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Issue 16136011: Generator object "next" method takes optional send value (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: rebased onto master Created 7 years, 6 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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2022 break; 2022 break;
2023 } 2023 }
2024 2024
2025 case Yield::DELEGATING: { 2025 case Yield::DELEGATING: {
2026 VisitForStackValue(expr->generator_object()); 2026 VisitForStackValue(expr->generator_object());
2027 2027
2028 // Initial stack layout is as follows: 2028 // Initial stack layout is as follows:
2029 // [sp + 1 * kPointerSize] iter 2029 // [sp + 1 * kPointerSize] iter
2030 // [sp + 0 * kPointerSize] g 2030 // [sp + 0 * kPointerSize] g
2031 2031
2032 Label l_catch, l_try, l_resume, l_send, l_call, l_loop; 2032 Label l_catch, l_try, l_resume, l_next, l_call, l_loop;
2033 // Initial send value is undefined. 2033 // Initial send value is undefined.
2034 __ LoadRoot(r0, Heap::kUndefinedValueRootIndex); 2034 __ LoadRoot(r0, Heap::kUndefinedValueRootIndex);
2035 __ b(&l_send); 2035 __ b(&l_next);
2036 2036
2037 // catch (e) { receiver = iter; f = iter.throw; arg = e; goto l_call; } 2037 // catch (e) { receiver = iter; f = iter.throw; arg = e; goto l_call; }
2038 __ bind(&l_catch); 2038 __ bind(&l_catch);
2039 handler_table()->set(expr->index(), Smi::FromInt(l_catch.pos())); 2039 handler_table()->set(expr->index(), Smi::FromInt(l_catch.pos()));
2040 __ ldr(r3, MemOperand(sp, 1 * kPointerSize)); // iter 2040 __ ldr(r3, MemOperand(sp, 1 * kPointerSize)); // iter
2041 __ push(r3); // iter 2041 __ push(r3); // iter
2042 __ push(r0); // exception 2042 __ push(r0); // exception
2043 __ mov(r0, r3); // iter 2043 __ mov(r0, r3); // iter
2044 __ LoadRoot(r2, Heap::kthrow_stringRootIndex); // "throw" 2044 __ LoadRoot(r2, Heap::kthrow_stringRootIndex); // "throw"
2045 Handle<Code> throw_ic = isolate()->builtins()->LoadIC_Initialize(); 2045 Handle<Code> throw_ic = isolate()->builtins()->LoadIC_Initialize();
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2056 __ push(r3); // g 2056 __ push(r3); // g
2057 __ CallRuntime(Runtime::kSuspendJSGeneratorObject, 1); 2057 __ CallRuntime(Runtime::kSuspendJSGeneratorObject, 1);
2058 __ ldr(context_register(), 2058 __ ldr(context_register(),
2059 MemOperand(fp, StandardFrameConstants::kContextOffset)); 2059 MemOperand(fp, StandardFrameConstants::kContextOffset));
2060 __ CompareRoot(r0, Heap::kTheHoleValueRootIndex); 2060 __ CompareRoot(r0, Heap::kTheHoleValueRootIndex);
2061 __ b(ne, &l_resume); 2061 __ b(ne, &l_resume);
2062 EmitReturnIteratorResult(false); 2062 EmitReturnIteratorResult(false);
2063 __ bind(&l_resume); // received in r0 2063 __ bind(&l_resume); // received in r0
2064 __ PopTryHandler(); 2064 __ PopTryHandler();
2065 2065
2066 // receiver = iter; f = iter.send; arg = received; 2066 // receiver = iter; f = iter.next; arg = received;
2067 __ bind(&l_send); 2067 __ bind(&l_next);
2068 __ ldr(r3, MemOperand(sp, 1 * kPointerSize)); // iter 2068 __ ldr(r3, MemOperand(sp, 1 * kPointerSize)); // iter
2069 __ push(r3); // iter 2069 __ push(r3); // iter
2070 __ push(r0); // received 2070 __ push(r0); // received
2071 __ mov(r0, r3); // iter 2071 __ mov(r0, r3); // iter
2072 __ LoadRoot(r2, Heap::ksend_stringRootIndex); // "send" 2072 __ LoadRoot(r2, Heap::knext_stringRootIndex); // "next"
2073 Handle<Code> send_ic = isolate()->builtins()->LoadIC_Initialize(); 2073 Handle<Code> next_ic = isolate()->builtins()->LoadIC_Initialize();
2074 CallIC(send_ic); // iter.send in r0 2074 CallIC(next_ic); // iter.next in r0
2075 2075
2076 // result = f.call(receiver, arg); 2076 // result = f.call(receiver, arg);
2077 __ bind(&l_call); 2077 __ bind(&l_call);
2078 Label l_call_runtime; 2078 Label l_call_runtime;
2079 __ JumpIfSmi(r0, &l_call_runtime); 2079 __ JumpIfSmi(r0, &l_call_runtime);
2080 __ CompareObjectType(r0, r1, r1, JS_FUNCTION_TYPE); 2080 __ CompareObjectType(r0, r1, r1, JS_FUNCTION_TYPE);
2081 __ b(ne, &l_call_runtime); 2081 __ b(ne, &l_call_runtime);
2082 __ mov(r1, r0); 2082 __ mov(r1, r0);
2083 ParameterCount count(1); 2083 ParameterCount count(1);
2084 __ InvokeFunction(r1, count, CALL_FUNCTION, 2084 __ InvokeFunction(r1, count, CALL_FUNCTION,
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2167 __ push(cp); // Callee's context. 2167 __ push(cp); // Callee's context.
2168 __ push(r4); // Callee's JS Function. 2168 __ push(r4); // Callee's JS Function.
2169 2169
2170 // Load the operand stack size. 2170 // Load the operand stack size.
2171 __ ldr(r3, FieldMemOperand(r1, JSGeneratorObject::kOperandStackOffset)); 2171 __ ldr(r3, FieldMemOperand(r1, JSGeneratorObject::kOperandStackOffset));
2172 __ ldr(r3, FieldMemOperand(r3, FixedArray::kLengthOffset)); 2172 __ ldr(r3, FieldMemOperand(r3, FixedArray::kLengthOffset));
2173 __ SmiUntag(r3); 2173 __ SmiUntag(r3);
2174 2174
2175 // If we are sending a value and there is no operand stack, we can jump back 2175 // If we are sending a value and there is no operand stack, we can jump back
2176 // in directly. 2176 // in directly.
2177 if (resume_mode == JSGeneratorObject::SEND) { 2177 if (resume_mode == JSGeneratorObject::NEXT) {
2178 Label slow_resume; 2178 Label slow_resume;
2179 __ cmp(r3, Operand(0)); 2179 __ cmp(r3, Operand(0));
2180 __ b(ne, &slow_resume); 2180 __ b(ne, &slow_resume);
2181 __ ldr(r3, FieldMemOperand(r4, JSFunction::kCodeEntryOffset)); 2181 __ ldr(r3, FieldMemOperand(r4, JSFunction::kCodeEntryOffset));
2182 __ ldr(r2, FieldMemOperand(r1, JSGeneratorObject::kContinuationOffset)); 2182 __ ldr(r2, FieldMemOperand(r1, JSGeneratorObject::kContinuationOffset));
2183 __ SmiUntag(r2); 2183 __ SmiUntag(r2);
2184 __ add(r3, r3, r2); 2184 __ add(r3, r3, r2);
2185 __ mov(r2, Operand(Smi::FromInt(JSGeneratorObject::kGeneratorExecuting))); 2185 __ mov(r2, Operand(Smi::FromInt(JSGeneratorObject::kGeneratorExecuting)));
2186 __ str(r2, FieldMemOperand(r1, JSGeneratorObject::kContinuationOffset)); 2186 __ str(r2, FieldMemOperand(r1, JSGeneratorObject::kContinuationOffset));
2187 __ Jump(r3); 2187 __ Jump(r3);
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4929 *context_length = 0; 4929 *context_length = 0;
4930 return previous_; 4930 return previous_;
4931 } 4931 }
4932 4932
4933 4933
4934 #undef __ 4934 #undef __
4935 4935
4936 } } // namespace v8::internal 4936 } } // namespace v8::internal
4937 4937
4938 #endif // V8_TARGET_ARCH_ARM 4938 #endif // V8_TARGET_ARCH_ARM
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