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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 // 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/v8.h" | 5 #include "src/v8.h" |
6 | 6 |
7 #if V8_TARGET_ARCH_IA32 | 7 #if V8_TARGET_ARCH_IA32 |
8 | 8 |
9 #include "src/code-factory.h" | 9 #include "src/code-factory.h" |
10 #include "src/code-stubs.h" | 10 #include "src/code-stubs.h" |
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1038 FeedbackVectorSlot slot = stmt->ForInFeedbackSlot(); | 1038 FeedbackVectorSlot slot = stmt->ForInFeedbackSlot(); |
1039 | 1039 |
1040 SetStatementPosition(stmt); | 1040 SetStatementPosition(stmt); |
1041 | 1041 |
1042 Label loop, exit; | 1042 Label loop, exit; |
1043 ForIn loop_statement(this, stmt); | 1043 ForIn loop_statement(this, stmt); |
1044 increment_loop_depth(); | 1044 increment_loop_depth(); |
1045 | 1045 |
1046 // Get the object to enumerate over. If the object is null or undefined, skip | 1046 // Get the object to enumerate over. If the object is null or undefined, skip |
1047 // over the loop. See ECMA-262 version 5, section 12.6.4. | 1047 // over the loop. See ECMA-262 version 5, section 12.6.4. |
1048 SetExpressionPosition(stmt->enumerable()); | |
1049 VisitForAccumulatorValue(stmt->enumerable()); | 1048 VisitForAccumulatorValue(stmt->enumerable()); |
1050 __ cmp(eax, isolate()->factory()->undefined_value()); | 1049 __ cmp(eax, isolate()->factory()->undefined_value()); |
1051 __ j(equal, &exit); | 1050 __ j(equal, &exit); |
1052 __ cmp(eax, isolate()->factory()->null_value()); | 1051 __ cmp(eax, isolate()->factory()->null_value()); |
1053 __ j(equal, &exit); | 1052 __ j(equal, &exit); |
1054 | 1053 |
1055 PrepareForBailoutForId(stmt->PrepareId(), TOS_REG); | 1054 PrepareForBailoutForId(stmt->PrepareId(), TOS_REG); |
1056 | 1055 |
1057 // Convert the object to a JS object. | 1056 // Convert the object to a JS object. |
1058 Label convert, done_convert; | 1057 Label convert, done_convert; |
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1174 __ test(eax, eax); | 1173 __ test(eax, eax); |
1175 __ j(equal, loop_statement.continue_label()); | 1174 __ j(equal, loop_statement.continue_label()); |
1176 __ mov(ebx, eax); | 1175 __ mov(ebx, eax); |
1177 | 1176 |
1178 // Update the 'each' property or variable from the possibly filtered | 1177 // Update the 'each' property or variable from the possibly filtered |
1179 // entry in register ebx. | 1178 // entry in register ebx. |
1180 __ bind(&update_each); | 1179 __ bind(&update_each); |
1181 __ mov(result_register(), ebx); | 1180 __ mov(result_register(), ebx); |
1182 // Perform the assignment as if via '='. | 1181 // Perform the assignment as if via '='. |
1183 { EffectContext context(this); | 1182 { EffectContext context(this); |
1184 SetExpressionPosition(stmt->each()); | |
1185 EmitAssignment(stmt->each()); | 1183 EmitAssignment(stmt->each()); |
1186 } | 1184 } |
1187 | 1185 |
1188 // Generate code for the body of the loop. | 1186 // Generate code for the body of the loop. |
1189 Visit(stmt->body()); | 1187 Visit(stmt->body()); |
1190 | 1188 |
1191 // Generate code for going to the next element by incrementing the | 1189 // Generate code for going to the next element by incrementing the |
1192 // index (smi) stored on top of the stack. | 1190 // index (smi) stored on top of the stack. |
1193 __ bind(loop_statement.continue_label()); | 1191 __ bind(loop_statement.continue_label()); |
1194 __ add(Operand(esp, 0 * kPointerSize), Immediate(Smi::FromInt(1))); | 1192 __ add(Operand(esp, 0 * kPointerSize), Immediate(Smi::FromInt(1))); |
1195 | 1193 |
1196 EmitBackEdgeBookkeeping(stmt, &loop); | 1194 EmitBackEdgeBookkeeping(stmt, &loop); |
1197 __ jmp(&loop); | 1195 __ jmp(&loop); |
1198 | 1196 |
1199 // Remove the pointers stored on the stack. | 1197 // Remove the pointers stored on the stack. |
1200 __ bind(loop_statement.break_label()); | 1198 __ bind(loop_statement.break_label()); |
1201 __ add(esp, Immediate(5 * kPointerSize)); | 1199 __ add(esp, Immediate(5 * kPointerSize)); |
1202 | 1200 |
1203 // Exit and decrement the loop depth. | 1201 // Exit and decrement the loop depth. |
1204 PrepareForBailoutForId(stmt->ExitId(), NO_REGISTERS); | 1202 PrepareForBailoutForId(stmt->ExitId(), NO_REGISTERS); |
1205 __ bind(&exit); | 1203 __ bind(&exit); |
1206 decrement_loop_depth(); | 1204 decrement_loop_depth(); |
1207 } | 1205 } |
1208 | 1206 |
1209 | 1207 |
| 1208 void FullCodeGenerator::VisitForOfStatement(ForOfStatement* stmt) { |
| 1209 Comment cmnt(masm_, "[ ForOfStatement"); |
| 1210 SetStatementPosition(stmt); |
| 1211 |
| 1212 Iteration loop_statement(this, stmt); |
| 1213 increment_loop_depth(); |
| 1214 |
| 1215 // var iterator = iterable[Symbol.iterator](); |
| 1216 VisitForEffect(stmt->assign_iterator()); |
| 1217 |
| 1218 // Loop entry. |
| 1219 __ bind(loop_statement.continue_label()); |
| 1220 |
| 1221 // result = iterator.next() |
| 1222 VisitForEffect(stmt->next_result()); |
| 1223 |
| 1224 // if (result.done) break; |
| 1225 Label result_not_done; |
| 1226 VisitForControl(stmt->result_done(), |
| 1227 loop_statement.break_label(), |
| 1228 &result_not_done, |
| 1229 &result_not_done); |
| 1230 __ bind(&result_not_done); |
| 1231 |
| 1232 // each = result.value |
| 1233 VisitForEffect(stmt->assign_each()); |
| 1234 |
| 1235 // Generate code for the body of the loop. |
| 1236 Visit(stmt->body()); |
| 1237 |
| 1238 // Check stack before looping. |
| 1239 PrepareForBailoutForId(stmt->BackEdgeId(), NO_REGISTERS); |
| 1240 EmitBackEdgeBookkeeping(stmt, loop_statement.continue_label()); |
| 1241 __ jmp(loop_statement.continue_label()); |
| 1242 |
| 1243 // Exit and decrement the loop depth. |
| 1244 PrepareForBailoutForId(stmt->ExitId(), NO_REGISTERS); |
| 1245 __ bind(loop_statement.break_label()); |
| 1246 decrement_loop_depth(); |
| 1247 } |
| 1248 |
| 1249 |
1210 void FullCodeGenerator::EmitNewClosure(Handle<SharedFunctionInfo> info, | 1250 void FullCodeGenerator::EmitNewClosure(Handle<SharedFunctionInfo> info, |
1211 bool pretenure) { | 1251 bool pretenure) { |
1212 // Use the fast case closure allocation code that allocates in new | 1252 // Use the fast case closure allocation code that allocates in new |
1213 // space for nested functions that don't need literals cloning. If | 1253 // space for nested functions that don't need literals cloning. If |
1214 // we're running with the --always-opt or the --prepare-always-opt | 1254 // we're running with the --always-opt or the --prepare-always-opt |
1215 // flag, we need to use the runtime function so that the new function | 1255 // flag, we need to use the runtime function so that the new function |
1216 // we are creating here gets a chance to have its code optimized and | 1256 // we are creating here gets a chance to have its code optimized and |
1217 // doesn't just get a copy of the existing unoptimized code. | 1257 // doesn't just get a copy of the existing unoptimized code. |
1218 if (!FLAG_always_opt && | 1258 if (!FLAG_always_opt && |
1219 !FLAG_prepare_always_opt && | 1259 !FLAG_prepare_always_opt && |
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5178 DCHECK_EQ(isolate->builtins()->OsrAfterStackCheck()->entry(), | 5218 DCHECK_EQ(isolate->builtins()->OsrAfterStackCheck()->entry(), |
5179 Assembler::target_address_at(call_target_address, | 5219 Assembler::target_address_at(call_target_address, |
5180 unoptimized_code)); | 5220 unoptimized_code)); |
5181 return OSR_AFTER_STACK_CHECK; | 5221 return OSR_AFTER_STACK_CHECK; |
5182 } | 5222 } |
5183 | 5223 |
5184 | 5224 |
5185 } } // namespace v8::internal | 5225 } } // namespace v8::internal |
5186 | 5226 |
5187 #endif // V8_TARGET_ARCH_IA32 | 5227 #endif // V8_TARGET_ARCH_IA32 |
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