Handle<Object> result; |
| 2399 | |
| 2400 | DCHECK(args.length() == 5); |
| 2401 | Handle<Smi> slot = args.at<Smi>(3); |
| 2402 | Handle<TypeFeedbackVector> vector = args.at<TypeFeedbackVector>(4); |
| 2403 | FeedbackVectorSlot vector_slot = vector->ToSlot(slot->value()); |
| 2404 | KeyedStoreICNexus nexus(vector, vector_slot); |
| 2405 | KeyedStoreIC ic(IC::NO_EXTRA_FRAME, isolate, &nexus); |
| 2406 | ic.UpdateState(receiver, key); |
| 2407 | ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, result, |
| 2408 | ic.Store(receiver, key, value)); |
| 2409 | return *result; |
| 2410 | } |
| 2411 | |
| 2412 | |
| 2413 | RUNTIME_FUNCTION(Runtime_KeyedStoreIC_MissFromStubFailure) { |
| 2414 | TimerEventScope<TimerEventIcMiss> timer(isolate); |
| 2415 | HandleScope scope(isolate); |
| 2416 | Handle<Object> receiver = args.at<Object>(0); |
| 2417 | Handle<Object> key = args.at<Object>(1); |
| 2418 | Handle<Object> value = args.at<Object>(2); |
| 2419 | Handle<Object> result; |
| 2420 | |
| 2421 | DCHECK(args.length() == 5); |
| 2422 | Handle<Smi> slot = args.at<Smi>(3); |
| 2423 | Handle<TypeFeedbackVector> vector = args.at<TypeFeedbackVector>(4); |
| 2424 | FeedbackVectorSlot vector_slot = vector->ToSlot(slot->value()); |
| 2425 | KeyedStoreICNexus nexus(vector, vector_slot); |
| 2426 | KeyedStoreIC ic(IC::EXTRA_CALL_FRAME, isolate, &nexus); |
| 2427 | ic.UpdateState(receiver, key); |
| 2428 | ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, result, |
| 2429 | ic.Store(receiver, key, value)); |
| 2430 | return *result; |
| 2431 | } |
| 2432 | |
| 2433 | |
| 2434 | RUNTIME_FUNCTION(Runtime_StoreIC_Slow) { |
| 2435 | HandleScope scope(isolate); |
| 2436 | DCHECK(args.length() == 5); |
| 2437 | Handle<Object> object = args.at<Object>(0); |
| 2438 | Handle<Object> key = args.at<Object>(1); |
| 2439 | Handle<Object> value = args.at<Object>(2); |
| 2440 | LanguageMode language_mode; |
| 2441 | StoreICNexus nexus(isolate); |
| 2442 | StoreIC ic(IC::NO_EXTRA_FRAME, isolate, &nexus); |
| 2443 | language_mode = ic.language_mode(); |
| 2444 | Handle<Object> result; |
| 2445 | ASSIGN_RETURN_FAILURE_ON_EXCEPTION( |
| 2446 | isolate, result, |
| 2447 | Runtime::SetObjectProperty(isolate, object, key, value, language_mode)); |
| 2448 | return *result; |
| 2449 | } |
| 2450 | |
| 2451 | |
| 2452 | RUNTIME_FUNCTION(Runtime_KeyedStoreIC_Slow) { |
| 2453 | HandleScope scope(isolate); |
| 2454 | DCHECK(args.length() == 5); |
| 2455 | Handle<Object> object = args.at<Object>(0); |
| 2456 | Handle<Object> key = args.at<Object>(1); |
| 2457 | Handle<Object> value = args.at<Object>(2); |
| 2458 | LanguageMode language_mode; |
| 2459 | KeyedStoreICNexus nexus(isolate); |
| 2460 | KeyedStoreIC ic(IC::NO_EXTRA_FRAME, isolate, &nexus); |
| 2461 | language_mode = ic.language_mode(); |
| 2462 | Handle<Object> result; |
| 2463 | ASSIGN_RETURN_FAILURE_ON_EXCEPTION( |
| 2464 | isolate, result, |
| 2465 | Runtime::SetObjectProperty(isolate, object, key, value, language_mode)); |
| 2466 | return *result; |
| 2467 | } |
| 2468 | |
| 2469 | |
| 2470 | RUNTIME_FUNCTION(Runtime_ElementsTransitionAndStoreIC_Miss) { |
| 2471 | TimerEventScope<TimerEventIcMiss> timer(isolate); |
| 2472 | HandleScope scope(isolate); |
| 2473 | // Length == 5 or 6, depending on whether the vector slot |
| 2474 | // is passed in a virtual register or not. |
| 2475 | DCHECK(args.length() == 5 || args.length() == 6); |
| 2476 | Handle<Object> object = args.at<Object>(0); |
| 2477 | Handle<Object> key = args.at<Object>(1); |
| 2478 | Handle<Object> value = args.at<Object>(2); |
| 2479 | Handle<Map> map = args.at<Map>(3); |
| 2480 | LanguageMode language_mode; |
| 2481 | KeyedStoreICNexus nexus(isolate); |
| 2482 | KeyedStoreIC ic(IC::EXTRA_CALL_FRAME, isolate, &nexus); |
| 2483 | language_mode = ic.language_mode(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2484 | if (object->IsJSObject()) { |
| 2485 | JSObject::TransitionElementsKind(Handle<JSObject>::cast(object), |
| 2486 | map->elements_kind()); |
| 2487 | } |
| 2488 | Handle<Object> result; |
| 2489 | ASSIGN_RETURN_FAILURE_ON_EXCEPTION( |
| 2490 | isolate, result, |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2491 | Runtime::SetObjectProperty(isolate, object, key, value, language_mode)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2492 | return *result; |
| 2493 | } |
| 2494 | |
| 2495 | |
| 2496 | MaybeHandle<Object> BinaryOpIC::Transition( |
| 2497 | Handle<AllocationSite> allocation_site, Handle<Object> left, |
| 2498 | Handle<Object> right) { |
| 2499 | BinaryOpICState state(isolate(), target()->extra_ic_state()); |
| 2500 | |
| 2501 | // Compute the actual result using the builtin for the binary operation. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2502 | Handle<Object> result; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2503 | switch (state.op()) { |
| 2504 | default: |
| 2505 | UNREACHABLE(); |
| 2506 | case Token::ADD: |
| 2507 | ASSIGN_RETURN_ON_EXCEPTION( |
| 2508 | isolate(), result, |
| 2509 | Object::Add(isolate(), left, right, state.strength()), Object); |
| 2510 | break; |
| 2511 | case Token::SUB: |
| 2512 | ASSIGN_RETURN_ON_EXCEPTION( |
| 2513 | isolate(), result, |
| 2514 | Object::Subtract(isolate(), left, right, state.strength()), Object); |
| 2515 | break; |
| 2516 | case Token::MUL: |
| 2517 | ASSIGN_RETURN_ON_EXCEPTION( |
| 2518 | isolate(), result, |
| 2519 | Object::Multiply(isolate(), left, right, state.strength()), Object); |
| 2520 | break; |
| 2521 | case Token::DIV: |
| 2522 | ASSIGN_RETURN_ON_EXCEPTION( |
| 2523 | isolate(), result, |
| 2524 | Object::Divide(isolate(), left, right, state.strength()), Object); |
| 2525 | break; |
| 2526 | case Token::MOD: |
| 2527 | ASSIGN_RETURN_ON_EXCEPTION( |
| 2528 | isolate(), result, |
| 2529 | Object::Modulus(isolate(), left, right, state.strength()), Object); |
| 2530 | break; |
| 2531 | case Token::BIT_OR: |
| 2532 | ASSIGN_RETURN_ON_EXCEPTION( |
| 2533 | isolate(), result, |
| 2534 | Object::BitwiseOr(isolate(), left, right, state.strength()), Object); |
| 2535 | break; |
| 2536 | case Token::BIT_AND: |
| 2537 | ASSIGN_RETURN_ON_EXCEPTION( |
| 2538 | isolate(), result, |
| 2539 | Object::BitwiseAnd(isolate(), left, right, state.strength()), Object); |
| 2540 | break; |
| 2541 | case Token::BIT_XOR: |
| 2542 | ASSIGN_RETURN_ON_EXCEPTION( |
| 2543 | isolate(), result, |
| 2544 | Object::BitwiseXor(isolate(), left, right, state.strength()), Object); |
| 2545 | break; |
| 2546 | case Token::SAR: |
| 2547 | ASSIGN_RETURN_ON_EXCEPTION( |
| 2548 | isolate(), result, |
| 2549 | Object::ShiftRight(isolate(), left, right, state.strength()), Object); |
| 2550 | break; |
| 2551 | case Token::SHR: |
| 2552 | ASSIGN_RETURN_ON_EXCEPTION( |
| 2553 | isolate(), result, |
| 2554 | Object::ShiftRightLogical(isolate(), left, right, state.strength()), |
| 2555 | Object); |
| 2556 | break; |
| 2557 | case Token::SHL: |
| 2558 | ASSIGN_RETURN_ON_EXCEPTION( |
| 2559 | isolate(), result, |
| 2560 | Object::ShiftLeft(isolate(), left, right, state.strength()), Object); |
| 2561 | break; |
| 2562 | } |
| 2563 | |
| 2564 | // Do not try to update the target if the code was marked for lazy |
| 2565 | // deoptimization. (Since we do not relocate addresses in these |
| 2566 | // code objects, an attempt to access the target could fail.) |
| 2567 | if (AddressIsDeoptimizedCode()) { |
| 2568 | return result; |
| 2569 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2570 | |
| 2571 | // Execution::Call can execute arbitrary JavaScript, hence potentially |
| 2572 | // update the state of this very IC, so we must update the stored state. |
| 2573 | UpdateTarget(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2574 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2575 | // Compute the new state. |
| 2576 | BinaryOpICState old_state(isolate(), target()->extra_ic_state()); |
| 2577 | state.Update(left, right, result); |
| 2578 | |
| 2579 | // Check if we have a string operation here. |
| 2580 | Handle<Code> target; |
| 2581 | if (!allocation_site.is_null() || state.ShouldCreateAllocationMementos()) { |
| 2582 | // Setup the allocation site on-demand. |
| 2583 | if (allocation_site.is_null()) { |
| 2584 | allocation_site = isolate()->factory()->NewAllocationSite(); |
| 2585 | } |
| 2586 | |
| 2587 | // Install the stub with an allocation site. |
| 2588 | BinaryOpICWithAllocationSiteStub stub(isolate(), state); |
| 2589 | target = stub.GetCodeCopyFromTemplate(allocation_site); |
| 2590 | |
| 2591 | // Sanity check the trampoline stub. |
| 2592 | DCHECK_EQ(*allocation_site, target->FindFirstAllocationSite()); |
| 2593 | } else { |
| 2594 | // Install the generic stub. |
| 2595 | BinaryOpICStub stub(isolate(), state); |
| 2596 | target = stub.GetCode(); |
| 2597 | |
| 2598 | // Sanity check the generic stub. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2599 | DCHECK_NULL(target->FindFirstAllocationSite()); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2600 | } |
| 2601 | set_target(*target); |
| 2602 | |
| 2603 | if (FLAG_trace_ic) { |
| 2604 | OFStream os(stdout); |
| 2605 | os << "[BinaryOpIC" << old_state << " => " << state << " @ " |
| 2606 | << static_cast<void*>(*target) << " <- "; |
| 2607 | JavaScriptFrame::PrintTop(isolate(), stdout, false, true); |
| 2608 | if (!allocation_site.is_null()) { |
| 2609 | os << " using allocation site " << static_cast<void*>(*allocation_site); |
| 2610 | } |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2611 | os << "]" << std::endl; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2612 | } |
| 2613 | |
| 2614 | // Patch the inlined smi code as necessary. |
| 2615 | if (!old_state.UseInlinedSmiCode() && state.UseInlinedSmiCode()) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2616 | PatchInlinedSmiCode(isolate(), address(), ENABLE_INLINED_SMI_CHECK); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2617 | } else if (old_state.UseInlinedSmiCode() && !state.UseInlinedSmiCode()) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2618 | PatchInlinedSmiCode(isolate(), address(), DISABLE_INLINED_SMI_CHECK); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2619 | } |
| 2620 | |
| 2621 | return result; |
| 2622 | } |
| 2623 | |
| 2624 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2625 | RUNTIME_FUNCTION(Runtime_BinaryOpIC_Miss) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2626 | TimerEventScope<TimerEventIcMiss> timer(isolate); |
| 2627 | HandleScope scope(isolate); |
| 2628 | DCHECK_EQ(2, args.length()); |
| 2629 | Handle<Object> left = args.at<Object>(BinaryOpICStub::kLeft); |
| 2630 | Handle<Object> right = args.at<Object>(BinaryOpICStub::kRight); |
| 2631 | BinaryOpIC ic(isolate); |
| 2632 | Handle<Object> result; |
| 2633 | ASSIGN_RETURN_FAILURE_ON_EXCEPTION( |
| 2634 | isolate, result, |
| 2635 | ic.Transition(Handle<AllocationSite>::null(), left, right)); |
| 2636 | return *result; |
| 2637 | } |
| 2638 | |
| 2639 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2640 | RUNTIME_FUNCTION(Runtime_BinaryOpIC_MissWithAllocationSite) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2641 | TimerEventScope<TimerEventIcMiss> timer(isolate); |
| 2642 | HandleScope scope(isolate); |
| 2643 | DCHECK_EQ(3, args.length()); |
| 2644 | Handle<AllocationSite> allocation_site = |
| 2645 | args.at<AllocationSite>(BinaryOpWithAllocationSiteStub::kAllocationSite); |
| 2646 | Handle<Object> left = args.at<Object>(BinaryOpWithAllocationSiteStub::kLeft); |
| 2647 | Handle<Object> right = |
| 2648 | args.at<Object>(BinaryOpWithAllocationSiteStub::kRight); |
| 2649 | BinaryOpIC ic(isolate); |
| 2650 | Handle<Object> result; |
| 2651 | ASSIGN_RETURN_FAILURE_ON_EXCEPTION( |
| 2652 | isolate, result, ic.Transition(allocation_site, left, right)); |
| 2653 | return *result; |
| 2654 | } |
| 2655 | |
| 2656 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2657 | Code* CompareIC::GetRawUninitialized(Isolate* isolate, Token::Value op, |
| 2658 | Strength strength) { |
| 2659 | CompareICStub stub(isolate, op, strength, CompareICState::UNINITIALIZED, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2660 | CompareICState::UNINITIALIZED, |
| 2661 | CompareICState::UNINITIALIZED); |
| 2662 | Code* code = NULL; |
| 2663 | CHECK(stub.FindCodeInCache(&code)); |
| 2664 | return code; |
| 2665 | } |
| 2666 | |
| 2667 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2668 | Handle<Code> CompareIC::GetUninitialized(Isolate* isolate, Token::Value op, |
| 2669 | Strength strength) { |
| 2670 | CompareICStub stub(isolate, op, strength, CompareICState::UNINITIALIZED, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2671 | CompareICState::UNINITIALIZED, |
| 2672 | CompareICState::UNINITIALIZED); |
| 2673 | return stub.GetCode(); |
| 2674 | } |
| 2675 | |
| 2676 | |
| 2677 | Code* CompareIC::UpdateCaches(Handle<Object> x, Handle<Object> y) { |
| 2678 | HandleScope scope(isolate()); |
| 2679 | CompareICStub old_stub(target()->stub_key(), isolate()); |
| 2680 | CompareICState::State new_left = |
| 2681 | CompareICState::NewInputState(old_stub.left(), x); |
| 2682 | CompareICState::State new_right = |
| 2683 | CompareICState::NewInputState(old_stub.right(), y); |
| 2684 | CompareICState::State state = CompareICState::TargetState( |
| 2685 | old_stub.state(), old_stub.left(), old_stub.right(), op_, |
| 2686 | HasInlinedSmiCode(address()), x, y); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2687 | CompareICStub stub(isolate(), op_, old_stub.strength(), new_left, new_right, |
| 2688 | state); |
| 2689 | if (state == CompareICState::KNOWN_RECEIVER) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2690 | stub.set_known_map( |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2691 | Handle<Map>(Handle<JSReceiver>::cast(x)->map(), isolate())); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2692 | } |
| 2693 | Handle<Code> new_target = stub.GetCode(); |
| 2694 | set_target(*new_target); |
| 2695 | |
| 2696 | if (FLAG_trace_ic) { |
| 2697 | PrintF("[CompareIC in "); |
| 2698 | JavaScriptFrame::PrintTop(isolate(), stdout, false, true); |
| 2699 | PrintF(" ((%s+%s=%s)->(%s+%s=%s))#%s @ %p]\n", |
| 2700 | CompareICState::GetStateName(old_stub.left()), |
| 2701 | CompareICState::GetStateName(old_stub.right()), |
| 2702 | CompareICState::GetStateName(old_stub.state()), |
| 2703 | CompareICState::GetStateName(new_left), |
| 2704 | CompareICState::GetStateName(new_right), |
| 2705 | CompareICState::GetStateName(state), Token::Name(op_), |
| 2706 | static_cast<void*>(*stub.GetCode())); |
| 2707 | } |
| 2708 | |
| 2709 | // Activate inlined smi code. |
| 2710 | if (old_stub.state() == CompareICState::UNINITIALIZED) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2711 | PatchInlinedSmiCode(isolate(), address(), ENABLE_INLINED_SMI_CHECK); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2712 | } |
| 2713 | |
| 2714 | return *new_target; |
| 2715 | } |
| 2716 | |
| 2717 | |
| 2718 | // Used from CompareICStub::GenerateMiss in code-stubs-<arch>.cc. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2719 | RUNTIME_FUNCTION(Runtime_CompareIC_Miss) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2720 | TimerEventScope<TimerEventIcMiss> timer(isolate); |
| 2721 | HandleScope scope(isolate); |
| 2722 | DCHECK(args.length() == 3); |
| 2723 | CompareIC ic(isolate, static_cast<Token::Value>(args.smi_at(2))); |
| 2724 | return ic.UpdateCaches(args.at<Object>(0), args.at<Object>(1)); |
| 2725 | } |
| 2726 | |
| 2727 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2728 | void CompareNilIC::Clear(Address address, Code* target, Address constant_pool) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2729 | if (IsCleared(target)) return; |
| 2730 | ExtraICState state = target->extra_ic_state(); |
| 2731 | |
| 2732 | CompareNilICStub stub(target->GetIsolate(), state, |
| 2733 | HydrogenCodeStub::UNINITIALIZED); |
| 2734 | stub.ClearState(); |
| 2735 | |
| 2736 | Code* code = NULL; |
| 2737 | CHECK(stub.FindCodeInCache(&code)); |
| 2738 | |
| 2739 | SetTargetAtAddress(address, code, constant_pool); |
| 2740 | } |
| 2741 | |
| 2742 | |
| 2743 | Handle<Object> CompareNilIC::DoCompareNilSlow(Isolate* isolate, NilValue nil, |
| 2744 | Handle<Object> object) { |
| 2745 | if (object->IsNull() || object->IsUndefined()) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2746 | return isolate->factory()->true_value(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2747 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2748 | return isolate->factory()->ToBoolean(object->IsUndetectableObject()); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2749 | } |
| 2750 | |
| 2751 | |
| 2752 | Handle<Object> CompareNilIC::CompareNil(Handle<Object> object) { |
| 2753 | ExtraICState extra_ic_state = target()->extra_ic_state(); |
| 2754 | |
| 2755 | CompareNilICStub stub(isolate(), extra_ic_state); |
| 2756 | |
| 2757 | // Extract the current supported types from the patched IC and calculate what |
| 2758 | // types must be supported as a result of the miss. |
| 2759 | bool already_monomorphic = stub.IsMonomorphic(); |
| 2760 | |
| 2761 | stub.UpdateStatus(object); |
| 2762 | |
| 2763 | NilValue nil = stub.nil_value(); |
| 2764 | |
| 2765 | // Find or create the specialized stub to support the new set of types. |
| 2766 | Handle<Code> code; |
| 2767 | if (stub.IsMonomorphic()) { |
| 2768 | Handle<Map> monomorphic_map(already_monomorphic && FirstTargetMap() != NULL |
| 2769 | ? FirstTargetMap() |
| 2770 | : HeapObject::cast(*object)->map()); |
| 2771 | code = PropertyICCompiler::ComputeCompareNil(monomorphic_map, &stub); |
| 2772 | } else { |
| 2773 | code = stub.GetCode(); |
| 2774 | } |
| 2775 | set_target(*code); |
| 2776 | return DoCompareNilSlow(isolate(), nil, object); |
| 2777 | } |
| 2778 | |
| 2779 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2780 | RUNTIME_FUNCTION(Runtime_CompareNilIC_Miss) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2781 | TimerEventScope<TimerEventIcMiss> timer(isolate); |
| 2782 | HandleScope scope(isolate); |
| 2783 | Handle<Object> object = args.at<Object>(0); |
| 2784 | CompareNilIC ic(isolate); |
| 2785 | return *ic.CompareNil(object); |
| 2786 | } |
| 2787 | |
| 2788 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2789 | RUNTIME_FUNCTION(Runtime_Unreachable) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2790 | UNREACHABLE(); |
| 2791 | CHECK(false); |
| 2792 | return isolate->heap()->undefined_value(); |
| 2793 | } |
| 2794 | |
| 2795 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2796 | Handle<Object> ToBooleanIC::ToBoolean(Handle<Object> object) { |
| 2797 | ToBooleanStub stub(isolate(), target()->extra_ic_state()); |
| 2798 | bool to_boolean_value = stub.UpdateStatus(object); |
| 2799 | Handle<Code> code = stub.GetCode(); |
| 2800 | set_target(*code); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2801 | return isolate()->factory()->ToBoolean(to_boolean_value); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2802 | } |
| 2803 | |
| 2804 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2805 | RUNTIME_FUNCTION(Runtime_ToBooleanIC_Miss) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2806 | TimerEventScope<TimerEventIcMiss> timer(isolate); |
| 2807 | DCHECK(args.length() == 1); |
| 2808 | HandleScope scope(isolate); |
| 2809 | Handle<Object> object = args.at<Object>(0); |
| 2810 | ToBooleanIC ic(isolate); |
| 2811 | return *ic.ToBoolean(object); |
| 2812 | } |
| 2813 | |
| 2814 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2815 | RUNTIME_FUNCTION(Runtime_StoreCallbackProperty) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2816 | Handle<JSObject> receiver = args.at<JSObject>(0); |
| 2817 | Handle<JSObject> holder = args.at<JSObject>(1); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2818 | Handle<HeapObject> callback_or_cell = args.at<HeapObject>(2); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2819 | Handle<Name> name = args.at<Name>(3); |
| 2820 | Handle<Object> value = args.at<Object>(4); |
| 2821 | HandleScope scope(isolate); |
| 2822 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2823 | Handle<ExecutableAccessorInfo> callback( |
| 2824 | callback_or_cell->IsWeakCell() |
| 2825 | ? ExecutableAccessorInfo::cast( |
| 2826 | WeakCell::cast(*callback_or_cell)->value()) |
| 2827 | : ExecutableAccessorInfo::cast(*callback_or_cell)); |
| 2828 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2829 | DCHECK(callback->IsCompatibleReceiver(*receiver)); |
| 2830 | |
| 2831 | Address setter_address = v8::ToCData<Address>(callback->setter()); |
| 2832 | v8::AccessorNameSetterCallback fun = |
| 2833 | FUNCTION_CAST<v8::AccessorNameSetterCallback>(setter_address); |
| 2834 | DCHECK(fun != NULL); |
| 2835 | |
| 2836 | LOG(isolate, ApiNamedPropertyAccess("store", *receiver, *name)); |
| 2837 | PropertyCallbackArguments custom_args(isolate, callback->data(), *receiver, |
| 2838 | *holder); |
| 2839 | custom_args.Call(fun, v8::Utils::ToLocal(name), v8::Utils::ToLocal(value)); |
| 2840 | RETURN_FAILURE_IF_SCHEDULED_EXCEPTION(isolate); |
| 2841 | return *value; |
| 2842 | } |
| 2843 | |
| 2844 | |
| 2845 | /** |
| 2846 | * Attempts to load a property with an interceptor (which must be present), |
| 2847 | * but doesn't search the prototype chain. |
| 2848 | * |
| 2849 | * Returns |Heap::no_interceptor_result_sentinel()| if interceptor doesn't |
| 2850 | * provide any value for the given name. |
| 2851 | */ |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2852 | RUNTIME_FUNCTION(Runtime_LoadPropertyWithInterceptorOnly) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2853 | DCHECK(args.length() == NamedLoadHandlerCompiler::kInterceptorArgsLength); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2854 | Handle<Name> name = |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2855 | args.at<Name>(NamedLoadHandlerCompiler::kInterceptorArgsNameIndex); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2856 | Handle<JSObject> receiver = |
| 2857 | args.at<JSObject>(NamedLoadHandlerCompiler::kInterceptorArgsThisIndex); |
| 2858 | Handle<JSObject> holder = |
| 2859 | args.at<JSObject>(NamedLoadHandlerCompiler::kInterceptorArgsHolderIndex); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2860 | HandleScope scope(isolate); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2861 | LookupIterator it(receiver, name, holder, LookupIterator::OWN); |
| 2862 | bool done; |
| 2863 | Handle<Object> result; |
| 2864 | ASSIGN_RETURN_FAILURE_ON_EXCEPTION( |
| 2865 | isolate, result, JSObject::GetPropertyWithInterceptor(&it, &done)); |
| 2866 | if (done) return *result; |
| 2867 | return isolate->heap()->no_interceptor_result_sentinel(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2868 | } |
| 2869 | |
| 2870 | |
| 2871 | /** |
| 2872 | * Loads a property with an interceptor performing post interceptor |
| 2873 | * lookup if interceptor failed. |
| 2874 | */ |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2875 | RUNTIME_FUNCTION(Runtime_LoadPropertyWithInterceptor) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2876 | HandleScope scope(isolate); |
| 2877 | DCHECK(args.length() == NamedLoadHandlerCompiler::kInterceptorArgsLength); |
| 2878 | Handle<Name> name = |
| 2879 | args.at<Name>(NamedLoadHandlerCompiler::kInterceptorArgsNameIndex); |
| 2880 | Handle<JSObject> receiver = |
| 2881 | args.at<JSObject>(NamedLoadHandlerCompiler::kInterceptorArgsThisIndex); |
| 2882 | Handle<JSObject> holder = |
| 2883 | args.at<JSObject>(NamedLoadHandlerCompiler::kInterceptorArgsHolderIndex); |
| 2884 | |
| 2885 | Handle<Object> result; |
| 2886 | LookupIterator it(receiver, name, holder); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2887 | // TODO(conradw): Investigate strong mode semantics for this. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2888 | ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, result, |
| 2889 | JSObject::GetProperty(&it)); |
| 2890 | |
| 2891 | if (it.IsFound()) return *result; |
| 2892 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2893 | // Return the undefined result if the reference error should not be thrown. |
| 2894 | // Note that both keyed and non-keyed loads may end up here. |
| 2895 | LoadICNexus nexus(isolate); |
| 2896 | LoadIC ic(IC::NO_EXTRA_FRAME, isolate, &nexus); |
| 2897 | if (!ic.ShouldThrowReferenceError(it.GetReceiver())) { |
| 2898 | return isolate->heap()->undefined_value(); |
| 2899 | } |
| 2900 | |
| 2901 | // Throw a reference error. |
| 2902 | THROW_NEW_ERROR_RETURN_FAILURE( |
| 2903 | isolate, NewReferenceError(MessageTemplate::kNotDefined, it.name())); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2904 | } |
| 2905 | |
| 2906 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2907 | RUNTIME_FUNCTION(Runtime_StorePropertyWithInterceptor) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2908 | HandleScope scope(isolate); |
| 2909 | DCHECK(args.length() == 3); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2910 | StoreICNexus nexus(isolate); |
| 2911 | StoreIC ic(IC::NO_EXTRA_FRAME, isolate, &nexus); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2912 | Handle<JSObject> receiver = args.at<JSObject>(0); |
| 2913 | Handle<Name> name = args.at<Name>(1); |
| 2914 | Handle<Object> value = args.at<Object>(2); |
| 2915 | #ifdef DEBUG |
| 2916 | PrototypeIterator iter(isolate, receiver, |
| 2917 | PrototypeIterator::START_AT_RECEIVER); |
| 2918 | bool found = false; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2919 | for (; !iter.IsAtEnd(PrototypeIterator::END_AT_NON_HIDDEN); iter.Advance()) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2920 | Handle<Object> current = PrototypeIterator::GetCurrent(iter); |
| 2921 | if (current->IsJSObject() && |
| 2922 | Handle<JSObject>::cast(current)->HasNamedInterceptor()) { |
| 2923 | found = true; |
| 2924 | break; |
| 2925 | } |
| 2926 | } |
| 2927 | DCHECK(found); |
| 2928 | #endif |
| 2929 | Handle<Object> result; |
| 2930 | ASSIGN_RETURN_FAILURE_ON_EXCEPTION( |
| 2931 | isolate, result, |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2932 | JSObject::SetProperty(receiver, name, value, ic.language_mode())); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2933 | return *result; |
| 2934 | } |
| 2935 | |
| 2936 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2937 | RUNTIME_FUNCTION(Runtime_LoadElementWithInterceptor) { |
| 2938 | // TODO(verwaest): This should probably get the holder and receiver as input. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2939 | HandleScope scope(isolate); |
| 2940 | Handle<JSObject> receiver = args.at<JSObject>(0); |
| 2941 | DCHECK(args.smi_at(1) >= 0); |
| 2942 | uint32_t index = args.smi_at(1); |
| 2943 | Handle<Object> result; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2944 | // TODO(conradw): Investigate strong mode semantics for this. |
| 2945 | LanguageMode language_mode = SLOPPY; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2946 | ASSIGN_RETURN_FAILURE_ON_EXCEPTION( |
| 2947 | isolate, result, |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2948 | Object::GetElement(isolate, receiver, index, language_mode)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2949 | return *result; |
| 2950 | } |
| 2951 | |
| 2952 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2953 | RUNTIME_FUNCTION(Runtime_LoadIC_MissFromStubFailure) { |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2954 | TimerEventScope<TimerEventIcMiss> timer(isolate); |
| 2955 | HandleScope scope(isolate); |
| 2956 | Handle<Object> receiver = args.at<Object>(0); |
| 2957 | Handle<Name> key = args.at<Name>(1); |
| 2958 | Handle<Object> result; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2959 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2960 | DCHECK(args.length() == 4); |
| 2961 | Handle<Smi> slot = args.at<Smi>(2); |
| 2962 | Handle<TypeFeedbackVector> vector = args.at<TypeFeedbackVector>(3); |
| 2963 | FeedbackVectorSlot vector_slot = vector->ToSlot(slot->value()); |
| 2964 | // A monomorphic or polymorphic KeyedLoadIC with a string key can call the |
| 2965 | // LoadIC miss handler if the handler misses. Since the vector Nexus is |
| 2966 | // set up outside the IC, handle that here. |
| 2967 | if (vector->GetKind(vector_slot) == FeedbackVectorSlotKind::LOAD_IC) { |
| 2968 | LoadICNexus nexus(vector, vector_slot); |
| 2969 | LoadIC ic(IC::EXTRA_CALL_FRAME, isolate, &nexus); |
| 2970 | ic.UpdateState(receiver, key); |
| 2971 | ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, result, ic.Load(receiver, key)); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2972 | } else { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2973 | DCHECK_EQ(FeedbackVectorSlotKind::KEYED_LOAD_IC, |
| 2974 | vector->GetKind(vector_slot)); |
| 2975 | KeyedLoadICNexus nexus(vector, vector_slot); |
| 2976 | KeyedLoadIC ic(IC::EXTRA_CALL_FRAME, isolate, &nexus); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2977 | ic.UpdateState(receiver, key); |
| 2978 | ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, result, ic.Load(receiver, key)); |
| 2979 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2980 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2981 | return *result; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2982 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2983 | } // namespace internal |
| 2984 | } // namespace v8 |