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| 1 // Copyright 2015 the V8 project authors. All rights reserved. | 1 // Copyright 2015 the V8 project authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #include "src/base/platform/elapsed-timer.h" | 5 #include "src/base/platform/elapsed-timer.h" |
| 6 #include "src/signature.h" | 6 #include "src/signature.h" |
| 7 | 7 |
| 8 #include "src/flags.h" | 8 #include "src/flags.h" |
| 9 #include "src/handles.h" | 9 #include "src/handles.h" |
| 10 #include "src/zone-containers.h" | 10 #include "src/zone-containers.h" |
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| 1117 } | 1117 } |
| 1118 TRACE("\n"); | 1118 TRACE("\n"); |
| 1119 ssa_env_ = env; | 1119 ssa_env_ = env; |
| 1120 if (builder_) { | 1120 if (builder_) { |
| 1121 builder_->set_control_ptr(&env->control); | 1121 builder_->set_control_ptr(&env->control); |
| 1122 builder_->set_effect_ptr(&env->effect); | 1122 builder_->set_effect_ptr(&env->effect); |
| 1123 } | 1123 } |
| 1124 } | 1124 } |
| 1125 | 1125 |
| 1126 void Goto(SsaEnv* from, SsaEnv* to) { | 1126 void Goto(SsaEnv* from, SsaEnv* to) { |
| 1127 DCHECK_NOT_NULL(to); | 1127 DCHECK_NOT_nullptr(to); |
|
Michael Starzinger
2016/01/08 12:11:03
Doesn't look right.
| |
| 1128 if (!from->go()) return; | 1128 if (!from->go()) return; |
| 1129 switch (to->state) { | 1129 switch (to->state) { |
| 1130 case SsaEnv::kUnreachable: { // Overwrite destination. | 1130 case SsaEnv::kUnreachable: { // Overwrite destination. |
| 1131 to->state = SsaEnv::kReached; | 1131 to->state = SsaEnv::kReached; |
| 1132 to->locals = from->locals; | 1132 to->locals = from->locals; |
| 1133 to->control = from->control; | 1133 to->control = from->control; |
| 1134 to->effect = from->effect; | 1134 to->effect = from->effect; |
| 1135 break; | 1135 break; |
| 1136 } | 1136 } |
| 1137 case SsaEnv::kReached: { // Create a new merge. | 1137 case SsaEnv::kReached: { // Create a new merge. |
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| 1234 for (int i = EnvironmentCount() - 1; i >= 0; i--) { | 1234 for (int i = EnvironmentCount() - 1; i >= 0; i--) { |
| 1235 env->locals[i] = builder_->Phi(function_env_->GetLocalType(i), 1, | 1235 env->locals[i] = builder_->Phi(function_env_->GetLocalType(i), 1, |
| 1236 &env->locals[i], env->control); | 1236 &env->locals[i], env->control); |
| 1237 } | 1237 } |
| 1238 } | 1238 } |
| 1239 } | 1239 } |
| 1240 } | 1240 } |
| 1241 | 1241 |
| 1242 // Create a complete copy of the {from}. | 1242 // Create a complete copy of the {from}. |
| 1243 SsaEnv* Split(SsaEnv* from) { | 1243 SsaEnv* Split(SsaEnv* from) { |
| 1244 DCHECK_NOT_NULL(from); | 1244 DCHECK_NOT_nullptr(from); |
|
Michael Starzinger
2016/01/08 12:11:03
Doesn't look right.
| |
| 1245 SsaEnv* result = reinterpret_cast<SsaEnv*>(zone_->New(sizeof(SsaEnv))); | 1245 SsaEnv* result = reinterpret_cast<SsaEnv*>(zone_->New(sizeof(SsaEnv))); |
| 1246 size_t size = sizeof(TFNode*) * EnvironmentCount(); | 1246 size_t size = sizeof(TFNode*) * EnvironmentCount(); |
| 1247 result->control = from->control; | 1247 result->control = from->control; |
| 1248 result->effect = from->effect; | 1248 result->effect = from->effect; |
| 1249 result->state = from->state == SsaEnv::kUnreachable ? SsaEnv::kUnreachable | 1249 result->state = from->state == SsaEnv::kUnreachable ? SsaEnv::kUnreachable |
| 1250 : SsaEnv::kReached; | 1250 : SsaEnv::kReached; |
| 1251 | 1251 |
| 1252 if (from->go()) { | 1252 if (from->go()) { |
| 1253 result->state = SsaEnv::kReached; | 1253 result->state = SsaEnv::kReached; |
| 1254 result->locals = | 1254 result->locals = |
| 1255 size > 0 ? reinterpret_cast<TFNode**>(zone_->New(size)) : nullptr; | 1255 size > 0 ? reinterpret_cast<TFNode**>(zone_->New(size)) : nullptr; |
| 1256 memcpy(result->locals, from->locals, size); | 1256 memcpy(result->locals, from->locals, size); |
| 1257 } else { | 1257 } else { |
| 1258 result->state = SsaEnv::kUnreachable; | 1258 result->state = SsaEnv::kUnreachable; |
| 1259 result->locals = nullptr; | 1259 result->locals = nullptr; |
| 1260 } | 1260 } |
| 1261 | 1261 |
| 1262 return result; | 1262 return result; |
| 1263 } | 1263 } |
| 1264 | 1264 |
| 1265 // Create a copy of {from} that steals its state and leaves {from} | 1265 // Create a copy of {from} that steals its state and leaves {from} |
| 1266 // unreachable. | 1266 // unreachable. |
| 1267 SsaEnv* Steal(SsaEnv* from) { | 1267 SsaEnv* Steal(SsaEnv* from) { |
| 1268 DCHECK_NOT_NULL(from); | 1268 DCHECK_NOT_nullptr(from); |
|
Michael Starzinger
2016/01/08 12:11:03
Doesn't look right.
| |
| 1269 if (!from->go()) return UnreachableEnv(); | 1269 if (!from->go()) return UnreachableEnv(); |
| 1270 SsaEnv* result = reinterpret_cast<SsaEnv*>(zone_->New(sizeof(SsaEnv))); | 1270 SsaEnv* result = reinterpret_cast<SsaEnv*>(zone_->New(sizeof(SsaEnv))); |
| 1271 result->state = SsaEnv::kReached; | 1271 result->state = SsaEnv::kReached; |
| 1272 result->locals = from->locals; | 1272 result->locals = from->locals; |
| 1273 result->control = from->control; | 1273 result->control = from->control; |
| 1274 result->effect = from->effect; | 1274 result->effect = from->effect; |
| 1275 from->Kill(SsaEnv::kUnreachable); | 1275 from->Kill(SsaEnv::kUnreachable); |
| 1276 return result; | 1276 return result; |
| 1277 } | 1277 } |
| 1278 | 1278 |
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| 1574 FOREACH_MISC_MEM_OPCODE(DECLARE_OPCODE_CASE) | 1574 FOREACH_MISC_MEM_OPCODE(DECLARE_OPCODE_CASE) |
| 1575 FOREACH_SIMPLE_OPCODE(DECLARE_OPCODE_CASE) | 1575 FOREACH_SIMPLE_OPCODE(DECLARE_OPCODE_CASE) |
| 1576 #undef DECLARE_OPCODE_CASE | 1576 #undef DECLARE_OPCODE_CASE |
| 1577 } | 1577 } |
| 1578 UNREACHABLE(); | 1578 UNREACHABLE(); |
| 1579 return 0; | 1579 return 0; |
| 1580 } | 1580 } |
| 1581 } // namespace wasm | 1581 } // namespace wasm |
| 1582 } // namespace internal | 1582 } // namespace internal |
| 1583 } // namespace v8 | 1583 } // namespace v8 |
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