26eae0c429
BUG= R=ishell@chromium.org Review URL: https://codereview.chromium.org/352173006 git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22117 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
1561 lines
54 KiB
C++
1561 lines
54 KiB
C++
// Copyright 2012 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "src/v8.h"
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#if V8_TARGET_ARCH_ARM
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#include "src/codegen.h"
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#include "src/debug.h"
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#include "src/deoptimizer.h"
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#include "src/full-codegen.h"
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#include "src/runtime.h"
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#include "src/stub-cache.h"
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namespace v8 {
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namespace internal {
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#define __ ACCESS_MASM(masm)
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void Builtins::Generate_Adaptor(MacroAssembler* masm,
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CFunctionId id,
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BuiltinExtraArguments extra_args) {
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// ----------- S t a t e -------------
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// -- r0 : number of arguments excluding receiver
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// -- r1 : called function (only guaranteed when
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// extra_args requires it)
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// -- cp : context
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// -- sp[0] : last argument
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// -- ...
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// -- sp[4 * (argc - 1)] : first argument (argc == r0)
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// -- sp[4 * argc] : receiver
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// -----------------------------------
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// Insert extra arguments.
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int num_extra_args = 0;
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if (extra_args == NEEDS_CALLED_FUNCTION) {
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num_extra_args = 1;
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__ push(r1);
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} else {
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ASSERT(extra_args == NO_EXTRA_ARGUMENTS);
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}
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// JumpToExternalReference expects r0 to contain the number of arguments
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// including the receiver and the extra arguments.
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__ add(r0, r0, Operand(num_extra_args + 1));
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__ JumpToExternalReference(ExternalReference(id, masm->isolate()));
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}
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// Load the built-in InternalArray function from the current context.
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static void GenerateLoadInternalArrayFunction(MacroAssembler* masm,
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Register result) {
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// Load the native context.
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__ ldr(result,
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MemOperand(cp, Context::SlotOffset(Context::GLOBAL_OBJECT_INDEX)));
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__ ldr(result,
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FieldMemOperand(result, GlobalObject::kNativeContextOffset));
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// Load the InternalArray function from the native context.
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__ ldr(result,
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MemOperand(result,
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Context::SlotOffset(
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Context::INTERNAL_ARRAY_FUNCTION_INDEX)));
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}
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// Load the built-in Array function from the current context.
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static void GenerateLoadArrayFunction(MacroAssembler* masm, Register result) {
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// Load the native context.
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__ ldr(result,
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MemOperand(cp, Context::SlotOffset(Context::GLOBAL_OBJECT_INDEX)));
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__ ldr(result,
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FieldMemOperand(result, GlobalObject::kNativeContextOffset));
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// Load the Array function from the native context.
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__ ldr(result,
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MemOperand(result,
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Context::SlotOffset(Context::ARRAY_FUNCTION_INDEX)));
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}
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void Builtins::Generate_InternalArrayCode(MacroAssembler* masm) {
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// ----------- S t a t e -------------
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// -- r0 : number of arguments
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// -- lr : return address
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// -- sp[...]: constructor arguments
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// -----------------------------------
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Label generic_array_code, one_or_more_arguments, two_or_more_arguments;
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// Get the InternalArray function.
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GenerateLoadInternalArrayFunction(masm, r1);
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if (FLAG_debug_code) {
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// Initial map for the builtin InternalArray functions should be maps.
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__ ldr(r2, FieldMemOperand(r1, JSFunction::kPrototypeOrInitialMapOffset));
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__ SmiTst(r2);
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__ Assert(ne, kUnexpectedInitialMapForInternalArrayFunction);
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__ CompareObjectType(r2, r3, r4, MAP_TYPE);
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__ Assert(eq, kUnexpectedInitialMapForInternalArrayFunction);
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}
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// Run the native code for the InternalArray function called as a normal
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// function.
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// tail call a stub
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InternalArrayConstructorStub stub(masm->isolate());
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__ TailCallStub(&stub);
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}
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void Builtins::Generate_ArrayCode(MacroAssembler* masm) {
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// ----------- S t a t e -------------
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// -- r0 : number of arguments
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// -- lr : return address
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// -- sp[...]: constructor arguments
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// -----------------------------------
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Label generic_array_code, one_or_more_arguments, two_or_more_arguments;
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// Get the Array function.
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GenerateLoadArrayFunction(masm, r1);
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if (FLAG_debug_code) {
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// Initial map for the builtin Array functions should be maps.
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__ ldr(r2, FieldMemOperand(r1, JSFunction::kPrototypeOrInitialMapOffset));
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__ SmiTst(r2);
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__ Assert(ne, kUnexpectedInitialMapForArrayFunction);
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__ CompareObjectType(r2, r3, r4, MAP_TYPE);
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__ Assert(eq, kUnexpectedInitialMapForArrayFunction);
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}
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// Run the native code for the Array function called as a normal function.
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// tail call a stub
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__ LoadRoot(r2, Heap::kUndefinedValueRootIndex);
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ArrayConstructorStub stub(masm->isolate());
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__ TailCallStub(&stub);
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}
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void Builtins::Generate_StringConstructCode(MacroAssembler* masm) {
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// ----------- S t a t e -------------
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// -- r0 : number of arguments
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// -- r1 : constructor function
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// -- lr : return address
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// -- sp[(argc - n - 1) * 4] : arg[n] (zero based)
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// -- sp[argc * 4] : receiver
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// -----------------------------------
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Counters* counters = masm->isolate()->counters();
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__ IncrementCounter(counters->string_ctor_calls(), 1, r2, r3);
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Register function = r1;
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if (FLAG_debug_code) {
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__ LoadGlobalFunction(Context::STRING_FUNCTION_INDEX, r2);
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__ cmp(function, Operand(r2));
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__ Assert(eq, kUnexpectedStringFunction);
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}
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// Load the first arguments in r0 and get rid of the rest.
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Label no_arguments;
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__ cmp(r0, Operand::Zero());
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__ b(eq, &no_arguments);
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// First args = sp[(argc - 1) * 4].
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__ sub(r0, r0, Operand(1));
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__ ldr(r0, MemOperand(sp, r0, LSL, kPointerSizeLog2, PreIndex));
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// sp now point to args[0], drop args[0] + receiver.
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__ Drop(2);
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Register argument = r2;
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Label not_cached, argument_is_string;
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__ LookupNumberStringCache(r0, // Input.
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argument, // Result.
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r3, // Scratch.
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r4, // Scratch.
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r5, // Scratch.
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¬_cached);
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__ IncrementCounter(counters->string_ctor_cached_number(), 1, r3, r4);
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__ bind(&argument_is_string);
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// ----------- S t a t e -------------
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// -- r2 : argument converted to string
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// -- r1 : constructor function
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// -- lr : return address
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// -----------------------------------
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Label gc_required;
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__ Allocate(JSValue::kSize,
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r0, // Result.
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r3, // Scratch.
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r4, // Scratch.
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&gc_required,
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TAG_OBJECT);
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// Initialising the String Object.
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Register map = r3;
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__ LoadGlobalFunctionInitialMap(function, map, r4);
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if (FLAG_debug_code) {
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__ ldrb(r4, FieldMemOperand(map, Map::kInstanceSizeOffset));
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__ cmp(r4, Operand(JSValue::kSize >> kPointerSizeLog2));
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__ Assert(eq, kUnexpectedStringWrapperInstanceSize);
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__ ldrb(r4, FieldMemOperand(map, Map::kUnusedPropertyFieldsOffset));
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__ cmp(r4, Operand::Zero());
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__ Assert(eq, kUnexpectedUnusedPropertiesOfStringWrapper);
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}
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__ str(map, FieldMemOperand(r0, HeapObject::kMapOffset));
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__ LoadRoot(r3, Heap::kEmptyFixedArrayRootIndex);
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__ str(r3, FieldMemOperand(r0, JSObject::kPropertiesOffset));
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__ str(r3, FieldMemOperand(r0, JSObject::kElementsOffset));
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__ str(argument, FieldMemOperand(r0, JSValue::kValueOffset));
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// Ensure the object is fully initialized.
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STATIC_ASSERT(JSValue::kSize == 4 * kPointerSize);
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__ Ret();
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// The argument was not found in the number to string cache. Check
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// if it's a string already before calling the conversion builtin.
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Label convert_argument;
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__ bind(¬_cached);
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__ JumpIfSmi(r0, &convert_argument);
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// Is it a String?
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__ ldr(r2, FieldMemOperand(r0, HeapObject::kMapOffset));
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__ ldrb(r3, FieldMemOperand(r2, Map::kInstanceTypeOffset));
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STATIC_ASSERT(kNotStringTag != 0);
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__ tst(r3, Operand(kIsNotStringMask));
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__ b(ne, &convert_argument);
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__ mov(argument, r0);
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__ IncrementCounter(counters->string_ctor_conversions(), 1, r3, r4);
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__ b(&argument_is_string);
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// Invoke the conversion builtin and put the result into r2.
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__ bind(&convert_argument);
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__ push(function); // Preserve the function.
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__ IncrementCounter(counters->string_ctor_conversions(), 1, r3, r4);
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{
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FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL);
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__ push(r0);
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__ InvokeBuiltin(Builtins::TO_STRING, CALL_FUNCTION);
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}
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__ pop(function);
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__ mov(argument, r0);
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__ b(&argument_is_string);
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// Load the empty string into r2, remove the receiver from the
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// stack, and jump back to the case where the argument is a string.
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__ bind(&no_arguments);
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__ LoadRoot(argument, Heap::kempty_stringRootIndex);
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__ Drop(1);
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__ b(&argument_is_string);
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// At this point the argument is already a string. Call runtime to
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// create a string wrapper.
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__ bind(&gc_required);
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__ IncrementCounter(counters->string_ctor_gc_required(), 1, r3, r4);
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{
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FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL);
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__ push(argument);
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__ CallRuntime(Runtime::kNewStringWrapper, 1);
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}
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__ Ret();
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}
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static void CallRuntimePassFunction(
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MacroAssembler* masm, Runtime::FunctionId function_id) {
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FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL);
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// Push a copy of the function onto the stack.
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__ push(r1);
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// Push function as parameter to the runtime call.
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__ Push(r1);
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__ CallRuntime(function_id, 1);
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// Restore receiver.
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__ pop(r1);
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}
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static void GenerateTailCallToSharedCode(MacroAssembler* masm) {
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__ ldr(r2, FieldMemOperand(r1, JSFunction::kSharedFunctionInfoOffset));
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__ ldr(r2, FieldMemOperand(r2, SharedFunctionInfo::kCodeOffset));
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__ add(r2, r2, Operand(Code::kHeaderSize - kHeapObjectTag));
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__ Jump(r2);
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}
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static void GenerateTailCallToReturnedCode(MacroAssembler* masm) {
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__ add(r0, r0, Operand(Code::kHeaderSize - kHeapObjectTag));
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__ Jump(r0);
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}
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void Builtins::Generate_InOptimizationQueue(MacroAssembler* masm) {
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// Checking whether the queued function is ready for install is optional,
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// since we come across interrupts and stack checks elsewhere. However,
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// not checking may delay installing ready functions, and always checking
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// would be quite expensive. A good compromise is to first check against
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// stack limit as a cue for an interrupt signal.
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Label ok;
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__ LoadRoot(ip, Heap::kStackLimitRootIndex);
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__ cmp(sp, Operand(ip));
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__ b(hs, &ok);
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CallRuntimePassFunction(masm, Runtime::kTryInstallOptimizedCode);
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GenerateTailCallToReturnedCode(masm);
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__ bind(&ok);
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GenerateTailCallToSharedCode(masm);
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}
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static void Generate_JSConstructStubHelper(MacroAssembler* masm,
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bool is_api_function,
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bool create_memento) {
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// ----------- S t a t e -------------
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// -- r0 : number of arguments
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// -- r1 : constructor function
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// -- r2 : allocation site or undefined
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// -- lr : return address
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// -- sp[...]: constructor arguments
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// -----------------------------------
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// Should never create mementos for api functions.
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ASSERT(!is_api_function || !create_memento);
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Isolate* isolate = masm->isolate();
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// Enter a construct frame.
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{
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FrameAndConstantPoolScope scope(masm, StackFrame::CONSTRUCT);
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if (create_memento) {
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__ AssertUndefinedOrAllocationSite(r2, r3);
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__ push(r2);
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}
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// Preserve the two incoming parameters on the stack.
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__ SmiTag(r0);
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__ push(r0); // Smi-tagged arguments count.
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__ push(r1); // Constructor function.
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// Try to allocate the object without transitioning into C code. If any of
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// the preconditions is not met, the code bails out to the runtime call.
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Label rt_call, allocated;
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if (FLAG_inline_new) {
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Label undo_allocation;
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ExternalReference debug_step_in_fp =
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ExternalReference::debug_step_in_fp_address(isolate);
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__ mov(r2, Operand(debug_step_in_fp));
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__ ldr(r2, MemOperand(r2));
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__ tst(r2, r2);
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__ b(ne, &rt_call);
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// Load the initial map and verify that it is in fact a map.
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// r1: constructor function
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__ ldr(r2, FieldMemOperand(r1, JSFunction::kPrototypeOrInitialMapOffset));
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__ JumpIfSmi(r2, &rt_call);
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__ CompareObjectType(r2, r3, r4, MAP_TYPE);
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__ b(ne, &rt_call);
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// Check that the constructor is not constructing a JSFunction (see
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// comments in Runtime_NewObject in runtime.cc). In which case the
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// initial map's instance type would be JS_FUNCTION_TYPE.
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// r1: constructor function
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// r2: initial map
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__ CompareInstanceType(r2, r3, JS_FUNCTION_TYPE);
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__ b(eq, &rt_call);
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if (!is_api_function) {
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Label allocate;
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MemOperand bit_field3 = FieldMemOperand(r2, Map::kBitField3Offset);
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// Check if slack tracking is enabled.
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__ ldr(r4, bit_field3);
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__ DecodeField<Map::ConstructionCount>(r3, r4);
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__ cmp(r3, Operand(JSFunction::kNoSlackTracking));
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__ b(eq, &allocate);
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// Decrease generous allocation count.
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__ sub(r4, r4, Operand(1 << Map::ConstructionCount::kShift));
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__ str(r4, bit_field3);
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__ cmp(r3, Operand(JSFunction::kFinishSlackTracking));
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__ b(ne, &allocate);
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__ push(r1);
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__ Push(r2, r1); // r1 = constructor
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__ CallRuntime(Runtime::kFinalizeInstanceSize, 1);
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__ pop(r2);
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__ pop(r1);
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__ bind(&allocate);
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}
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// Now allocate the JSObject on the heap.
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// r1: constructor function
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// r2: initial map
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__ ldrb(r3, FieldMemOperand(r2, Map::kInstanceSizeOffset));
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if (create_memento) {
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__ add(r3, r3, Operand(AllocationMemento::kSize / kPointerSize));
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}
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__ Allocate(r3, r4, r5, r6, &rt_call, SIZE_IN_WORDS);
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// Allocated the JSObject, now initialize the fields. Map is set to
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// initial map and properties and elements are set to empty fixed array.
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// r1: constructor function
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// r2: initial map
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// r3: object size (not including memento if create_memento)
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// r4: JSObject (not tagged)
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__ LoadRoot(r6, Heap::kEmptyFixedArrayRootIndex);
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__ mov(r5, r4);
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ASSERT_EQ(0 * kPointerSize, JSObject::kMapOffset);
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__ str(r2, MemOperand(r5, kPointerSize, PostIndex));
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ASSERT_EQ(1 * kPointerSize, JSObject::kPropertiesOffset);
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__ str(r6, MemOperand(r5, kPointerSize, PostIndex));
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ASSERT_EQ(2 * kPointerSize, JSObject::kElementsOffset);
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__ str(r6, MemOperand(r5, kPointerSize, PostIndex));
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// Fill all the in-object properties with the appropriate filler.
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// r1: constructor function
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// r2: initial map
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// r3: object size (in words, including memento if create_memento)
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// r4: JSObject (not tagged)
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// r5: First in-object property of JSObject (not tagged)
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ASSERT_EQ(3 * kPointerSize, JSObject::kHeaderSize);
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__ LoadRoot(r6, Heap::kUndefinedValueRootIndex);
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if (!is_api_function) {
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Label no_inobject_slack_tracking;
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// Check if slack tracking is enabled.
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__ ldr(ip, FieldMemOperand(r2, Map::kBitField3Offset));
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__ DecodeField<Map::ConstructionCount>(ip);
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__ cmp(ip, Operand(JSFunction::kNoSlackTracking));
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__ b(eq, &no_inobject_slack_tracking);
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// Allocate object with a slack.
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__ ldr(r0, FieldMemOperand(r2, Map::kInstanceSizesOffset));
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__ Ubfx(r0, r0, Map::kPreAllocatedPropertyFieldsByte * kBitsPerByte,
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kBitsPerByte);
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__ add(r0, r5, Operand(r0, LSL, kPointerSizeLog2));
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// r0: offset of first field after pre-allocated fields
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if (FLAG_debug_code) {
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__ add(ip, r4, Operand(r3, LSL, kPointerSizeLog2)); // End of object.
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__ cmp(r0, ip);
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__ Assert(le, kUnexpectedNumberOfPreAllocatedPropertyFields);
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}
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__ InitializeFieldsWithFiller(r5, r0, r6);
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// To allow for truncation.
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__ LoadRoot(r6, Heap::kOnePointerFillerMapRootIndex);
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// Fill the remaining fields with one pointer filler map.
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__ bind(&no_inobject_slack_tracking);
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}
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if (create_memento) {
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__ sub(ip, r3, Operand(AllocationMemento::kSize / kPointerSize));
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__ add(r0, r4, Operand(ip, LSL, kPointerSizeLog2)); // End of object.
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__ InitializeFieldsWithFiller(r5, r0, r6);
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// Fill in memento fields.
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// r5: points to the allocated but uninitialized memento.
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__ LoadRoot(r6, Heap::kAllocationMementoMapRootIndex);
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ASSERT_EQ(0 * kPointerSize, AllocationMemento::kMapOffset);
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__ str(r6, MemOperand(r5, kPointerSize, PostIndex));
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// Load the AllocationSite
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__ ldr(r6, MemOperand(sp, 2 * kPointerSize));
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ASSERT_EQ(1 * kPointerSize, AllocationMemento::kAllocationSiteOffset);
|
|
__ str(r6, MemOperand(r5, kPointerSize, PostIndex));
|
|
} else {
|
|
__ add(r0, r4, Operand(r3, LSL, kPointerSizeLog2)); // End of object.
|
|
__ InitializeFieldsWithFiller(r5, r0, r6);
|
|
}
|
|
|
|
// Add the object tag to make the JSObject real, so that we can continue
|
|
// and jump into the continuation code at any time from now on. Any
|
|
// failures need to undo the allocation, so that the heap is in a
|
|
// consistent state and verifiable.
|
|
__ add(r4, r4, Operand(kHeapObjectTag));
|
|
|
|
// Check if a non-empty properties array is needed. Continue with
|
|
// allocated object if not fall through to runtime call if it is.
|
|
// r1: constructor function
|
|
// r4: JSObject
|
|
// r5: start of next object (not tagged)
|
|
__ ldrb(r3, FieldMemOperand(r2, Map::kUnusedPropertyFieldsOffset));
|
|
// The field instance sizes contains both pre-allocated property fields
|
|
// and in-object properties.
|
|
__ ldr(r0, FieldMemOperand(r2, Map::kInstanceSizesOffset));
|
|
__ Ubfx(r6, r0, Map::kPreAllocatedPropertyFieldsByte * kBitsPerByte,
|
|
kBitsPerByte);
|
|
__ add(r3, r3, Operand(r6));
|
|
__ Ubfx(r6, r0, Map::kInObjectPropertiesByte * kBitsPerByte,
|
|
kBitsPerByte);
|
|
__ sub(r3, r3, Operand(r6), SetCC);
|
|
|
|
// Done if no extra properties are to be allocated.
|
|
__ b(eq, &allocated);
|
|
__ Assert(pl, kPropertyAllocationCountFailed);
|
|
|
|
// Scale the number of elements by pointer size and add the header for
|
|
// FixedArrays to the start of the next object calculation from above.
|
|
// r1: constructor
|
|
// r3: number of elements in properties array
|
|
// r4: JSObject
|
|
// r5: start of next object
|
|
__ add(r0, r3, Operand(FixedArray::kHeaderSize / kPointerSize));
|
|
__ Allocate(
|
|
r0,
|
|
r5,
|
|
r6,
|
|
r2,
|
|
&undo_allocation,
|
|
static_cast<AllocationFlags>(RESULT_CONTAINS_TOP | SIZE_IN_WORDS));
|
|
|
|
// Initialize the FixedArray.
|
|
// r1: constructor
|
|
// r3: number of elements in properties array
|
|
// r4: JSObject
|
|
// r5: FixedArray (not tagged)
|
|
__ LoadRoot(r6, Heap::kFixedArrayMapRootIndex);
|
|
__ mov(r2, r5);
|
|
ASSERT_EQ(0 * kPointerSize, JSObject::kMapOffset);
|
|
__ str(r6, MemOperand(r2, kPointerSize, PostIndex));
|
|
ASSERT_EQ(1 * kPointerSize, FixedArray::kLengthOffset);
|
|
__ SmiTag(r0, r3);
|
|
__ str(r0, MemOperand(r2, kPointerSize, PostIndex));
|
|
|
|
// Initialize the fields to undefined.
|
|
// r1: constructor function
|
|
// r2: First element of FixedArray (not tagged)
|
|
// r3: number of elements in properties array
|
|
// r4: JSObject
|
|
// r5: FixedArray (not tagged)
|
|
__ add(r6, r2, Operand(r3, LSL, kPointerSizeLog2)); // End of object.
|
|
ASSERT_EQ(2 * kPointerSize, FixedArray::kHeaderSize);
|
|
{ Label loop, entry;
|
|
__ LoadRoot(r0, Heap::kUndefinedValueRootIndex);
|
|
__ b(&entry);
|
|
__ bind(&loop);
|
|
__ str(r0, MemOperand(r2, kPointerSize, PostIndex));
|
|
__ bind(&entry);
|
|
__ cmp(r2, r6);
|
|
__ b(lt, &loop);
|
|
}
|
|
|
|
// Store the initialized FixedArray into the properties field of
|
|
// the JSObject
|
|
// r1: constructor function
|
|
// r4: JSObject
|
|
// r5: FixedArray (not tagged)
|
|
__ add(r5, r5, Operand(kHeapObjectTag)); // Add the heap tag.
|
|
__ str(r5, FieldMemOperand(r4, JSObject::kPropertiesOffset));
|
|
|
|
// Continue with JSObject being successfully allocated
|
|
// r1: constructor function
|
|
// r4: JSObject
|
|
__ jmp(&allocated);
|
|
|
|
// Undo the setting of the new top so that the heap is verifiable. For
|
|
// example, the map's unused properties potentially do not match the
|
|
// allocated objects unused properties.
|
|
// r4: JSObject (previous new top)
|
|
__ bind(&undo_allocation);
|
|
__ UndoAllocationInNewSpace(r4, r5);
|
|
}
|
|
|
|
// Allocate the new receiver object using the runtime call.
|
|
// r1: constructor function
|
|
__ bind(&rt_call);
|
|
if (create_memento) {
|
|
// Get the cell or allocation site.
|
|
__ ldr(r2, MemOperand(sp, 2 * kPointerSize));
|
|
__ push(r2);
|
|
}
|
|
|
|
__ push(r1); // argument for Runtime_NewObject
|
|
if (create_memento) {
|
|
__ CallRuntime(Runtime::kNewObjectWithAllocationSite, 2);
|
|
} else {
|
|
__ CallRuntime(Runtime::kNewObject, 1);
|
|
}
|
|
__ mov(r4, r0);
|
|
|
|
// If we ended up using the runtime, and we want a memento, then the
|
|
// runtime call made it for us, and we shouldn't do create count
|
|
// increment.
|
|
Label count_incremented;
|
|
if (create_memento) {
|
|
__ jmp(&count_incremented);
|
|
}
|
|
|
|
// Receiver for constructor call allocated.
|
|
// r4: JSObject
|
|
__ bind(&allocated);
|
|
|
|
if (create_memento) {
|
|
__ ldr(r2, MemOperand(sp, kPointerSize * 2));
|
|
__ LoadRoot(r5, Heap::kUndefinedValueRootIndex);
|
|
__ cmp(r2, r5);
|
|
__ b(eq, &count_incremented);
|
|
// r2 is an AllocationSite. We are creating a memento from it, so we
|
|
// need to increment the memento create count.
|
|
__ ldr(r3, FieldMemOperand(r2,
|
|
AllocationSite::kPretenureCreateCountOffset));
|
|
__ add(r3, r3, Operand(Smi::FromInt(1)));
|
|
__ str(r3, FieldMemOperand(r2,
|
|
AllocationSite::kPretenureCreateCountOffset));
|
|
__ bind(&count_incremented);
|
|
}
|
|
|
|
__ push(r4);
|
|
__ push(r4);
|
|
|
|
// Reload the number of arguments and the constructor from the stack.
|
|
// sp[0]: receiver
|
|
// sp[1]: receiver
|
|
// sp[2]: constructor function
|
|
// sp[3]: number of arguments (smi-tagged)
|
|
__ ldr(r1, MemOperand(sp, 2 * kPointerSize));
|
|
__ ldr(r3, MemOperand(sp, 3 * kPointerSize));
|
|
|
|
// Set up pointer to last argument.
|
|
__ add(r2, fp, Operand(StandardFrameConstants::kCallerSPOffset));
|
|
|
|
// Set up number of arguments for function call below
|
|
__ SmiUntag(r0, r3);
|
|
|
|
// Copy arguments and receiver to the expression stack.
|
|
// r0: number of arguments
|
|
// r1: constructor function
|
|
// r2: address of last argument (caller sp)
|
|
// r3: number of arguments (smi-tagged)
|
|
// sp[0]: receiver
|
|
// sp[1]: receiver
|
|
// sp[2]: constructor function
|
|
// sp[3]: number of arguments (smi-tagged)
|
|
Label loop, entry;
|
|
__ b(&entry);
|
|
__ bind(&loop);
|
|
__ ldr(ip, MemOperand(r2, r3, LSL, kPointerSizeLog2 - 1));
|
|
__ push(ip);
|
|
__ bind(&entry);
|
|
__ sub(r3, r3, Operand(2), SetCC);
|
|
__ b(ge, &loop);
|
|
|
|
// Call the function.
|
|
// r0: number of arguments
|
|
// r1: constructor function
|
|
if (is_api_function) {
|
|
__ ldr(cp, FieldMemOperand(r1, JSFunction::kContextOffset));
|
|
Handle<Code> code =
|
|
masm->isolate()->builtins()->HandleApiCallConstruct();
|
|
__ Call(code, RelocInfo::CODE_TARGET);
|
|
} else {
|
|
ParameterCount actual(r0);
|
|
__ InvokeFunction(r1, actual, CALL_FUNCTION, NullCallWrapper());
|
|
}
|
|
|
|
// Store offset of return address for deoptimizer.
|
|
if (!is_api_function) {
|
|
masm->isolate()->heap()->SetConstructStubDeoptPCOffset(masm->pc_offset());
|
|
}
|
|
|
|
// Restore context from the frame.
|
|
// r0: result
|
|
// sp[0]: receiver
|
|
// sp[1]: constructor function
|
|
// sp[2]: number of arguments (smi-tagged)
|
|
__ ldr(cp, MemOperand(fp, StandardFrameConstants::kContextOffset));
|
|
|
|
// If the result is an object (in the ECMA sense), we should get rid
|
|
// of the receiver and use the result; see ECMA-262 section 13.2.2-7
|
|
// on page 74.
|
|
Label use_receiver, exit;
|
|
|
|
// If the result is a smi, it is *not* an object in the ECMA sense.
|
|
// r0: result
|
|
// sp[0]: receiver (newly allocated object)
|
|
// sp[1]: constructor function
|
|
// sp[2]: number of arguments (smi-tagged)
|
|
__ JumpIfSmi(r0, &use_receiver);
|
|
|
|
// If the type of the result (stored in its map) is less than
|
|
// FIRST_SPEC_OBJECT_TYPE, it is not an object in the ECMA sense.
|
|
__ CompareObjectType(r0, r1, r3, FIRST_SPEC_OBJECT_TYPE);
|
|
__ b(ge, &exit);
|
|
|
|
// Throw away the result of the constructor invocation and use the
|
|
// on-stack receiver as the result.
|
|
__ bind(&use_receiver);
|
|
__ ldr(r0, MemOperand(sp));
|
|
|
|
// Remove receiver from the stack, remove caller arguments, and
|
|
// return.
|
|
__ bind(&exit);
|
|
// r0: result
|
|
// sp[0]: receiver (newly allocated object)
|
|
// sp[1]: constructor function
|
|
// sp[2]: number of arguments (smi-tagged)
|
|
__ ldr(r1, MemOperand(sp, 2 * kPointerSize));
|
|
|
|
// Leave construct frame.
|
|
}
|
|
|
|
__ add(sp, sp, Operand(r1, LSL, kPointerSizeLog2 - 1));
|
|
__ add(sp, sp, Operand(kPointerSize));
|
|
__ IncrementCounter(isolate->counters()->constructed_objects(), 1, r1, r2);
|
|
__ Jump(lr);
|
|
}
|
|
|
|
|
|
void Builtins::Generate_JSConstructStubGeneric(MacroAssembler* masm) {
|
|
Generate_JSConstructStubHelper(masm, false, FLAG_pretenuring_call_new);
|
|
}
|
|
|
|
|
|
void Builtins::Generate_JSConstructStubApi(MacroAssembler* masm) {
|
|
Generate_JSConstructStubHelper(masm, true, false);
|
|
}
|
|
|
|
|
|
static void Generate_JSEntryTrampolineHelper(MacroAssembler* masm,
|
|
bool is_construct) {
|
|
// Called from Generate_JS_Entry
|
|
// r0: code entry
|
|
// r1: function
|
|
// r2: receiver
|
|
// r3: argc
|
|
// r4: argv
|
|
// r5-r6, r8 (if not FLAG_enable_ool_constant_pool) and cp may be clobbered
|
|
ProfileEntryHookStub::MaybeCallEntryHook(masm);
|
|
|
|
// Clear the context before we push it when entering the internal frame.
|
|
__ mov(cp, Operand::Zero());
|
|
|
|
// Enter an internal frame.
|
|
{
|
|
FrameScope scope(masm, StackFrame::INTERNAL);
|
|
|
|
// Set up the context from the function argument.
|
|
__ ldr(cp, FieldMemOperand(r1, JSFunction::kContextOffset));
|
|
|
|
__ InitializeRootRegister();
|
|
|
|
// Push the function and the receiver onto the stack.
|
|
__ push(r1);
|
|
__ push(r2);
|
|
|
|
// Copy arguments to the stack in a loop.
|
|
// r1: function
|
|
// r3: argc
|
|
// r4: argv, i.e. points to first arg
|
|
Label loop, entry;
|
|
__ add(r2, r4, Operand(r3, LSL, kPointerSizeLog2));
|
|
// r2 points past last arg.
|
|
__ b(&entry);
|
|
__ bind(&loop);
|
|
__ ldr(r0, MemOperand(r4, kPointerSize, PostIndex)); // read next parameter
|
|
__ ldr(r0, MemOperand(r0)); // dereference handle
|
|
__ push(r0); // push parameter
|
|
__ bind(&entry);
|
|
__ cmp(r4, r2);
|
|
__ b(ne, &loop);
|
|
|
|
// Initialize all JavaScript callee-saved registers, since they will be seen
|
|
// by the garbage collector as part of handlers.
|
|
__ LoadRoot(r4, Heap::kUndefinedValueRootIndex);
|
|
__ mov(r5, Operand(r4));
|
|
__ mov(r6, Operand(r4));
|
|
if (!FLAG_enable_ool_constant_pool) {
|
|
__ mov(r8, Operand(r4));
|
|
}
|
|
if (kR9Available == 1) {
|
|
__ mov(r9, Operand(r4));
|
|
}
|
|
|
|
// Invoke the code and pass argc as r0.
|
|
__ mov(r0, Operand(r3));
|
|
if (is_construct) {
|
|
// No type feedback cell is available
|
|
__ LoadRoot(r2, Heap::kUndefinedValueRootIndex);
|
|
CallConstructStub stub(masm->isolate(), NO_CALL_CONSTRUCTOR_FLAGS);
|
|
__ CallStub(&stub);
|
|
} else {
|
|
ParameterCount actual(r0);
|
|
__ InvokeFunction(r1, actual, CALL_FUNCTION, NullCallWrapper());
|
|
}
|
|
// Exit the JS frame and remove the parameters (except function), and
|
|
// return.
|
|
// Respect ABI stack constraint.
|
|
}
|
|
__ Jump(lr);
|
|
|
|
// r0: result
|
|
}
|
|
|
|
|
|
void Builtins::Generate_JSEntryTrampoline(MacroAssembler* masm) {
|
|
Generate_JSEntryTrampolineHelper(masm, false);
|
|
}
|
|
|
|
|
|
void Builtins::Generate_JSConstructEntryTrampoline(MacroAssembler* masm) {
|
|
Generate_JSEntryTrampolineHelper(masm, true);
|
|
}
|
|
|
|
|
|
void Builtins::Generate_CompileUnoptimized(MacroAssembler* masm) {
|
|
CallRuntimePassFunction(masm, Runtime::kCompileUnoptimized);
|
|
GenerateTailCallToReturnedCode(masm);
|
|
}
|
|
|
|
|
|
static void CallCompileOptimized(MacroAssembler* masm, bool concurrent) {
|
|
FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL);
|
|
// Push a copy of the function onto the stack.
|
|
__ push(r1);
|
|
// Push function as parameter to the runtime call.
|
|
__ Push(r1);
|
|
// Whether to compile in a background thread.
|
|
__ Push(masm->isolate()->factory()->ToBoolean(concurrent));
|
|
|
|
__ CallRuntime(Runtime::kCompileOptimized, 2);
|
|
// Restore receiver.
|
|
__ pop(r1);
|
|
}
|
|
|
|
|
|
void Builtins::Generate_CompileOptimized(MacroAssembler* masm) {
|
|
CallCompileOptimized(masm, false);
|
|
GenerateTailCallToReturnedCode(masm);
|
|
}
|
|
|
|
|
|
void Builtins::Generate_CompileOptimizedConcurrent(MacroAssembler* masm) {
|
|
CallCompileOptimized(masm, true);
|
|
GenerateTailCallToReturnedCode(masm);
|
|
}
|
|
|
|
|
|
static void GenerateMakeCodeYoungAgainCommon(MacroAssembler* masm) {
|
|
// For now, we are relying on the fact that make_code_young doesn't do any
|
|
// garbage collection which allows us to save/restore the registers without
|
|
// worrying about which of them contain pointers. We also don't build an
|
|
// internal frame to make the code faster, since we shouldn't have to do stack
|
|
// crawls in MakeCodeYoung. This seems a bit fragile.
|
|
|
|
// The following registers must be saved and restored when calling through to
|
|
// the runtime:
|
|
// r0 - contains return address (beginning of patch sequence)
|
|
// r1 - isolate
|
|
FrameScope scope(masm, StackFrame::MANUAL);
|
|
__ stm(db_w, sp, r0.bit() | r1.bit() | fp.bit() | lr.bit());
|
|
__ PrepareCallCFunction(2, 0, r2);
|
|
__ mov(r1, Operand(ExternalReference::isolate_address(masm->isolate())));
|
|
__ CallCFunction(
|
|
ExternalReference::get_make_code_young_function(masm->isolate()), 2);
|
|
__ ldm(ia_w, sp, r0.bit() | r1.bit() | fp.bit() | lr.bit());
|
|
__ mov(pc, r0);
|
|
}
|
|
|
|
#define DEFINE_CODE_AGE_BUILTIN_GENERATOR(C) \
|
|
void Builtins::Generate_Make##C##CodeYoungAgainEvenMarking( \
|
|
MacroAssembler* masm) { \
|
|
GenerateMakeCodeYoungAgainCommon(masm); \
|
|
} \
|
|
void Builtins::Generate_Make##C##CodeYoungAgainOddMarking( \
|
|
MacroAssembler* masm) { \
|
|
GenerateMakeCodeYoungAgainCommon(masm); \
|
|
}
|
|
CODE_AGE_LIST(DEFINE_CODE_AGE_BUILTIN_GENERATOR)
|
|
#undef DEFINE_CODE_AGE_BUILTIN_GENERATOR
|
|
|
|
|
|
void Builtins::Generate_MarkCodeAsExecutedOnce(MacroAssembler* masm) {
|
|
// For now, as in GenerateMakeCodeYoungAgainCommon, we are relying on the fact
|
|
// that make_code_young doesn't do any garbage collection which allows us to
|
|
// save/restore the registers without worrying about which of them contain
|
|
// pointers.
|
|
|
|
// The following registers must be saved and restored when calling through to
|
|
// the runtime:
|
|
// r0 - contains return address (beginning of patch sequence)
|
|
// r1 - isolate
|
|
FrameScope scope(masm, StackFrame::MANUAL);
|
|
__ stm(db_w, sp, r0.bit() | r1.bit() | fp.bit() | lr.bit());
|
|
__ PrepareCallCFunction(2, 0, r2);
|
|
__ mov(r1, Operand(ExternalReference::isolate_address(masm->isolate())));
|
|
__ CallCFunction(ExternalReference::get_mark_code_as_executed_function(
|
|
masm->isolate()), 2);
|
|
__ ldm(ia_w, sp, r0.bit() | r1.bit() | fp.bit() | lr.bit());
|
|
|
|
// Perform prologue operations usually performed by the young code stub.
|
|
__ PushFixedFrame(r1);
|
|
__ add(fp, sp, Operand(StandardFrameConstants::kFixedFrameSizeFromFp));
|
|
|
|
// Jump to point after the code-age stub.
|
|
__ add(r0, r0, Operand(kNoCodeAgeSequenceLength));
|
|
__ mov(pc, r0);
|
|
}
|
|
|
|
|
|
void Builtins::Generate_MarkCodeAsExecutedTwice(MacroAssembler* masm) {
|
|
GenerateMakeCodeYoungAgainCommon(masm);
|
|
}
|
|
|
|
|
|
static void Generate_NotifyStubFailureHelper(MacroAssembler* masm,
|
|
SaveFPRegsMode save_doubles) {
|
|
{
|
|
FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL);
|
|
|
|
// Preserve registers across notification, this is important for compiled
|
|
// stubs that tail call the runtime on deopts passing their parameters in
|
|
// registers.
|
|
__ stm(db_w, sp, kJSCallerSaved | kCalleeSaved);
|
|
// Pass the function and deoptimization type to the runtime system.
|
|
__ CallRuntime(Runtime::kNotifyStubFailure, 0, save_doubles);
|
|
__ ldm(ia_w, sp, kJSCallerSaved | kCalleeSaved);
|
|
}
|
|
|
|
__ add(sp, sp, Operand(kPointerSize)); // Ignore state
|
|
__ mov(pc, lr); // Jump to miss handler
|
|
}
|
|
|
|
|
|
void Builtins::Generate_NotifyStubFailure(MacroAssembler* masm) {
|
|
Generate_NotifyStubFailureHelper(masm, kDontSaveFPRegs);
|
|
}
|
|
|
|
|
|
void Builtins::Generate_NotifyStubFailureSaveDoubles(MacroAssembler* masm) {
|
|
Generate_NotifyStubFailureHelper(masm, kSaveFPRegs);
|
|
}
|
|
|
|
|
|
static void Generate_NotifyDeoptimizedHelper(MacroAssembler* masm,
|
|
Deoptimizer::BailoutType type) {
|
|
{
|
|
FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL);
|
|
// Pass the function and deoptimization type to the runtime system.
|
|
__ mov(r0, Operand(Smi::FromInt(static_cast<int>(type))));
|
|
__ push(r0);
|
|
__ CallRuntime(Runtime::kNotifyDeoptimized, 1);
|
|
}
|
|
|
|
// Get the full codegen state from the stack and untag it -> r6.
|
|
__ ldr(r6, MemOperand(sp, 0 * kPointerSize));
|
|
__ SmiUntag(r6);
|
|
// Switch on the state.
|
|
Label with_tos_register, unknown_state;
|
|
__ cmp(r6, Operand(FullCodeGenerator::NO_REGISTERS));
|
|
__ b(ne, &with_tos_register);
|
|
__ add(sp, sp, Operand(1 * kPointerSize)); // Remove state.
|
|
__ Ret();
|
|
|
|
__ bind(&with_tos_register);
|
|
__ ldr(r0, MemOperand(sp, 1 * kPointerSize));
|
|
__ cmp(r6, Operand(FullCodeGenerator::TOS_REG));
|
|
__ b(ne, &unknown_state);
|
|
__ add(sp, sp, Operand(2 * kPointerSize)); // Remove state.
|
|
__ Ret();
|
|
|
|
__ bind(&unknown_state);
|
|
__ stop("no cases left");
|
|
}
|
|
|
|
|
|
void Builtins::Generate_NotifyDeoptimized(MacroAssembler* masm) {
|
|
Generate_NotifyDeoptimizedHelper(masm, Deoptimizer::EAGER);
|
|
}
|
|
|
|
|
|
void Builtins::Generate_NotifySoftDeoptimized(MacroAssembler* masm) {
|
|
Generate_NotifyDeoptimizedHelper(masm, Deoptimizer::SOFT);
|
|
}
|
|
|
|
|
|
void Builtins::Generate_NotifyLazyDeoptimized(MacroAssembler* masm) {
|
|
Generate_NotifyDeoptimizedHelper(masm, Deoptimizer::LAZY);
|
|
}
|
|
|
|
|
|
void Builtins::Generate_OnStackReplacement(MacroAssembler* masm) {
|
|
// Lookup the function in the JavaScript frame.
|
|
__ ldr(r0, MemOperand(fp, JavaScriptFrameConstants::kFunctionOffset));
|
|
{
|
|
FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL);
|
|
// Pass function as argument.
|
|
__ push(r0);
|
|
__ CallRuntime(Runtime::kCompileForOnStackReplacement, 1);
|
|
}
|
|
|
|
// If the code object is null, just return to the unoptimized code.
|
|
Label skip;
|
|
__ cmp(r0, Operand(Smi::FromInt(0)));
|
|
__ b(ne, &skip);
|
|
__ Ret();
|
|
|
|
__ bind(&skip);
|
|
|
|
// Load deoptimization data from the code object.
|
|
// <deopt_data> = <code>[#deoptimization_data_offset]
|
|
__ ldr(r1, FieldMemOperand(r0, Code::kDeoptimizationDataOffset));
|
|
|
|
{ ConstantPoolUnavailableScope constant_pool_unavailable(masm);
|
|
if (FLAG_enable_ool_constant_pool) {
|
|
__ ldr(pp, FieldMemOperand(r0, Code::kConstantPoolOffset));
|
|
}
|
|
|
|
// Load the OSR entrypoint offset from the deoptimization data.
|
|
// <osr_offset> = <deopt_data>[#header_size + #osr_pc_offset]
|
|
__ ldr(r1, FieldMemOperand(r1, FixedArray::OffsetOfElementAt(
|
|
DeoptimizationInputData::kOsrPcOffsetIndex)));
|
|
|
|
// Compute the target address = code_obj + header_size + osr_offset
|
|
// <entry_addr> = <code_obj> + #header_size + <osr_offset>
|
|
__ add(r0, r0, Operand::SmiUntag(r1));
|
|
__ add(lr, r0, Operand(Code::kHeaderSize - kHeapObjectTag));
|
|
|
|
// And "return" to the OSR entry point of the function.
|
|
__ Ret();
|
|
}
|
|
}
|
|
|
|
|
|
void Builtins::Generate_OsrAfterStackCheck(MacroAssembler* masm) {
|
|
// We check the stack limit as indicator that recompilation might be done.
|
|
Label ok;
|
|
__ LoadRoot(ip, Heap::kStackLimitRootIndex);
|
|
__ cmp(sp, Operand(ip));
|
|
__ b(hs, &ok);
|
|
{
|
|
FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL);
|
|
__ CallRuntime(Runtime::kStackGuard, 0);
|
|
}
|
|
__ Jump(masm->isolate()->builtins()->OnStackReplacement(),
|
|
RelocInfo::CODE_TARGET);
|
|
|
|
__ bind(&ok);
|
|
__ Ret();
|
|
}
|
|
|
|
|
|
void Builtins::Generate_FunctionCall(MacroAssembler* masm) {
|
|
// 1. Make sure we have at least one argument.
|
|
// r0: actual number of arguments
|
|
{ Label done;
|
|
__ cmp(r0, Operand::Zero());
|
|
__ b(ne, &done);
|
|
__ LoadRoot(r2, Heap::kUndefinedValueRootIndex);
|
|
__ push(r2);
|
|
__ add(r0, r0, Operand(1));
|
|
__ bind(&done);
|
|
}
|
|
|
|
// 2. Get the function to call (passed as receiver) from the stack, check
|
|
// if it is a function.
|
|
// r0: actual number of arguments
|
|
Label slow, non_function;
|
|
__ ldr(r1, MemOperand(sp, r0, LSL, kPointerSizeLog2));
|
|
__ JumpIfSmi(r1, &non_function);
|
|
__ CompareObjectType(r1, r2, r2, JS_FUNCTION_TYPE);
|
|
__ b(ne, &slow);
|
|
|
|
// 3a. Patch the first argument if necessary when calling a function.
|
|
// r0: actual number of arguments
|
|
// r1: function
|
|
Label shift_arguments;
|
|
__ mov(r4, Operand::Zero()); // indicate regular JS_FUNCTION
|
|
{ Label convert_to_object, use_global_proxy, patch_receiver;
|
|
// Change context eagerly in case we need the global receiver.
|
|
__ ldr(cp, FieldMemOperand(r1, JSFunction::kContextOffset));
|
|
|
|
// Do not transform the receiver for strict mode functions.
|
|
__ ldr(r2, FieldMemOperand(r1, JSFunction::kSharedFunctionInfoOffset));
|
|
__ ldr(r3, FieldMemOperand(r2, SharedFunctionInfo::kCompilerHintsOffset));
|
|
__ tst(r3, Operand(1 << (SharedFunctionInfo::kStrictModeFunction +
|
|
kSmiTagSize)));
|
|
__ b(ne, &shift_arguments);
|
|
|
|
// Do not transform the receiver for native (Compilerhints already in r3).
|
|
__ tst(r3, Operand(1 << (SharedFunctionInfo::kNative + kSmiTagSize)));
|
|
__ b(ne, &shift_arguments);
|
|
|
|
// Compute the receiver in sloppy mode.
|
|
__ add(r2, sp, Operand(r0, LSL, kPointerSizeLog2));
|
|
__ ldr(r2, MemOperand(r2, -kPointerSize));
|
|
// r0: actual number of arguments
|
|
// r1: function
|
|
// r2: first argument
|
|
__ JumpIfSmi(r2, &convert_to_object);
|
|
|
|
__ LoadRoot(r3, Heap::kUndefinedValueRootIndex);
|
|
__ cmp(r2, r3);
|
|
__ b(eq, &use_global_proxy);
|
|
__ LoadRoot(r3, Heap::kNullValueRootIndex);
|
|
__ cmp(r2, r3);
|
|
__ b(eq, &use_global_proxy);
|
|
|
|
STATIC_ASSERT(LAST_SPEC_OBJECT_TYPE == LAST_TYPE);
|
|
__ CompareObjectType(r2, r3, r3, FIRST_SPEC_OBJECT_TYPE);
|
|
__ b(ge, &shift_arguments);
|
|
|
|
__ bind(&convert_to_object);
|
|
|
|
{
|
|
// Enter an internal frame in order to preserve argument count.
|
|
FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL);
|
|
__ SmiTag(r0);
|
|
__ push(r0);
|
|
|
|
__ push(r2);
|
|
__ InvokeBuiltin(Builtins::TO_OBJECT, CALL_FUNCTION);
|
|
__ mov(r2, r0);
|
|
|
|
__ pop(r0);
|
|
__ SmiUntag(r0);
|
|
|
|
// Exit the internal frame.
|
|
}
|
|
|
|
// Restore the function to r1, and the flag to r4.
|
|
__ ldr(r1, MemOperand(sp, r0, LSL, kPointerSizeLog2));
|
|
__ mov(r4, Operand::Zero());
|
|
__ jmp(&patch_receiver);
|
|
|
|
__ bind(&use_global_proxy);
|
|
__ ldr(r2, ContextOperand(cp, Context::GLOBAL_OBJECT_INDEX));
|
|
__ ldr(r2, FieldMemOperand(r2, GlobalObject::kGlobalProxyOffset));
|
|
|
|
__ bind(&patch_receiver);
|
|
__ add(r3, sp, Operand(r0, LSL, kPointerSizeLog2));
|
|
__ str(r2, MemOperand(r3, -kPointerSize));
|
|
|
|
__ jmp(&shift_arguments);
|
|
}
|
|
|
|
// 3b. Check for function proxy.
|
|
__ bind(&slow);
|
|
__ mov(r4, Operand(1, RelocInfo::NONE32)); // indicate function proxy
|
|
__ cmp(r2, Operand(JS_FUNCTION_PROXY_TYPE));
|
|
__ b(eq, &shift_arguments);
|
|
__ bind(&non_function);
|
|
__ mov(r4, Operand(2, RelocInfo::NONE32)); // indicate non-function
|
|
|
|
// 3c. Patch the first argument when calling a non-function. The
|
|
// CALL_NON_FUNCTION builtin expects the non-function callee as
|
|
// receiver, so overwrite the first argument which will ultimately
|
|
// become the receiver.
|
|
// r0: actual number of arguments
|
|
// r1: function
|
|
// r4: call type (0: JS function, 1: function proxy, 2: non-function)
|
|
__ add(r2, sp, Operand(r0, LSL, kPointerSizeLog2));
|
|
__ str(r1, MemOperand(r2, -kPointerSize));
|
|
|
|
// 4. Shift arguments and return address one slot down on the stack
|
|
// (overwriting the original receiver). Adjust argument count to make
|
|
// the original first argument the new receiver.
|
|
// r0: actual number of arguments
|
|
// r1: function
|
|
// r4: call type (0: JS function, 1: function proxy, 2: non-function)
|
|
__ bind(&shift_arguments);
|
|
{ Label loop;
|
|
// Calculate the copy start address (destination). Copy end address is sp.
|
|
__ add(r2, sp, Operand(r0, LSL, kPointerSizeLog2));
|
|
|
|
__ bind(&loop);
|
|
__ ldr(ip, MemOperand(r2, -kPointerSize));
|
|
__ str(ip, MemOperand(r2));
|
|
__ sub(r2, r2, Operand(kPointerSize));
|
|
__ cmp(r2, sp);
|
|
__ b(ne, &loop);
|
|
// Adjust the actual number of arguments and remove the top element
|
|
// (which is a copy of the last argument).
|
|
__ sub(r0, r0, Operand(1));
|
|
__ pop();
|
|
}
|
|
|
|
// 5a. Call non-function via tail call to CALL_NON_FUNCTION builtin,
|
|
// or a function proxy via CALL_FUNCTION_PROXY.
|
|
// r0: actual number of arguments
|
|
// r1: function
|
|
// r4: call type (0: JS function, 1: function proxy, 2: non-function)
|
|
{ Label function, non_proxy;
|
|
__ tst(r4, r4);
|
|
__ b(eq, &function);
|
|
// Expected number of arguments is 0 for CALL_NON_FUNCTION.
|
|
__ mov(r2, Operand::Zero());
|
|
__ cmp(r4, Operand(1));
|
|
__ b(ne, &non_proxy);
|
|
|
|
__ push(r1); // re-add proxy object as additional argument
|
|
__ add(r0, r0, Operand(1));
|
|
__ GetBuiltinFunction(r1, Builtins::CALL_FUNCTION_PROXY);
|
|
__ Jump(masm->isolate()->builtins()->ArgumentsAdaptorTrampoline(),
|
|
RelocInfo::CODE_TARGET);
|
|
|
|
__ bind(&non_proxy);
|
|
__ GetBuiltinFunction(r1, Builtins::CALL_NON_FUNCTION);
|
|
__ Jump(masm->isolate()->builtins()->ArgumentsAdaptorTrampoline(),
|
|
RelocInfo::CODE_TARGET);
|
|
__ bind(&function);
|
|
}
|
|
|
|
// 5b. Get the code to call from the function and check that the number of
|
|
// expected arguments matches what we're providing. If so, jump
|
|
// (tail-call) to the code in register edx without checking arguments.
|
|
// r0: actual number of arguments
|
|
// r1: function
|
|
__ ldr(r3, FieldMemOperand(r1, JSFunction::kSharedFunctionInfoOffset));
|
|
__ ldr(r2,
|
|
FieldMemOperand(r3, SharedFunctionInfo::kFormalParameterCountOffset));
|
|
__ SmiUntag(r2);
|
|
__ cmp(r2, r0); // Check formal and actual parameter counts.
|
|
__ Jump(masm->isolate()->builtins()->ArgumentsAdaptorTrampoline(),
|
|
RelocInfo::CODE_TARGET,
|
|
ne);
|
|
|
|
__ ldr(r3, FieldMemOperand(r1, JSFunction::kCodeEntryOffset));
|
|
ParameterCount expected(0);
|
|
__ InvokeCode(r3, expected, expected, JUMP_FUNCTION, NullCallWrapper());
|
|
}
|
|
|
|
|
|
void Builtins::Generate_FunctionApply(MacroAssembler* masm) {
|
|
const int kIndexOffset =
|
|
StandardFrameConstants::kExpressionsOffset - (2 * kPointerSize);
|
|
const int kLimitOffset =
|
|
StandardFrameConstants::kExpressionsOffset - (1 * kPointerSize);
|
|
const int kArgsOffset = 2 * kPointerSize;
|
|
const int kRecvOffset = 3 * kPointerSize;
|
|
const int kFunctionOffset = 4 * kPointerSize;
|
|
|
|
{
|
|
FrameAndConstantPoolScope frame_scope(masm, StackFrame::INTERNAL);
|
|
|
|
__ ldr(r0, MemOperand(fp, kFunctionOffset)); // get the function
|
|
__ push(r0);
|
|
__ ldr(r0, MemOperand(fp, kArgsOffset)); // get the args array
|
|
__ push(r0);
|
|
__ InvokeBuiltin(Builtins::APPLY_PREPARE, CALL_FUNCTION);
|
|
|
|
// Check the stack for overflow. We are not trying to catch
|
|
// interruptions (e.g. debug break and preemption) here, so the "real stack
|
|
// limit" is checked.
|
|
Label okay;
|
|
__ LoadRoot(r2, Heap::kRealStackLimitRootIndex);
|
|
// Make r2 the space we have left. The stack might already be overflowed
|
|
// here which will cause r2 to become negative.
|
|
__ sub(r2, sp, r2);
|
|
// Check if the arguments will overflow the stack.
|
|
__ cmp(r2, Operand::PointerOffsetFromSmiKey(r0));
|
|
__ b(gt, &okay); // Signed comparison.
|
|
|
|
// Out of stack space.
|
|
__ ldr(r1, MemOperand(fp, kFunctionOffset));
|
|
__ Push(r1, r0);
|
|
__ InvokeBuiltin(Builtins::STACK_OVERFLOW, CALL_FUNCTION);
|
|
// End of stack check.
|
|
|
|
// Push current limit and index.
|
|
__ bind(&okay);
|
|
__ push(r0); // limit
|
|
__ mov(r1, Operand::Zero()); // initial index
|
|
__ push(r1);
|
|
|
|
// Get the receiver.
|
|
__ ldr(r0, MemOperand(fp, kRecvOffset));
|
|
|
|
// Check that the function is a JS function (otherwise it must be a proxy).
|
|
Label push_receiver;
|
|
__ ldr(r1, MemOperand(fp, kFunctionOffset));
|
|
__ CompareObjectType(r1, r2, r2, JS_FUNCTION_TYPE);
|
|
__ b(ne, &push_receiver);
|
|
|
|
// Change context eagerly to get the right global object if necessary.
|
|
__ ldr(cp, FieldMemOperand(r1, JSFunction::kContextOffset));
|
|
// Load the shared function info while the function is still in r1.
|
|
__ ldr(r2, FieldMemOperand(r1, JSFunction::kSharedFunctionInfoOffset));
|
|
|
|
// Compute the receiver.
|
|
// Do not transform the receiver for strict mode functions.
|
|
Label call_to_object, use_global_proxy;
|
|
__ ldr(r2, FieldMemOperand(r2, SharedFunctionInfo::kCompilerHintsOffset));
|
|
__ tst(r2, Operand(1 << (SharedFunctionInfo::kStrictModeFunction +
|
|
kSmiTagSize)));
|
|
__ b(ne, &push_receiver);
|
|
|
|
// Do not transform the receiver for strict mode functions.
|
|
__ tst(r2, Operand(1 << (SharedFunctionInfo::kNative + kSmiTagSize)));
|
|
__ b(ne, &push_receiver);
|
|
|
|
// Compute the receiver in sloppy mode.
|
|
__ JumpIfSmi(r0, &call_to_object);
|
|
__ LoadRoot(r1, Heap::kNullValueRootIndex);
|
|
__ cmp(r0, r1);
|
|
__ b(eq, &use_global_proxy);
|
|
__ LoadRoot(r1, Heap::kUndefinedValueRootIndex);
|
|
__ cmp(r0, r1);
|
|
__ b(eq, &use_global_proxy);
|
|
|
|
// Check if the receiver is already a JavaScript object.
|
|
// r0: receiver
|
|
STATIC_ASSERT(LAST_SPEC_OBJECT_TYPE == LAST_TYPE);
|
|
__ CompareObjectType(r0, r1, r1, FIRST_SPEC_OBJECT_TYPE);
|
|
__ b(ge, &push_receiver);
|
|
|
|
// Convert the receiver to a regular object.
|
|
// r0: receiver
|
|
__ bind(&call_to_object);
|
|
__ push(r0);
|
|
__ InvokeBuiltin(Builtins::TO_OBJECT, CALL_FUNCTION);
|
|
__ b(&push_receiver);
|
|
|
|
__ bind(&use_global_proxy);
|
|
__ ldr(r0, ContextOperand(cp, Context::GLOBAL_OBJECT_INDEX));
|
|
__ ldr(r0, FieldMemOperand(r0, GlobalObject::kGlobalProxyOffset));
|
|
|
|
// Push the receiver.
|
|
// r0: receiver
|
|
__ bind(&push_receiver);
|
|
__ push(r0);
|
|
|
|
// Copy all arguments from the array to the stack.
|
|
Label entry, loop;
|
|
__ ldr(r0, MemOperand(fp, kIndexOffset));
|
|
__ b(&entry);
|
|
|
|
// Load the current argument from the arguments array and push it to the
|
|
// stack.
|
|
// r0: current argument index
|
|
__ bind(&loop);
|
|
__ ldr(r1, MemOperand(fp, kArgsOffset));
|
|
__ Push(r1, r0);
|
|
|
|
// Call the runtime to access the property in the arguments array.
|
|
__ CallRuntime(Runtime::kGetProperty, 2);
|
|
__ push(r0);
|
|
|
|
// Use inline caching to access the arguments.
|
|
__ ldr(r0, MemOperand(fp, kIndexOffset));
|
|
__ add(r0, r0, Operand(1 << kSmiTagSize));
|
|
__ str(r0, MemOperand(fp, kIndexOffset));
|
|
|
|
// Test if the copy loop has finished copying all the elements from the
|
|
// arguments object.
|
|
__ bind(&entry);
|
|
__ ldr(r1, MemOperand(fp, kLimitOffset));
|
|
__ cmp(r0, r1);
|
|
__ b(ne, &loop);
|
|
|
|
// Call the function.
|
|
Label call_proxy;
|
|
ParameterCount actual(r0);
|
|
__ SmiUntag(r0);
|
|
__ ldr(r1, MemOperand(fp, kFunctionOffset));
|
|
__ CompareObjectType(r1, r2, r2, JS_FUNCTION_TYPE);
|
|
__ b(ne, &call_proxy);
|
|
__ InvokeFunction(r1, actual, CALL_FUNCTION, NullCallWrapper());
|
|
|
|
frame_scope.GenerateLeaveFrame();
|
|
__ add(sp, sp, Operand(3 * kPointerSize));
|
|
__ Jump(lr);
|
|
|
|
// Call the function proxy.
|
|
__ bind(&call_proxy);
|
|
__ push(r1); // add function proxy as last argument
|
|
__ add(r0, r0, Operand(1));
|
|
__ mov(r2, Operand::Zero());
|
|
__ GetBuiltinFunction(r1, Builtins::CALL_FUNCTION_PROXY);
|
|
__ Call(masm->isolate()->builtins()->ArgumentsAdaptorTrampoline(),
|
|
RelocInfo::CODE_TARGET);
|
|
|
|
// Tear down the internal frame and remove function, receiver and args.
|
|
}
|
|
__ add(sp, sp, Operand(3 * kPointerSize));
|
|
__ Jump(lr);
|
|
}
|
|
|
|
|
|
static void ArgumentAdaptorStackCheck(MacroAssembler* masm,
|
|
Label* stack_overflow) {
|
|
// ----------- S t a t e -------------
|
|
// -- r0 : actual number of arguments
|
|
// -- r1 : function (passed through to callee)
|
|
// -- r2 : expected number of arguments
|
|
// -----------------------------------
|
|
// Check the stack for overflow. We are not trying to catch
|
|
// interruptions (e.g. debug break and preemption) here, so the "real stack
|
|
// limit" is checked.
|
|
__ LoadRoot(r5, Heap::kRealStackLimitRootIndex);
|
|
// Make r5 the space we have left. The stack might already be overflowed
|
|
// here which will cause r5 to become negative.
|
|
__ sub(r5, sp, r5);
|
|
// Check if the arguments will overflow the stack.
|
|
__ cmp(r5, Operand(r2, LSL, kPointerSizeLog2));
|
|
__ b(le, stack_overflow); // Signed comparison.
|
|
}
|
|
|
|
|
|
static void EnterArgumentsAdaptorFrame(MacroAssembler* masm) {
|
|
__ SmiTag(r0);
|
|
__ mov(r4, Operand(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR)));
|
|
__ stm(db_w, sp, r0.bit() | r1.bit() | r4.bit() |
|
|
(FLAG_enable_ool_constant_pool ? pp.bit() : 0) |
|
|
fp.bit() | lr.bit());
|
|
__ add(fp, sp,
|
|
Operand(StandardFrameConstants::kFixedFrameSizeFromFp + kPointerSize));
|
|
}
|
|
|
|
|
|
static void LeaveArgumentsAdaptorFrame(MacroAssembler* masm) {
|
|
// ----------- S t a t e -------------
|
|
// -- r0 : result being passed through
|
|
// -----------------------------------
|
|
// Get the number of arguments passed (as a smi), tear down the frame and
|
|
// then tear down the parameters.
|
|
__ ldr(r1, MemOperand(fp, -(StandardFrameConstants::kFixedFrameSizeFromFp +
|
|
kPointerSize)));
|
|
|
|
if (FLAG_enable_ool_constant_pool) {
|
|
__ add(sp, fp, Operand(StandardFrameConstants::kConstantPoolOffset));
|
|
__ ldm(ia_w, sp, pp.bit() | fp.bit() | lr.bit());
|
|
} else {
|
|
__ mov(sp, fp);;
|
|
__ ldm(ia_w, sp, fp.bit() | lr.bit());
|
|
}
|
|
__ add(sp, sp, Operand::PointerOffsetFromSmiKey(r1));
|
|
__ add(sp, sp, Operand(kPointerSize)); // adjust for receiver
|
|
}
|
|
|
|
|
|
void Builtins::Generate_ArgumentsAdaptorTrampoline(MacroAssembler* masm) {
|
|
// ----------- S t a t e -------------
|
|
// -- r0 : actual number of arguments
|
|
// -- r1 : function (passed through to callee)
|
|
// -- r2 : expected number of arguments
|
|
// -----------------------------------
|
|
|
|
Label stack_overflow;
|
|
ArgumentAdaptorStackCheck(masm, &stack_overflow);
|
|
Label invoke, dont_adapt_arguments;
|
|
|
|
Label enough, too_few;
|
|
__ ldr(r3, FieldMemOperand(r1, JSFunction::kCodeEntryOffset));
|
|
__ cmp(r0, r2);
|
|
__ b(lt, &too_few);
|
|
__ cmp(r2, Operand(SharedFunctionInfo::kDontAdaptArgumentsSentinel));
|
|
__ b(eq, &dont_adapt_arguments);
|
|
|
|
{ // Enough parameters: actual >= expected
|
|
__ bind(&enough);
|
|
EnterArgumentsAdaptorFrame(masm);
|
|
|
|
// Calculate copy start address into r0 and copy end address into r2.
|
|
// r0: actual number of arguments as a smi
|
|
// r1: function
|
|
// r2: expected number of arguments
|
|
// r3: code entry to call
|
|
__ add(r0, fp, Operand::PointerOffsetFromSmiKey(r0));
|
|
// adjust for return address and receiver
|
|
__ add(r0, r0, Operand(2 * kPointerSize));
|
|
__ sub(r2, r0, Operand(r2, LSL, kPointerSizeLog2));
|
|
|
|
// Copy the arguments (including the receiver) to the new stack frame.
|
|
// r0: copy start address
|
|
// r1: function
|
|
// r2: copy end address
|
|
// r3: code entry to call
|
|
|
|
Label copy;
|
|
__ bind(©);
|
|
__ ldr(ip, MemOperand(r0, 0));
|
|
__ push(ip);
|
|
__ cmp(r0, r2); // Compare before moving to next argument.
|
|
__ sub(r0, r0, Operand(kPointerSize));
|
|
__ b(ne, ©);
|
|
|
|
__ b(&invoke);
|
|
}
|
|
|
|
{ // Too few parameters: Actual < expected
|
|
__ bind(&too_few);
|
|
EnterArgumentsAdaptorFrame(masm);
|
|
|
|
// Calculate copy start address into r0 and copy end address is fp.
|
|
// r0: actual number of arguments as a smi
|
|
// r1: function
|
|
// r2: expected number of arguments
|
|
// r3: code entry to call
|
|
__ add(r0, fp, Operand::PointerOffsetFromSmiKey(r0));
|
|
|
|
// Copy the arguments (including the receiver) to the new stack frame.
|
|
// r0: copy start address
|
|
// r1: function
|
|
// r2: expected number of arguments
|
|
// r3: code entry to call
|
|
Label copy;
|
|
__ bind(©);
|
|
// Adjust load for return address and receiver.
|
|
__ ldr(ip, MemOperand(r0, 2 * kPointerSize));
|
|
__ push(ip);
|
|
__ cmp(r0, fp); // Compare before moving to next argument.
|
|
__ sub(r0, r0, Operand(kPointerSize));
|
|
__ b(ne, ©);
|
|
|
|
// Fill the remaining expected arguments with undefined.
|
|
// r1: function
|
|
// r2: expected number of arguments
|
|
// r3: code entry to call
|
|
__ LoadRoot(ip, Heap::kUndefinedValueRootIndex);
|
|
__ sub(r2, fp, Operand(r2, LSL, kPointerSizeLog2));
|
|
// Adjust for frame.
|
|
__ sub(r2, r2, Operand(StandardFrameConstants::kFixedFrameSizeFromFp +
|
|
2 * kPointerSize));
|
|
|
|
Label fill;
|
|
__ bind(&fill);
|
|
__ push(ip);
|
|
__ cmp(sp, r2);
|
|
__ b(ne, &fill);
|
|
}
|
|
|
|
// Call the entry point.
|
|
__ bind(&invoke);
|
|
__ Call(r3);
|
|
|
|
// Store offset of return address for deoptimizer.
|
|
masm->isolate()->heap()->SetArgumentsAdaptorDeoptPCOffset(masm->pc_offset());
|
|
|
|
// Exit frame and return.
|
|
LeaveArgumentsAdaptorFrame(masm);
|
|
__ Jump(lr);
|
|
|
|
|
|
// -------------------------------------------
|
|
// Dont adapt arguments.
|
|
// -------------------------------------------
|
|
__ bind(&dont_adapt_arguments);
|
|
__ Jump(r3);
|
|
|
|
__ bind(&stack_overflow);
|
|
{
|
|
FrameScope frame(masm, StackFrame::MANUAL);
|
|
EnterArgumentsAdaptorFrame(masm);
|
|
__ InvokeBuiltin(Builtins::STACK_OVERFLOW, CALL_FUNCTION);
|
|
__ bkpt(0);
|
|
}
|
|
}
|
|
|
|
|
|
#undef __
|
|
|
|
} } // namespace v8::internal
|
|
|
|
#endif // V8_TARGET_ARCH_ARM
|