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chromium / v8 / v8 / 43fc15bb795a203a01f409ed1f0dcada7a38f295 / . / src / full-codegen / s390 / full-codegen-s390.cc
blob: 501b1459a727c71d8bde25ad505a48da4ba66f93 [file] [log] [blame]
// Copyright 2015 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#if V8_TARGET_ARCH_S390
#include "src/ast/compile-time-value.h"
#include "src/ast/scopes.h"
#include "src/builtins/builtins-constructor.h"
#include "src/code-factory.h"
#include "src/code-stubs.h"
#include "src/codegen.h"
#include "src/compilation-info.h"
#include "src/compiler.h"
#include "src/debug/debug.h"
#include "src/full-codegen/full-codegen.h"
#include "src/ic/ic.h"
#include "src/s390/code-stubs-s390.h"
#include "src/s390/macro-assembler-s390.h"
namespace v8 {
namespace internal {
#define __ ACCESS_MASM(masm())
// A patch site is a location in the code which it is possible to patch. This
// class has a number of methods to emit the code which is patchable and the
// method EmitPatchInfo to record a marker back to the patchable code. This
// marker is a cmpi rx, #yyy instruction, and x * 0x0000ffff + yyy (raw 16 bit
// immediate value is used) is the delta from the pc to the first instruction of
// the patchable code.
// See PatchInlinedSmiCode in ic-s390.cc for the code that patches it
class JumpPatchSite BASE_EMBEDDED {
public:
explicit JumpPatchSite(MacroAssembler* masm) : masm_(masm) {
#ifdef DEBUG
info_emitted_ = false;
#endif
}
~JumpPatchSite() { DCHECK(patch_site_.is_bound() == info_emitted_); }
// When initially emitting this ensure that a jump is always generated to skip
// the inlined smi code.
void EmitJumpIfNotSmi(Register reg, Label* target) {
DCHECK(!patch_site_.is_bound() && !info_emitted_);
__ bind(&patch_site_);
__ CmpP(reg, reg);
// Emit the Nop to make bigger place for patching on 31-bit
// as the TestIfSmi sequence uses 4-byte TMLL
#ifndef V8_TARGET_ARCH_S390X
__ nop();
#endif
__ beq(target); // Always taken before patched.
}
// When initially emitting this ensure that a jump is never generated to skip
// the inlined smi code.
void EmitJumpIfSmi(Register reg, Label* target) {
DCHECK(!patch_site_.is_bound() && !info_emitted_);
__ bind(&patch_site_);
__ CmpP(reg, reg);
// Emit the Nop to make bigger place for patching on 31-bit
// as the TestIfSmi sequence uses 4-byte TMLL
#ifndef V8_TARGET_ARCH_S390X
__ nop();
#endif
__ bne(target); // Never taken before patched.
}
void EmitPatchInfo() {
if (patch_site_.is_bound()) {
int delta_to_patch_site = masm_->SizeOfCodeGeneratedSince(&patch_site_);
DCHECK(is_int16(delta_to_patch_site));
__ chi(r0, Operand(delta_to_patch_site));
#ifdef DEBUG
info_emitted_ = true;
#endif
} else {
__ nop();
__ nop();
}
}
private:
MacroAssembler* masm() { return masm_; }
MacroAssembler* masm_;
Label patch_site_;
#ifdef DEBUG
bool info_emitted_;
#endif
};
// Generate code for a JS function. On entry to the function the receiver
// and arguments have been pushed on the stack left to right. The actual
// argument count matches the formal parameter count expected by the
// function.
//
// The live registers are:
// o r3: the JS function object being called (i.e., ourselves)
// o r5: the new target value
// o cp: our context
// o fp: our caller's frame pointer
// o sp: stack pointer
// o lr: return address
// o ip: our own function entry (required by the prologue)
//
// The function builds a JS frame. Please see JavaScriptFrameConstants in
// frames-s390.h for its layout.
void FullCodeGenerator::Generate() {
CompilationInfo* info = info_;
profiling_counter_ = isolate()->factory()->NewCell(
Handle<Smi>(Smi::FromInt(FLAG_interrupt_budget), isolate()));
SetFunctionPosition(literal());
Comment cmnt(masm_, "[ function compiled by full code generator");
ProfileEntryHookStub::MaybeCallEntryHook(masm_);
if (FLAG_debug_code && info->ExpectsJSReceiverAsReceiver()) {
int receiver_offset = info->scope()->num_parameters() * kPointerSize;
__ LoadP(r4, MemOperand(sp, receiver_offset), r0);
__ AssertNotSmi(r4);
__ CompareObjectType(r4, r4, no_reg, FIRST_JS_RECEIVER_TYPE);
__ Assert(ge, kSloppyFunctionExpectsJSReceiverReceiver);
}
// Open a frame scope to indicate that there is a frame on the stack. The
// MANUAL indicates that the scope shouldn't actually generate code to set up
// the frame (that is done below).
FrameScope frame_scope(masm_, StackFrame::MANUAL);
int prologue_offset = masm_->pc_offset();
info->set_prologue_offset(prologue_offset);
__ Prologue(info->GeneratePreagedPrologue(), ip, prologue_offset);
// Increment invocation count for the function.
{
Comment cmnt(masm_, "[ Increment invocation count");
__ LoadP(r6, FieldMemOperand(r3, JSFunction::kFeedbackVectorOffset));
__ LoadP(r6, FieldMemOperand(r6, Cell::kValueOffset));
__ LoadP(r1, FieldMemOperand(
r6, FeedbackVector::kInvocationCountIndex * kPointerSize +
FeedbackVector::kHeaderSize));
__ AddSmiLiteral(r1, r1, Smi::FromInt(1), r0);
__ StoreP(r1, FieldMemOperand(
r6, FeedbackVector::kInvocationCountIndex * kPointerSize +
FeedbackVector::kHeaderSize));
}
{
Comment cmnt(masm_, "[ Allocate locals");
int locals_count = info->scope()->num_stack_slots();
OperandStackDepthIncrement(locals_count);
if (locals_count > 0) {
if (locals_count >= 128) {
Label ok;
__ AddP(ip, sp, Operand(-(locals_count * kPointerSize)));
__ LoadRoot(r5, Heap::kRealStackLimitRootIndex);
__ CmpLogicalP(ip, r5);
__ bge(&ok, Label::kNear);
__ CallRuntime(Runtime::kThrowStackOverflow);
__ bind(&ok);
}
__ LoadRoot(ip, Heap::kUndefinedValueRootIndex);
int kMaxPushes = FLAG_optimize_for_size ? 4 : 32;
if (locals_count >= kMaxPushes) {
int loop_iterations = locals_count / kMaxPushes;
__ mov(r4, Operand(loop_iterations));
Label loop_header;
__ bind(&loop_header);
// Do pushes.
// TODO(joransiu): Use MVC for better performance
__ lay(sp, MemOperand(sp, -kMaxPushes * kPointerSize));
for (int i = 0; i < kMaxPushes; i++) {
__ StoreP(ip, MemOperand(sp, i * kPointerSize));
}
// Continue loop if not done.
__ BranchOnCount(r4, &loop_header);
}
int remaining = locals_count % kMaxPushes;
// Emit the remaining pushes.
// TODO(joransiu): Use MVC for better performance
if (remaining > 0) {
__ lay(sp, MemOperand(sp, -remaining * kPointerSize));
for (int i = 0; i < remaining; i++) {
__ StoreP(ip, MemOperand(sp, i * kPointerSize));
}
}
}
}
bool function_in_register_r3 = true;
// Possibly allocate a local context.
if (info->scope()->NeedsContext()) {
// Argument to NewContext is the function, which is still in r3.
Comment cmnt(masm_, "[ Allocate context");
bool need_write_barrier = true;
int slots = info->scope()->num_heap_slots() - Context::MIN_CONTEXT_SLOTS;
if (info->scope()->is_script_scope()) {
__ push(r3);
__ Push(info->scope()->scope_info());
__ CallRuntime(Runtime::kNewScriptContext);
PrepareForBailoutForId(BailoutId::ScriptContext(),
BailoutState::TOS_REGISTER);
// The new target value is not used, clobbering is safe.
DCHECK_NULL(info->scope()->new_target_var());
} else {
if (info->scope()->new_target_var() != nullptr) {
__ push(r5); // Preserve new target.
}
if (slots <=
ConstructorBuiltinsAssembler::MaximumFunctionContextSlots()) {
Callable callable = CodeFactory::FastNewFunctionContext(
isolate(), info->scope()->scope_type());
__ mov(FastNewFunctionContextDescriptor::SlotsRegister(),
Operand(slots));
__ Call(callable.code(), RelocInfo::CODE_TARGET);
// Result of the FastNewFunctionContext builtin is always in new space.
need_write_barrier = false;
} else {
__ push(r3);
__ Push(Smi::FromInt(info->scope()->scope_type()));
__ CallRuntime(Runtime::kNewFunctionContext);
}
if (info->scope()->new_target_var() != nullptr) {
__ pop(r5); // Preserve new target.
}
}
function_in_register_r3 = false;
// Context is returned in r2. It replaces the context passed to us.
// It's saved in the stack and kept live in cp.
__ LoadRR(cp, r2);
__ StoreP(r2, MemOperand(fp, StandardFrameConstants::kContextOffset));
// Copy any necessary parameters into the context.
int num_parameters = info->scope()->num_parameters();
int first_parameter = info->scope()->has_this_declaration() ? -1 : 0;
for (int i = first_parameter; i < num_parameters; i++) {
Variable* var =
(i == -1) ? info->scope()->receiver() : info->scope()->parameter(i);
if (var->IsContextSlot()) {
int parameter_offset = StandardFrameConstants::kCallerSPOffset +
(num_parameters - 1 - i) * kPointerSize;
// Load parameter from stack.
__ LoadP(r2, MemOperand(fp, parameter_offset), r0);
// Store it in the context.
MemOperand target = ContextMemOperand(cp, var->index());
__ StoreP(r2, target);
// Update the write barrier.
if (need_write_barrier) {
__ RecordWriteContextSlot(cp, target.offset(), r2, r4,
kLRHasBeenSaved, kDontSaveFPRegs);
} else if (FLAG_debug_code) {
Label done;
__ JumpIfInNewSpace(cp, r2, &done);
__ Abort(kExpectedNewSpaceObject);
__ bind(&done);
}
}
}
}
// 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(),
BailoutState::NO_REGISTERS);
// We don't support new.target and rest parameters here.
DCHECK_NULL(info->scope()->new_target_var());
DCHECK_NULL(info->scope()->rest_parameter());
DCHECK_NULL(info->scope()->this_function_var());
Variable* arguments = info->scope()->arguments();
if (arguments != NULL) {
// Function uses arguments object.
Comment cmnt(masm_, "[ Allocate arguments object");
if (!function_in_register_r3) {
// Load this again, if it's used by the local context below.
__ LoadP(r3, MemOperand(fp, JavaScriptFrameConstants::kFunctionOffset));
}
if (is_strict(language_mode()) || !has_simple_parameters()) {
Callable callable = CodeFactory::FastNewStrictArguments(isolate());
__ Call(callable.code(), RelocInfo::CODE_TARGET);
RestoreContext();
} else if (literal()->has_duplicate_parameters()) {
__ Push(r3);
__ CallRuntime(Runtime::kNewSloppyArguments_Generic);
} else {
Callable callable = CodeFactory::FastNewSloppyArguments(isolate());
__ Call(callable.code(), RelocInfo::CODE_TARGET);
RestoreContext();
}
SetVar(arguments, r2, r3, r4);
}
if (FLAG_trace) {
__ CallRuntime(Runtime::kTraceEnter);
}
// Visit the declarations and body.
PrepareForBailoutForId(BailoutId::FunctionEntry(),
BailoutState::NO_REGISTERS);
{
Comment cmnt(masm_, "[ Declarations");
VisitDeclarations(scope()->declarations());
}
// Assert that the declarations do not use ICs. Otherwise the debugger
// won't be able to redirect a PC at an IC to the correct IC in newly
// recompiled code.
DCHECK_EQ(0, ic_total_count_);
{
Comment cmnt(masm_, "[ Stack check");
PrepareForBailoutForId(BailoutId::Declarations(),
BailoutState::NO_REGISTERS);
Label ok;
__ LoadRoot(ip, Heap::kStackLimitRootIndex);
__ CmpLogicalP(sp, ip);
__ bge(&ok, Label::kNear);
__ Call(isolate()->builtins()->StackCheck(), RelocInfo::CODE_TARGET);
__ bind(&ok);
}
{
Comment cmnt(masm_, "[ Body");
DCHECK(loop_depth() == 0);
VisitStatements(literal()->body());
DCHECK(loop_depth() == 0);
}
// Always emit a 'return undefined' in case control fell off the end of
// the body.
{
Comment cmnt(masm_, "[ return <undefined>;");
__ LoadRoot(r2, Heap::kUndefinedValueRootIndex);
}
EmitReturnSequence();
}
void FullCodeGenerator::ClearAccumulator() {
__ LoadSmiLiteral(r2, Smi::kZero);
}
void FullCodeGenerator::EmitProfilingCounterDecrement(int delta) {
__ mov(r4, Operand(profiling_counter_));
intptr_t smi_delta = reinterpret_cast<intptr_t>(Smi::FromInt(delta));
if (CpuFeatures::IsSupported(GENERAL_INSTR_EXT) && is_int8(-smi_delta)) {
__ AddP(FieldMemOperand(r4, Cell::kValueOffset), Operand(-smi_delta));
__ LoadP(r5, FieldMemOperand(r4, Cell::kValueOffset));
} else {
__ LoadP(r5, FieldMemOperand(r4, Cell::kValueOffset));
__ SubSmiLiteral(r5, r5, Smi::FromInt(delta), r0);
__ StoreP(r5, FieldMemOperand(r4, Cell::kValueOffset));
}
}
void FullCodeGenerator::EmitProfilingCounterReset() {
int reset_value = FLAG_interrupt_budget;
__ mov(r4, Operand(profiling_counter_));
__ LoadSmiLiteral(r5, Smi::FromInt(reset_value));
__ StoreP(r5, FieldMemOperand(r4, Cell::kValueOffset));
}
void FullCodeGenerator::EmitBackEdgeBookkeeping(IterationStatement* stmt,
Label* back_edge_target) {
Comment cmnt(masm_, "[ Back edge bookkeeping");
Label ok;
DCHECK(back_edge_target->is_bound());
int distance = masm_->SizeOfCodeGeneratedSince(back_edge_target) +
kCodeSizeMultiplier / 2;
int weight = Min(kMaxBackEdgeWeight, Max(1, distance / kCodeSizeMultiplier));
EmitProfilingCounterDecrement(weight);
{
// BackEdgeTable::PatchAt manipulates this sequence.
__ bge(&ok, Label::kNear);
__ Call(isolate()->builtins()->InterruptCheck(), RelocInfo::CODE_TARGET);
// Record a mapping of this PC offset to the OSR id. This is used to find
// the AST id from the unoptimized code in order to use it as a key into
// the deoptimization input data found in the optimized code.
RecordBackEdge(stmt->OsrEntryId());
}
EmitProfilingCounterReset();
__ bind(&ok);
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(), BailoutState::NO_REGISTERS);
}
void FullCodeGenerator::EmitProfilingCounterHandlingForReturnSequence(
bool is_tail_call) {
// Pretend that the exit is a backwards jump to the entry.
int weight = 1;
if (info_->ShouldSelfOptimize()) {
weight = FLAG_interrupt_budget / FLAG_self_opt_count;
} else {
int distance = masm_->pc_offset() + kCodeSizeMultiplier / 2;
weight = Min(kMaxBackEdgeWeight, Max(1, distance / kCodeSizeMultiplier));
}
EmitProfilingCounterDecrement(weight);
Label ok;
__ CmpP(r5, Operand::Zero());
__ bge(&ok);
// Don't need to save result register if we are going to do a tail call.
if (!is_tail_call) {
__ push(r2);
}
__ Call(isolate()->builtins()->InterruptCheck(), RelocInfo::CODE_TARGET);
if (!is_tail_call) {
__ pop(r2);
}
EmitProfilingCounterReset();
__ bind(&ok);
}
void FullCodeGenerator::EmitReturnSequence() {
Comment cmnt(masm_, "[ Return sequence");
if (return_label_.is_bound()) {
__ b(&return_label_);
} else {
__ bind(&return_label_);
if (FLAG_trace) {
// Push the return value on the stack as the parameter.
// Runtime::TraceExit returns its parameter in r2
__ push(r2);
__ CallRuntime(Runtime::kTraceExit);
}
EmitProfilingCounterHandlingForReturnSequence(false);
// Make sure that the constant pool is not emitted inside of the return
// sequence.
{
int32_t arg_count = info_->scope()->num_parameters() + 1;
int32_t sp_delta = arg_count * kPointerSize;
SetReturnPosition(literal());
__ LeaveFrame(StackFrame::JAVA_SCRIPT, sp_delta);
__ Ret();
}
}
}
void FullCodeGenerator::RestoreContext() {
__ LoadP(cp, MemOperand(fp, StandardFrameConstants::kContextOffset));
}
void FullCodeGenerator::StackValueContext::Plug(Variable* var) const {
DCHECK(var->IsStackAllocated() || var->IsContextSlot());
codegen()->GetVar(result_register(), var);
codegen()->PushOperand(result_register());
}
void FullCodeGenerator::EffectContext::Plug(Heap::RootListIndex index) const {}
void FullCodeGenerator::AccumulatorValueContext::Plug(
Heap::RootListIndex index) const {
__ LoadRoot(result_register(), index);
}
void FullCodeGenerator::StackValueContext::Plug(
Heap::RootListIndex index) const {
__ LoadRoot(result_register(), index);
codegen()->PushOperand(result_register());
}
void FullCodeGenerator::TestContext::Plug(Heap::RootListIndex index) const {
codegen()->PrepareForBailoutBeforeSplit(condition(), true, true_label_,
false_label_);
if (index == Heap::kUndefinedValueRootIndex ||
index == Heap::kNullValueRootIndex ||
index == Heap::kFalseValueRootIndex) {
if (false_label_ != fall_through_) __ b(false_label_);
} else if (index == Heap::kTrueValueRootIndex) {
if (true_label_ != fall_through_) __ b(true_label_);
} else {
__ LoadRoot(result_register(), index);
codegen()->DoTest(this);
}
}
void FullCodeGenerator::EffectContext::Plug(Handle<Object> lit) const {}
void FullCodeGenerator::AccumulatorValueContext::Plug(
Handle<Object> lit) const {
__ mov(result_register(), Operand(lit));
}
void FullCodeGenerator::StackValueContext::Plug(Handle<Object> lit) const {
// Immediates cannot be pushed directly.
__ mov(result_register(), Operand(lit));
codegen()->PushOperand(result_register());
}
void FullCodeGenerator::TestContext::Plug(Handle<Object> lit) const {
codegen()->PrepareForBailoutBeforeSplit(condition(), true, true_label_,
false_label_);
DCHECK(lit->IsNullOrUndefined(isolate()) || !lit->IsUndetectable());
if (lit->IsNullOrUndefined(isolate()) || lit->IsFalse(isolate())) {
if (false_label_ != fall_through_) __ b(false_label_);
} else if (lit->IsTrue(isolate()) || lit->IsJSObject()) {
if (true_label_ != fall_through_) __ b(true_label_);
} else if (lit->IsString()) {
if (String::cast(*lit)->length() == 0) {
if (false_label_ != fall_through_) __ b(false_label_);
} else {
if (true_label_ != fall_through_) __ b(true_label_);
}
} else if (lit->IsSmi()) {
if (Smi::cast(*lit)->value() == 0) {
if (false_label_ != fall_through_) __ b(false_label_);
} else {
if (true_label_ != fall_through_) __ b(true_label_);
}
} else {
// For simplicity we always test the accumulator register.
__ mov(result_register(), Operand(lit));
codegen()->DoTest(this);
}
}
void FullCodeGenerator::StackValueContext::DropAndPlug(int count,
Register reg) const {
DCHECK(count > 0);
if (count > 1) codegen()->DropOperands(count - 1);
__ StoreP(reg, MemOperand(sp, 0));
}
void FullCodeGenerator::EffectContext::Plug(Label* materialize_true,
Label* materialize_false) const {
DCHECK(materialize_true == materialize_false);
__ bind(materialize_true);
}
void FullCodeGenerator::AccumulatorValueContext::Plug(
Label* materialize_true, Label* materialize_false) const {
Label done;
__ bind(materialize_true);
__ LoadRoot(result_register(), Heap::kTrueValueRootIndex);
__ b(&done, Label::kNear);
__ bind(materialize_false);
__ LoadRoot(result_register(), Heap::kFalseValueRootIndex);
__ bind(&done);
}
void FullCodeGenerator::StackValueContext::Plug(
Label* materialize_true, Label* materialize_false) const {
Label done;
__ bind(materialize_true);
__ LoadRoot(ip, Heap::kTrueValueRootIndex);
__ b(&done, Label::kNear);
__ bind(materialize_false);
__ LoadRoot(ip, Heap::kFalseValueRootIndex);
__ bind(&done);
codegen()->PushOperand(ip);
}
void FullCodeGenerator::TestContext::Plug(Label* materialize_true,
Label* materialize_false) const {
DCHECK(materialize_true == true_label_);
DCHECK(materialize_false == false_label_);
}
void FullCodeGenerator::AccumulatorValueContext::Plug(bool flag) const {
Heap::RootListIndex value_root_index =
flag ? Heap::kTrueValueRootIndex : Heap::kFalseValueRootIndex;
__ LoadRoot(result_register(), value_root_index);
}
void FullCodeGenerator::StackValueContext::Plug(bool flag) const {
Heap::RootListIndex value_root_index =
flag ? Heap::kTrueValueRootIndex : Heap::kFalseValueRootIndex;
__ LoadRoot(ip, value_root_index);
codegen()->PushOperand(ip);
}
void FullCodeGenerator::TestContext::Plug(bool flag) const {
codegen()->PrepareForBailoutBeforeSplit(condition(), true, true_label_,
false_label_);
if (flag) {
if (true_label_ != fall_through_) __ b(true_label_);
} else {
if (false_label_ != fall_through_) __ b(false_label_);
}
}
void FullCodeGenerator::DoTest(Expression* condition, Label* if_true,
Label* if_false, Label* fall_through) {
Handle<Code> ic = ToBooleanICStub::GetUninitialized(isolate());
CallIC(ic, condition->test_id());
__ CompareRoot(result_register(), Heap::kTrueValueRootIndex);
Split(eq, if_true, if_false, fall_through);
}
void FullCodeGenerator::Split(Condition cond, Label* if_true, Label* if_false,
Label* fall_through) {
if (if_false == fall_through) {
__ b(cond, if_true);
} else if (if_true == fall_through) {
__ b(NegateCondition(cond), if_false);
} else {
__ b(cond, if_true);
__ b(if_false);
}
}
MemOperand FullCodeGenerator::StackOperand(Variable* var) {
DCHECK(var->IsStackAllocated());
// Offset is negative because higher indexes are at lower addresses.
int offset = -var->index() * kPointerSize;
// Adjust by a (parameter or local) base offset.
if (var->IsParameter()) {
offset += (info_->scope()->num_parameters() + 1) * kPointerSize;
} else {
offset += JavaScriptFrameConstants::kLocal0Offset;
}
return MemOperand(fp, offset);
}
MemOperand FullCodeGenerator::VarOperand(Variable* var, Register scratch) {
DCHECK(var->IsContextSlot() || var->IsStackAllocated());
if (var->IsContextSlot()) {
int context_chain_length = scope()->ContextChainLength(var->scope());
__ LoadContext(scratch, context_chain_length);
return ContextMemOperand(scratch, var->index());
} else {
return StackOperand(var);
}
}
void FullCodeGenerator::GetVar(Register dest, Variable* var) {
// Use destination as scratch.
MemOperand location = VarOperand(var, dest);
__ LoadP(dest, location, r0);
}
void FullCodeGenerator::SetVar(Variable* var, Register src, Register scratch0,
Register scratch1) {
DCHECK(var->IsContextSlot() || var->IsStackAllocated());
DCHECK(!scratch0.is(src));
DCHECK(!scratch0.is(scratch1));
DCHECK(!scratch1.is(src));
MemOperand location = VarOperand(var, scratch0);
__ StoreP(src, location);
// Emit the write barrier code if the location is in the heap.
if (var->IsContextSlot()) {
__ RecordWriteContextSlot(scratch0, location.offset(), src, scratch1,
kLRHasBeenSaved, kDontSaveFPRegs);
}
}
void FullCodeGenerator::PrepareForBailoutBeforeSplit(Expression* expr,
bool should_normalize,
Label* if_true,
Label* if_false) {
// Only prepare for bailouts before splits if we're in a test
// context. Otherwise, we let the Visit function deal with the
// preparation to avoid preparing with the same AST id twice.
if (!context()->IsTest()) return;
Label skip;
if (should_normalize) __ b(&skip);
PrepareForBailout(expr, BailoutState::TOS_REGISTER);
if (should_normalize) {
__ CompareRoot(r2, Heap::kTrueValueRootIndex);
Split(eq, if_true, if_false, NULL);
__ bind(&skip);
}
}
void FullCodeGenerator::EmitDebugCheckDeclarationContext(Variable* variable) {
// The variable in the declaration always resides in the current function
// context.
DCHECK_EQ(0, scope()->ContextChainLength(variable->scope()));
if (FLAG_debug_code) {
// Check that we're not inside a with or catch context.
__ LoadP(r3, FieldMemOperand(cp, HeapObject::kMapOffset));
__ CompareRoot(r3, Heap::kWithContextMapRootIndex);
__ Check(ne, kDeclarationInWithContext);
__ CompareRoot(r3, Heap::kCatchContextMapRootIndex);
__ Check(ne, kDeclarationInCatchContext);
}
}
void FullCodeGenerator::VisitVariableDeclaration(
VariableDeclaration* declaration) {
VariableProxy* proxy = declaration->proxy();
Variable* variable = proxy->var();
switch (variable->location()) {
case VariableLocation::UNALLOCATED: {
DCHECK(!variable->binding_needs_init());
globals_->Add(variable->name(), zone());
FeedbackSlot slot = proxy->VariableFeedbackSlot();
DCHECK(!slot.IsInvalid());
globals_->Add(handle(Smi::FromInt(slot.ToInt()), isolate()), zone());
globals_->Add(isolate()->factory()->undefined_value(), zone());
globals_->Add(isolate()->factory()->undefined_value(), zone());
break;
}
case VariableLocation::PARAMETER:
case VariableLocation::LOCAL:
if (variable->binding_needs_init()) {
Comment cmnt(masm_, "[ VariableDeclaration");
__ LoadRoot(ip, Heap::kTheHoleValueRootIndex);
__ StoreP(ip, StackOperand(variable));
}
break;
case VariableLocation::CONTEXT:
if (variable->binding_needs_init()) {
Comment cmnt(masm_, "[ VariableDeclaration");
EmitDebugCheckDeclarationContext(variable);
__ LoadRoot(ip, Heap::kTheHoleValueRootIndex);
__ StoreP(ip, ContextMemOperand(cp, variable->index()));
// No write barrier since the_hole_value is in old space.
PrepareForBailoutForId(proxy->id(), BailoutState::NO_REGISTERS);
}
break;
case VariableLocation::LOOKUP:
case VariableLocation::MODULE:
UNREACHABLE();
}
}
void FullCodeGenerator::VisitFunctionDeclaration(
FunctionDeclaration* declaration) {
VariableProxy* proxy = declaration->proxy();
Variable* variable = proxy->var();
switch (variable->location()) {
case VariableLocation::UNALLOCATED: {
globals_->Add(variable->name(), zone());
FeedbackSlot slot = proxy->VariableFeedbackSlot();
DCHECK(!slot.IsInvalid());
globals_->Add(handle(Smi::FromInt(slot.ToInt()), isolate()), zone());
// We need the slot where the literals array lives, too.
slot = declaration->fun()->LiteralFeedbackSlot();
DCHECK(!slot.IsInvalid());
globals_->Add(handle(Smi::FromInt(slot.ToInt()), isolate()), zone());
Handle<SharedFunctionInfo> function =
Compiler::GetSharedFunctionInfo(declaration->fun(), script(), info_);
// Check for stack-overflow exception.
if (function.is_null()) return SetStackOverflow();
globals_->Add(function, zone());
break;
}
case VariableLocation::PARAMETER:
case VariableLocation::LOCAL: {
Comment cmnt(masm_, "[ FunctionDeclaration");
VisitForAccumulatorValue(declaration->fun());
__ StoreP(result_register(), StackOperand(variable));
break;
}
case VariableLocation::CONTEXT: {
Comment cmnt(masm_, "[ FunctionDeclaration");
EmitDebugCheckDeclarationContext(variable);
VisitForAccumulatorValue(declaration->fun());
__ StoreP(result_register(), ContextMemOperand(cp, variable->index()));
int offset = Context::SlotOffset(variable->index());
// We know that we have written a function, which is not a smi.
__ RecordWriteContextSlot(cp, offset, result_register(), r4,
kLRHasBeenSaved, kDontSaveFPRegs,
EMIT_REMEMBERED_SET, OMIT_SMI_CHECK);
PrepareForBailoutForId(proxy->id(), BailoutState::NO_REGISTERS);
break;
}
case VariableLocation::LOOKUP:
case VariableLocation::MODULE:
UNREACHABLE();
}
}
void FullCodeGenerator::DeclareGlobals(Handle<FixedArray> pairs) {
// Call the runtime to declare the globals.
__ mov(r3, Operand(pairs));
__ LoadSmiLiteral(r2, Smi::FromInt(DeclareGlobalsFlags()));
__ EmitLoadFeedbackVector(r4);
__ Push(r3, r2, r4);
__ CallRuntime(Runtime::kDeclareGlobals);
// Return value is ignored.
}
void FullCodeGenerator::VisitSwitchStatement(SwitchStatement* stmt) {
Comment cmnt(masm_, "[ SwitchStatement");
Breakable nested_statement(this, stmt);
SetStatementPosition(stmt);
// Keep the switch value on the stack until a case matches.
VisitForStackValue(stmt->tag());
PrepareForBailoutForId(stmt->EntryId(), BailoutState::NO_REGISTERS);
ZoneList<CaseClause*>* clauses = stmt->cases();
CaseClause* default_clause = NULL; // Can occur anywhere in the list.
Label next_test; // Recycled for each test.
// Compile all the tests with branches to their bodies.
for (int i = 0; i < clauses->length(); i++) {
CaseClause* clause = clauses->at(i);
clause->body_target()->Unuse();
// The default is not a test, but remember it as final fall through.
if (clause->is_default()) {
default_clause = clause;
continue;
}
Comment cmnt(masm_, "[ Case comparison");
__ bind(&next_test);
next_test.Unuse();
// Compile the label expression.
VisitForAccumulatorValue(clause->label());
// Perform the comparison as if via '==='.
__ LoadP(r3, MemOperand(sp, 0)); // Switch value.
bool inline_smi_code = ShouldInlineSmiCase(Token::EQ_STRICT);
JumpPatchSite patch_site(masm_);
if (inline_smi_code) {
Label slow_case;
__ LoadRR(r4, r2);
__ OrP(r4, r3);
patch_site.EmitJumpIfNotSmi(r4, &slow_case);
__ CmpP(r3, r2);
__ bne(&next_test);
__ Drop(1); // Switch value is no longer needed.
__ b(clause->body_target());
__ bind(&slow_case);
}
// Record position before stub call for type feedback.
SetExpressionPosition(clause);
Handle<Code> ic =
CodeFactory::CompareIC(isolate(), Token::EQ_STRICT).code();
CallIC(ic, clause->CompareId());
patch_site.EmitPatchInfo();
Label skip;
__ b(&skip);
PrepareForBailout(clause, BailoutState::TOS_REGISTER);
__ CompareRoot(r2, Heap::kTrueValueRootIndex);
__ bne(&next_test);
__ Drop(1);
__ b(clause->body_target());
__ bind(&skip);
__ CmpP(r2, Operand::Zero());
__ bne(&next_test);
__ Drop(1); // Switch value is no longer needed.
__ b(clause->body_target());
}
// Discard the test value and jump to the default if present, otherwise to
// the end of the statement.
__ bind(&next_test);
DropOperands(1); // Switch value is no longer needed.
if (default_clause == NULL) {
__ b(nested_statement.break_label());
} else {
__ b(default_clause->body_target());
}
// Compile all the case bodies.
for (int i = 0; i < clauses->length(); i++) {
Comment cmnt(masm_, "[ Case body");
CaseClause* clause = clauses->at(i);
__ bind(clause->body_target());
PrepareForBailoutForId(clause->EntryId(), BailoutState::NO_REGISTERS);
VisitStatements(clause->statements());
}
__ bind(nested_statement.break_label());
PrepareForBailoutForId(stmt->ExitId(), BailoutState::NO_REGISTERS);
}
void FullCodeGenerator::VisitForInStatement(ForInStatement* stmt) {
Comment cmnt(masm_, "[ ForInStatement");
SetStatementPosition(stmt, SKIP_BREAK);
FeedbackSlot slot = stmt->ForInFeedbackSlot();
// Get the object to enumerate over.
SetExpressionAsStatementPosition(stmt->enumerable());
VisitForAccumulatorValue(stmt->enumerable());
OperandStackDepthIncrement(5);
Label loop, exit;
Iteration loop_statement(this, stmt);
increment_loop_depth();
// If the object is null or undefined, skip over the loop, otherwise convert
// it to a JS receiver. See ECMA-262 version 5, section 12.6.4.
Label convert, done_convert;
__ JumpIfSmi(r2, &convert);
__ CompareObjectType(r2, r3, r3, FIRST_JS_RECEIVER_TYPE);
__ bge(&done_convert);
__ CompareRoot(r2, Heap::kNullValueRootIndex);
__ beq(&exit);
__ CompareRoot(r2, Heap::kUndefinedValueRootIndex);
__ beq(&exit);
__ bind(&convert);
__ Call(isolate()->builtins()->ToObject(), RelocInfo::CODE_TARGET);
RestoreContext();
__ bind(&done_convert);
PrepareForBailoutForId(stmt->ToObjectId(), BailoutState::TOS_REGISTER);
__ push(r2);
// Check cache validity in generated code. If we cannot guarantee cache
// validity, call the runtime system to check cache validity or get the
// property names in a fixed array. Note: Proxies never have an enum cache,
// so will always take the slow path.
Label call_runtime;
__ CheckEnumCache(&call_runtime);
// The enum cache is valid. Load the map of the object being
// iterated over and use the cache for the iteration.
Label use_cache;
__ LoadP(r2, FieldMemOperand(r2, HeapObject::kMapOffset));
__ b(&use_cache);
// Get the set of properties to enumerate.
__ bind(&call_runtime);
__ push(r2); // Duplicate the enumerable object on the stack.
__ CallRuntime(Runtime::kForInEnumerate);
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
// to do a slow check.
Label fixed_array;
__ LoadP(r4, FieldMemOperand(r2, HeapObject::kMapOffset));
__ CompareRoot(r4, Heap::kMetaMapRootIndex);
__ bne(&fixed_array);
// We got a map in register r2. Get the enumeration cache from it.
Label no_descriptors;
__ bind(&use_cache);
__ EnumLength(r3, r2);
__ CmpSmiLiteral(r3, Smi::kZero, r0);
__ beq(&no_descriptors, Label::kNear);
__ LoadInstanceDescriptors(r2, r4);
__ LoadP(r4, FieldMemOperand(r4, DescriptorArray::kEnumCacheOffset));
__ LoadP(r4,
FieldMemOperand(r4, DescriptorArray::kEnumCacheBridgeCacheOffset));
// Set up the four remaining stack slots.
__ push(r2); // Map.
__ LoadSmiLiteral(r2, Smi::kZero);
// Push enumeration cache, enumeration cache length (as smi) and zero.
__ Push(r4, r3, r2);
__ b(&loop);
__ bind(&no_descriptors);
__ Drop(1);
__ b(&exit);
// We got a fixed array in register r2. Iterate through that.
__ bind(&fixed_array);
__ LoadSmiLiteral(r3, Smi::FromInt(1)); // Smi(1) indicates slow check
__ Push(r3, r2); // Smi and array
__ LoadP(r3, FieldMemOperand(r2, FixedArray::kLengthOffset));
__ Push(r3); // Fixed array length (as smi).
PrepareForBailoutForId(stmt->PrepareId(), BailoutState::NO_REGISTERS);
__ LoadSmiLiteral(r2, Smi::kZero);
__ Push(r2); // Initial index.
// Generate code for doing the condition check.
__ bind(&loop);
SetExpressionAsStatementPosition(stmt->each());
// Load the current count to r2, load the length to r3.
__ LoadP(r2, MemOperand(sp, 0 * kPointerSize));
__ LoadP(r3, MemOperand(sp, 1 * kPointerSize));
__ CmpLogicalP(r2, r3); // Compare to the array length.
__ bge(loop_statement.break_label());
// Get the current entry of the array into register r5.
__ LoadP(r4, MemOperand(sp, 2 * kPointerSize));
__ AddP(r4, Operand(FixedArray::kHeaderSize - kHeapObjectTag));
__ SmiToPtrArrayOffset(r5, r2);
__ LoadP(r5, MemOperand(r5, r4));
// Get the expected map from the stack or a smi in the
// permanent slow case into register r4.
__ LoadP(r4, MemOperand(sp, 3 * kPointerSize));
// Check if the expected map still matches that of the enumerable.
// If not, we may have to filter the key.
Label update_each;
__ LoadP(r3, MemOperand(sp, 4 * kPointerSize));
__ LoadP(r6, FieldMemOperand(r3, HeapObject::kMapOffset));
__ CmpP(r6, r4);
__ beq(&update_each);
// We need to filter the key, record slow-path here.
int const vector_index = SmiFromSlot(slot)->value();
__ EmitLoadFeedbackVector(r2);
__ mov(r4, Operand(FeedbackVector::MegamorphicSentinel(isolate())));
__ StoreP(
r4, FieldMemOperand(r2, FixedArray::OffsetOfElementAt(vector_index)), r0);
// Convert the entry to a string or (smi) 0 if it isn't a property
// any more. If the property has been removed while iterating, we
// just skip it.
__ Push(r3, r5); // Enumerable and current entry.
__ CallRuntime(Runtime::kForInFilter);
PrepareForBailoutForId(stmt->FilterId(), BailoutState::TOS_REGISTER);
__ LoadRR(r5, r2);
__ LoadRoot(r0, Heap::kUndefinedValueRootIndex);
__ CmpP(r2, r0);
__ beq(loop_statement.continue_label());
// Update the 'each' property or variable from the possibly filtered
// entry in register r5.
__ bind(&update_each);
__ LoadRR(result_register(), r5);
// Perform the assignment as if via '='.
{
EffectContext context(this);
EmitAssignment(stmt->each(), stmt->EachFeedbackSlot());
PrepareForBailoutForId(stmt->AssignmentId(), BailoutState::NO_REGISTERS);
}
// Both Crankshaft and Turbofan expect BodyId to be right before stmt->body().
PrepareForBailoutForId(stmt->BodyId(), BailoutState::NO_REGISTERS);
// Generate code for the body of the loop.
Visit(stmt->body());
// Generate code for the going to the next element by incrementing
// the index (smi) stored on top of the stack.
__ bind(loop_statement.continue_label());
PrepareForBailoutForId(stmt->IncrementId(), BailoutState::NO_REGISTERS);
__ pop(r2);
__ AddSmiLiteral(r2, r2, Smi::FromInt(1), r0);
__ push(r2);
EmitBackEdgeBookkeeping(stmt, &loop);
__ b(&loop);
// Remove the pointers stored on the stack.
__ bind(loop_statement.break_label());
DropOperands(5);
// Exit and decrement the loop depth.
PrepareForBailoutForId(stmt->ExitId(), BailoutState::NO_REGISTERS);
__ bind(&exit);
decrement_loop_depth();
}
void FullCodeGenerator::EmitSetHomeObject(Expression* initializer, int offset,
FeedbackSlot slot) {
DCHECK(NeedsHomeObject(initializer));
__ LoadP(StoreDescriptor::ReceiverRegister(), MemOperand(sp));
__ LoadP(StoreDescriptor::ValueRegister(),
MemOperand(sp, offset * kPointerSize));
CallStoreIC(slot, isolate()->factory()->home_object_symbol());
}
void FullCodeGenerator::EmitSetHomeObjectAccumulator(Expression* initializer,
int offset,
FeedbackSlot slot) {
DCHECK(NeedsHomeObject(initializer));
__ Move(StoreDescriptor::ReceiverRegister(), r2);
__ LoadP(StoreDescriptor::ValueRegister(),
MemOperand(sp, offset * kPointerSize));
CallStoreIC(slot, isolate()->factory()->home_object_symbol());
}
void FullCodeGenerator::EmitVariableLoad(VariableProxy* proxy,
TypeofMode typeof_mode) {
// Record position before possible IC call.
SetExpressionPosition(proxy);
PrepareForBailoutForId(proxy->BeforeId(), BailoutState::NO_REGISTERS);
Variable* var = proxy->var();
// Two cases: global variables and all other types of variables.
switch (var->location()) {
case VariableLocation::UNALLOCATED: {
Comment cmnt(masm_, "[ Global variable");
EmitGlobalVariableLoad(proxy, typeof_mode);
context()->Plug(r2);
break;
}
case VariableLocation::PARAMETER:
case VariableLocation::LOCAL:
case VariableLocation::CONTEXT: {
DCHECK_EQ(NOT_INSIDE_TYPEOF, typeof_mode);
Comment cmnt(masm_, var->IsContextSlot() ? "[ Context variable"
: "[ Stack variable");
if (proxy->hole_check_mode() == HoleCheckMode::kRequired) {
// Throw a reference error when using an uninitialized let/const
// binding in harmony mode.
Label done;
GetVar(r2, var);
__ CompareRoot(r2, Heap::kTheHoleValueRootIndex);
__ bne(&done);
__ mov(r2, Operand(var->name()));
__ push(r2);
__ CallRuntime(Runtime::kThrowReferenceError);
__ bind(&done);
context()->Plug(r2);
break;
}
context()->Plug(var);
break;
}
case VariableLocation::LOOKUP:
case VariableLocation::MODULE:
UNREACHABLE();
}
}
void FullCodeGenerator::EmitAccessor(ObjectLiteralProperty* property) {
Expression* expression = (property == NULL) ? NULL : property->value();
if (expression == NULL) {
__ LoadRoot(r3, Heap::kNullValueRootIndex);
PushOperand(r3);
} else {
VisitForStackValue(expression);
if (NeedsHomeObject(expression)) {
DCHECK(property->kind() == ObjectLiteral::Property::GETTER ||
property->kind() == ObjectLiteral::Property::SETTER);
int offset = property->kind() == ObjectLiteral::Property::GETTER ? 2 : 3;
EmitSetHomeObject(expression, offset, property->GetSlot());
}
}
}
void FullCodeGenerator::VisitObjectLiteral(ObjectLiteral* expr) {
Comment cmnt(masm_, "[ ObjectLiteral");
Handle<BoilerplateDescription> constant_properties =
expr->GetOrBuildConstantProperties(isolate());
__ LoadP(r5, MemOperand(fp, JavaScriptFrameConstants::kFunctionOffset));
__ LoadSmiLiteral(r4, SmiFromSlot(expr->literal_slot()));
__ mov(r3, Operand(constant_properties));
int flags = expr->ComputeFlags();
__ LoadSmiLiteral(r2, Smi::FromInt(flags));
if (MustCreateObjectLiteralWithRuntime(expr)) {
__ Push(r5, r4, r3, r2);
__ CallRuntime(Runtime::kCreateObjectLiteral);
} else {
Callable callable = CodeFactory::FastCloneShallowObject(
isolate(), expr->properties_count());
__ Call(callable.code(), RelocInfo::CODE_TARGET);
RestoreContext();
}
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 r2.
bool result_saved = false;
AccessorTable accessor_table(zone());
for (int i = 0; i < expr->properties()->length(); i++) {
ObjectLiteral::Property* property = expr->properties()->at(i);
DCHECK(!property->is_computed_name());
if (property->IsCompileTimeValue()) continue;
Literal* key = property->key()->AsLiteral();
Expression* value = property->value();
if (!result_saved) {
PushOperand(r2); // Save result on stack
result_saved = true;
}
switch (property->kind()) {
case ObjectLiteral::Property::SPREAD:
case ObjectLiteral::Property::CONSTANT:
UNREACHABLE();
case ObjectLiteral::Property::MATERIALIZED_LITERAL:
DCHECK(!CompileTimeValue::IsCompileTimeValue(property->value()));
// Fall through.
case ObjectLiteral::Property::COMPUTED:
// It is safe to use [[Put]] here because the boilerplate already
// contains computed properties with an uninitialized value.
if (key->IsStringLiteral()) {
DCHECK(key->IsPropertyName());
if (property->emit_store()) {
VisitForAccumulatorValue(value);
DCHECK(StoreDescriptor::ValueRegister().is(r2));
__ LoadP(StoreDescriptor::ReceiverRegister(), MemOperand(sp));
CallStoreIC(property->GetSlot(0), key->value());
PrepareForBailoutForId(key->id(), BailoutState::NO_REGISTERS);
if (NeedsHomeObject(value)) {
EmitSetHomeObjectAccumulator(value, 0, property->GetSlot(1));
}
} else {
VisitForEffect(value);
}
break;
}
// Duplicate receiver on stack.
__ LoadP(r2, MemOperand(sp));
PushOperand(r2);
VisitForStackValue(key);
VisitForStackValue(value);
if (property->emit_store()) {
if (NeedsHomeObject(value)) {
EmitSetHomeObject(value, 2, property->GetSlot());
}
__ LoadSmiLiteral(r2, Smi::FromInt(SLOPPY)); // PropertyAttributes
PushOperand(r2);
CallRuntimeWithOperands(Runtime::kSetProperty);
} else {
DropOperands(3);
}
break;
case ObjectLiteral::Property::PROTOTYPE:
// Duplicate receiver on stack.
__ LoadP(r2, MemOperand(sp));
PushOperand(r2);
VisitForStackValue(value);
DCHECK(property->emit_store());
CallRuntimeWithOperands(Runtime::kInternalSetPrototype);
PrepareForBailoutForId(expr->GetIdForPropertySet(i),
BailoutState::NO_REGISTERS);
break;
case ObjectLiteral::Property::GETTER:
if (property->emit_store()) {
AccessorTable::Iterator it = accessor_table.lookup(key);
it->second->bailout_id = expr->GetIdForPropertySet(i);
it->second->getter = property;
}
break;
case ObjectLiteral::Property::SETTER:
if (property->emit_store()) {
AccessorTable::Iterator it = accessor_table.lookup(key);
it->second->bailout_id = expr->GetIdForPropertySet(i);
it->second->setter = property;
}
break;
}
}
// Emit code to define accessors, using only a single call to the runtime for
// each pair of corresponding getters and setters.
for (AccessorTable::Iterator it = accessor_table.begin();
it != accessor_table.end(); ++it) {
__ LoadP(r2, MemOperand(sp)); // Duplicate receiver.
PushOperand(r2);
VisitForStackValue(it->first);
EmitAccessor(it->second->getter);
EmitAccessor(it->second->setter);
__ LoadSmiLiteral(r2, Smi::FromInt(NONE));
PushOperand(r2);
CallRuntimeWithOperands(Runtime::kDefineAccessorPropertyUnchecked);
PrepareForBailoutForId(it->second->bailout_id, BailoutState::NO_REGISTERS);
}
if (result_saved) {
context()->PlugTOS();
} else {
context()->Plug(r2);
}
}
void FullCodeGenerator::VisitArrayLiteral(ArrayLiteral* expr) {
Comment cmnt(masm_, "[ ArrayLiteral");
Handle<ConstantElementsPair> constant_elements =
expr->GetOrBuildConstantElements(isolate());
bool has_fast_elements =
IsFastObjectElementsKind(expr->constant_elements_kind());
AllocationSiteMode allocation_site_mode = TRACK_ALLOCATION_SITE;
if (has_fast_elements && !FLAG_allocation_site_pretenuring) {
// If the only customer of allocation sites is transitioning, then
// we can turn it off if we don't have anywhere else to transition to.
allocation_site_mode = DONT_TRACK_ALLOCATION_SITE;
}
__ LoadP(r5, MemOperand(fp, JavaScriptFrameConstants::kFunctionOffset));
__ LoadSmiLiteral(r4, SmiFromSlot(expr->literal_slot()));
__ mov(r3, Operand(constant_elements));
if (MustCreateArrayLiteralWithRuntime(expr)) {
__ LoadSmiLiteral(r2, Smi::FromInt(expr->ComputeFlags()));
__ Push(r5, r4, r3, r2);
__ CallRuntime(Runtime::kCreateArrayLiteral);
} else {
Callable callable =
CodeFactory::FastCloneShallowArray(isolate(), allocation_site_mode);
__ Call(callable.code(), RelocInfo::CODE_TARGET);
RestoreContext();
}
PrepareForBailoutForId(expr->CreateLiteralId(), BailoutState::TOS_REGISTER);
bool result_saved = false; // Is the result saved to the stack?
ZoneList<Expression*>* subexprs = expr->values();
int length = subexprs->length();
// Emit code to evaluate all the non-constant subexpressions and to store
// them into the newly cloned array.
for (int array_index = 0; array_index < length; array_index++) {
Expression* subexpr = subexprs->at(array_index);
DCHECK(!subexpr->IsSpread());
// If the subexpression is a literal or a simple materialized literal it
// is already set in the cloned array.
if (CompileTimeValue::IsCompileTimeValue(subexpr)) continue;
if (!result_saved) {
PushOperand(r2);
result_saved = true;
}
VisitForAccumulatorValue(subexpr);
__ LoadSmiLiteral(StoreDescriptor::NameRegister(),
Smi::FromInt(array_index));
__ LoadP(StoreDescriptor::ReceiverRegister(), MemOperand(sp, 0));
CallKeyedStoreIC(expr->LiteralFeedbackSlot());
PrepareForBailoutForId(expr->GetIdForElement(array_index),
BailoutState::NO_REGISTERS);
}
if (result_saved) {
context()->PlugTOS();
} else {
context()->Plug(r2);
}
}
void FullCodeGenerator::VisitAssignment(Assignment* expr) {
DCHECK(expr->target()->IsValidReferenceExpressionOrThis());
Comment cmnt(masm_, "[ Assignment");
Property* property = expr->target()->AsProperty();
LhsKind assign_type = Property::GetAssignType(property);
// Evaluate LHS expression.
switch (assign_type) {
case VARIABLE:
// Nothing to do here.
break;
case NAMED_PROPERTY:
if (expr->is_compound()) {
// We need the receiver both on the stack and in the register.
VisitForStackValue(property->obj());
__ LoadP(LoadDescriptor::ReceiverRegister(), MemOperand(sp, 0));
} else {
VisitForStackValue(property->obj());
}
break;
case KEYED_PROPERTY:
if (expr->is_compound()) {
VisitForStackValue(property->obj());
VisitForStackValue(property->key());
__ LoadP(LoadDescriptor::ReceiverRegister(),
MemOperand(sp, 1 * kPointerSize));
__ LoadP(LoadDescriptor::NameRegister(), MemOperand(sp, 0));
} else {
VisitForStackValue(property->obj());
VisitForStackValue(property->key());
}
break;
case NAMED_SUPER_PROPERTY:
case KEYED_SUPER_PROPERTY:
UNREACHABLE();
break;
}
// For compound assignments we need another deoptimization point after the
// variable/property load.
if (expr->is_compound()) {
{
AccumulatorValueContext context(this);
switch (assign_type) {
case VARIABLE:
EmitVariableLoad(expr->target()->AsVariableProxy());
PrepareForBailout(expr->target(), BailoutState::TOS_REGISTER);
break;
case NAMED_PROPERTY:
EmitNamedPropertyLoad(property);
PrepareForBailoutForId(property->LoadId(),
BailoutState::TOS_REGISTER);
break;
case KEYED_PROPERTY:
EmitKeyedPropertyLoad(property);
PrepareForBailoutForId(property->LoadId(),
BailoutState::TOS_REGISTER);
break;
case NAMED_SUPER_PROPERTY:
case KEYED_SUPER_PROPERTY:
UNREACHABLE();
break;
}
}
Token::Value op = expr->binary_op();
PushOperand(r2); // Left operand goes on the stack.
VisitForAccumulatorValue(expr->value());
AccumulatorValueContext context(this);
if (ShouldInlineSmiCase(op)) {
EmitInlineSmiBinaryOp(expr->binary_operation(), op, expr->target(),
expr->value());
} else {
EmitBinaryOp(expr->binary_operation(), op);
}
// Deoptimization point in case the binary operation may have side effects.
PrepareForBailout(expr->binary_operation(), BailoutState::TOS_REGISTER);
} else {
VisitForAccumulatorValue(expr->value());
}
SetExpressionPosition(expr);
// Store the value.
switch (assign_type) {
case VARIABLE: {
VariableProxy* proxy = expr->target()->AsVariableProxy();
EmitVariableAssignment(proxy->var(), expr->op(), expr->AssignmentSlot(),
proxy->hole_check_mode());
PrepareForBailoutForId(expr->AssignmentId(), BailoutState::TOS_REGISTER);
context()->Plug(r2);
break;
}
case NAMED_PROPERTY:
EmitNamedPropertyAssignment(expr);
break;
case KEYED_PROPERTY:
EmitKeyedPropertyAssignment(expr);
break;
case NAMED_SUPER_PROPERTY:
case KEYED_SUPER_PROPERTY:
UNREACHABLE();
break;
}
}
void FullCodeGenerator::VisitYield(Yield* expr) {
// Resumable functions are not supported.
UNREACHABLE();
}
void FullCodeGenerator::PushOperands(Register reg1, Register reg2) {
OperandStackDepthIncrement(2);
__ Push(reg1, reg2);
}
void FullCodeGenerator::PushOperands(Register reg1, Register reg2,
Register reg3) {
OperandStackDepthIncrement(3);
__ Push(reg1, reg2, reg3);
}
void FullCodeGenerator::PushOperands(Register reg1, Register reg2,
Register reg3, Register reg4) {
OperandStackDepthIncrement(4);
__ Push(reg1, reg2, reg3, reg4);
}
void FullCodeGenerator::PopOperands(Register reg1, Register reg2) {
OperandStackDepthDecrement(2);
__ Pop(reg1, reg2);
}
void FullCodeGenerator::EmitOperandStackDepthCheck() {
if (FLAG_debug_code) {
int expected_diff = StandardFrameConstants::kFixedFrameSizeFromFp +
operand_stack_depth_ * kPointerSize;
__ SubP(r2, fp, sp);
__ CmpP(r2, Operand(expected_diff));
__ Assert(eq, kUnexpectedStackDepth);
}
}
void FullCodeGenerator::EmitCreateIteratorResult(bool done) {
Label allocate, done_allocate;
__ Allocate(JSIteratorResult::kSize, r2, r4, r5, &allocate,
NO_ALLOCATION_FLAGS);
__ b(&done_allocate);
__ bind(&allocate);
__ Push(Smi::FromInt(JSIteratorResult::kSize));
__ CallRuntime(Runtime::kAllocateInNewSpace);
__ bind(&done_allocate);
__ LoadNativeContextSlot(Context::ITERATOR_RESULT_MAP_INDEX, r3);
PopOperand(r4);
__ LoadRoot(r5,
done ? Heap::kTrueValueRootIndex : Heap::kFalseValueRootIndex);
__ LoadRoot(r6, Heap::kEmptyFixedArrayRootIndex);
__ StoreP(r3, FieldMemOperand(r2, HeapObject::kMapOffset), r0);
__ StoreP(r6, FieldMemOperand(r2, JSObject::kPropertiesOffset), r0);
__ StoreP(r6, FieldMemOperand(r2, JSObject::kElementsOffset), r0);
__ StoreP(r4, FieldMemOperand(r2, JSIteratorResult::kValueOffset), r0);
__ StoreP(r5, FieldMemOperand(r2, JSIteratorResult::kDoneOffset), r0);
}
void FullCodeGenerator::EmitInlineSmiBinaryOp(BinaryOperation* expr,
Token::Value op,
Expression* left_expr,
Expression* right_expr) {
Label done, smi_case, stub_call;
Register scratch1 = r4;
Register scratch2 = r5;
// Get the arguments.
Register left = r3;
Register right = r2;
PopOperand(left);
// Perform combined smi check on both operands.
__ LoadRR(scratch1, right);
__ OrP(scratch1, left);
STATIC_ASSERT(kSmiTag == 0);
JumpPatchSite patch_site(masm_);
patch_site.EmitJumpIfSmi(scratch1, &smi_case);
__ bind(&stub_call);
Handle<Code> code = CodeFactory::BinaryOpIC(isolate(), op).code();
CallIC(code, expr->BinaryOperationFeedbackId());
patch_site.EmitPatchInfo();
__ b(&done);
__ bind(&smi_case);
// Smi case. This code works the same way as the smi-smi case in the type
// recording binary operation stub.
switch (op) {
case Token::SAR:
__ GetLeastBitsFromSmi(scratch1, right, 5);
__ ShiftRightArithP(right, left, scratch1);
__ ClearRightImm(right, right, Operand(kSmiTagSize + kSmiShiftSize));
break;
case Token::SHL: {
__ GetLeastBitsFromSmi(scratch2, right, 5);
#if V8_TARGET_ARCH_S390X
__ ShiftLeftP(right, left, scratch2);
#else
__ SmiUntag(scratch1, left);
__ ShiftLeftP(scratch1, scratch1, scratch2);
// Check that the *signed* result fits in a smi
__ JumpIfNotSmiCandidate(scratch1, scratch2, &stub_call);
__ SmiTag(right, scratch1);
#endif
break;
}
case Token::SHR: {
__ SmiUntag(scratch1, left);
__ GetLeastBitsFromSmi(scratch2, right, 5);
__ srl(scratch1, scratch2);
// Unsigned shift is not allowed to produce a negative number.
__ JumpIfNotUnsignedSmiCandidate(scratch1, r0, &stub_call);
__ SmiTag(right, scratch1);
break;
}
case Token::ADD: {
__ AddP(scratch1, left, right);
__ b(overflow, &stub_call);
__ LoadRR(right, scratch1);
break;
}
case Token::SUB: {
__ SubP(scratch1, left, right);
__ b(overflow, &stub_call);
__ LoadRR(right, scratch1);
break;
}
case Token::MUL: {
Label mul_zero;
#if V8_TARGET_ARCH_S390X
// Remove tag from both operands.
__ SmiUntag(ip, right);
__ SmiUntag(scratch2, left);
__ mr_z(scratch1, ip);
// Check for overflowing the smi range - no overflow if higher 33 bits of
// the result are identical.
__ lr(ip, scratch2); // 32 bit load
__ sra(ip, Operand(31));
__ cr_z(ip, scratch1); // 32 bit compare
__ bne(&stub_call);
#else
__ SmiUntag(ip, right);
__ LoadRR(scratch2, left); // load into low order of reg pair
__ mr_z(scratch1, ip); // R4:R5 = R5 * ip
// Check for overflowing the smi range - no overflow if higher 33 bits of
// the result are identical.
__ TestIfInt32(scratch1, scratch2, ip);
__ bne(&stub_call);
#endif
// Go slow on zero result to handle -0.
__ chi(scratch2, Operand::Zero());
__ beq(&mul_zero, Label::kNear);
#if V8_TARGET_ARCH_S390X
__ SmiTag(right, scratch2);
#else
__ LoadRR(right, scratch2);
#endif
__ b(&done);
// We need -0 if we were multiplying a negative number with 0 to get 0.
// We know one of them was zero.
__ bind(&mul_zero);
__ AddP(scratch2, right, left);
__ CmpP(scratch2, Operand::Zero());
__ blt(&stub_call);
__ LoadSmiLiteral(right, Smi::kZero);
break;
}
case Token::BIT_OR:
__ OrP(right, left);
break;
case Token::BIT_AND:
__ AndP(right, left);
break;
case Token::BIT_XOR:
__ XorP(right, left);
break;
default:
UNREACHABLE();
}
__ bind(&done);
context()->Plug(r2);
}
void FullCodeGenerator::EmitBinaryOp(BinaryOperation* expr, Token::Value op) {
PopOperand(r3);
Handle<Code> code = CodeFactory::BinaryOpIC(isolate(), op).code();
JumpPatchSite patch_site(masm_); // unbound, signals no inlined smi code.
CallIC(code, expr->BinaryOperationFeedbackId());
patch_site.EmitPatchInfo();
context()->Plug(r2);
}
void FullCodeGenerator::EmitAssignment(Expression* expr, FeedbackSlot slot) {
DCHECK(expr->IsValidReferenceExpressionOrThis());
Property* prop = expr->AsProperty();
LhsKind assign_type = Property::GetAssignType(prop);
switch (assign_type) {
case VARIABLE: {
VariableProxy* proxy = expr->AsVariableProxy();
EffectContext context(this);
EmitVariableAssignment(proxy->var(), Token::ASSIGN, slot,
proxy->hole_check_mode());
break;
}
case NAMED_PROPERTY: {
PushOperand(r2); // Preserve value.
VisitForAccumulatorValue(prop->obj());
__ Move(StoreDescriptor::ReceiverRegister(), r2);
PopOperand(StoreDescriptor::ValueRegister()); // Restore value.
CallStoreIC(slot, prop->key()->AsLiteral()->value());
break;
}
case KEYED_PROPERTY: {
PushOperand(r2); // Preserve value.
VisitForStackValue(prop->obj());
VisitForAccumulatorValue(prop->key());
__ Move(StoreDescriptor::NameRegister(), r2);
PopOperands(StoreDescriptor::ValueRegister(),
StoreDescriptor::ReceiverRegister());
CallKeyedStoreIC(slot);
break;
}
case NAMED_SUPER_PROPERTY:
case KEYED_SUPER_PROPERTY:
UNREACHABLE();
break;
}
context()->Plug(r2);
}
void FullCodeGenerator::EmitStoreToStackLocalOrContextSlot(
Variable* var, MemOperand location) {
__ StoreP(result_register(), location);
if (var->IsContextSlot()) {
// RecordWrite may destroy all its register arguments.
__ LoadRR(r5, result_register());
int offset = Context::SlotOffset(var->index());
__ RecordWriteContextSlot(r3, offset, r5, r4, kLRHasBeenSaved,
kDontSaveFPRegs);
}
}
void FullCodeGenerator::EmitVariableAssignment(Variable* var, Token::Value op,
FeedbackSlot slot,
HoleCheckMode hole_check_mode) {
if (var->IsUnallocated()) {
// Global var, const, or let.
__ LoadGlobalObject(StoreDescriptor::ReceiverRegister());
CallStoreIC(slot, var->name());
} else if (IsLexicalVariableMode(var->mode()) && op != Token::INIT) {
// Non-initializing assignment to let variable needs a write barrier.
DCHECK(!var->IsLookupSlot());
DCHECK(var->IsStackAllocated() || var->IsContextSlot());
MemOperand location = VarOperand(var, r3);
// Perform an initialization check for lexically declared variables.
if (hole_check_mode == HoleCheckMode::kRequired) {
Label assign;
__ LoadP(r5, location);
__ CompareRoot(r5, Heap::kTheHoleValueRootIndex);
__ bne(&assign);
__ mov(r5, Operand(var->name()));
__ push(r5);
__ CallRuntime(Runtime::kThrowReferenceError);
__ bind(&assign);
}
if (var->mode() != CONST) {
EmitStoreToStackLocalOrContextSlot(var, location);
} else if (var->throw_on_const_assignment(language_mode())) {
__ CallRuntime(Runtime::kThrowConstAssignError);
}
} else if (var->is_this() && var->mode() == CONST && op == Token::INIT) {
// Initializing assignment to const {this} needs a write barrier.
DCHECK(var->IsStackAllocated() || var->IsContextSlot());
Label uninitialized_this;
MemOperand location = VarOperand(var, r3);
__ LoadP(r5, location);
__ CompareRoot(r5, Heap::kTheHoleValueRootIndex);
__ beq(&uninitialized_this);
__ mov(r3, Operand(var->name()));
__ push(r3);
__ CallRuntime(Runtime::kThrowReferenceError);
__ bind(&uninitialized_this);
EmitStoreToStackLocalOrContextSlot(var, location);
} else {
DCHECK(var->mode() != CONST || op == Token::INIT);
DCHECK((var->IsStackAllocated() || var->IsContextSlot()));
DCHECK(!var->IsLookupSlot());
// Assignment to var or initializing assignment to let/const in harmony
// mode.
MemOperand location = VarOperand(var, r3);
if (FLAG_debug_code && var->mode() == LET && op == Token::INIT) {
// Check for an uninitialized let binding.
__ LoadP(r4, location);
__ CompareRoot(r4, Heap::kTheHoleValueRootIndex);
__ Check(eq, kLetBindingReInitialization);
}
EmitStoreToStackLocalOrContextSlot(var, location);
}
}
void FullCodeGenerator::EmitNamedPropertyAssignment(Assignment* expr) {
// Assignment to a property, using a named store IC.
Property* prop = expr->target()->AsProperty();
DCHECK(prop != NULL);
DCHECK(prop->key()->IsLiteral());
PopOperand(StoreDescriptor::ReceiverRegister());
CallStoreIC(expr->AssignmentSlot(), prop->key()->AsLiteral()->value());
PrepareForBailoutForId(expr->AssignmentId(), BailoutState::TOS_REGISTER);
context()->Plug(r2);
}
void FullCodeGenerator::EmitKeyedPropertyAssignment(Assignment* expr) {
// Assignment to a property, using a keyed store IC.
PopOperands(StoreDescriptor::ReceiverRegister(),
StoreDescriptor::NameRegister());
DCHECK(StoreDescriptor::ValueRegister().is(r2));
CallKeyedStoreIC(expr->AssignmentSlot());
PrepareForBailoutForId(expr->AssignmentId(), BailoutState::TOS_REGISTER);
context()->Plug(r2);
}
// Code common for calls using the IC.
void FullCodeGenerator::EmitCallWithLoadIC(Call* expr) {
Expression* callee = expr->expression();
// Get the target function.
ConvertReceiverMode convert_mode;
if (callee->IsVariableProxy()) {
{
StackValueContext context(this);
EmitVariableLoad(callee->AsVariableProxy());
PrepareForBailout(callee, BailoutState::NO_REGISTERS);
}
// Push undefined as receiver. This is patched in the method prologue if it
// is a sloppy mode method.
__ LoadRoot(r1, Heap::kUndefinedValueRootIndex);
PushOperand(r1);
convert_mode = ConvertReceiverMode::kNullOrUndefined;
} else {
// Load the function from the receiver.
DCHECK(callee->IsProperty());
DCHECK(!callee->AsProperty()->IsSuperAccess());
__ LoadP(LoadDescriptor::ReceiverRegister(), MemOperand(sp, 0));
EmitNamedPropertyLoad(callee->AsProperty());
PrepareForBailoutForId(callee->AsProperty()->LoadId(),
BailoutState::TOS_REGISTER);
// Push the target function under the receiver.
__ LoadP(r1, MemOperand(sp, 0));
PushOperand(r1);
__ StoreP(r2, MemOperand(sp, kPointerSize));
convert_mode = ConvertReceiverMode::kNotNullOrUndefined;
}
EmitCall(expr, convert_mode);
}
// Code common for calls using the IC.
void FullCodeGenerator::EmitKeyedCallWithLoadIC(Call* expr, Expression* key) {
// Load the key.
VisitForAccumulatorValue(key);
Expression* callee = expr->expression();
// Load the function from the receiver.
DCHECK(callee->IsProperty());
__ LoadP(LoadDescriptor::ReceiverRegister(), MemOperand(sp, 0));
__ Move(LoadDescriptor::NameRegister(), r2);
EmitKeyedPropertyLoad(callee->AsProperty());
PrepareForBailoutForId(callee->AsProperty()->LoadId(),
BailoutState::TOS_REGISTER);
// Push the target function under the receiver.
__ LoadP(ip, MemOperand(sp, 0));
PushOperand(ip);
__ StoreP(r2, MemOperand(sp, kPointerSize));
EmitCall(expr, ConvertReceiverMode::kNotNullOrUndefined);
}
void FullCodeGenerator::EmitCall(Call* expr, ConvertReceiverMode mode) {
// Load the arguments.
ZoneList<Expression*>* args = expr->arguments();
int arg_count = args->length();
for (int i = 0; i < arg_count; i++) {
VisitForStackValue(args->at(i));
}
PrepareForBailoutForId(expr->CallId(), BailoutState::NO_REGISTERS);
SetCallPosition(expr, expr->tail_call_mode());
if (expr->tail_call_mode() == TailCallMode::kAllow) {
if (FLAG_trace) {
__ CallRuntime(Runtime::kTraceTailCall);
}
// Update profiling counters before the tail call since we will
// not return to this function.
EmitProfilingCounterHandlingForReturnSequence(true);
}
Handle<Code> code =
CodeFactory::CallICTrampoline(isolate(), mode, expr->tail_call_mode())
.code();
__ Load(r5, Operand(IntFromSlot(expr->CallFeedbackICSlot())));
__ LoadP(r3, MemOperand(sp, (arg_count + 1) * kPointerSize), r0);
__ mov(r2, Operand(arg_count));
CallIC(code);
OperandStackDepthDecrement(arg_count + 1);
RecordJSReturnSite(expr);
RestoreContext();
context()->DropAndPlug(1, r2);
}
void FullCodeGenerator::VisitCallNew(CallNew* expr) {
Comment cmnt(masm_, "[ CallNew");
// According to ECMA-262, section 11.2.2, page 44, the function
// expression in new calls must be evaluated before the
// arguments.
// Push constructor on the stack. If it's not a function it's used as
// receiver for CALL_NON_FUNCTION, otherwise the value on the stack is
// ignored.
DCHECK(!expr->expression()->IsSuperPropertyReference());
VisitForStackValue(expr->expression());
// Push the arguments ("left-to-right") on the stack.
ZoneList<Expression*>* args = expr->arguments();
int arg_count = args->length();
for (int i = 0; i < arg_count; i++) {
VisitForStackValue(args->at(i));
}
// Call the construct call builtin that handles allocation and
// constructor invocation.
SetConstructCallPosition(expr);
// Load function and argument count into r3 and r2.
__ mov(r2, Operand(arg_count));
__ LoadP(r3, MemOperand(sp, arg_count * kPointerSize), r0);
// Record call targets in unoptimized code.
__ EmitLoadFeedbackVector(r4);
__ LoadSmiLiteral(r5, SmiFromSlot(expr->CallNewFeedbackSlot()));
CallConstructStub stub(isolate());
CallIC(stub.GetCode());
OperandStackDepthDecrement(arg_count + 1);
PrepareForBailoutForId(expr->ReturnId(), BailoutState::TOS_REGISTER);
RestoreContext();
context()->Plug(r2);
}
void FullCodeGenerator::EmitIsSmi(CallRuntime* expr) {
ZoneList<Expression*>* args = expr->arguments();
DCHECK(args->length() == 1);
VisitForAccumulatorValue(args->at(0));
Label materialize_true, materialize_false, skip_lookup;
Label* if_true = NULL;
Label* if_false = NULL;
Label* fall_through = NULL;
context()->PrepareTest(&materialize_true, &materialize_false, &if_true,
&if_false, &fall_through);
PrepareForBailoutBeforeSplit(expr, true, if_true, if_false);
__ TestIfSmi(r2);
Split(eq, if_true, if_false, fall_through);
context()->Plug(if_true, if_false);
}
void FullCodeGenerator::EmitIsJSReceiver(CallRuntime* expr) {
ZoneList<Expression*>* args = expr->arguments();
DCHECK(args->length() == 1);
VisitForAccumulatorValue(args->at(0));
Label materialize_true, materialize_false;
Label* if_true = NULL;
Label* if_false = NULL;
Label* fall_through = NULL;
context()->PrepareTest(&materialize_true, &materialize_false, &if_true,
&if_false, &fall_through);
__ JumpIfSmi(r2, if_false);
__ CompareObjectType(r2, r3, r3, FIRST_JS_RECEIVER_TYPE);
PrepareForBailoutBeforeSplit(expr, true, if_true, if_false);
Split(ge, if_true, if_false, fall_through);
context()->Plug(if_true, if_false);
}
void FullCodeGenerator::EmitIsArray(CallRuntime* expr) {
ZoneList<Expression*>* args = expr->arguments();
DCHECK(args->length() == 1);
VisitForAccumulatorValue(args->at(0));
Label materialize_true, materialize_false;
Label* if_true = NULL;
Label* if_false = NULL;
Label* fall_through = NULL;
context()->PrepareTest(&materialize_true, &materialize_false, &if_true,
&if_false, &fall_through);
__ JumpIfSmi(r2, if_false);
__ CompareObjectType(r2, r3, r3, JS_ARRAY_TYPE);
PrepareForBailoutBeforeSplit(expr, true, if_true, if_false);
Split(eq, if_true, if_false, fall_through);
context()->Plug(if_true, if_false);
}
void FullCodeGenerator::EmitIsTypedArray(CallRuntime* expr) {
ZoneList<Expression*>* args = expr->arguments();
DCHECK(args->length() == 1);
VisitForAccumulatorValue(args->at(0));
Label materialize_true, materialize_false;
Label* if_true = NULL;
Label* if_false = NULL;
Label* fall_through = NULL;
context()->PrepareTest(&materialize_true, &materialize_false, &if_true,
&if_false, &fall_through);
__ JumpIfSmi(r2, if_false);
__ CompareObjectType(r2, r3, r3, JS_TYPED_ARRAY_TYPE);
PrepareForBailoutBeforeSplit(expr, true, if_true, if_false);
Split(eq, if_true, if_false, fall_through);
context()->Plug(if_true, if_false);
}
void FullCodeGenerator::EmitIsJSProxy(CallRuntime* expr) {
ZoneList<Expression*>* args = expr->arguments();
DCHECK(args->length() == 1);
VisitForAccumulatorValue(args->at(0));
Label materialize_true, materialize_false;
Label* if_true = NULL;
Label* if_false = NULL;
Label* fall_through = NULL;
context()->PrepareTest(&materialize_true, &materialize_false, &if_true,
&if_false, &fall_through);
__ JumpIfSmi(r2, if_false);
__ CompareObjectType(r2, r3, r3, JS_PROXY_TYPE);
PrepareForBailoutBeforeSplit(expr, true, if_true, if_false);
Split(eq, if_true, if_false, fall_through);
context()->Plug(if_true, if_false);
}
void FullCodeGenerator::EmitClassOf(CallRuntime* expr) {
ZoneList<Expression*>* args = expr->arguments();
DCHECK(args->length() == 1);
Label done, null, function, non_function_constructor;
VisitForAccumulatorValue(args->at(0));
// If the object is not a JSReceiver, we return null.
__ JumpIfSmi(r2, &null);
STATIC_ASSERT(LAST_JS_RECEIVER_TYPE == LAST_TYPE);
__ CompareObjectType(r2, r2, r3, FIRST_JS_RECEIVER_TYPE);
// Map is now in r2.
__ blt(&null);
// Return 'Function' for JSFunction and JSBoundFunction objects.
__ CmpLogicalP(r3, Operand(FIRST_FUNCTION_TYPE));
STATIC_ASSERT(LAST_FUNCTION_TYPE == LAST_TYPE);
__ bge(&function);
// Check if the constructor in the map is a JS function.
Register instance_type = r4;
__ GetMapConstructor(r2, r2, r3, instance_type);
__ CmpP(instance_type, Operand(JS_FUNCTION_TYPE));
__ bne(&non_function_constructor, Label::kNear);
// r2 now contains the constructor function. Grab the
// instance class name from there.
__ LoadP(r2, FieldMemOperand(r2, JSFunction::kSharedFunctionInfoOffset));
__ LoadP(r2,
FieldMemOperand(r2, SharedFunctionInfo::kInstanceClassNameOffset));
__ b(&done, Label::kNear);
// Functions have class 'Function'.
__ bind(&function);
__ LoadRoot(r2, Heap::kFunction_stringRootIndex);
__ b(&done, Label::kNear);
// Objects with a non-function constructor have class 'Object'.
__ bind(&non_function_constructor);
__ LoadRoot(r2, Heap::kObject_stringRootIndex);
__ b(&done, Label::kNear);
// Non-JS objects have class null.
__ bind(&null);
__ LoadRoot(r2, Heap::kNullValueRootIndex);
// All done.
__ bind(&done);
context()->Plug(r2);
}
void FullCodeGenerator::EmitStringCharCodeAt(CallRuntime* expr) {
ZoneList<Expression*>* args = expr->arguments();
DCHECK(args->length() == 2);
VisitForStackValue(args->at(0));
VisitForAccumulatorValue(args->at(1));
Register object = r3;
Register index = r2;
Register result = r5;
PopOperand(object);
Label need_conversion;
Label index_out_of_range;
Label done;
StringCharCodeAtGenerator generator(object, index, result, &need_conversion,
&need_conversion, &index_out_of_range);
generator.GenerateFast(masm_);
__ b(&done);
__ bind(&index_out_of_range);
// When the index is out of range, the spec requires us to return
// NaN.
__ LoadRoot(result, Heap::kNanValueRootIndex);
__ b(&done);
__ bind(&need_conversion);
// Load the undefined value into the result register, which will
// trigger conversion.
__ LoadRoot(result, Heap::kUndefinedValueRootIndex);
__ b(&done);
NopRuntimeCallHelper call_helper;
generator.GenerateSlow(masm_, NOT_PART_OF_IC_HANDLER, call_helper);
__ bind(&done);
context()->Plug(result);
}
void FullCodeGenerator::EmitCall(CallRuntime* expr) {
ZoneList<Expression*>* args = expr->arguments();
DCHECK_LE(2, args->length());
// Push target, receiver and arguments onto the stack.
for (Expression* const arg : *args) {
VisitForStackValue(arg);
}
PrepareForBailoutForId(expr->CallId(), BailoutState::NO_REGISTERS);
// Move target to r3.
int const argc = args->length() - 2;
__ LoadP(r3, MemOperand(sp, (argc + 1) * kPointerSize));
// Call the target.
__ mov(r2, Operand(argc));
__ Call(isolate()->builtins()->Call(), RelocInfo::CODE_TARGET);
OperandStackDepthDecrement(argc + 1);
RestoreContext();
// Discard the function left on TOS.
context()->DropAndPlug(1, r2);
}
void FullCodeGenerator::EmitGetSuperConstructor(CallRuntime* expr) {
ZoneList<Expression*>* args = expr->arguments();
DCHECK_EQ(1, args->length());
VisitForAccumulatorValue(args->at(0));
__ AssertFunction(r2);
__ LoadP(r2, FieldMemOperand(r2, HeapObject::kMapOffset));
__ LoadP(r2, FieldMemOperand(r2, Map::kPrototypeOffset));
context()->Plug(r2);
}
void FullCodeGenerator::EmitDebugIsActive(CallRuntime* expr) {
DCHECK(expr->arguments()->length() == 0);
ExternalReference debug_is_active =
ExternalReference::debug_is_active_address(isolate());
__ mov(ip, Operand(debug_is_active));
__ LoadlB(r2, MemOperand(ip));
__ SmiTag(r2);
context()->Plug(r2);
}
void FullCodeGenerator::EmitCreateIterResultObject(CallRuntime* expr) {
ZoneList<Expression*>* args = expr->arguments();
DCHECK_EQ(2, args->length());
VisitForStackValue(args->at(0));
VisitForStackValue(args->at(1));
Label runtime, done;
__ Allocate(JSIteratorResult::kSize, r2, r4, r5, &runtime,
NO_ALLOCATION_FLAGS);
__ LoadNativeContextSlot(Context::ITERATOR_RESULT_MAP_INDEX, r3);
__ Pop(r4, r5);
__ LoadRoot(r6, Heap::kEmptyFixedArrayRootIndex);
__ StoreP(r3, FieldMemOperand(r2, HeapObject::kMapOffset), r0);
__ StoreP(r6, FieldMemOperand(r2, JSObject::kPropertiesOffset), r0);
__ StoreP(r6, FieldMemOperand(r2, JSObject::kElementsOffset), r0);
__ StoreP(r4, FieldMemOperand(r2, JSIteratorResult::kValueOffset), r0);
__ StoreP(r5, FieldMemOperand(r2, JSIteratorResult::kDoneOffset), r0);
STATIC_ASSERT(JSIteratorResult::kSize == 5 * kPointerSize);
__ b(&done);
__ bind(&runtime);
CallRuntimeWithOperands(Runtime::kCreateIterResultObject);
__ bind(&done);
context()->Plug(r2);
}
void FullCodeGenerator::EmitLoadJSRuntimeFunction(CallRuntime* expr) {
// Push function.
__ LoadNativeContextSlot(expr->context_index(), r2);
PushOperand(r2);
// Push undefined as the receiver.
__ LoadRoot(r2, Heap::kUndefinedValueRootIndex);
PushOperand(r2);
}
void FullCodeGenerator::EmitCallJSRuntimeFunction(CallRuntime* expr) {
ZoneList<Expression*>* args = expr->arguments();
int arg_count = args->length();
SetCallPosition(expr);
__ LoadP(r3, MemOperand(sp, (arg_count + 1) * kPointerSize), r0);
__ mov(r2, Operand(arg_count));
__ Call(isolate()->builtins()->Call(ConvertReceiverMode::kNullOrUndefined),
RelocInfo::CODE_TARGET);
OperandStackDepthDecrement(arg_count + 1);
RestoreContext();
}
void FullCodeGenerator::VisitUnaryOperation(UnaryOperation* expr) {
switch (expr->op()) {
case Token::DELETE: {
Comment cmnt(masm_, "[ UnaryOperation (DELETE)");
Property* property = expr->expression()->AsProperty();
VariableProxy* proxy = expr->expression()->AsVariableProxy();
if (property != NULL) {
VisitForStackValue(property->obj());
VisitForStackValue(property->key());
CallRuntimeWithOperands(is_strict(language_mode())
? Runtime::kDeleteProperty_Strict
: Runtime::kDeleteProperty_Sloppy);
context()->Plug(r2);
} else if (proxy != NULL) {
Variable* var = proxy->var();
// Delete of an unqualified identifier is disallowed in strict mode but
// "delete this" is allowed.
bool is_this = var->is_this();
DCHECK(is_sloppy(language_mode()) || is_this);
if (var->IsUnallocated()) {
__ LoadGlobalObject(r4);
__ mov(r3, Operand(var->name()));
__ Push(r4, r3);
__ CallRuntime(Runtime::kDeleteProperty_Sloppy);
context()->Plug(r2);
} else {
DCHECK(!var->IsLookupSlot());
DCHECK(var->IsStackAllocated() || var->IsContextSlot());
// Result of deleting non-global, non-dynamic variables is false.
// The subexpression does not have side effects.
context()->Plug(is_this);
}
} else {
// Result of deleting non-property, non-variable reference is true.
// The subexpression may have side effects.
VisitForEffect(expr->expression());
context()->Plug(true);
}
break;
}
case Token::VOID: {
Comment cmnt(masm_, "[ UnaryOperation (VOID)");
VisitForEffect(expr->expression());
context()->Plug(Heap::kUndefinedValueRootIndex);
break;
}
case Token::NOT: {
Comment cmnt(masm_, "[ UnaryOperation (NOT)");
if (context()->IsEffect()) {
// Unary NOT has no side effects so it's only necessary to visit the
// subexpression. Match the optimizing compiler by not branching.
VisitForEffect(expr->expression());
} else if (context()->IsTest()) {
const TestContext* test = TestContext::cast(context());
// The labels are swapped for the recursive call.
VisitForControl(expr->expression(), test->false_label(),
test->true_label(), test->fall_through());
context()->Plug(test->true_label(), test->false_label());
} else {
// We handle value contexts explicitly rather than simply visiting
// for control and plugging the control flow into the context,
// because we need to prepare a pair of extra administrative AST ids
// for the optimizing compiler.
DCHECK(context()->IsAccumulatorValue() || context()->IsStackValue());
Label materialize_true, materialize_false, done;
VisitForControl(expr->expression(), &materialize_false,
&materialize_true, &materialize_true);
if (!context()->IsAccumulatorValue()) OperandStackDepthIncrement(1);
__ bind(&materialize_true);
PrepareForBailoutForId(expr->MaterializeTrueId(),
BailoutState::NO_REGISTERS);
__ LoadRoot(r2, Heap::kTrueValueRootIndex);
if (context()->IsStackValue()) __ push(r2);
__ b(&done);
__ bind(&materialize_false);
PrepareForBailoutForId(expr->MaterializeFalseId(),
BailoutState::NO_REGISTERS);
__ LoadRoot(r2, Heap::kFalseValueRootIndex);
if (context()->IsStackValue()) __ push(r2);
__ bind(&done);
}
break;
}
case Token::TYPEOF: {
Comment cmnt(masm_, "[ UnaryOperation (TYPEOF)");
{
AccumulatorValueContext context(this);
VisitForTypeofValue(expr->expression());
}
__ LoadRR(r5, r2);
__ Call(isolate()->builtins()->Typeof(), RelocInfo::CODE_TARGET);
context()->Plug(r2);
break;
}
default:
UNREACHABLE();
}
}
void FullCodeGenerator::VisitCountOperation(CountOperation* expr) {
DCHECK(expr->expression()->IsValidReferenceExpressionOrThis());
Comment cmnt(masm_, "[ CountOperation");
Property* prop = expr->expression()->AsProperty();
LhsKind assign_type = Property::GetAssignType(prop);
// Evaluate expression and get value.
if (assign_type == VARIABLE) {
DCHECK(expr->expression()->AsVariableProxy()->var() != NULL);
AccumulatorValueContext context(this);
EmitVariableLoad(expr->expression()->AsVariableProxy());
} else {
// Reserve space for result of postfix operation.
if (expr->is_postfix() && !context()->IsEffect()) {
__ LoadSmiLiteral(ip, Smi::kZero);
PushOperand(ip);
}
switch (assign_type) {
case NAMED_PROPERTY: {
// Put the object both on the stack and in the register.
VisitForStackValue(prop->obj());
__ LoadP(LoadDescriptor::ReceiverRegister(), MemOperand(sp, 0));
EmitNamedPropertyLoad(prop);
break;
}
case KEYED_PROPERTY: {
VisitForStackValue(prop->obj());
VisitForStackValue(prop->key());
__ LoadP(LoadDescriptor::ReceiverRegister(),
MemOperand(sp, 1 * kPointerSize));
__ LoadP(LoadDescriptor::NameRegister(), MemOperand(sp, 0));
EmitKeyedPropertyLoad(prop);
break;
}
case NAMED_SUPER_PROPERTY:
case KEYED_SUPER_PROPERTY:
case VARIABLE:
UNREACHABLE();
}
}
// 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(), BailoutState::TOS_REGISTER);
} else {
PrepareForBailoutForId(prop->LoadId(), BailoutState::TOS_REGISTER);
}
// Inline smi case if we are in a loop.
Label stub_call, done;
JumpPatchSite patch_site(masm_);
int count_value = expr->op() == Token::INC ? 1 : -1;
if (ShouldInlineSmiCase(expr->op())) {
Label slow;
patch_site.EmitJumpIfNotSmi(r2, &slow);
// Save result for postfix expressions.
if (expr->is_postfix()) {
if (!context()->IsEffect()) {
// Save the result on the stack. If we have a named or keyed property
// we store the result under the receiver that is currently on top
// of the stack.
switch (assign_type) {
case VARIABLE:
__ push(r2);
break;
case NAMED_PROPERTY:
__ StoreP(r2, MemOperand(sp, kPointerSize));
break;
case KEYED_PROPERTY:
__ StoreP(r2, MemOperand(sp, 2 * kPointerSize));
break;
case NAMED_SUPER_PROPERTY:
case KEYED_SUPER_PROPERTY:
UNREACHABLE();
break;
}
}
}
Register scratch1 = r3;
Register scratch2 = r4;
__ LoadSmiLiteral(scratch1, Smi::FromInt(count_value));
__ AddP(scratch2, r2, scratch1);
__ LoadOnConditionP(nooverflow, r2, scratch2);
__ b(nooverflow, &done);
// Call stub. Undo operation first.
__ b(&stub_call);
__ bind(&slow);
}
// Convert old value into a number.
__ Call(isolate()->builtins()->ToNumber(), RelocInfo::CODE_TARGET);
RestoreContext();
PrepareForBailoutForId(expr->ToNumberId(), BailoutState::TOS_REGISTER);
// Save result for postfix expressions.
if (expr->is_postfix()) {
if (!context()->IsEffect()) {
// Save the result on the stack. If we have a named or keyed property
// we store the result under the receiver that is currently on top
// of the stack.
switch (assign_type) {
case VARIABLE:
PushOperand(r2);
break;
case NAMED_PROPERTY:
__ StoreP(r2, MemOperand(sp, kPointerSize));
break;
case KEYED_PROPERTY:
__ StoreP(r2, MemOperand(sp, 2 * kPointerSize));
break;
case NAMED_SUPER_PROPERTY:
case KEYED_SUPER_PROPERTY:
UNREACHABLE();
break;
}
}
}
__ bind(&stub_call);
__ LoadRR(r3, r2);
__ LoadSmiLiteral(r2, Smi::FromInt(count_value));
SetExpressionPosition(expr);
Handle<Code> code = CodeFactory::BinaryOpIC(isolate(), Token::ADD).code();
CallIC(code, expr->CountBinOpFeedbackId());
patch_site.EmitPatchInfo();
__ bind(&done);
// Store the value returned in r2.
switch (assign_type) {
case VARIABLE: {
VariableProxy* proxy = expr->expression()->AsVariableProxy();
if (expr->is_postfix()) {
{
EffectContext context(this);
EmitVariableAssignment(proxy->var(), Token::ASSIGN, expr->CountSlot(),
proxy->hole_check_mode());
PrepareForBailoutForId(expr->AssignmentId(),
BailoutState::TOS_REGISTER);
context.Plug(r2);
}
// For all contexts except EffectConstant We have the result on
// top of the stack.
if (!context()->IsEffect()) {
context()->PlugTOS();
}
} else {
EmitVariableAssignment(proxy->var(), Token::ASSIGN, expr->CountSlot(),
proxy->hole_check_mode());
PrepareForBailoutForId(expr->AssignmentId(),
BailoutState::TOS_REGISTER);
context()->Plug(r2);
}
break;
}
case NAMED_PROPERTY: {
PopOperand(StoreDescriptor::ReceiverRegister());
CallStoreIC(expr->CountSlot(), prop->key()->AsLiteral()->value());
PrepareForBailoutForId(expr->AssignmentId(), BailoutState::TOS_REGISTER);
if (expr->is_postfix()) {
if (!context()->IsEffect()) {
context()->PlugTOS();
}
} else {
context()->Plug(r2);
}
break;
}
case KEYED_PROPERTY: {
PopOperands(StoreDescriptor::ReceiverRegister(),
StoreDescriptor::NameRegister());
CallKeyedStoreIC(expr->CountSlot());
PrepareForBailoutForId(expr->AssignmentId(), BailoutState::TOS_REGISTER);
if (expr->is_postfix()) {
if (!context()->IsEffect()) {
context()->PlugTOS();
}
} else {
context()->Plug(r2);
}
break;
}
case NAMED_SUPER_PROPERTY:
case KEYED_SUPER_PROPERTY:
UNREACHABLE();
break;
}
}
void FullCodeGenerator::EmitLiteralCompareTypeof(Expression* expr,
Expression* sub_expr,
Handle<String> check) {
Label materialize_true, materialize_false;
Label* if_true = NULL;
Label* if_false = NULL;
Label* fall_through = NULL;
context()->PrepareTest(&materialize_true, &materialize_false, &if_true,
&if_false, &fall_through);
{
AccumulatorValueContext context(this);
VisitForTypeofValue(sub_expr);
}
PrepareForBailoutBeforeSplit(expr, true, if_true, if_false);
Factory* factory = isolate()->factory();
if (String::Equals(check, factory->number_string())) {
__ JumpIfSmi(r2, if_true);
__ LoadP(r2, FieldMemOperand(r2, HeapObject::kMapOffset));
__ CompareRoot(r2, Heap::kHeapNumberMapRootIndex);
Split(eq, if_true, if_false, fall_through);
} else if (String::Equals(check, factory->string_string())) {
__ JumpIfSmi(r2, if_false);
__ CompareObjectType(r2, r2, r3, FIRST_NONSTRING_TYPE);
Split(lt, if_true, if_false, fall_through);
} else if (String::Equals(check, factory->symbol_string())) {
__ JumpIfSmi(r2, if_false);
__ CompareObjectType(r2, r2, r3, SYMBOL_TYPE);
Split(eq, if_true, if_false, fall_through);
} else if (String::Equals(check, factory->boolean_string())) {
__ CompareRoot(r2, Heap::kTrueValueRootIndex);
__ beq(if_true);
__ CompareRoot(r2, Heap::kFalseValueRootIndex);
Split(eq, if_true, if_false, fall_through);
} else if (String::Equals(check, factory->undefined_string())) {
__ CompareRoot(r2, Heap::kNullValueRootIndex);
__ beq(if_false);
__ JumpIfSmi(r2, if_false);
// Check for undetectable objects => true.
__ LoadP(r2, FieldMemOperand(r2, HeapObject::kMapOffset));
__ tm(FieldMemOperand(r2, Map::kBitFieldOffset),
Operand(1 << Map::kIsUndetectable));
Split(ne, if_true, if_false, fall_through);
} else if (String::Equals(check, factory->function_string())) {
__ JumpIfSmi(r2, if_false);
__ LoadP(r2, FieldMemOperand(r2, HeapObject::kMapOffset));
__ LoadlB(r3, FieldMemOperand(r2, Map::kBitFieldOffset));
__ AndP(r3, r3,
Operand((1 << Map::kIsCallable) | (1 << Map::kIsUndetectable)));
__ CmpP(r3, Operand(1 << Map::kIsCallable));
Split(eq, if_true, if_false, fall_through);
} else if (String::Equals(check, factory->object_string())) {
__ JumpIfSmi(r2, if_false);
__ CompareRoot(r2, Heap::kNullValueRootIndex);
__ beq(if_true);
STATIC_ASSERT(LAST_JS_RECEIVER_TYPE == LAST_TYPE);
__ CompareObjectType(r2, r2, r3, FIRST_JS_RECEIVER_TYPE);
__ blt(if_false);
__ tm(FieldMemOperand(r2, Map::kBitFieldOffset),
Operand((1 << Map::kIsCallable) | (1 << Map::kIsUndetectable)));
Split(eq, if_true, if_false, fall_through);
// clang-format off
#define SIMD128_TYPE(TYPE, Type, type, lane_count, lane_type) \
} else if (String::Equals(check, factory->type##_string())) { \
__ JumpIfSmi(r2, if_false); \
__ LoadP(r2, FieldMemOperand(r2, HeapObject::kMapOffset)); \
__ CompareRoot(r2, Heap::k##Type##MapRootIndex); \
Split(eq, if_true, if_false, fall_through);
SIMD128_TYPES(SIMD128_TYPE)
#undef SIMD128_TYPE
// clang-format on
} else {
if (if_false != fall_through) __ b(if_false);
}
context()->Plug(if_true, if_false);
}
void FullCodeGenerator::VisitCompareOperation(CompareOperation* expr) {
Comment cmnt(masm_, "[ CompareOperation");
// First we try a fast inlined version of the compare when one of
// the operands is a literal.
if (TryLiteralCompare(expr)) return;
// Always perform the comparison for its control flow. Pack the result
// into the expression's context after the comparison is performed.
Label materialize_true, materialize_false;
Label* if_true = NULL;
Label* if_false = NULL;
Label* fall_through = NULL;
context()->PrepareTest(&materialize_true, &materialize_false, &if_true,
&if_false, &fall_through);
Token::Value op = expr->op();
VisitForStackValue(expr->left());
switch (op) {
case Token::IN:
VisitForStackValue(expr->right());
SetExpressionPosition(expr);
EmitHasProperty();
PrepareForBailoutBeforeSplit(expr, false, NULL, NULL);
__ CompareRoot(r2, Heap::kTrueValueRootIndex);
Split(eq, if_true, if_false, fall_through);
break;
case Token::INSTANCEOF: {
VisitForAccumulatorValue(expr->right());
SetExpressionPosition(expr);
PopOperand(r3);
__ Call(isolate()->builtins()->InstanceOf(), RelocInfo::CODE_TARGET);
RestoreContext();
PrepareForBailoutBeforeSplit(expr, false, NULL, NULL);
__ CompareRoot(r2, Heap::kTrueValueRootIndex);
Split(eq, if_true, if_false, fall_through);
break;
}
default: {
VisitForAccumulatorValue(expr->right());
SetExpressionPosition(expr);
Condition cond = CompareIC::ComputeCondition(op);
PopOperand(r3);
bool inline_smi_code = ShouldInlineSmiCase(op);
JumpPatchSite patch_site(masm_);
if (inline_smi_code) {
Label slow_case;
__ LoadRR(r4, r3);
__ OrP(r4, r2);
patch_site.EmitJumpIfNotSmi(r4, &slow_case);
__ CmpP(r3, r2);
Split(cond, if_true, if_false, NULL);
__ bind(&slow_case);
}
Handle<Code> ic = CodeFactory::CompareIC(isolate(), op).code();
CallIC(ic, expr->CompareOperationFeedbackId());
patch_site.EmitPatchInfo();
PrepareForBailoutBeforeSplit(expr, true, if_true, if_false);
__ CmpP(r2, Operand::Zero());
Split(cond, if_true, if_false, fall_through);
}
}
// Convert the result of the comparison into one expected for this
// expression's context.
context()->Plug(if_true, if_false);
}
void FullCodeGenerator::EmitLiteralCompareNil(CompareOperation* expr,
Expression* sub_expr,
NilValue nil) {
Label materialize_true, materialize_false;
Label* if_true = NULL;
Label* if_false = NULL;
Label* fall_through = NULL;
context()->PrepareTest(&materialize_true, &materialize_false, &if_true,
&if_false, &fall_through);
VisitForAccumulatorValue(sub_expr);
PrepareForBailoutBeforeSplit(expr, true, if_true, if_false);
if (expr->op() == Token::EQ_STRICT) {
Heap::RootListIndex nil_value = nil == kNullValue
? Heap::kNullValueRootIndex
: Heap::kUndefinedValueRootIndex;
__ CompareRoot(r2, nil_value);
Split(eq, if_true, if_false, fall_through);
} else {
__ JumpIfSmi(r2, if_false);
__ LoadP(r2, FieldMemOperand(r2, HeapObject::kMapOffset));
__ LoadlB(r3, FieldMemOperand(r2, Map::kBitFieldOffset));
__ AndP(r0, r3, Operand(1 << Map::kIsUndetectable));
Split(ne, if_true, if_false, fall_through);
}
context()->Plug(if_true, if_false);
}
Register FullCodeGenerator::result_register() { return r2; }
Register FullCodeGenerator::context_register() { return cp; }
void FullCodeGenerator::LoadFromFrameField(int frame_offset, Register value) {
DCHECK_EQ(static_cast<int>(POINTER_SIZE_ALIGN(frame_offset)), frame_offset);
__ LoadP(value, MemOperand(fp, frame_offset));
}
void FullCodeGenerator::StoreToFrameField(int frame_offset, Register value) {
DCHECK_EQ(static_cast<int>(POINTER_SIZE_ALIGN(frame_offset)), frame_offset);
__ StoreP(value, MemOperand(fp, frame_offset));
}
void FullCodeGenerator::LoadContextField(Register dst, int context_index) {
__ LoadP(dst, ContextMemOperand(cp, context_index), r0);
}
void FullCodeGenerator::PushFunctionArgumentForContextAllocation() {
DeclarationScope* closure_scope = scope()->GetClosureScope();
if (closure_scope->is_script_scope() || closure_scope->is_module_scope()) {
// Contexts nested in the native context have a canonical empty function
// as their closure, not the anonymous closure containing the global
// code.
__ LoadNativeContextSlot(Context::CLOSURE_INDEX, ip);
} else if (closure_scope->is_eval_scope()) {
// Contexts created by a call to eval have the same closure as the
// context calling eval, not the anonymous closure containing the eval
// code. Fetch it from the context.
__ LoadP(ip, ContextMemOperand(cp, Context::CLOSURE_INDEX));
} else {
DCHECK(closure_scope->is_function_scope());
__ LoadP(ip, MemOperand(fp, JavaScriptFrameConstants::kFunctionOffset));
}
PushOperand(ip);
}
#undef __
#if V8_TARGET_ARCH_S390X
static const FourByteInstr kInterruptBranchInstruction = 0xA7A40011;
static const FourByteInstr kOSRBranchInstruction = 0xA7040011;
static const int16_t kBackEdgeBranchOffsetInHalfWords = 0x11;
#else
static const FourByteInstr kInterruptBranchInstruction = 0xA7A4000D;
static const FourByteInstr kOSRBranchInstruction = 0xA704000D;
static const int16_t kBackEdgeBranchOffsetInHalfWords = 0xD;
#endif
void BackEdgeTable::PatchAt(Code* unoptimized_code, Address pc,
BackEdgeState target_state,
Code* replacement_code) {
Address call_address = Assembler::target_address_from_return_address(pc);
Address branch_address = call_address - 4;
Isolate* isolate = unoptimized_code->GetIsolate();
CodePatcher patcher(isolate, branch_address, 4);
switch (target_state) {
case INTERRUPT: {
// <decrement profiling counter>
// bge <ok> ;; patched to GE BRC
// brasrl r14, <interrupt stub address>
// <reset profiling counter>
// ok-label
patcher.masm()->brc(ge, Operand(kBackEdgeBranchOffsetInHalfWords));
break;
}
case ON_STACK_REPLACEMENT:
// <decrement profiling counter>
// brc 0x0, <ok> ;; patched to NOP BRC
// brasrl r14, <interrupt stub address>
// <reset profiling counter>
// ok-label ----- pc_after points here
patcher.masm()->brc(CC_NOP, Operand(kBackEdgeBranchOffsetInHalfWords));
break;
}
// Replace the stack check address in the mov sequence with the
// entry address of the replacement code.
Assembler::set_target_address_at(isolate, call_address, unoptimized_code,
replacement_code->entry());
unoptimized_code->GetHeap()->incremental_marking()->RecordCodeTargetPatch(
unoptimized_code, call_address, replacement_code);
}
BackEdgeTable::BackEdgeState BackEdgeTable::GetBackEdgeState(
Isolate* isolate, Code* unoptimized_code, Address pc) {
Address call_address = Assembler::target_address_from_return_address(pc);
Address branch_address = call_address - 4;
#ifdef DEBUG
Address interrupt_address =
Assembler::target_address_at(call_address, unoptimized_code);
#endif
DCHECK(BRC == Instruction::S390OpcodeValue(branch_address));
// For interrupt, we expect a branch greater than or equal
// i.e. BRC 0xa, +XXXX (0xA7A4XXXX)
FourByteInstr br_instr = Instruction::InstructionBits(
reinterpret_cast<const byte*>(branch_address));
if (kInterruptBranchInstruction == br_instr) {
DCHECK(interrupt_address == isolate->builtins()->InterruptCheck()->entry());
return INTERRUPT;
}
// Expect BRC to be patched to NOP branch.
// i.e. BRC 0x0, +XXXX (0xA704XXXX)
USE(kOSRBranchInstruction);
DCHECK(kOSRBranchInstruction == br_instr);
DCHECK(interrupt_address ==
isolate->builtins()->OnStackReplacement()->entry());
return ON_STACK_REPLACEMENT;
}
} // namespace internal
} // namespace v8
#endif // V8_TARGET_ARCH_S390