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Issue 1136073002: Resolve references to "this" the same way as normal variables (Closed) Base URL: https://chromium.googlesource.com/v8/v8@master
Patch Set: "this" should never be looked up dynamically Created 5 years, 7 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 // 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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203 __ CallRuntime(Runtime::kNewFunctionContext, 1); 203 __ CallRuntime(Runtime::kNewFunctionContext, 1);
204 } 204 }
205 function_in_register = false; 205 function_in_register = false;
206 // Context is returned in eax. It replaces the context passed to us. 206 // Context is returned in eax. It replaces the context passed to us.
207 // It's saved in the stack and kept live in esi. 207 // It's saved in the stack and kept live in esi.
208 __ mov(esi, eax); 208 __ mov(esi, eax);
209 __ mov(Operand(ebp, StandardFrameConstants::kContextOffset), eax); 209 __ mov(Operand(ebp, StandardFrameConstants::kContextOffset), eax);
210 210
211 // Copy parameters into context if necessary. 211 // Copy parameters into context if necessary.
212 int num_parameters = info->scope()->num_parameters(); 212 int num_parameters = info->scope()->num_parameters();
213 for (int i = 0; i < num_parameters; i++) { 213 int first_parameter = info->scope()->has_this_declaration() ? -1 : 0;
214 Variable* var = scope()->parameter(i); 214 for (int i = first_parameter; i < num_parameters; i++) {
215 Variable* var = (i == -1) ? scope()->receiver() : scope()->parameter(i);
215 if (var->IsContextSlot()) { 216 if (var->IsContextSlot()) {
216 int parameter_offset = StandardFrameConstants::kCallerSPOffset + 217 int parameter_offset = StandardFrameConstants::kCallerSPOffset +
217 (num_parameters - 1 - i) * kPointerSize; 218 (num_parameters - 1 - i) * kPointerSize;
218 // Load parameter from stack. 219 // Load parameter from stack.
219 __ mov(eax, Operand(ebp, parameter_offset)); 220 __ mov(eax, Operand(ebp, parameter_offset));
220 // Store it in the context. 221 // Store it in the context.
221 int context_offset = Context::SlotOffset(var->index()); 222 int context_offset = Context::SlotOffset(var->index());
222 __ mov(Operand(esi, context_offset), eax); 223 __ mov(Operand(esi, context_offset), eax);
223 // Update the write barrier. This clobbers eax and ebx. 224 // Update the write barrier. This clobbers eax and ebx.
224 if (need_write_barrier) { 225 if (need_write_barrier) {
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2952 // Push copy of the first argument or undefined if it doesn't exist. 2953 // Push copy of the first argument or undefined if it doesn't exist.
2953 if (arg_count > 0) { 2954 if (arg_count > 0) {
2954 __ push(Operand(esp, arg_count * kPointerSize)); 2955 __ push(Operand(esp, arg_count * kPointerSize));
2955 } else { 2956 } else {
2956 __ push(Immediate(isolate()->factory()->undefined_value())); 2957 __ push(Immediate(isolate()->factory()->undefined_value()));
2957 } 2958 }
2958 2959
2959 // Push the enclosing function. 2960 // Push the enclosing function.
2960 __ push(Operand(ebp, JavaScriptFrameConstants::kFunctionOffset)); 2961 __ push(Operand(ebp, JavaScriptFrameConstants::kFunctionOffset));
2961 // Push the receiver of the enclosing function. 2962 // Push the receiver of the enclosing function.
2962 __ push(Operand(ebp, (2 + info_->scope()->num_parameters()) * kPointerSize)); 2963 Variable* this_var = scope()->LookupThis();
2964 DCHECK_NOT_NULL(this_var);
2965 __ push(VarOperand(this_var, ecx));
2963 // Push the language mode. 2966 // Push the language mode.
2964 __ push(Immediate(Smi::FromInt(language_mode()))); 2967 __ push(Immediate(Smi::FromInt(language_mode())));
2965 2968
2966 // Push the start position of the scope the calls resides in. 2969 // Push the start position of the scope the calls resides in.
2967 __ push(Immediate(Smi::FromInt(scope()->start_position()))); 2970 __ push(Immediate(Smi::FromInt(scope()->start_position())));
2968 2971
2969 // Do the runtime call. 2972 // Do the runtime call.
2970 __ CallRuntime(Runtime::kResolvePossiblyDirectEval, 6); 2973 __ CallRuntime(Runtime::kResolvePossiblyDirectEval, 6);
2971 } 2974 }
2972 2975
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5372 DCHECK_EQ(isolate->builtins()->OsrAfterStackCheck()->entry(), 5375 DCHECK_EQ(isolate->builtins()->OsrAfterStackCheck()->entry(),
5373 Assembler::target_address_at(call_target_address, 5376 Assembler::target_address_at(call_target_address,
5374 unoptimized_code)); 5377 unoptimized_code));
5375 return OSR_AFTER_STACK_CHECK; 5378 return OSR_AFTER_STACK_CHECK;
5376 } 5379 }
5377 5380
5378 5381
5379 } } // namespace v8::internal 5382 } } // namespace v8::internal
5380 5383
5381 #endif // V8_TARGET_ARCH_IA32 5384 #endif // V8_TARGET_ARCH_IA32
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