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Issue 23533003: Implement fixpoint iteration for escape analysis. (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Put behind a flag. Created 7 years, 2 months ago
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1 // Copyright 2012 the V8 project authors. All rights reserved. 1 // Copyright 2012 the V8 project authors. All rights reserved.
2 // Redistribution and use in source and binary forms, with or without 2 // Redistribution and use in source and binary forms, with or without
3 // modification, are permitted provided that the following conditions are 3 // modification, are permitted provided that the following conditions are
4 // met: 4 // met:
5 // 5 //
6 // * Redistributions of source code must retain the above copyright 6 // * Redistributions of source code must retain the above copyright
7 // notice, this list of conditions and the following disclaimer. 7 // notice, this list of conditions and the following disclaimer.
8 // * Redistributions in binary form must reproduce the above 8 // * Redistributions in binary form must reproduce the above
9 // copyright notice, this list of conditions and the following 9 // copyright notice, this list of conditions and the following
10 // disclaimer in the documentation and/or other materials provided 10 // disclaimer in the documentation and/or other materials provided
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2318 HValue* value = values()->at(i); 2318 HValue* value = values()->at(i);
2319 if (HasAssignedIndexAt(i)) { 2319 if (HasAssignedIndexAt(i)) {
2320 env->Bind(GetAssignedIndexAt(i), value); 2320 env->Bind(GetAssignedIndexAt(i), value);
2321 } else { 2321 } else {
2322 env->Push(value); 2322 env->Push(value);
2323 } 2323 }
2324 } 2324 }
2325 } 2325 }
2326 2326
2327 2327
2328 static void ReplayEnvironmentNested(const ZoneList<HValue*>* values,
2329 HCapturedObject* other) {
2330 for (int i = 0; i < values->length(); ++i) {
2331 HValue* value = values->at(i);
2332 if (value->IsCapturedObject()) {
2333 if (HCapturedObject::cast(value)->capture_id() == other->capture_id()) {
2334 values->at(i) = other;
2335 } else {
2336 ReplayEnvironmentNested(HCapturedObject::cast(value)->values(), other);
2337 }
2338 }
2339 }
2340 }
2341
2342
2328 // Replay captured objects by replacing all captured objects with the 2343 // Replay captured objects by replacing all captured objects with the
2329 // same capture id in the current and all outer environments. 2344 // same capture id in the current and all outer environments.
2330 void HCapturedObject::ReplayEnvironment(HEnvironment* env) { 2345 void HCapturedObject::ReplayEnvironment(HEnvironment* env) {
2331 ASSERT(env != NULL); 2346 ASSERT(env != NULL);
2332 while (env != NULL) { 2347 while (env != NULL) {
2333 for (int i = 0; i < env->length(); ++i) { 2348 ReplayEnvironmentNested(env->values(), this);
2334 HValue* value = env->values()->at(i);
2335 if (value->IsCapturedObject() &&
2336 HCapturedObject::cast(value)->capture_id() == this->capture_id()) {
2337 env->SetValueAt(i, this);
2338 }
2339 }
2340 env = env->outer(); 2349 env = env->outer();
2341 } 2350 }
2342 } 2351 }
2343 2352
2344 2353
2354 void HCapturedObject::PrintDataTo(StringStream* stream) {
2355 stream->Add("#%d ", capture_id());
2356 HDematerializedObject::PrintDataTo(stream);
2357 }
2358
2359
2345 void HEnterInlined::RegisterReturnTarget(HBasicBlock* return_target, 2360 void HEnterInlined::RegisterReturnTarget(HBasicBlock* return_target,
2346 Zone* zone) { 2361 Zone* zone) {
2347 ASSERT(return_target->IsInlineReturnTarget()); 2362 ASSERT(return_target->IsInlineReturnTarget());
2348 return_targets_.Add(return_target, zone); 2363 return_targets_.Add(return_target, zone);
2349 } 2364 }
2350 2365
2351 2366
2352 void HEnterInlined::PrintDataTo(StringStream* stream) { 2367 void HEnterInlined::PrintDataTo(StringStream* stream) {
2353 SmartArrayPointer<char> name = function()->debug_name()->ToCString(); 2368 SmartArrayPointer<char> name = function()->debug_name()->ToCString();
2354 stream->Add("%s, id=%d", *name, function()->id().ToInt()); 2369 stream->Add("%s, id=%d", *name, function()->id().ToInt());
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4199 break; 4214 break;
4200 case kExternalMemory: 4215 case kExternalMemory:
4201 stream->Add("[external-memory]"); 4216 stream->Add("[external-memory]");
4202 break; 4217 break;
4203 } 4218 }
4204 4219
4205 stream->Add("@%d", offset()); 4220 stream->Add("@%d", offset());
4206 } 4221 }
4207 4222
4208 } } // namespace v8::internal 4223 } } // namespace v8::internal
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