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Side by Side Diff: src/arm64/full-codegen-arm64.cc

Issue 1179893002: Add script context with context-allocated "const this" (Closed) Base URL: https://chromium.googlesource.com/v8/v8@master
Patch Set: Factor out Variable::HasThisName Created 5 years, 6 months ago
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1 // Copyright 2013 the V8 project authors. All rights reserved. 1 // Copyright 2013 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_ARM64 7 #if V8_TARGET_ARCH_ARM64
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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2792 ASM_LOCATION("FullCodeGenerator::EmitResolvePossiblyDirectEval"); 2792 ASM_LOCATION("FullCodeGenerator::EmitResolvePossiblyDirectEval");
2793 // Prepare to push a copy of the first argument or undefined if it doesn't 2793 // Prepare to push a copy of the first argument or undefined if it doesn't
2794 // exist. 2794 // exist.
2795 if (arg_count > 0) { 2795 if (arg_count > 0) {
2796 __ Peek(x9, arg_count * kXRegSize); 2796 __ Peek(x9, arg_count * kXRegSize);
2797 } else { 2797 } else {
2798 __ LoadRoot(x9, Heap::kUndefinedValueRootIndex); 2798 __ LoadRoot(x9, Heap::kUndefinedValueRootIndex);
2799 } 2799 }
2800 2800
2801 __ Ldr(x10, MemOperand(fp, JavaScriptFrameConstants::kFunctionOffset)); 2801 __ Ldr(x10, MemOperand(fp, JavaScriptFrameConstants::kFunctionOffset));
2802 // Prepare to push the receiver of the enclosing function.
2803 Variable* this_var = scope()->LookupThis();
2804 DCHECK_NOT_NULL(this_var);
2805 __ Ldr(x11, VarOperand(this_var, x11));
2806 2802
2807 // Prepare to push the language mode. 2803 // Prepare to push the language mode.
2808 __ Mov(x12, Smi::FromInt(language_mode())); 2804 __ Mov(x11, Smi::FromInt(language_mode()));
2809 // Prepare to push the start position of the scope the calls resides in. 2805 // Prepare to push the start position of the scope the calls resides in.
2810 __ Mov(x13, Smi::FromInt(scope()->start_position())); 2806 __ Mov(x12, Smi::FromInt(scope()->start_position()));
2811 2807
2812 // Push. 2808 // Push.
2813 __ Push(x9, x10, x11, x12, x13); 2809 __ Push(x9, x10, x11, x12);
2814 2810
2815 // Do the runtime call. 2811 // Do the runtime call.
2816 __ CallRuntime(Runtime::kResolvePossiblyDirectEval, 6); 2812 __ CallRuntime(Runtime::kResolvePossiblyDirectEval, 5);
2817 } 2813 }
2818 2814
2819 2815
2820 void FullCodeGenerator::EmitInitializeThisAfterSuper( 2816 void FullCodeGenerator::EmitInitializeThisAfterSuper(
2821 SuperCallReference* super_ref, FeedbackVectorICSlot slot) { 2817 SuperCallReference* super_ref, FeedbackVectorICSlot slot) {
2822 Variable* this_var = super_ref->this_var()->var(); 2818 Variable* this_var = super_ref->this_var()->var();
2823 GetVar(x1, this_var); 2819 GetVar(x1, this_var);
2824 Label uninitialized_this; 2820 Label uninitialized_this;
2825 __ JumpIfRoot(x1, Heap::kTheHoleValueRootIndex, &uninitialized_this); 2821 __ JumpIfRoot(x1, Heap::kTheHoleValueRootIndex, &uninitialized_this);
2826 __ Mov(x0, Operand(this_var->name())); 2822 __ Mov(x0, Operand(this_var->name()));
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2838 // through this function. Avoid early returns. 2834 // through this function. Avoid early returns.
2839 expr->return_is_recorded_ = false; 2835 expr->return_is_recorded_ = false;
2840 #endif 2836 #endif
2841 2837
2842 Comment cmnt(masm_, "[ Call"); 2838 Comment cmnt(masm_, "[ Call");
2843 Expression* callee = expr->expression(); 2839 Expression* callee = expr->expression();
2844 Call::CallType call_type = expr->GetCallType(isolate()); 2840 Call::CallType call_type = expr->GetCallType(isolate());
2845 2841
2846 if (call_type == Call::POSSIBLY_EVAL_CALL) { 2842 if (call_type == Call::POSSIBLY_EVAL_CALL) {
2847 // In a call to eval, we first call RuntimeHidden_ResolvePossiblyDirectEval 2843 // In a call to eval, we first call RuntimeHidden_ResolvePossiblyDirectEval
2848 // to resolve the function we need to call and the receiver of the 2844 // to resolve the function we need to call. Then we call the resolved
2849 // call. Then we call the resolved function using the given 2845 // function using the given arguments.
2850 // arguments.
2851 ZoneList<Expression*>* args = expr->arguments(); 2846 ZoneList<Expression*>* args = expr->arguments();
2852 int arg_count = args->length(); 2847 int arg_count = args->length();
2853 2848
2854 { 2849 {
2855 PreservePositionScope pos_scope(masm()->positions_recorder()); 2850 PreservePositionScope pos_scope(masm()->positions_recorder());
2856 VisitForStackValue(callee); 2851 VisitForStackValue(callee);
2857 __ LoadRoot(x10, Heap::kUndefinedValueRootIndex); 2852 __ LoadRoot(x10, Heap::kUndefinedValueRootIndex);
2858 __ Push(x10); // Reserved receiver slot. 2853 __ Push(x10); // Reserved receiver slot.
2859 2854
2860 // Push the arguments. 2855 // Push the arguments.
2861 for (int i = 0; i < arg_count; i++) { 2856 for (int i = 0; i < arg_count; i++) {
2862 VisitForStackValue(args->at(i)); 2857 VisitForStackValue(args->at(i));
2863 } 2858 }
2864 2859
2865 // Push a copy of the function (found below the arguments) and 2860 // Push a copy of the function (found below the arguments) and
2866 // resolve eval. 2861 // resolve eval.
2867 __ Peek(x10, (arg_count + 1) * kPointerSize); 2862 __ Peek(x10, (arg_count + 1) * kPointerSize);
2868 __ Push(x10); 2863 __ Push(x10);
2869 EmitResolvePossiblyDirectEval(arg_count); 2864 EmitResolvePossiblyDirectEval(arg_count);
2870 2865
2871 // The runtime call returns a pair of values in x0 (function) and 2866 // Touch up the stack with the resolved function.
2872 // x1 (receiver). Touch up the stack with the right values. 2867 __ Poke(x0, (arg_count + 1) * kPointerSize);
2873 __ PokePair(x1, x0, arg_count * kPointerSize);
2874 2868
2875 PrepareForBailoutForId(expr->EvalOrLookupId(), NO_REGISTERS); 2869 PrepareForBailoutForId(expr->EvalOrLookupId(), NO_REGISTERS);
2876 } 2870 }
2877 2871
2878 // Record source position for debugger. 2872 // Record source position for debugger.
2879 SetSourcePosition(expr->position()); 2873 SetSourcePosition(expr->position());
2880 2874
2881 // Call the evaluated function. 2875 // Call the evaluated function.
2882 CallFunctionStub stub(isolate(), arg_count, NO_CALL_FUNCTION_FLAGS); 2876 CallFunctionStub stub(isolate(), arg_count, NO_CALL_FUNCTION_FLAGS);
2883 __ Peek(x1, (arg_count + 1) * kXRegSize); 2877 __ Peek(x1, (arg_count + 1) * kXRegSize);
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4457 4451
4458 if (property != NULL) { 4452 if (property != NULL) {
4459 VisitForStackValue(property->obj()); 4453 VisitForStackValue(property->obj());
4460 VisitForStackValue(property->key()); 4454 VisitForStackValue(property->key());
4461 __ Mov(x10, Smi::FromInt(language_mode())); 4455 __ Mov(x10, Smi::FromInt(language_mode()));
4462 __ Push(x10); 4456 __ Push(x10);
4463 __ InvokeBuiltin(Builtins::DELETE, CALL_FUNCTION); 4457 __ InvokeBuiltin(Builtins::DELETE, CALL_FUNCTION);
4464 context()->Plug(x0); 4458 context()->Plug(x0);
4465 } else if (proxy != NULL) { 4459 } else if (proxy != NULL) {
4466 Variable* var = proxy->var(); 4460 Variable* var = proxy->var();
4467 // Delete of an unqualified identifier is disallowed in strict mode 4461 // Delete of an unqualified identifier is disallowed in strict mode but
4468 // but "delete this" is allowed. 4462 // "delete this" is allowed.
4469 DCHECK(is_sloppy(language_mode()) || var->is_this()); 4463 bool is_this = var->HasThisName(isolate());
4464 DCHECK(is_sloppy(language_mode()) || is_this);
4470 if (var->IsUnallocated()) { 4465 if (var->IsUnallocated()) {
4471 __ Ldr(x12, GlobalObjectMemOperand()); 4466 __ Ldr(x12, GlobalObjectMemOperand());
4472 __ Mov(x11, Operand(var->name())); 4467 __ Mov(x11, Operand(var->name()));
4473 __ Mov(x10, Smi::FromInt(SLOPPY)); 4468 __ Mov(x10, Smi::FromInt(SLOPPY));
4474 __ Push(x12, x11, x10); 4469 __ Push(x12, x11, x10);
4475 __ InvokeBuiltin(Builtins::DELETE, CALL_FUNCTION); 4470 __ InvokeBuiltin(Builtins::DELETE, CALL_FUNCTION);
4476 context()->Plug(x0); 4471 context()->Plug(x0);
4477 } else if (var->IsStackAllocated() || var->IsContextSlot()) { 4472 } else if (var->IsStackAllocated() || var->IsContextSlot()) {
4478 // Result of deleting non-global, non-dynamic variables is false. 4473 // Result of deleting non-global, non-dynamic variables is false.
4479 // The subexpression does not have side effects. 4474 // The subexpression does not have side effects.
4480 context()->Plug(var->is_this()); 4475 context()->Plug(is_this);
4481 } else { 4476 } else {
4482 // Non-global variable. Call the runtime to try to delete from the 4477 // Non-global variable. Call the runtime to try to delete from the
4483 // context where the variable was introduced. 4478 // context where the variable was introduced.
4484 __ Mov(x2, Operand(var->name())); 4479 __ Mov(x2, Operand(var->name()));
4485 __ Push(context_register(), x2); 4480 __ Push(context_register(), x2);
4486 __ CallRuntime(Runtime::kDeleteLookupSlot, 2); 4481 __ CallRuntime(Runtime::kDeleteLookupSlot, 2);
4487 context()->Plug(x0); 4482 context()->Plug(x0);
4488 } 4483 }
4489 } else { 4484 } else {
4490 // Result of deleting non-property, non-variable reference is true. 4485 // Result of deleting non-property, non-variable reference is true.
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5568 } 5563 }
5569 5564
5570 return INTERRUPT; 5565 return INTERRUPT;
5571 } 5566 }
5572 5567
5573 5568
5574 } // namespace internal 5569 } // namespace internal
5575 } // namespace v8 5570 } // namespace v8
5576 5571
5577 #endif // V8_TARGET_ARCH_ARM64 5572 #endif // V8_TARGET_ARCH_ARM64
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