src/full-codegen/arm64/full-codegen-arm64.cc - Issue 1969423002: [Interpreter] Remove InterpreterExitTrampoline and replace with returning to the entry trampoline.

Unified Diff: src/full-codegen/arm64/full-codegen-arm64.cc

Issue 1969423002: [Interpreter] Remove InterpreterExitTrampoline and replace with returning to the entry trampoline. (Closed) Base URL: https://chromium.googlesource.com/v8/v8.git@master

Patch Set: Review comments Created 4 years, 7 months ago

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Index: src/full-codegen/arm64/full-codegen-arm64.cc

diff --git a/src/full-codegen/arm64/full-codegen-arm64.cc b/src/full-codegen/arm64/full-codegen-arm64.cc

index aafcd674ca30b74b71dd927f89d90458ebbb7090..f3228a07955f9d1207972f3fa8c60ab304fa02bf 100644

--- a/src/full-codegen/arm64/full-codegen-arm64.cc

+++ b/src/full-codegen/arm64/full-codegen-arm64.cc

@@ -179,7 +179,8 @@ void FullCodeGenerator::Generate() {

__ Mov(x10, Operand(info->scope()->GetScopeInfo(info->isolate())));

__ Push(x1, x10);

__ CallRuntime(Runtime::kNewScriptContext);

- PrepareForBailoutForId(BailoutId::ScriptContext(), TOS_REG);

+ PrepareForBailoutForId(BailoutId::ScriptContext(),

+ BailoutState::TOS_REGISTER);

// The new target value is not used, clobbering is safe.

DCHECK_NULL(info->scope()->new_target_var());

} else {

@@ -235,7 +236,8 @@ void FullCodeGenerator::Generate() {

// Register holding this function and new target are both trashed in case we

// bailout here. But since that can happen only when new target is not used

// and we allocate a context, the value of |function_in_register| is correct.

- PrepareForBailoutForId(BailoutId::FunctionContext(), NO_REGISTERS);

+ PrepareForBailoutForId(BailoutId::FunctionContext(),

+ BailoutState::NO_REGISTERS);

// Possibly set up a local binding to the this function which is used in

// derived constructors with super calls.

@@ -297,7 +299,8 @@ void FullCodeGenerator::Generate() {

}

// Visit the declarations and body.

- PrepareForBailoutForId(BailoutId::FunctionEntry(), NO_REGISTERS);

+ PrepareForBailoutForId(BailoutId::FunctionEntry(),

+ BailoutState::NO_REGISTERS);

{

Comment cmnt(masm_, "[ Declarations");

VisitDeclarations(scope()->declarations());

@@ -310,7 +313,8 @@ void FullCodeGenerator::Generate() {

{

Comment cmnt(masm_, "[ Stack check");

- PrepareForBailoutForId(BailoutId::Declarations(), NO_REGISTERS);

+ PrepareForBailoutForId(BailoutId::Declarations(),

+ BailoutState::NO_REGISTERS);

Label ok;

DCHECK(jssp.Is(__ StackPointer()));

__ CompareRoot(jssp, Heap::kStackLimitRootIndex);

@@ -393,11 +397,11 @@ void FullCodeGenerator::EmitBackEdgeBookkeeping(IterationStatement* stmt,

EmitProfilingCounterReset();

__ Bind(&ok);

- PrepareForBailoutForId(stmt->EntryId(), NO_REGISTERS);

+ PrepareForBailoutForId(stmt->EntryId(), BailoutState::NO_REGISTERS);

// Record a mapping of the OSR id to this PC. This is used if the OSR

// entry becomes the target of a bailout. We don't expect it to be, but

// we want it to work if it is.

- PrepareForBailoutForId(stmt->OsrEntryId(), NO_REGISTERS);

+ PrepareForBailoutForId(stmt->OsrEntryId(), BailoutState::NO_REGISTERS);

}

void FullCodeGenerator::EmitProfilingCounterHandlingForReturnSequence(

@@ -728,7 +732,7 @@ void FullCodeGenerator::PrepareForBailoutBeforeSplit(Expression* expr,

if (should_normalize) {

__ B(&skip);

}

- PrepareForBailout(expr, TOS_REG);

+ PrepareForBailout(expr, BailoutState::TOS_REGISTER);

if (should_normalize) {

__ CompareRoot(x0, Heap::kTrueValueRootIndex);

Split(eq, if_true, if_false, NULL);

@@ -786,7 +790,7 @@ void FullCodeGenerator::VisitVariableDeclaration(

__ LoadRoot(x10, Heap::kTheHoleValueRootIndex);

__ Str(x10, ContextMemOperand(cp, variable->index()));

// No write barrier since the_hole_value is in old space.

- PrepareForBailoutForId(proxy->id(), NO_REGISTERS);

+ PrepareForBailoutForId(proxy->id(), BailoutState::NO_REGISTERS);

}

break;

@@ -808,7 +812,7 @@ void FullCodeGenerator::VisitVariableDeclaration(

}

__ Push(Smi::FromInt(variable->DeclarationPropertyAttributes()));

__ CallRuntime(Runtime::kDeclareLookupSlot);

- PrepareForBailoutForId(proxy->id(), NO_REGISTERS);

+ PrepareForBailoutForId(proxy->id(), BailoutState::NO_REGISTERS);

break;

}

@@ -854,7 +858,7 @@ void FullCodeGenerator::VisitFunctionDeclaration(

kDontSaveFPRegs,

EMIT_REMEMBERED_SET,

OMIT_SMI_CHECK);

- PrepareForBailoutForId(proxy->id(), NO_REGISTERS);

+ PrepareForBailoutForId(proxy->id(), BailoutState::NO_REGISTERS);

break;

}

@@ -866,7 +870,7 @@ void FullCodeGenerator::VisitFunctionDeclaration(

VisitForStackValue(declaration->fun());

PushOperand(Smi::FromInt(variable->DeclarationPropertyAttributes()));

CallRuntimeWithOperands(Runtime::kDeclareLookupSlot);

- PrepareForBailoutForId(proxy->id(), NO_REGISTERS);

+ PrepareForBailoutForId(proxy->id(), BailoutState::NO_REGISTERS);

break;

}

@@ -903,7 +907,7 @@ void FullCodeGenerator::VisitSwitchStatement(SwitchStatement* stmt) {

// Keep the switch value on the stack until a case matches.

VisitForStackValue(stmt->tag());

- PrepareForBailoutForId(stmt->EntryId(), NO_REGISTERS);

+ PrepareForBailoutForId(stmt->EntryId(), BailoutState::NO_REGISTERS);

ZoneList<CaseClause*>* clauses = stmt->cases();

CaseClause* default_clause = NULL; // Can occur anywhere in the list.

@@ -950,7 +954,7 @@ void FullCodeGenerator::VisitSwitchStatement(SwitchStatement* stmt) {

Label skip;

__ B(&skip);

- PrepareForBailout(clause, TOS_REG);

+ PrepareForBailout(clause, BailoutState::TOS_REGISTER);

__ JumpIfNotRoot(x0, Heap::kTrueValueRootIndex, &next_test);

__ Drop(1);

__ B(clause->body_target());

@@ -976,12 +980,12 @@ void FullCodeGenerator::VisitSwitchStatement(SwitchStatement* stmt) {

Comment cmnt(masm_, "[ Case body");

CaseClause* clause = clauses->at(i);

__ Bind(clause->body_target());

- PrepareForBailoutForId(clause->EntryId(), NO_REGISTERS);

+ PrepareForBailoutForId(clause->EntryId(), BailoutState::NO_REGISTERS);

VisitStatements(clause->statements());

}

__ Bind(nested_statement.break_label());

- PrepareForBailoutForId(stmt->ExitId(), NO_REGISTERS);

+ PrepareForBailoutForId(stmt->ExitId(), BailoutState::NO_REGISTERS);

}

@@ -1014,7 +1018,7 @@ void FullCodeGenerator::VisitForInStatement(ForInStatement* stmt) {

ToObjectStub stub(isolate());

__ CallStub(&stub);

__ Bind(&done_convert);

- PrepareForBailoutForId(stmt->ToObjectId(), TOS_REG);

+ PrepareForBailoutForId(stmt->ToObjectId(), BailoutState::TOS_REGISTER);

__ Push(x0);

// Check cache validity in generated code. If we cannot guarantee cache

@@ -1034,7 +1038,7 @@ void FullCodeGenerator::VisitForInStatement(ForInStatement* stmt) {

__ Bind(&call_runtime);

__ Push(x0); // Duplicate the enumerable object on the stack.

__ CallRuntime(Runtime::kForInEnumerate);

- PrepareForBailoutForId(stmt->EnumId(), TOS_REG);

+ PrepareForBailoutForId(stmt->EnumId(), BailoutState::TOS_REGISTER);

// If we got a map from the runtime call, we can do a fast

// modification check. Otherwise, we got a fixed array, and we have

@@ -1070,7 +1074,7 @@ void FullCodeGenerator::VisitForInStatement(ForInStatement* stmt) {

__ Mov(x1, Smi::FromInt(1)); // Smi(1) indicates slow check.

__ Ldr(x2, FieldMemOperand(x0, FixedArray::kLengthOffset));

__ Push(x1, x0, x2); // Smi and array, fixed array length (as smi).

- PrepareForBailoutForId(stmt->PrepareId(), NO_REGISTERS);

+ PrepareForBailoutForId(stmt->PrepareId(), BailoutState::NO_REGISTERS);

__ Push(xzr); // Initial index.

// Generate code for doing the condition check.

@@ -1110,7 +1114,7 @@ void FullCodeGenerator::VisitForInStatement(ForInStatement* stmt) {

// just skip it.

__ Push(x1, x3);

__ CallRuntime(Runtime::kForInFilter);

- PrepareForBailoutForId(stmt->FilterId(), TOS_REG);

+ PrepareForBailoutForId(stmt->FilterId(), BailoutState::TOS_REGISTER);

__ Mov(x3, x0);

__ JumpIfRoot(x0, Heap::kUndefinedValueRootIndex,

loop_statement.continue_label());

@@ -1122,11 +1126,11 @@ void FullCodeGenerator::VisitForInStatement(ForInStatement* stmt) {

// Perform the assignment as if via '='.

{ EffectContext context(this);

EmitAssignment(stmt->each(), stmt->EachFeedbackSlot());

- PrepareForBailoutForId(stmt->AssignmentId(), NO_REGISTERS);

+ PrepareForBailoutForId(stmt->AssignmentId(), BailoutState::NO_REGISTERS);

}

// Both Crankshaft and Turbofan expect BodyId to be right before stmt->body().

- PrepareForBailoutForId(stmt->BodyId(), NO_REGISTERS);

+ PrepareForBailoutForId(stmt->BodyId(), BailoutState::NO_REGISTERS);

// Generate code for the body of the loop.

Visit(stmt->body());

@@ -1146,7 +1150,7 @@ void FullCodeGenerator::VisitForInStatement(ForInStatement* stmt) {

DropOperands(5);

// Exit and decrement the loop depth.

- PrepareForBailoutForId(stmt->ExitId(), NO_REGISTERS);

+ PrepareForBailoutForId(stmt->ExitId(), BailoutState::NO_REGISTERS);

__ Bind(&exit);

decrement_loop_depth();

}

@@ -1299,7 +1303,7 @@ void FullCodeGenerator::EmitVariableLoad(VariableProxy* proxy,

TypeofMode typeof_mode) {

// Record position before possible IC call.

SetExpressionPosition(proxy);

- PrepareForBailoutForId(proxy->BeforeId(), NO_REGISTERS);

+ PrepareForBailoutForId(proxy->BeforeId(), BailoutState::NO_REGISTERS);

Variable* var = proxy->var();

// Three cases: global variables, lookup variables, and all other types of

@@ -1407,7 +1411,7 @@ void FullCodeGenerator::VisitObjectLiteral(ObjectLiteral* expr) {

__ CallStub(&stub);

RestoreContext();

}

- PrepareForBailoutForId(expr->CreateLiteralId(), TOS_REG);

+ PrepareForBailoutForId(expr->CreateLiteralId(), BailoutState::TOS_REGISTER);

// If result_saved is true the result is on top of the stack. If

// result_saved is false the result is in x0.

@@ -1443,7 +1447,7 @@ void FullCodeGenerator::VisitObjectLiteral(ObjectLiteral* expr) {

__ Peek(StoreDescriptor::ReceiverRegister(), 0);

EmitLoadStoreICSlot(property->GetSlot(0));

CallStoreIC();

- PrepareForBailoutForId(key->id(), NO_REGISTERS);

+ PrepareForBailoutForId(key->id(), BailoutState::NO_REGISTERS);

if (NeedsHomeObject(value)) {

EmitSetHomeObjectAccumulator(value, 0, property->GetSlot(1));

@@ -1476,7 +1480,7 @@ void FullCodeGenerator::VisitObjectLiteral(ObjectLiteral* expr) {

VisitForStackValue(value);

CallRuntimeWithOperands(Runtime::kInternalSetPrototype);

PrepareForBailoutForId(expr->GetIdForPropertySet(property_index),

- NO_REGISTERS);

+ BailoutState::NO_REGISTERS);

break;

case ObjectLiteral::Property::GETTER:

if (property->emit_store()) {

@@ -1533,7 +1537,7 @@ void FullCodeGenerator::VisitObjectLiteral(ObjectLiteral* expr) {

DCHECK(property->emit_store());

CallRuntimeWithOperands(Runtime::kInternalSetPrototype);

PrepareForBailoutForId(expr->GetIdForPropertySet(property_index),

- NO_REGISTERS);

+ BailoutState::NO_REGISTERS);

} else {

EmitPropertyKey(property, expr->GetIdForPropertyName(property_index));

VisitForStackValue(value);

@@ -1604,7 +1608,7 @@ void FullCodeGenerator::VisitArrayLiteral(ArrayLiteral* expr) {

FastCloneShallowArrayStub stub(isolate(), allocation_site_mode);

__ CallStub(&stub);

}

- PrepareForBailoutForId(expr->CreateLiteralId(), TOS_REG);

+ PrepareForBailoutForId(expr->CreateLiteralId(), BailoutState::TOS_REGISTER);

bool result_saved = false; // Is the result saved to the stack?

ZoneList<Expression*>* subexprs = expr->values();

@@ -1634,7 +1638,8 @@ void FullCodeGenerator::VisitArrayLiteral(ArrayLiteral* expr) {

CodeFactory::KeyedStoreIC(isolate(), language_mode()).code();

CallIC(ic);

- PrepareForBailoutForId(expr->GetIdForElement(array_index), NO_REGISTERS);

+ PrepareForBailoutForId(expr->GetIdForElement(array_index),

+ BailoutState::NO_REGISTERS);

}

// In case the array literal contains spread expressions it has two parts. The

@@ -1654,7 +1659,8 @@ void FullCodeGenerator::VisitArrayLiteral(ArrayLiteral* expr) {

VisitForStackValue(subexpr);

CallRuntimeWithOperands(Runtime::kAppendElement);

- PrepareForBailoutForId(expr->GetIdForElement(array_index), NO_REGISTERS);

+ PrepareForBailoutForId(expr->GetIdForElement(array_index),

+ BailoutState::NO_REGISTERS);

}

if (result_saved) {

@@ -1734,23 +1740,27 @@ void FullCodeGenerator::VisitAssignment(Assignment* expr) {

switch (assign_type) {

case VARIABLE:

EmitVariableLoad(expr->target()->AsVariableProxy());

- PrepareForBailout(expr->target(), TOS_REG);

+ PrepareForBailout(expr->target(), BailoutState::TOS_REGISTER);

break;

case NAMED_PROPERTY:

EmitNamedPropertyLoad(property);

- PrepareForBailoutForId(property->LoadId(), TOS_REG);

+ PrepareForBailoutForId(property->LoadId(),

+ BailoutState::TOS_REGISTER);

break;

case NAMED_SUPER_PROPERTY:

EmitNamedSuperPropertyLoad(property);

- PrepareForBailoutForId(property->LoadId(), TOS_REG);

+ PrepareForBailoutForId(property->LoadId(),

+ BailoutState::TOS_REGISTER);

break;

case KEYED_SUPER_PROPERTY:

EmitKeyedSuperPropertyLoad(property);

- PrepareForBailoutForId(property->LoadId(), TOS_REG);

+ PrepareForBailoutForId(property->LoadId(),

+ BailoutState::TOS_REGISTER);

break;

case KEYED_PROPERTY:

EmitKeyedPropertyLoad(property);

- PrepareForBailoutForId(property->LoadId(), TOS_REG);

+ PrepareForBailoutForId(property->LoadId(),

+ BailoutState::TOS_REGISTER);

break;

}

@@ -1770,7 +1780,7 @@ void FullCodeGenerator::VisitAssignment(Assignment* expr) {

}

// Deoptimization point in case the binary operation may have side effects.

- PrepareForBailout(expr->binary_operation(), TOS_REG);

+ PrepareForBailout(expr->binary_operation(), BailoutState::TOS_REGISTER);

} else {

VisitForAccumulatorValue(expr->value());

}

@@ -1782,7 +1792,7 @@ void FullCodeGenerator::VisitAssignment(Assignment* expr) {

case VARIABLE:

EmitVariableAssignment(expr->target()->AsVariableProxy()->var(),

expr->op(), expr->AssignmentSlot());

- PrepareForBailoutForId(expr->AssignmentId(), TOS_REG);

+ PrepareForBailoutForId(expr->AssignmentId(), BailoutState::TOS_REGISTER);

context()->Plug(x0);

break;

case NAMED_PROPERTY:

@@ -2162,7 +2172,7 @@ void FullCodeGenerator::EmitNamedPropertyAssignment(Assignment* expr) {

EmitLoadStoreICSlot(expr->AssignmentSlot());

CallStoreIC();

- PrepareForBailoutForId(expr->AssignmentId(), TOS_REG);

+ PrepareForBailoutForId(expr->AssignmentId(), BailoutState::TOS_REGISTER);

context()->Plug(x0);

}

@@ -2210,7 +2220,7 @@ void FullCodeGenerator::EmitKeyedPropertyAssignment(Assignment* expr) {

EmitLoadStoreICSlot(expr->AssignmentSlot());

CallIC(ic);

- PrepareForBailoutForId(expr->AssignmentId(), TOS_REG);

+ PrepareForBailoutForId(expr->AssignmentId(), BailoutState::TOS_REGISTER);

context()->Plug(x0);

}

@@ -2234,7 +2244,7 @@ void FullCodeGenerator::EmitCallWithLoadIC(Call* expr) {

if (callee->IsVariableProxy()) {

{ StackValueContext context(this);

EmitVariableLoad(callee->AsVariableProxy());

- PrepareForBailout(callee, NO_REGISTERS);

+ PrepareForBailout(callee, BailoutState::NO_REGISTERS);

}

// Push undefined as receiver. This is patched in the method prologue if it

// is a sloppy mode method.

@@ -2251,7 +2261,8 @@ void FullCodeGenerator::EmitCallWithLoadIC(Call* expr) {

DCHECK(!callee->AsProperty()->IsSuperAccess());

__ Peek(LoadDescriptor::ReceiverRegister(), 0);

EmitNamedPropertyLoad(callee->AsProperty());

- PrepareForBailoutForId(callee->AsProperty()->LoadId(), TOS_REG);

+ PrepareForBailoutForId(callee->AsProperty()->LoadId(),

+ BailoutState::TOS_REGISTER);

// Push the target function under the receiver.

PopOperand(x10);

PushOperands(x0, x10);

@@ -2291,7 +2302,7 @@ void FullCodeGenerator::EmitSuperCallWithLoadIC(Call* expr) {

// - home_object

// - key

CallRuntimeWithOperands(Runtime::kLoadFromSuper);

- PrepareForBailoutForId(prop->LoadId(), TOS_REG);

+ PrepareForBailoutForId(prop->LoadId(), BailoutState::TOS_REGISTER);

// Replace home_object with target function.

__ Poke(x0, kPointerSize);

@@ -2317,7 +2328,8 @@ void FullCodeGenerator::EmitKeyedCallWithLoadIC(Call* expr,

__ Peek(LoadDescriptor::ReceiverRegister(), 0);

__ Move(LoadDescriptor::NameRegister(), x0);

EmitKeyedPropertyLoad(callee->AsProperty());

- PrepareForBailoutForId(callee->AsProperty()->LoadId(), TOS_REG);

+ PrepareForBailoutForId(callee->AsProperty()->LoadId(),

+ BailoutState::TOS_REGISTER);

// Push the target function under the receiver.

PopOperand(x10);

@@ -2353,7 +2365,7 @@ void FullCodeGenerator::EmitKeyedSuperCallWithLoadIC(Call* expr) {

// - home_object

// - key

CallRuntimeWithOperands(Runtime::kLoadKeyedFromSuper);

- PrepareForBailoutForId(prop->LoadId(), TOS_REG);

+ PrepareForBailoutForId(prop->LoadId(), BailoutState::TOS_REGISTER);

// Replace home_object with target function.

__ Poke(x0, kPointerSize);

@@ -2374,7 +2386,7 @@ void FullCodeGenerator::EmitCall(Call* expr, ConvertReceiverMode mode) {

VisitForStackValue(args->at(i));

}

- PrepareForBailoutForId(expr->CallId(), NO_REGISTERS);

+ PrepareForBailoutForId(expr->CallId(), BailoutState::NO_REGISTERS);

SetCallPosition(expr, expr->tail_call_mode());

if (expr->tail_call_mode() == TailCallMode::kAllow) {

if (FLAG_trace) {

@@ -2443,7 +2455,7 @@ void FullCodeGenerator::PushCalleeAndWithBaseObject(Call* expr) {

__ Push(callee->name());

__ CallRuntime(Runtime::kLoadLookupSlotForCall);

PushOperands(x0, x1); // Receiver, function.

- PrepareForBailoutForId(expr->LookupId(), NO_REGISTERS);

+ PrepareForBailoutForId(expr->LookupId(), BailoutState::NO_REGISTERS);

// If fast case code has been generated, emit code to push the

// function and receiver and have the slow path jump around this

@@ -2492,7 +2504,7 @@ void FullCodeGenerator::EmitPossiblyEvalCall(Call* expr) {

// Touch up the stack with the resolved function.

__ Poke(x0, (arg_count + 1) * kPointerSize);

- PrepareForBailoutForId(expr->EvalId(), NO_REGISTERS);

+ PrepareForBailoutForId(expr->EvalId(), BailoutState::NO_REGISTERS);

// Record source position for debugger.

SetCallPosition(expr);

@@ -2544,7 +2556,7 @@ void FullCodeGenerator::VisitCallNew(CallNew* expr) {

CallConstructStub stub(isolate());

__ Call(stub.GetCode(), RelocInfo::CODE_TARGET);

OperandStackDepthDecrement(arg_count + 1);

- PrepareForBailoutForId(expr->ReturnId(), TOS_REG);

+ PrepareForBailoutForId(expr->ReturnId(), BailoutState::TOS_REGISTER);

RestoreContext();

context()->Plug(x0);

}

@@ -2977,7 +2989,7 @@ void FullCodeGenerator::EmitCall(CallRuntime* expr) {

for (Expression* const arg : *args) {

VisitForStackValue(arg);

}

- PrepareForBailoutForId(expr->CallId(), NO_REGISTERS);

+ PrepareForBailoutForId(expr->CallId(), BailoutState::NO_REGISTERS);

// Move target to x1.

int const argc = args->length() - 2;

__ Peek(x1, (argc + 1) * kXRegSize);

@@ -3196,12 +3208,14 @@ void FullCodeGenerator::VisitUnaryOperation(UnaryOperation* expr) {

if (!context()->IsAccumulatorValue()) OperandStackDepthIncrement(1);

__ Bind(&materialize_true);

- PrepareForBailoutForId(expr->MaterializeTrueId(), NO_REGISTERS);

+ PrepareForBailoutForId(expr->MaterializeTrueId(),

+ BailoutState::NO_REGISTERS);

__ LoadRoot(result_register(), Heap::kTrueValueRootIndex);

__ B(&done);

__ Bind(&materialize_false);

- PrepareForBailoutForId(expr->MaterializeFalseId(), NO_REGISTERS);

+ PrepareForBailoutForId(expr->MaterializeFalseId(),

+ BailoutState::NO_REGISTERS);

__ LoadRoot(result_register(), Heap::kFalseValueRootIndex);

__ B(&done);

@@ -3301,9 +3315,9 @@ void FullCodeGenerator::VisitCountOperation(CountOperation* expr) {

// We need a second deoptimization point after loading the value

// in case evaluating the property load my have a side effect.

if (assign_type == VARIABLE) {

- PrepareForBailout(expr->expression(), TOS_REG);

+ PrepareForBailout(expr->expression(), BailoutState::TOS_REGISTER);

} else {

- PrepareForBailoutForId(prop->LoadId(), TOS_REG);

+ PrepareForBailoutForId(prop->LoadId(), BailoutState::TOS_REGISTER);

}

// Inline smi case if we are in a loop.

@@ -3352,7 +3366,7 @@ void FullCodeGenerator::VisitCountOperation(CountOperation* expr) {

// Convert old value into a number.

ToNumberStub convert_stub(isolate());

__ CallStub(&convert_stub);

- PrepareForBailoutForId(expr->ToNumberId(), TOS_REG);

+ PrepareForBailoutForId(expr->ToNumberId(), BailoutState::TOS_REGISTER);

// Save result for postfix expressions.

if (expr->is_postfix()) {

@@ -3401,7 +3415,8 @@ void FullCodeGenerator::VisitCountOperation(CountOperation* expr) {

{ EffectContext context(this);

EmitVariableAssignment(expr->expression()->AsVariableProxy()->var(),

Token::ASSIGN, expr->CountSlot());

- PrepareForBailoutForId(expr->AssignmentId(), TOS_REG);

+ PrepareForBailoutForId(expr->AssignmentId(),

+ BailoutState::TOS_REGISTER);

context.Plug(x0);

}

// For all contexts except EffectConstant We have the result on

@@ -3412,7 +3427,8 @@ void FullCodeGenerator::VisitCountOperation(CountOperation* expr) {

} else {

EmitVariableAssignment(expr->expression()->AsVariableProxy()->var(),

Token::ASSIGN, expr->CountSlot());

- PrepareForBailoutForId(expr->AssignmentId(), TOS_REG);

+ PrepareForBailoutForId(expr->AssignmentId(),

+ BailoutState::TOS_REGISTER);

context()->Plug(x0);

}

break;

@@ -3422,7 +3438,7 @@ void FullCodeGenerator::VisitCountOperation(CountOperation* expr) {

PopOperand(StoreDescriptor::ReceiverRegister());

EmitLoadStoreICSlot(expr->CountSlot());

CallStoreIC();

- PrepareForBailoutForId(expr->AssignmentId(), TOS_REG);

+ PrepareForBailoutForId(expr->AssignmentId(), BailoutState::TOS_REGISTER);

if (expr->is_postfix()) {

if (!context()->IsEffect()) {

context()->PlugTOS();

@@ -3461,7 +3477,7 @@ void FullCodeGenerator::VisitCountOperation(CountOperation* expr) {

CodeFactory::KeyedStoreIC(isolate(), language_mode()).code();

EmitLoadStoreICSlot(expr->CountSlot());

CallIC(ic);

- PrepareForBailoutForId(expr->AssignmentId(), TOS_REG);

+ PrepareForBailoutForId(expr->AssignmentId(), BailoutState::TOS_REGISTER);

if (expr->is_postfix()) {

if (!context()->IsEffect()) {

context()->PlugTOS();

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