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[es6] Introduce spec compliant IsConstructor.

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There was already a bit on the Map named "function with prototype",
which basically meant that the Map was a map for a JSFunction that could
be used as a constructor. Now this CL generalizes that bit to
IsConstructor, which says that whatever (Heap)Object you are looking at
can be used as a constructor (i.e. the bit is also set for bound
functions that can be used as constructors and proxies that have a
[[Construct]] internal method).

This way we have a single chokepoint for IsConstructor checking, which
allows us to get rid of the various ways in which we tried to guess
whether something could be used as a constructor or not.

Drive-by-fix: Renamed IsConstructor on FunctionKind to
IsClassConstructor to resolve the weird name clash, and the
IsClassConstructor name also matches the spec.

CQ_INCLUDE_TRYBOTS=tryserver.v8:v8_linux_layout_dbg,v8_linux_nosnap_dbg
R=jarin@chromium.org, rossberg@chromium.org
BUG=v8:4413, v8:4430
LOG=n

Committed: https://crrev.com/8de4d9351df4cf66c8a128d561a6e331d196be54
Cr-Commit-Position: refs/heads/master@{#30900}

Review URL: https://codereview.chromium.org/1358423002

Cr-Commit-Position: refs/heads/master@{#30902}
This commit is contained in:
bmeurer 2015-09-23 23:50:01 -07:00 committed by Commit bot
parent 656ebdce8d
commit 8fe3ac0701
28 changed files with 312 additions and 225 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
src/accessors.cc
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@ -929,7 +929,7 @@ MUST_USE_RESULT static MaybeHandle<Object> SetFunctionPrototype(
MaybeHandle<Object> Accessors::FunctionSetPrototype(Handle<JSFunction> function,
Handle<Object> prototype) {
DCHECK(function->should_have_prototype());
DCHECK(function->IsConstructor());
Isolate* isolate = function->GetIsolate();
return SetFunctionPrototype(isolate, function, prototype);
}

1
src/api-natives.cc
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@ -494,6 +494,7 @@ Handle<JSFunction> ApiNatives::CreateApiFunction(
// Mark instance as callable in the map.
if (!obj->instance_call_handler()->IsUndefined()) {
map->set_is_callable();
map->set_is_constructor(true);
}
// Recursively copy parent instance templates' accessors,

63
src/arm/builtins-arm.cc
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@ -1635,6 +1635,21 @@ void Builtins::Generate_ConstructFunction(MacroAssembler* masm) {
}
// static
void Builtins::Generate_ConstructProxy(MacroAssembler* masm) {
// ----------- S t a t e -------------
// -- r0 : the number of arguments (not including the receiver)
// -- r1 : the constructor to call (checked to be a JSFunctionProxy)
// -- r3 : the original constructor (either the same as the constructor or
// the JSFunction on which new was invoked initially)
// -----------------------------------
// TODO(neis): This doesn't match the ES6 spec for [[Construct]] on proxies.
__ ldr(r1, FieldMemOperand(r1, JSFunctionProxy::kConstructTrapOffset));
__ Jump(masm->isolate()->builtins()->Call(), RelocInfo::CODE_TARGET);
}
// static
void Builtins::Generate_Construct(MacroAssembler* masm) {
// ----------- S t a t e -------------
@ -1644,35 +1659,35 @@ void Builtins::Generate_Construct(MacroAssembler* masm) {
// the JSFunction on which new was invoked initially)
// -----------------------------------
Label non_callable, non_function;
__ JumpIfSmi(r1, &non_callable);
__ CompareObjectType(r1, r4, r5, JS_FUNCTION_TYPE);
// Check if target has a [[Construct]] internal method.
Label non_constructor;
__ JumpIfSmi(r1, &non_constructor);
__ ldr(r4, FieldMemOperand(r1, HeapObject::kMapOffset));
__ ldrb(r2, FieldMemOperand(r4, Map::kBitFieldOffset));
__ tst(r2, Operand(1 << Map::kIsConstructor));
__ b(eq, &non_constructor);
// Dispatch based on instance type.
__ CompareInstanceType(r4, r5, JS_FUNCTION_TYPE);
__ Jump(masm->isolate()->builtins()->ConstructFunction(),
RelocInfo::CODE_TARGET, eq);
__ cmp(r5, Operand(JS_FUNCTION_PROXY_TYPE));
__ b(ne, &non_function);
__ Jump(masm->isolate()->builtins()->ConstructProxy(), RelocInfo::CODE_TARGET,
eq);
// 1. Construct of function proxy.
// TODO(neis): This doesn't match the ES6 spec for [[Construct]] on proxies.
__ ldr(r1, FieldMemOperand(r1, JSFunctionProxy::kConstructTrapOffset));
__ Jump(masm->isolate()->builtins()->Call(), RelocInfo::CODE_TARGET);
// Called Construct on an exotic Object with a [[Construct]] internal method.
{
// Overwrite the original receiver with the (original) target.
__ str(r1, MemOperand(sp, r0, LSL, kPointerSizeLog2));
// Let the "call_as_constructor_delegate" take care of the rest.
__ LoadGlobalFunction(Context::CALL_AS_CONSTRUCTOR_DELEGATE_INDEX, r1);
__ Jump(masm->isolate()->builtins()->CallFunction(),
RelocInfo::CODE_TARGET);
}
// 2. Construct of something that else, which might have a [[Construct]]
// internal method (if not we raise an exception).
__ bind(&non_function);
// Check if target has a [[Call]] internal method.
// TODO(bmeurer): This shoud use IsConstructor once available.
__ ldrb(r4, FieldMemOperand(r4, Map::kBitFieldOffset));
__ tst(r4, Operand(1 << Map::kIsCallable));
__ b(eq, &non_callable);
// Overwrite the original receiver the (original) target.
__ str(r1, MemOperand(sp, r0, LSL, kPointerSizeLog2));
// Let the "call_as_constructor_delegate" take care of the rest.
__ LoadGlobalFunction(Context::CALL_AS_CONSTRUCTOR_DELEGATE_INDEX, r1);
__ Jump(masm->isolate()->builtins()->CallFunction(), RelocInfo::CODE_TARGET);
// 3. Construct of something that is not callable.
__ bind(&non_callable);
// Called Construct on an Object that doesn't have a [[Construct]] internal
// method.
__ bind(&non_constructor);
{
FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL);
__ Push(r1);

61
src/arm64/builtins-arm64.cc
View File

@ -1692,6 +1692,21 @@ void Builtins::Generate_ConstructFunction(MacroAssembler* masm) {
}
// static
void Builtins::Generate_ConstructProxy(MacroAssembler* masm) {
// ----------- S t a t e -------------
// -- x0 : the number of arguments (not including the receiver)
// -- x1 : the constructor to call (checked to be a JSFunctionProxy)
// -- x3 : the original constructor (either the same as the constructor or
// the JSFunction on which new was invoked initially)
// -----------------------------------
// TODO(neis): This doesn't match the ES6 spec for [[Construct]] on proxies.
__ Ldr(x1, FieldMemOperand(x1, JSFunctionProxy::kConstructTrapOffset));
__ Jump(masm->isolate()->builtins()->Call(), RelocInfo::CODE_TARGET);
}
// static
void Builtins::Generate_Construct(MacroAssembler* masm) {
// ----------- S t a t e -------------
@ -1701,34 +1716,34 @@ void Builtins::Generate_Construct(MacroAssembler* masm) {
// the JSFunction on which new was invoked initially)
// -----------------------------------
Label non_callable, non_function;
__ JumpIfSmi(x1, &non_callable);
__ CompareObjectType(x1, x4, x5, JS_FUNCTION_TYPE);
// Check if target has a [[Construct]] internal method.
Label non_constructor;
__ JumpIfSmi(x1, &non_constructor);
__ Ldr(x4, FieldMemOperand(x1, HeapObject::kMapOffset));
__ Ldrb(x2, FieldMemOperand(x4, Map::kBitFieldOffset));
__ TestAndBranchIfAllClear(x2, 1 << Map::kIsConstructor, &non_constructor);
// Dispatch based on instance type.
__ CompareInstanceType(x4, x5, JS_FUNCTION_TYPE);
__ Jump(masm->isolate()->builtins()->ConstructFunction(),
RelocInfo::CODE_TARGET, eq);
__ Cmp(x5, JS_FUNCTION_PROXY_TYPE);
__ B(ne, &non_function);
__ Jump(masm->isolate()->builtins()->ConstructProxy(), RelocInfo::CODE_TARGET,
eq);
// 1. Construct of function proxy.
// TODO(neis): This doesn't match the ES6 spec for [[Construct]] on proxies.
__ Ldr(x1, FieldMemOperand(x1, JSFunctionProxy::kConstructTrapOffset));
__ Jump(masm->isolate()->builtins()->Call(), RelocInfo::CODE_TARGET);
// Called Construct on an exotic Object with a [[Construct]] internal method.
{
// Overwrite the original receiver with the (original) target.
__ Poke(x1, Operand(x0, LSL, kXRegSizeLog2));
// Let the "call_as_constructor_delegate" take care of the rest.
__ LoadGlobalFunction(Context::CALL_AS_CONSTRUCTOR_DELEGATE_INDEX, x1);
__ Jump(masm->isolate()->builtins()->CallFunction(),
RelocInfo::CODE_TARGET);
}
// 2. Construct of something that else, which might have a [[Construct]]
// internal method (if not we raise an exception).
__ Bind(&non_function);
// Check if target has a [[Call]] internal method.
// TODO(bmeurer): This shoud use IsConstructor once available.
__ Ldrb(x4, FieldMemOperand(x4, Map::kBitFieldOffset));
__ TestAndBranchIfAllClear(x4, 1 << Map::kIsCallable, &non_callable);
// Overwrite the original receiver with the (original) target.
__ Poke(x1, Operand(x0, LSL, kXRegSizeLog2));
// Let the "call_as_constructor_delegate" take care of the rest.
__ LoadGlobalFunction(Context::CALL_AS_CONSTRUCTOR_DELEGATE_INDEX, x1);
__ Jump(masm->isolate()->builtins()->CallFunction(), RelocInfo::CODE_TARGET);
// 3. Construct of something that is not callable.
__ bind(&non_callable);
// Called Construct on an Object that doesn't have a [[Construct]] internal
// method.
__ bind(&non_constructor);
{
FrameScope scope(masm, StackFrame::INTERNAL);
__ Push(x1);

8
src/bootstrapper.cc
View File

@ -487,7 +487,7 @@ void Genesis::SetFunctionInstanceDescriptor(Handle<Map> map,
Handle<Map> Genesis::CreateSloppyFunctionMap(FunctionMode function_mode) {
Handle<Map> map = factory()->NewMap(JS_FUNCTION_TYPE, JSFunction::kSize);
SetFunctionInstanceDescriptor(map, function_mode);
map->set_function_with_prototype(IsFunctionModeWithPrototype(function_mode));
map->set_is_constructor(IsFunctionModeWithPrototype(function_mode));
map->set_is_callable();
return map;
}
@ -727,7 +727,7 @@ Handle<Map> Genesis::CreateStrictFunctionMap(
FunctionMode function_mode, Handle<JSFunction> empty_function) {
Handle<Map> map = factory()->NewMap(JS_FUNCTION_TYPE, JSFunction::kSize);
SetStrictFunctionInstanceDescriptor(map, function_mode);
map->set_function_with_prototype(IsFunctionModeWithPrototype(function_mode));
map->set_is_constructor(IsFunctionModeWithPrototype(function_mode));
map->set_is_callable();
Map::SetPrototype(map, empty_function);
return map;
@ -738,7 +738,7 @@ Handle<Map> Genesis::CreateStrongFunctionMap(
Handle<JSFunction> empty_function, bool is_constructor) {
Handle<Map> map = factory()->NewMap(JS_FUNCTION_TYPE, JSFunction::kSize);
SetStrongFunctionInstanceDescriptor(map);
map->set_function_with_prototype(is_constructor);
map->set_is_constructor(is_constructor);
Map::SetPrototype(map, empty_function);
map->set_is_callable();
map->set_is_extensible(is_constructor);
@ -1373,7 +1373,6 @@ void Genesis::InitializeGlobal(Handle<GlobalObject> global_object,
}
// @@iterator method is added later.
map->set_function_with_prototype(true);
map->SetInObjectProperties(2);
native_context()->set_sloppy_arguments_map(*map);
@ -1439,7 +1438,6 @@ void Genesis::InitializeGlobal(Handle<GlobalObject> global_object,
}
// @@iterator method is added later.
map->set_function_with_prototype(true);
DCHECK_EQ(native_context()->object_function()->prototype(),
*isolate->initial_object_prototype());
Map::SetPrototype(map, isolate->initial_object_prototype());

3
src/builtins.h
View File

@ -78,6 +78,7 @@ enum BuiltinExtraArguments {
V(Call, BUILTIN, UNINITIALIZED, kNoExtraICState) \
\
V(ConstructFunction, BUILTIN, UNINITIALIZED, kNoExtraICState) \
V(ConstructProxy, BUILTIN, UNINITIALIZED, kNoExtraICState) \
V(Construct, BUILTIN, UNINITIALIZED, kNoExtraICState) \
\
V(PushArgsAndCall, BUILTIN, UNINITIALIZED, kNoExtraICState) \
@ -281,6 +282,8 @@ class Builtins {
// ES6 section 9.2.2 [[Construct]] ( argumentsList, newTarget)
static void Generate_ConstructFunction(MacroAssembler* masm);
// ES6 section 9.5.14 [[Construct]] ( argumentsList, newTarget)
static void Generate_ConstructProxy(MacroAssembler* masm);
// ES6 section 7.3.13 Construct (F, [argumentsList], [newTarget])
static void Generate_Construct(MacroAssembler* masm);

2
src/contexts.h
View File

@ -513,7 +513,7 @@ class Context: public FixedArray {
: SLOPPY_GENERATOR_FUNCTION_MAP_INDEX;
}
if (IsConstructor(kind)) {
if (IsClassConstructor(kind)) {
// Use strict function map (no own "caller" / "arguments")
return is_strong(language_mode) ? STRONG_CONSTRUCTOR_MAP_INDEX
: STRICT_FUNCTION_MAP_INDEX;

3
src/factory.cc
View File

@ -1930,6 +1930,7 @@ Handle<JSProxy> Factory::NewJSFunctionProxy(Handle<Object> handler,
Handle<Map> map = NewMap(JS_FUNCTION_PROXY_TYPE, JSFunctionProxy::kSize);
Map::SetPrototype(map, prototype);
map->set_is_callable();
map->set_is_constructor(construct_trap->IsCallable());
// Allocate the proxy object.
Handle<JSFunctionProxy> result = New<JSFunctionProxy>(map, NEW_SPACE);
@ -1991,7 +1992,7 @@ void Factory::ReinitializeJSProxy(Handle<JSProxy> proxy, InstanceType type,
// Functions require some minimal initialization.
if (type == JS_FUNCTION_TYPE) {
map->set_function_with_prototype(true);
map->set_is_constructor(true);
map->set_is_callable();
Handle<JSFunction> js_function = Handle<JSFunction>::cast(proxy);
InitializeFunction(js_function, shared.ToHandleChecked(), context);

2
src/globals.h
View File

@ -997,7 +997,7 @@ inline bool IsSubclassConstructor(FunctionKind kind) {
}
inline bool IsConstructor(FunctionKind kind) {
inline bool IsClassConstructor(FunctionKind kind) {
DCHECK(IsValidFunctionKind(kind));
return kind &
(FunctionKind::kBaseConstructor | FunctionKind::kSubclassConstructor |

5
src/hydrogen.cc
View File

@ -6418,7 +6418,8 @@ bool HOptimizedGraphBuilder::PropertyAccessInfo::CanAccessMonomorphic() {
if (!CanInlinePropertyAccess(map_)) return false;
if (IsJSObjectFieldAccessor()) return IsLoad();
if (IsJSArrayBufferViewFieldAccessor()) return IsLoad();
if (map_->function_with_prototype() && !map_->has_non_instance_prototype() &&
if (map_->IsJSFunctionMap() && map_->is_constructor() &&
!map_->has_non_instance_prototype() &&
name_.is_identical_to(isolate()->factory()->prototype_string())) {
return IsLoad();
}
@ -6532,7 +6533,7 @@ HValue* HOptimizedGraphBuilder::BuildMonomorphicAccess(
}
if (info->name().is_identical_to(isolate()->factory()->prototype_string()) &&
info->map()->function_with_prototype()) {
info->map()->IsJSFunctionMap() && info->map()->is_constructor()) {
DCHECK(!info->map()->has_non_instance_prototype());
return New<HLoadFunctionPrototype>(checked_object);
}

61
src/ia32/builtins-ia32.cc
View File

@ -1566,6 +1566,21 @@ void Builtins::Generate_ConstructFunction(MacroAssembler* masm) {
}
// static
void Builtins::Generate_ConstructProxy(MacroAssembler* masm) {
// ----------- S t a t e -------------
// -- eax : the number of arguments (not including the receiver)
// -- edx : the original constructor (either the same as the constructor or
// the JSFunction on which new was invoked initially)
// -- edi : the constructor to call (checked to be a JSFunctionProxy)
// -----------------------------------
// TODO(neis): This doesn't match the ES6 spec for [[Construct]] on proxies.
__ mov(edi, FieldOperand(edi, JSFunctionProxy::kConstructTrapOffset));
__ Jump(masm->isolate()->builtins()->Call(), RelocInfo::CODE_TARGET);
}
// static
void Builtins::Generate_Construct(MacroAssembler* masm) {
// ----------- S t a t e -------------
@ -1575,34 +1590,34 @@ void Builtins::Generate_Construct(MacroAssembler* masm) {
// -- edi : the constructor to call (can be any Object)
// -----------------------------------
Label non_callable, non_function;
__ JumpIfSmi(edi, &non_callable);
__ CmpObjectType(edi, JS_FUNCTION_TYPE, ecx);
// Check if target has a [[Construct]] internal method.
Label non_constructor;
__ JumpIfSmi(edi, &non_constructor, Label::kNear);
__ mov(ecx, FieldOperand(edi, HeapObject::kMapOffset));
__ test_b(FieldOperand(ecx, Map::kBitFieldOffset), 1 << Map::kIsConstructor);
__ j(zero, &non_constructor, Label::kNear);
// Dispatch based on instance type.
__ CmpInstanceType(ecx, JS_FUNCTION_TYPE);
__ j(equal, masm->isolate()->builtins()->ConstructFunction(),
RelocInfo::CODE_TARGET);
__ CmpInstanceType(ecx, JS_FUNCTION_PROXY_TYPE);
__ j(not_equal, &non_function, Label::kNear);
__ j(equal, masm->isolate()->builtins()->ConstructProxy(),
RelocInfo::CODE_TARGET);
// 1. Construct of function proxy.
// TODO(neis): This doesn't match the ES6 spec for [[Construct]] on proxies.
__ mov(edi, FieldOperand(edi, JSFunctionProxy::kConstructTrapOffset));
__ Jump(masm->isolate()->builtins()->Call(), RelocInfo::CODE_TARGET);
// Called Construct on an exotic Object with a [[Construct]] internal method.
{
// Overwrite the original receiver with the (original) target.
__ mov(Operand(esp, eax, times_pointer_size, kPointerSize), edi);
// Let the "call_as_constructor_delegate" take care of the rest.
__ LoadGlobalFunction(Context::CALL_AS_CONSTRUCTOR_DELEGATE_INDEX, edi);
__ Jump(masm->isolate()->builtins()->CallFunction(),
RelocInfo::CODE_TARGET);
}
// 2. Construct of something else, which might have a [[Construct]] internal
// method (if not we raise an exception).
__ bind(&non_function);
// Check if target has a [[Call]] internal method.
// TODO(bmeurer): This shoud use IsConstructor once available.
__ test_b(FieldOperand(ecx, Map::kBitFieldOffset), 1 << Map::kIsCallable);
__ j(zero, &non_callable, Label::kNear);
// Overwrite the original receiver with the (original) target.
__ mov(Operand(esp, eax, times_pointer_size, kPointerSize), edi);
// Let the "call_as_constructor_delegate" take care of the rest.
__ LoadGlobalFunction(Context::CALL_AS_CONSTRUCTOR_DELEGATE_INDEX, edi);
__ Jump(masm->isolate()->builtins()->CallFunction(), RelocInfo::CODE_TARGET);
// 3. Construct of something that is not callable.
__ bind(&non_callable);
// Called Construct on an Object that doesn't have a [[Construct]] internal
// method.
__ bind(&non_constructor);
{
FrameScope scope(masm, StackFrame::INTERNAL);
__ Push(edi);

2
src/ic/ic.cc
View File

@ -1159,7 +1159,7 @@ Handle<Code> LoadIC::CompileHandler(LookupIterator* lookup,
// Use specialized code for getting prototype of functions.
if (receiver->IsJSFunction() &&
Name::Equals(isolate()->factory()->prototype_string(), lookup->name()) &&
Handle<JSFunction>::cast(receiver)->should_have_prototype() &&
receiver->IsConstructor() &&
!Handle<JSFunction>::cast(receiver)
->map()
->has_non_instance_prototype()) {

67
src/mips/builtins-mips.cc
View File

@ -1648,6 +1648,21 @@ void Builtins::Generate_ConstructFunction(MacroAssembler* masm) {
}
// static
void Builtins::Generate_ConstructProxy(MacroAssembler* masm) {
// ----------- S t a t e -------------
// -- a0 : the number of arguments (not including the receiver)
// -- a1 : the constructor to call (checked to be a JSFunctionProxy)
// -- a3 : the original constructor (either the same as the constructor or
// the JSFunction on which new was invoked initially)
// -----------------------------------
// TODO(neis): This doesn't match the ES6 spec for [[Construct]] on proxies.
__ lw(a1, FieldMemOperand(a1, JSFunctionProxy::kConstructTrapOffset));
__ Jump(masm->isolate()->builtins()->Call(), RelocInfo::CODE_TARGET);
}
// static
void Builtins::Generate_Construct(MacroAssembler* masm) {
// ----------- S t a t e -------------
@ -1657,36 +1672,36 @@ void Builtins::Generate_Construct(MacroAssembler* masm) {
// the JSFunction on which new was invoked initially)
// -----------------------------------
Label non_callable, non_function;
__ JumpIfSmi(a1, &non_callable);
__ GetObjectType(a1, t1, t2);
// Check if target has a [[Construct]] internal method.
Label non_constructor;
__ JumpIfSmi(a1, &non_constructor);
__ lw(t1, FieldMemOperand(a1, HeapObject::kMapOffset));
__ lbu(t2, FieldMemOperand(t1, Map::kBitFieldOffset));
__ And(t2, t2, Operand(1 << Map::kIsCallable));
__ Branch(&non_constructor, eq, t2, Operand(zero_reg));
// Dispatch based on instance type.
__ lbu(t2, FieldMemOperand(t1, Map::kInstanceTypeOffset));
__ Jump(masm->isolate()->builtins()->ConstructFunction(),
RelocInfo::CODE_TARGET, eq, t2, Operand(JS_FUNCTION_TYPE));
__ Branch(&non_function, ne, t2, Operand(JS_FUNCTION_PROXY_TYPE));
__ Jump(masm->isolate()->builtins()->ConstructProxy(), RelocInfo::CODE_TARGET,
eq, t2, Operand(JS_FUNCTION_PROXY_TYPE));
// 1. Construct of function proxy.
// TODO(neis): This doesn't match the ES6 spec for [[Construct]] on proxies.
__ lw(a1, FieldMemOperand(a1, JSFunctionProxy::kConstructTrapOffset));
__ Jump(masm->isolate()->builtins()->Call(), RelocInfo::CODE_TARGET);
// Called Construct on an exotic Object with a [[Construct]] internal method.
{
// Overwrite the original receiver with the (original) target.
__ sll(at, a0, kPointerSizeLog2);
__ addu(at, sp, at);
__ sw(a1, MemOperand(at));
// Let the "call_as_constructor_delegate" take care of the rest.
__ LoadGlobalFunction(Context::CALL_AS_CONSTRUCTOR_DELEGATE_INDEX, a1);
__ Jump(masm->isolate()->builtins()->CallFunction(),
RelocInfo::CODE_TARGET);
}
// 2. Construct of something that else, which might have a [[Construct]]
// internal method (if not we raise an exception).
__ bind(&non_function);
// Check if target has a [[Call]] internal method.
// TODO(bmeurer): This shoud use IsConstructor once available.
__ lbu(t1, FieldMemOperand(t1, Map::kBitFieldOffset));
__ And(t1, t1, Operand(1 << Map::kIsCallable));
__ Branch(&non_callable, eq, t1, Operand(zero_reg));
// Overwrite the original receiver with the (original) target.
__ sll(at, a0, kPointerSizeLog2);
__ addu(at, sp, at);
__ sw(a1, MemOperand(at));
// Let the "call_as_constructor_delegate" take care of the rest.
__ LoadGlobalFunction(Context::CALL_AS_CONSTRUCTOR_DELEGATE_INDEX, a1);
__ Jump(masm->isolate()->builtins()->CallFunction(), RelocInfo::CODE_TARGET);
// 3. Construct of something that is not callable.
__ bind(&non_callable);
// Called Construct on an Object that doesn't have a [[Construct]] internal
// method.
__ bind(&non_constructor);
{
FrameScope scope(masm, StackFrame::INTERNAL);
__ Push(a1);

67
src/mips64/builtins-mips64.cc
View File

@ -1644,6 +1644,21 @@ void Builtins::Generate_ConstructFunction(MacroAssembler* masm) {
}
// static
void Builtins::Generate_ConstructProxy(MacroAssembler* masm) {
// ----------- S t a t e -------------
// -- a0 : the number of arguments (not including the receiver)
// -- a1 : the constructor to call (checked to be a JSFunctionProxy)
// -- a3 : the original constructor (either the same as the constructor or
// the JSFunction on which new was invoked initially)
// -----------------------------------
// TODO(neis): This doesn't match the ES6 spec for [[Construct]] on proxies.
__ ld(a1, FieldMemOperand(a1, JSFunctionProxy::kConstructTrapOffset));
__ Jump(masm->isolate()->builtins()->Call(), RelocInfo::CODE_TARGET);
}
// static
void Builtins::Generate_Construct(MacroAssembler* masm) {
// ----------- S t a t e -------------
@ -1653,36 +1668,36 @@ void Builtins::Generate_Construct(MacroAssembler* masm) {
// the JSFunction on which new was invoked initially)
// -----------------------------------
Label non_callable, non_function;
__ JumpIfSmi(a1, &non_callable);
__ GetObjectType(a1, t1, t2);
// Check if target has a [[Construct]] internal method.
Label non_constructor;
__ JumpIfSmi(a1, &non_constructor);
__ ld(t1, FieldMemOperand(a1, HeapObject::kMapOffset));
__ lbu(t2, FieldMemOperand(t1, Map::kBitFieldOffset));
__ And(t2, t2, Operand(1 << Map::kIsCallable));
__ Branch(&non_constructor, eq, t2, Operand(zero_reg));
// Dispatch based on instance type.
__ lbu(t2, FieldMemOperand(t1, Map::kInstanceTypeOffset));
__ Jump(masm->isolate()->builtins()->ConstructFunction(),
RelocInfo::CODE_TARGET, eq, t2, Operand(JS_FUNCTION_TYPE));
__ Branch(&non_function, ne, t2, Operand(JS_FUNCTION_PROXY_TYPE));
__ Jump(masm->isolate()->builtins()->ConstructProxy(), RelocInfo::CODE_TARGET,
eq, t2, Operand(JS_FUNCTION_PROXY_TYPE));
// 1. Construct of function proxy.
// TODO(neis): This doesn't match the ES6 spec for [[Construct]] on proxies.
__ ld(a1, FieldMemOperand(a1, JSFunctionProxy::kConstructTrapOffset));
__ Jump(masm->isolate()->builtins()->Call(), RelocInfo::CODE_TARGET);
// Called Construct on an exotic Object with a [[Construct]] internal method.
{
// Overwrite the original receiver with the (original) target.
__ dsll(at, a0, kPointerSizeLog2);
__ daddu(at, sp, at);
__ sd(a1, MemOperand(at));
// Let the "call_as_constructor_delegate" take care of the rest.
__ LoadGlobalFunction(Context::CALL_AS_CONSTRUCTOR_DELEGATE_INDEX, a1);
__ Jump(masm->isolate()->builtins()->CallFunction(),
RelocInfo::CODE_TARGET);
}
// 2. Construct of something that else, which might have a [[Construct]]
// internal method (if not we raise an exception).
__ bind(&non_function);
// Check if target has a [[Call]] internal method.
// TODO(bmeurer): This shoud use IsConstructor once available.
__ lbu(t1, FieldMemOperand(t1, Map::kBitFieldOffset));
__ And(t1, t1, Operand(1 << Map::kIsCallable));
__ Branch(&non_callable, eq, t1, Operand(zero_reg));
// Overwrite the original receiver with the (original) target.
__ dsll(at, a0, kPointerSizeLog2);
__ daddu(at, sp, at);
__ sd(a1, MemOperand(at));
// Let the "call_as_constructor_delegate" take care of the rest.
__ LoadGlobalFunction(Context::CALL_AS_CONSTRUCTOR_DELEGATE_INDEX, a1);
__ Jump(masm->isolate()->builtins()->CallFunction(), RelocInfo::CODE_TARGET);
// 3. Construct of something that is not callable.
__ bind(&non_callable);
// Called Construct on an Object that doesn't have a [[Construct]] internal
// method.
__ bind(&non_constructor);
{
FrameScope scope(masm, StackFrame::INTERNAL);
__ Push(a1);

2
src/objects-debug.cc
View File

@ -22,6 +22,7 @@ void Object::ObjectVerify() {
} else {
HeapObject::cast(this)->HeapObjectVerify();
}
CHECK(!IsConstructor() || IsCallable());
}
@ -37,6 +38,7 @@ void Object::VerifyPointer(Object* p) {
void Smi::SmiVerify() {
CHECK(IsSmi());
CHECK(!IsCallable());
CHECK(!IsConstructor());
}

24
src/objects-inl.h
View File

@ -192,6 +192,12 @@ bool Object::IsCallable() const {
}
bool Object::IsConstructor() const {
return Object::IsHeapObject() &&
HeapObject::cast(this)->map()->is_constructor();
}
bool Object::IsSpecObject() const {
return Object::IsHeapObject()
&& HeapObject::cast(this)->map()->instance_type() >= FIRST_SPEC_OBJECT_TYPE;
@ -4532,13 +4538,17 @@ bool Map::has_non_instance_prototype() {
}
void Map::set_function_with_prototype(bool value) {
set_bit_field(FunctionWithPrototype::update(bit_field(), value));
void Map::set_is_constructor(bool value) {
if (value) {
set_bit_field(bit_field() | (1 << kIsConstructor));
} else {
set_bit_field(bit_field() & ~(1 << kIsConstructor));
}
}
bool Map::function_with_prototype() {
return FunctionWithPrototype::decode(bit_field());
bool Map::is_constructor() const {
return ((1 << kIsConstructor) & bit_field()) != 0;
}
@ -4795,6 +4805,7 @@ bool Map::IsJSObjectMap() {
return instance_type() >= FIRST_JS_OBJECT_TYPE;
}
bool Map::IsJSArrayMap() { return instance_type() == JS_ARRAY_TYPE; }
bool Map::IsJSFunctionMap() { return instance_type() == JS_FUNCTION_TYPE; }
bool Map::IsStringMap() { return instance_type() < FIRST_NONSTRING_TYPE; }
bool Map::IsJSProxyMap() {
InstanceType type = instance_type();
@ -6256,11 +6267,6 @@ Object* JSFunction::prototype() {
}
bool JSFunction::should_have_prototype() {
return map()->function_with_prototype();
}
bool JSFunction::is_compiled() {
Builtins* builtins = GetIsolate()->builtins();
return code() != builtins->builtin(Builtins::kCompileLazy) &&

1
src/objects-printer.cc
View File

@ -457,6 +457,7 @@ void Map::MapPrint(std::ostream& os) { // NOLINT
if (has_indexed_interceptor()) os << " - indexed_interceptor\n";
if (is_undetectable()) os << " - undetectable\n";
if (is_callable()) os << " - callable\n";
if (is_constructor()) os << " - constructor\n";
if (is_access_check_needed()) os << " - access_check_needed\n";
if (!is_extensible()) os << " - non-extensible\n";
if (is_observed()) os << " - observed\n";

2
src/objects.cc
View File

@ -10719,7 +10719,7 @@ void JSFunction::SetInstancePrototype(Handle<JSFunction> function,
void JSFunction::SetPrototype(Handle<JSFunction> function,
Handle<Object> value) {
DCHECK(function->should_have_prototype());
DCHECK(function->IsConstructor());
Handle<Object> construct_prototype = value;
// If the value is not a JSReceiver, store the value in the map's

18
src/objects.h
View File

@ -1033,6 +1033,9 @@ class Object {
// ES6, section 7.2.3 IsCallable.
INLINE(bool IsCallable() const);
// ES6, section 7.2.4 IsConstructor.
INLINE(bool IsConstructor() const);
INLINE(bool IsSpecObject()) const;
INLINE(bool IsTemplateInfo()) const;
INLINE(bool IsNameDictionary() const);
@ -5362,11 +5365,10 @@ class Map: public HeapObject {
inline void set_non_instance_prototype(bool value);
inline bool has_non_instance_prototype();
// Tells whether function has special prototype property. If not, prototype
// property will not be created when accessed (will return undefined),
// and construction from this function will not be allowed.
inline void set_function_with_prototype(bool value);
inline bool function_with_prototype();
// Tells whether the instance has a [[Construct]] internal method.
// This property is implemented according to ES6, section 7.2.4.
inline void set_is_constructor(bool value);
inline bool is_constructor() const;
// Tells whether the instance with this map should be ignored by the
// Object.getPrototypeOf() function and the __proto__ accessor.
@ -5394,7 +5396,7 @@ class Map: public HeapObject {
inline void set_is_observed();
inline bool is_observed();
// Tells whether the instance has a [[Call]] internal field.
// Tells whether the instance has a [[Call]] internal method.
// This property is implemented according to ES6, section 7.2.3.
inline void set_is_callable();
inline bool is_callable() const;
@ -5723,6 +5725,7 @@ class Map: public HeapObject {
inline bool IsPrimitiveMap();
inline bool IsJSObjectMap();
inline bool IsJSArrayMap();
inline bool IsJSFunctionMap();
inline bool IsStringMap();
inline bool IsJSProxyMap();
inline bool IsJSGlobalProxyMap();
@ -5827,7 +5830,7 @@ class Map: public HeapObject {
static const int kIsUndetectable = 4;
static const int kIsObserved = 5;
static const int kIsAccessCheckNeeded = 6;
class FunctionWithPrototype: public BitField<bool, 7, 1> {};
static const int kIsConstructor = 7;
// Bit positions for bit field 2
static const int kIsExtensible = 0;
@ -7142,7 +7145,6 @@ class JSFunction: public JSObject {
// After prototype is removed, it will not be created when accessed, and
// [[Construct]] from this function will not be allowed.
bool RemovePrototype();
inline bool should_have_prototype();
// Accessor for this function's initial map's [[class]]
// property. This is primarily used by ECMA native functions. This

13
src/parser.cc
View File

@ -1280,9 +1280,8 @@ void* Parser::ParseStatementList(ZoneList<Statement*>* body, int end_token,
Scanner::Location old_super_loc = function_state_->super_location();
Statement* stat = ParseStatementListItem(CHECK_OK);
if (is_strong(language_mode()) &&
scope_->is_function_scope() &&
i::IsConstructor(function_state_->kind())) {
if (is_strong(language_mode()) && scope_->is_function_scope() &&
IsClassConstructor(function_state_->kind())) {
Scanner::Location this_loc = function_state_->this_location();
Scanner::Location super_loc = function_state_->super_location();
if (this_loc.beg_pos != old_this_loc.beg_pos &&
@ -1336,7 +1335,7 @@ void* Parser::ParseStatementList(ZoneList<Statement*>* body, int end_token,
if (use_strong_found) {
scope_->SetLanguageMode(
static_cast<LanguageMode>(scope_->language_mode() | STRONG));
if (i::IsConstructor(function_state_->kind())) {
if (IsClassConstructor(function_state_->kind())) {
// "use strong" cannot occur in a class constructor body, to avoid
// unintuitive strong class object semantics.
ParserTraits::ReportMessageAt(
@ -2642,7 +2641,7 @@ Statement* Parser::ParseExpressionOrLabelledStatement(
// Fall through.
case Token::SUPER:
if (is_strong(language_mode()) &&
i::IsConstructor(function_state_->kind())) {
IsClassConstructor(function_state_->kind())) {
bool is_this = peek() == Token::THIS;
Expression* expr;
ExpressionClassifier classifier;
@ -2849,7 +2848,7 @@ Statement* Parser::ParseReturnStatement(bool* ok) {
}
} else {
if (is_strong(language_mode()) &&
i::IsConstructor(function_state_->kind())) {
IsClassConstructor(function_state_->kind())) {
int pos = peek_position();
ReportMessageAt(Scanner::Location(pos, pos + 1),
MessageTemplate::kStrongConstructorReturnValue);
@ -4604,7 +4603,7 @@ ZoneList<Statement*>* Parser::ParseEagerFunctionBody(
// For concise constructors, check that they are constructed,
// not called.
if (i::IsConstructor(kind)) {
if (IsClassConstructor(kind)) {
AddAssertIsConstruct(result, pos);
}

11
src/preparser.cc
View File

@ -232,9 +232,8 @@ void PreParser::ParseStatementList(int end_token, bool* ok,
Statement statement = ParseStatementListItem(ok);
if (!*ok) return;
if (is_strong(language_mode()) &&
scope_->is_function_scope() &&
i::IsConstructor(function_state_->kind())) {
if (is_strong(language_mode()) && scope_->is_function_scope() &&
IsClassConstructor(function_state_->kind())) {
Scanner::Location this_loc = function_state_->this_location();
Scanner::Location super_loc = function_state_->super_location();
if (this_loc.beg_pos != old_this_loc.beg_pos &&
@ -262,7 +261,7 @@ void PreParser::ParseStatementList(int end_token, bool* ok,
} else if (use_strong_found) {
scope_->SetLanguageMode(static_cast<LanguageMode>(
scope_->language_mode() | STRONG));
if (i::IsConstructor(function_state_->kind())) {
if (IsClassConstructor(function_state_->kind())) {
// "use strong" cannot occur in a class constructor body, to avoid
// unintuitive strong class object semantics.
PreParserTraits::ReportMessageAt(
@ -639,7 +638,7 @@ PreParser::Statement PreParser::ParseExpressionOrLabelledStatement(bool* ok) {
// Fall through.
case Token::SUPER:
if (is_strong(language_mode()) &&
i::IsConstructor(function_state_->kind())) {
IsClassConstructor(function_state_->kind())) {
bool is_this = peek() == Token::THIS;
Expression expr = Expression::Default();
ExpressionClassifier classifier;
@ -790,7 +789,7 @@ PreParser::Statement PreParser::ParseReturnStatement(bool* ok) {
tok != Token::RBRACE &&
tok != Token::EOS) {
if (is_strong(language_mode()) &&
i::IsConstructor(function_state_->kind())) {
IsClassConstructor(function_state_->kind())) {
int pos = peek_position();
ReportMessageAt(Scanner::Location(pos, pos + 1),
MessageTemplate::kStrongConstructorReturnValue);

4
src/preparser.h
View File

@ -2228,7 +2228,7 @@ ParserBase<Traits>::ParsePrimaryExpression(ExpressionClassifier* classifier,
if (FLAG_strong_this && is_strong(language_mode())) {
// Constructors' usages of 'this' in strong mode are parsed separately.
// TODO(rossberg): this does not work with arrow functions yet.
if (i::IsConstructor(function_state_->kind())) {
if (IsClassConstructor(function_state_->kind())) {
ReportMessage(MessageTemplate::kStrongConstructorThis);
*ok = false;
break;
@ -3612,7 +3612,7 @@ ParserBase<Traits>::ParseSuperExpression(bool is_new,
Scope* scope = scope_->ReceiverScope();
FunctionKind kind = scope->function_kind();
if (IsConciseMethod(kind) || IsAccessorFunction(kind) ||
i::IsConstructor(kind)) {
IsClassConstructor(kind)) {
if (peek() == Token::PERIOD || peek() == Token::LBRACK) {
scope->RecordSuperPropertyUsage();
return this->SuperPropertyReference(scope_, factory(), pos);

5
src/runtime/runtime-classes.cc
View File

@ -105,8 +105,9 @@ static MaybeHandle<Object> DefineClass(Isolate* isolate, Handle<Object> name,
} else {
if (super_class->IsNull()) {
prototype_parent = isolate->factory()->null_value();
} else if (super_class->IsJSFunction()) { // TODO(bmeurer): IsConstructor.
if (Handle<JSFunction>::cast(super_class)->shared()->is_generator()) {
} else if (super_class->IsConstructor()) {
if (super_class->IsJSFunction() &&
Handle<JSFunction>::cast(super_class)->shared()->is_generator()) {
THROW_NEW_ERROR(
isolate,
NewTypeError(MessageTemplate::kExtendsValueGenerator, super_class),

34
src/runtime/runtime-function.cc
View File

@ -159,7 +159,7 @@ RUNTIME_FUNCTION(Runtime_FunctionSetPrototype) {
CONVERT_ARG_HANDLE_CHECKED(JSFunction, fun, 0);
CONVERT_ARG_HANDLE_CHECKED(Object, value, 1);
RUNTIME_ASSERT(fun->should_have_prototype());
RUNTIME_ASSERT(fun->IsConstructor());
RETURN_FAILURE_ON_EXCEPTION(isolate,
Accessors::FunctionSetPrototype(fun, value));
return args[0]; // return TOS
@ -270,30 +270,10 @@ RUNTIME_FUNCTION(Runtime_SetNativeFlag) {
RUNTIME_FUNCTION(Runtime_IsConstructor) {
HandleScope handles(isolate);
RUNTIME_ASSERT(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(Object, object, 0);
// TODO(caitp): implement this in a better/simpler way, allow inlining via TF
if (object->IsJSFunction()) {
Handle<JSFunction> func = Handle<JSFunction>::cast(object);
bool should_have_prototype = func->should_have_prototype();
if (func->shared()->bound()) {
Handle<FixedArray> bound_args =
Handle<FixedArray>(FixedArray::cast(func->function_bindings()));
Handle<Object> bound_function(
JSReceiver::cast(bound_args->get(JSFunction::kBoundFunctionIndex)),
isolate);
if (bound_function->IsJSFunction()) {
Handle<JSFunction> bound = Handle<JSFunction>::cast(bound_function);
DCHECK(!bound->shared()->bound());
should_have_prototype = bound->should_have_prototype();
}
}
return isolate->heap()->ToBoolean(should_have_prototype);
}
return isolate->heap()->false_value();
SealHandleScope shs(isolate);
DCHECK_EQ(1, args.length());
CONVERT_ARG_CHECKED(Object, object, 0);
return isolate->heap()->ToBoolean(object->IsConstructor());
}
@ -437,6 +417,10 @@ RUNTIME_FUNCTION(Runtime_FunctionBindArguments) {
bound_function_map = Map::TransitionToPrototype(bound_function_map, proto,
REGULAR_PROTOTYPE);
}
if (bound_function_map->is_constructor() != bindee->IsConstructor()) {
bound_function_map = Map::Copy(bound_function_map, "IsConstructor");
bound_function_map->set_is_constructor(bindee->IsConstructor());
}
JSObject::MigrateToMap(bound_function, bound_function_map);
Handle<String> length_string = isolate->factory()->length_string();

5
src/runtime/runtime-object.cc
View File

@ -1056,9 +1056,8 @@ static Object* Runtime_NewObjectHelper(Isolate* isolate,
Handle<JSFunction>::cast(original_constructor);
// If function should not have prototype, construction is not allowed. In this
// case generated code bailouts here, since function has no initial_map.
if (!function->should_have_prototype() && !function->shared()->bound()) {
// Check that function is a constructor.
if (!function->IsConstructor()) {
THROW_NEW_ERROR_RETURN_FAILURE(
isolate, NewTypeError(MessageTemplate::kNotConstructor, constructor));
}

4
src/scopes.cc
View File

@ -357,7 +357,7 @@ void Scope::Initialize() {
Variable::NORMAL, kCreatedInitialized);
}
if (IsConciseMethod(function_kind_) || IsConstructor(function_kind_) ||
if (IsConciseMethod(function_kind_) || IsClassConstructor(function_kind_) ||
IsAccessorFunction(function_kind_)) {
variables_.Declare(this, ast_value_factory_->this_function_string(),
CONST, Variable::NORMAL, kCreatedInitialized);
@ -1285,7 +1285,7 @@ ClassVariable* Scope::ClassVariableForMethod() const {
// It needs to be investigated whether this causes any practical problems.
if (!is_function_scope()) return nullptr;
if (IsInObjectLiteral(function_kind_)) return nullptr;
if (!IsConciseMethod(function_kind_) && !IsConstructor(function_kind_) &&
if (!IsConciseMethod(function_kind_) && !IsClassConstructor(function_kind_) &&
!IsAccessorFunction(function_kind_)) {
return nullptr;
}

4
src/scopes.h
View File

@ -347,7 +347,7 @@ class Scope: public ZoneObject {
return scope_uses_super_property_ ||
(scope_calls_eval_ && (IsConciseMethod(function_kind()) ||
IsAccessorFunction(function_kind()) ||
IsConstructor(function_kind())));
IsClassConstructor(function_kind())));
}
const Scope* NearestOuterEvalScope() const {
@ -445,7 +445,7 @@ class Scope: public ZoneObject {
Variable* this_function_var() const {
// This is only used in derived constructors atm.
DCHECK(this_function_ == nullptr ||
(is_function_scope() && (IsConstructor(function_kind()) ||
(is_function_scope() && (IsClassConstructor(function_kind()) ||
IsConciseMethod(function_kind()) ||
IsAccessorFunction(function_kind()))));
return this_function_;

63
src/x64/builtins-x64.cc
View File

@ -1770,6 +1770,21 @@ void Builtins::Generate_ConstructFunction(MacroAssembler* masm) {
}
// static
void Builtins::Generate_ConstructProxy(MacroAssembler* masm) {
// ----------- S t a t e -------------
// -- rax : the number of arguments (not including the receiver)
// -- rdx : the original constructor (either the same as the constructor or
// the JSFunction on which new was invoked initially)
// -- rdi : the constructor to call (checked to be a JSFunctionProxy)
// -----------------------------------
// TODO(neis): This doesn't match the ES6 spec for [[Construct]] on proxies.
__ movp(rdi, FieldOperand(rdi, JSFunctionProxy::kConstructTrapOffset));
__ Jump(masm->isolate()->builtins()->Call(), RelocInfo::CODE_TARGET);
}
// static
void Builtins::Generate_Construct(MacroAssembler* masm) {
// ----------- S t a t e -------------
@ -1780,35 +1795,35 @@ void Builtins::Generate_Construct(MacroAssembler* masm) {
// -----------------------------------
StackArgumentsAccessor args(rsp, rax);
Label non_callable, non_function;
__ JumpIfSmi(rdi, &non_callable);
__ CmpObjectType(rdi, JS_FUNCTION_TYPE, rcx);
// Check if target has a [[Construct]] internal method.
Label non_constructor;
__ JumpIfSmi(rdi, &non_constructor, Label::kNear);
__ movp(rcx, FieldOperand(rdi, HeapObject::kMapOffset));
__ testb(FieldOperand(rcx, Map::kBitFieldOffset),
Immediate(1 << Map::kIsConstructor));
__ j(zero, &non_constructor, Label::kNear);
// Dispatch based on instance type.
__ CmpInstanceType(rcx, JS_FUNCTION_TYPE);
__ j(equal, masm->isolate()->builtins()->ConstructFunction(),
RelocInfo::CODE_TARGET);
__ CmpInstanceType(rcx, JS_FUNCTION_PROXY_TYPE);
__ j(not_equal, &non_function, Label::kNear);
__ j(equal, masm->isolate()->builtins()->ConstructProxy(),
RelocInfo::CODE_TARGET);
// 1. Construct of function proxy.
// TODO(neis): This doesn't match the ES6 spec for [[Construct]] on proxies.
__ movp(rdi, FieldOperand(rdi, JSFunctionProxy::kConstructTrapOffset));
__ Jump(masm->isolate()->builtins()->Call(), RelocInfo::CODE_TARGET);
// Called Construct on an exotic Object with a [[Construct]] internal method.
{
// Overwrite the original receiver with the (original) target.
__ movp(args.GetReceiverOperand(), rdi);
// Let the "call_as_constructor_delegate" take care of the rest.
__ LoadGlobalFunction(Context::CALL_AS_CONSTRUCTOR_DELEGATE_INDEX, rdi);
__ Jump(masm->isolate()->builtins()->CallFunction(),
RelocInfo::CODE_TARGET);
}
// 2. Construct of something else, which might have a [[Construct]] internal
// method (if not we raise an exception).
__ bind(&non_function);
// Check if target has a [[Call]] internal method.
// TODO(bmeurer): This shoud use IsConstructor once available.
__ testb(FieldOperand(rcx, Map::kBitFieldOffset),
Immediate(1 << Map::kIsCallable));
__ j(zero, &non_callable, Label::kNear);
// Overwrite the original receiver with the (original) target.
__ movp(args.GetReceiverOperand(), rdi);
// Let the "call_as_constructor_delegate" take care of the rest.
__ LoadGlobalFunction(Context::CALL_AS_CONSTRUCTOR_DELEGATE_INDEX, rdi);
__ Jump(masm->isolate()->builtins()->CallFunction(), RelocInfo::CODE_TARGET);
// 3. Construct of something that is not callable.
__ bind(&non_callable);
// Called Construct on an Object that doesn't have a [[Construct]] internal
// method.
__ bind(&non_constructor);
{
FrameScope scope(masm, StackFrame::INTERNAL);
__ Push(rdi);