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dart / sdk.git / 784722f2eddb5d3be00183fb7cb7787109cd07b5 / . / runtime / vm / intermediate_language_ia32.cc
blob: 00cd501db1599399e41b91a4dccaf4146888d6be [file] [log] [blame]
// Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
#include "vm/globals.h" // Needed here to get TARGET_ARCH_IA32.
#if defined(TARGET_ARCH_IA32)
#include "vm/intermediate_language.h"
#include "lib/error.h"
#include "vm/dart_entry.h"
#include "vm/flow_graph_compiler.h"
#include "vm/locations.h"
#include "vm/object_store.h"
#include "vm/parser.h"
#include "vm/stack_frame.h"
#include "vm/stub_code.h"
#include "vm/symbols.h"
#define __ compiler->assembler()->
namespace dart {
DECLARE_FLAG(int, optimization_counter_threshold);
DECLARE_FLAG(bool, propagate_ic_data);
// Generic summary for call instructions that have all arguments pushed
// on the stack and return the result in a fixed register EAX.
LocationSummary* Instruction::MakeCallSummary() {
LocationSummary* result = new LocationSummary(0, 0, LocationSummary::kCall);
result->set_out(Location::RegisterLocation(EAX));
return result;
}
LocationSummary* PushArgumentInstr::MakeLocationSummary() const {
const intptr_t kNumInputs = 1;
const intptr_t kNumTemps= 0;
LocationSummary* locs =
new LocationSummary(kNumInputs, kNumTemps, LocationSummary::kNoCall);
locs->set_in(0, Location::AnyOrConstant(value()));
return locs;
}
void PushArgumentInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
// In SSA mode, we need an explicit push. Nothing to do in non-SSA mode
// where PushArgument is handled by BindInstr::EmitNativeCode.
if (compiler->is_optimizing()) {
Location value = locs()->in(0);
if (value.IsRegister()) {
__ pushl(value.reg());
} else if (value.IsConstant()) {
__ PushObject(value.constant());
} else {
ASSERT(value.IsStackSlot());
__ pushl(value.ToStackSlotAddress());
}
}
}
LocationSummary* ReturnInstr::MakeLocationSummary() const {
const intptr_t kNumInputs = 1;
const intptr_t kNumTemps = 0;
LocationSummary* locs =
new LocationSummary(kNumInputs, kNumTemps, LocationSummary::kNoCall);
locs->set_in(0, Location::RegisterLocation(EAX));
return locs;
}
// Attempt optimized compilation at return instruction instead of at the entry.
// The entry needs to be patchable, no inlined objects are allowed in the area
// that will be overwritten by the patch instruction: a jump).
void ReturnInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
Register result = locs()->in(0).reg();
ASSERT(result == EAX);
#if defined(DEBUG)
// TODO(srdjan): Fix for functions with finally clause.
// A finally clause may leave a previously pushed return value if it
// has its own return instruction. Method that have finally are currently
// not optimized.
if (!compiler->HasFinally()) {
__ Comment("Stack Check");
Label done;
const intptr_t fp_sp_dist =
(kFirstLocalSlotIndex + 1 - compiler->StackSize()) * kWordSize;
ASSERT(fp_sp_dist <= 0);
__ movl(EDI, ESP);
__ subl(EDI, EBP);
__ cmpl(EDI, Immediate(fp_sp_dist));
__ j(EQUAL, &done, Assembler::kNearJump);
__ int3();
__ Bind(&done);
}
#endif
__ LeaveFrame();
__ ret();
// Generate 1 byte NOP so that the debugger can patch the
// return pattern with a call to the debug stub.
__ nop(1);
compiler->AddCurrentDescriptor(PcDescriptors::kReturn,
Isolate::kNoDeoptId,
token_pos());
}
LocationSummary* ClosureCallInstr::MakeLocationSummary() const {
const intptr_t kNumInputs = 0;
const intptr_t kNumTemps = 1;
LocationSummary* result =
new LocationSummary(kNumInputs, kNumTemps, LocationSummary::kCall);
result->set_out(Location::RegisterLocation(EAX));
result->set_temp(0, Location::RegisterLocation(EDX)); // Arg. descriptor.
return result;
}
LocationSummary* LoadLocalInstr::MakeLocationSummary() const {
return LocationSummary::Make(0,
Location::RequiresRegister(),
LocationSummary::kNoCall);
}
void LoadLocalInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
Register result = locs()->out().reg();
__ movl(result, Address(EBP, local().index() * kWordSize));
}
LocationSummary* StoreLocalInstr::MakeLocationSummary() const {
return LocationSummary::Make(1,
Location::SameAsFirstInput(),
LocationSummary::kNoCall);
}
void StoreLocalInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
Register value = locs()->in(0).reg();
Register result = locs()->out().reg();
ASSERT(result == value); // Assert that register assignment is correct.
__ movl(Address(EBP, local().index() * kWordSize), value);
}
LocationSummary* ConstantInstr::MakeLocationSummary() const {
return LocationSummary::Make(0,
Location::RequiresRegister(),
LocationSummary::kNoCall);
}
void ConstantInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
// The register allocator drops constant definitions that have no uses.
if (!locs()->out().IsInvalid()) {
Register result = locs()->out().reg();
__ LoadObject(result, value());
}
}
LocationSummary* AssertAssignableInstr::MakeLocationSummary() const {
const intptr_t kNumInputs = 3;
const intptr_t kNumTemps = 0;
LocationSummary* summary =
new LocationSummary(kNumInputs, kNumTemps, LocationSummary::kCall);
summary->set_in(0, Location::RegisterLocation(EAX)); // Value.
summary->set_in(1, Location::RegisterLocation(ECX)); // Instantiator.
summary->set_in(2, Location::RegisterLocation(EDX)); // Type arguments.
summary->set_out(Location::RegisterLocation(EAX));
return summary;
}
LocationSummary* AssertBooleanInstr::MakeLocationSummary() const {
const intptr_t kNumInputs = 1;
const intptr_t kNumTemps = 0;
LocationSummary* locs =
new LocationSummary(kNumInputs, kNumTemps, LocationSummary::kCall);
locs->set_in(0, Location::RegisterLocation(EAX));
locs->set_out(Location::RegisterLocation(EAX));
return locs;
}
static void EmitAssertBoolean(Register reg,
intptr_t token_pos,
intptr_t deopt_id,
LocationSummary* locs,
FlowGraphCompiler* compiler) {
// Check that the type of the value is allowed in conditional context.
// Call the runtime if the object is not bool::true or bool::false.
ASSERT(locs->always_calls());
Label done;
__ CompareObject(reg, Bool::True());
__ j(EQUAL, &done, Assembler::kNearJump);
__ CompareObject(reg, Bool::False());
__ j(EQUAL, &done, Assembler::kNearJump);
__ pushl(reg); // Push the source object.
compiler->GenerateCallRuntime(token_pos,
deopt_id,
kConditionTypeErrorRuntimeEntry,
locs);
// We should never return here.
__ int3();
__ Bind(&done);
}
void AssertBooleanInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
Register obj = locs()->in(0).reg();
Register result = locs()->out().reg();
EmitAssertBoolean(obj, token_pos(), deopt_id(), locs(), compiler);
ASSERT(obj == result);
}
LocationSummary* ArgumentDefinitionTestInstr::MakeLocationSummary() const {
const intptr_t kNumInputs = 1;
const intptr_t kNumTemps = 0;
LocationSummary* locs =
new LocationSummary(kNumInputs, kNumTemps, LocationSummary::kCall);
locs->set_in(0, Location::RegisterLocation(EAX));
locs->set_out(Location::RegisterLocation(EAX));
return locs;
}
void ArgumentDefinitionTestInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
Register saved_args_desc = locs()->in(0).reg();
Register result = locs()->out().reg();
// Push the result place holder initialized to NULL.
__ PushObject(Object::ZoneHandle());
__ pushl(Immediate(Smi::RawValue(formal_parameter_index())));
__ PushObject(formal_parameter_name());
__ pushl(saved_args_desc);
compiler->GenerateCallRuntime(token_pos(),
deopt_id(),
kArgumentDefinitionTestRuntimeEntry,
locs());
__ Drop(3);
__ popl(result); // Pop bool result.
}
static Condition TokenKindToSmiCondition(Token::Kind kind) {
switch (kind) {
case Token::kEQ: return EQUAL;
case Token::kNE: return NOT_EQUAL;
case Token::kLT: return LESS;
case Token::kGT: return GREATER;
case Token::kLTE: return LESS_EQUAL;
case Token::kGTE: return GREATER_EQUAL;
default:
UNREACHABLE();
return OVERFLOW;
}
}
LocationSummary* EqualityCompareInstr::MakeLocationSummary() const {
const intptr_t kNumInputs = 2;
const bool is_checked_strict_equal =
HasICData() && ic_data()->AllTargetsHaveSameOwner(kInstanceCid);
if (receiver_class_id() == kMintCid) {
const intptr_t kNumTemps = 1;
LocationSummary* locs =
new LocationSummary(kNumInputs, kNumTemps, LocationSummary::kNoCall);
locs->set_in(0, Location::RequiresFpuRegister());
locs->set_in(1, Location::RequiresFpuRegister());
locs->set_temp(0, Location::RequiresRegister());
locs->set_out(Location::RequiresRegister());
return locs;
}
if (receiver_class_id() == kDoubleCid) {
const intptr_t kNumTemps = 0;
LocationSummary* locs =
new LocationSummary(kNumInputs, kNumTemps, LocationSummary::kNoCall);
locs->set_in(0, Location::RequiresFpuRegister());
locs->set_in(1, Location::RequiresFpuRegister());
locs->set_out(Location::RequiresRegister());
return locs;
}
if (receiver_class_id() == kSmiCid) {
const intptr_t kNumTemps = 0;
LocationSummary* locs =
new LocationSummary(kNumInputs, kNumTemps, LocationSummary::kNoCall);
locs->set_in(0, Location::RegisterOrConstant(left()));
// Only one input can be a constant operand. The case of two constant
// operands should be handled by constant propagation.
locs->set_in(1, locs->in(0).IsConstant()
? Location::RequiresRegister()
: Location::RegisterOrConstant(right()));
locs->set_out(Location::RequiresRegister());
return locs;
}
if (is_checked_strict_equal) {
const intptr_t kNumTemps = 1;
LocationSummary* locs =
new LocationSummary(kNumInputs, kNumTemps, LocationSummary::kNoCall);
locs->set_in(0, Location::RequiresRegister());
locs->set_in(1, Location::RequiresRegister());
locs->set_temp(0, Location::RequiresRegister());
locs->set_out(Location::RequiresRegister());
return locs;
}
if (IsPolymorphic()) {
const intptr_t kNumTemps = 1;
LocationSummary* locs =
new LocationSummary(kNumInputs, kNumTemps, LocationSummary::kCall);
locs->set_in(0, Location::RegisterLocation(ECX));
locs->set_in(1, Location::RegisterLocation(EDX));
locs->set_temp(0, Location::RegisterLocation(EBX));
locs->set_out(Location::RegisterLocation(EAX));
return locs;
}
const intptr_t kNumTemps = 1;
LocationSummary* locs =
new LocationSummary(kNumInputs, kNumTemps, LocationSummary::kCall);
locs->set_in(0, Location::RegisterLocation(EBX));
locs->set_in(1, Location::RegisterLocation(EDX));
locs->set_temp(0, Location::RegisterLocation(ECX));
locs->set_out(Location::RegisterLocation(EAX));
return locs;
}
static void EmitEqualityAsInstanceCall(FlowGraphCompiler* compiler,
intptr_t deopt_id,
intptr_t token_pos,
Token::Kind kind,
LocationSummary* locs,
const ICData& original_ic_data) {
if (!compiler->is_optimizing()) {
compiler->AddCurrentDescriptor(PcDescriptors::kDeopt,
deopt_id,
token_pos);
}
const int kNumberOfArguments = 2;
const Array& kNoArgumentNames = Array::Handle();
const int kNumArgumentsChecked = 2;
const Immediate& raw_null =
Immediate(reinterpret_cast<intptr_t>(Object::null()));
Label check_identity;
__ cmpl(Address(ESP, 0 * kWordSize), raw_null);
__ j(EQUAL, &check_identity);
__ cmpl(Address(ESP, 1 * kWordSize), raw_null);
__ j(EQUAL, &check_identity);
ICData& equality_ic_data = ICData::ZoneHandle();
if (compiler->is_optimizing() && FLAG_propagate_ic_data) {
ASSERT(!original_ic_data.IsNull());
if (original_ic_data.NumberOfChecks() == 0) {
// IC call for reoptimization populates original ICData.
equality_ic_data = original_ic_data.raw();
} else {
// Megamorphic call.
equality_ic_data = original_ic_data.AsUnaryClassChecks();
}
} else {
equality_ic_data = ICData::New(compiler->parsed_function().function(),
Symbols::EqualOperator(),
deopt_id,
kNumArgumentsChecked);
}
compiler->GenerateInstanceCall(deopt_id,
token_pos,
kNumberOfArguments,
kNoArgumentNames,
locs,
equality_ic_data);
Label check_ne;
__ jmp(&check_ne);
__ Bind(&check_identity);
Label equality_done;
if (compiler->is_optimizing()) {
// No need to update IC data.
Label is_true;
__ popl(EAX);
__ popl(EDX);
__ cmpl(EAX, EDX);
__ j(EQUAL, &is_true);
__ LoadObject(EAX, (kind == Token::kEQ) ? Bool::False() : Bool::True());
__ jmp(&equality_done);
__ Bind(&is_true);
__ LoadObject(EAX, (kind == Token::kEQ) ? Bool::True() : Bool::False());
if (kind == Token::kNE) {
// Skip not-equal result conversion.
__ jmp(&equality_done);
}
} else {
// Call stub, load IC data in register. The stub will update ICData if
// necessary.
Register ic_data_reg = locs->temp(0).reg();
ASSERT(ic_data_reg == ECX); // Stub depends on it.
__ LoadObject(ic_data_reg, equality_ic_data);
compiler->GenerateCall(token_pos,
&StubCode::EqualityWithNullArgLabel(),
PcDescriptors::kOther,
locs);
__ Drop(2);
}
__ Bind(&check_ne);
if (kind == Token::kNE) {
Label true_label, done;
// Negate the condition: true label returns false and vice versa.
__ CompareObject(EAX, Bool::True());
__ j(EQUAL, &true_label, Assembler::kNearJump);
__ LoadObject(EAX, Bool::True());
__ jmp(&done, Assembler::kNearJump);
__ Bind(&true_label);
__ LoadObject(EAX, Bool::False());
__ Bind(&done);
}
__ Bind(&equality_done);
}
static void LoadValueCid(FlowGraphCompiler* compiler,
Register value_cid_reg,
Register value_reg,
Label* value_is_smi = NULL) {
Label done;
if (value_is_smi == NULL) {
__ movl(value_cid_reg, Immediate(kSmiCid));
}
__ testl(value_reg, Immediate(kSmiTagMask));
if (value_is_smi == NULL) {
__ j(ZERO, &done, Assembler::kNearJump);
} else {
__ j(ZERO, value_is_smi);
}
__ LoadClassId(value_cid_reg, value_reg);
__ Bind(&done);
}
static void EmitEqualityAsPolymorphicCall(FlowGraphCompiler* compiler,
const ICData& orig_ic_data,
LocationSummary* locs,
BranchInstr* branch,
Token::Kind kind,
intptr_t deopt_id,
intptr_t token_pos) {
ASSERT((kind == Token::kEQ) || (kind == Token::kNE));
const ICData& ic_data = ICData::Handle(orig_ic_data.AsUnaryClassChecks());
ASSERT(ic_data.NumberOfChecks() > 0);
ASSERT(ic_data.num_args_tested() == 1);
Label* deopt = compiler->AddDeoptStub(deopt_id, kDeoptEquality);
Register left = locs->in(0).reg();
Register right = locs->in(1).reg();
Register temp = locs->temp(0).reg();
LoadValueCid(compiler, temp, left,
(ic_data.GetReceiverClassIdAt(0) == kSmiCid) ? NULL : deopt);
// 'temp' contains class-id of the left argument.
ObjectStore* object_store = Isolate::Current()->object_store();
Condition cond = TokenKindToSmiCondition(kind);
Label done;
const intptr_t len = ic_data.NumberOfChecks();
for (intptr_t i = 0; i < len; i++) {
// Assert that the Smi is at position 0, if at all.
ASSERT((ic_data.GetReceiverClassIdAt(i) != kSmiCid) || (i == 0));
Label next_test;
__ cmpl(temp, Immediate(ic_data.GetReceiverClassIdAt(i)));
if (i < len - 1) {
__ j(NOT_EQUAL, &next_test);
} else {
__ j(NOT_EQUAL, deopt);
}
const Function& target = Function::ZoneHandle(ic_data.GetTargetAt(i));
if (target.Owner() == object_store->object_class()) {
// Object.== is same as ===.
__ Drop(2);
__ cmpl(left, right);
if (branch != NULL) {
branch->EmitBranchOnCondition(compiler, cond);
} else {
Register result = locs->out().reg();
Label load_true;
__ j(cond, &load_true, Assembler::kNearJump);
__ LoadObject(result, Bool::False());
__ jmp(&done);
__ Bind(&load_true);
__ LoadObject(result, Bool::True());
}
} else {
const int kNumberOfArguments = 2;
const Array& kNoArgumentNames = Array::Handle();
compiler->GenerateStaticCall(deopt_id,
token_pos,
target,
kNumberOfArguments,
kNoArgumentNames,
locs);
if (branch == NULL) {
if (kind == Token::kNE) {
Label false_label;
__ CompareObject(EAX, Bool::True());
__ j(EQUAL, &false_label, Assembler::kNearJump);
__ LoadObject(EAX, Bool::True());
__ jmp(&done);
__ Bind(&false_label);
__ LoadObject(EAX, Bool::False());
}
} else {
if (branch->is_checked()) {
EmitAssertBoolean(EAX, token_pos, deopt_id, locs, compiler);
}
__ CompareObject(EAX, Bool::True());
branch->EmitBranchOnCondition(compiler, cond);
}
}
if (i < len - 1) {
__ jmp(&done);
__ Bind(&next_test);
}
}
__ Bind(&done);
}
// Emit code when ICData's targets are all Object == (which is ===).
static void EmitCheckedStrictEqual(FlowGraphCompiler* compiler,
const ICData& ic_data,
const LocationSummary& locs,
Token::Kind kind,
BranchInstr* branch,
intptr_t deopt_id) {
ASSERT((kind == Token::kEQ) || (kind == Token::kNE));
Register left = locs.in(0).reg();
Register right = locs.in(1).reg();
Register temp = locs.temp(0).reg();
Label* deopt = compiler->AddDeoptStub(deopt_id, kDeoptEquality);
__ testl(left, Immediate(kSmiTagMask));
__ j(ZERO, deopt);
// 'left' is not Smi.
const Immediate& raw_null =
Immediate(reinterpret_cast<intptr_t>(Object::null()));
Label identity_compare;
__ cmpl(right, raw_null);
__ j(EQUAL, &identity_compare);
__ cmpl(left, raw_null);
__ j(EQUAL, &identity_compare);
__ LoadClassId(temp, left);
const intptr_t len = ic_data.NumberOfChecks();
for (intptr_t i = 0; i < len; i++) {
__ cmpl(temp, Immediate(ic_data.GetReceiverClassIdAt(i)));
if (i == (len - 1)) {
__ j(NOT_EQUAL, deopt);
} else {
__ j(EQUAL, &identity_compare);
}
}
__ Bind(&identity_compare);
__ cmpl(left, right);
if (branch == NULL) {
Label done, is_equal;
Register result = locs.out().reg();
__ j(EQUAL, &is_equal, Assembler::kNearJump);
// Not equal.
__ LoadObject(result, (kind == Token::kEQ) ? Bool::False() : Bool::True());
__ jmp(&done, Assembler::kNearJump);
__ Bind(&is_equal);
__ LoadObject(result, (kind == Token::kEQ) ? Bool::True() : Bool::False());
__ Bind(&done);
} else {
Condition cond = TokenKindToSmiCondition(kind);
branch->EmitBranchOnCondition(compiler, cond);
}
}
// First test if receiver is NULL, in which case === is applied.
// If type feedback was provided (lists of <class-id, target>), do a
// type by type check (either === or static call to the operator.
static void EmitGenericEqualityCompare(FlowGraphCompiler* compiler,
LocationSummary* locs,
Token::Kind kind,
BranchInstr* branch,
const ICData& ic_data,
intptr_t deopt_id,
intptr_t token_pos) {
ASSERT((kind == Token::kEQ) || (kind == Token::kNE));
ASSERT(!ic_data.IsNull() && (ic_data.NumberOfChecks() > 0));
Register left = locs->in(0).reg();
Register right = locs->in(1).reg();
const Immediate& raw_null =
Immediate(reinterpret_cast<intptr_t>(Object::null()));
Label done, identity_compare, non_null_compare;
__ cmpl(right, raw_null);
__ j(EQUAL, &identity_compare, Assembler::kNearJump);
__ cmpl(left, raw_null);
__ j(NOT_EQUAL, &non_null_compare, Assembler::kNearJump);
// Comparison with NULL is "===".
__ Bind(&identity_compare);
__ cmpl(left, right);
Condition cond = TokenKindToSmiCondition(kind);
if (branch != NULL) {
branch->EmitBranchOnCondition(compiler, cond);
} else {
Register result = locs->out().reg();
Label load_true;
__ j(cond, &load_true, Assembler::kNearJump);
__ LoadObject(result, Bool::False());
__ jmp(&done);
__ Bind(&load_true);
__ LoadObject(result, Bool::True());
}
__ jmp(&done);
__ Bind(&non_null_compare); // Receiver is not null.
__ pushl(left);
__ pushl(right);
EmitEqualityAsPolymorphicCall(compiler, ic_data, locs, branch, kind,
deopt_id, token_pos);
__ Bind(&done);
}
static void EmitSmiComparisonOp(FlowGraphCompiler* compiler,
const LocationSummary& locs,
Token::Kind kind,
BranchInstr* branch) {
Location left = locs.in(0);
Location right = locs.in(1);
ASSERT(!left.IsConstant() || !right.IsConstant());
Condition true_condition = TokenKindToSmiCondition(kind);
if (left.IsConstant()) {
__ CompareObject(right.reg(), left.constant());
true_condition = FlowGraphCompiler::FlipCondition(true_condition);
} else if (right.IsConstant()) {
__ CompareObject(left.reg(), right.constant());
} else {
__ cmpl(left.reg(), right.reg());
}
if (branch != NULL) {
branch->EmitBranchOnCondition(compiler, true_condition);
} else {
Register result = locs.out().reg();
Label done, is_true;
__ j(true_condition, &is_true);
__ LoadObject(result, Bool::False());
__ jmp(&done);
__ Bind(&is_true);
__ LoadObject(result, Bool::True());
__ Bind(&done);
}
}
static Condition TokenKindToMintCondition(Token::Kind kind) {
switch (kind) {
case Token::kEQ: return EQUAL;
case Token::kNE: return NOT_EQUAL;
case Token::kLT: return LESS;
case Token::kGT: return GREATER;
case Token::kLTE: return LESS_EQUAL;
case Token::kGTE: return GREATER_EQUAL;
default:
UNREACHABLE();
return OVERFLOW;
}
}
static void EmitUnboxedMintEqualityOp(FlowGraphCompiler* compiler,
const LocationSummary& locs,
Token::Kind kind,
BranchInstr* branch) {
ASSERT(Token::IsEqualityOperator(kind));
XmmRegister left = locs.in(0).fpu_reg();
XmmRegister right = locs.in(1).fpu_reg();
Register temp = locs.temp(0).reg();
__ movaps(XMM0, left);
__ pcmpeqq(XMM0, right);
__ movd(temp, XMM0);
Condition true_condition = TokenKindToMintCondition(kind);
__ cmpl(temp, Immediate(-1));
if (branch != NULL) {
branch->EmitBranchOnCondition(compiler, true_condition);
} else {
Register result = locs.out().reg();
Label done, is_true;
__ j(true_condition, &is_true);
__ LoadObject(result, Bool::False());
__ jmp(&done);
__ Bind(&is_true);
__ LoadObject(result, Bool::True());
__ Bind(&done);
}
}
static void EmitUnboxedMintComparisonOp(FlowGraphCompiler* compiler,
const LocationSummary& locs,
Token::Kind kind,
BranchInstr* branch) {
XmmRegister left = locs.in(0).fpu_reg();
XmmRegister right = locs.in(1).fpu_reg();
Register left_tmp = locs.temp(0).reg();
Register right_tmp = locs.temp(1).reg();
Register result = branch == NULL ? locs.out().reg() : kNoRegister;
Condition hi_cond = OVERFLOW, lo_cond = OVERFLOW;
switch (kind) {
case Token::kLT:
hi_cond = LESS;
lo_cond = BELOW;
break;
case Token::kGT:
hi_cond = GREATER;
lo_cond = ABOVE;
break;
case Token::kLTE:
hi_cond = LESS;
lo_cond = BELOW_EQUAL;
break;
case Token::kGTE:
hi_cond = GREATER;
lo_cond = ABOVE_EQUAL;
break;
default:
break;
}
ASSERT(hi_cond != OVERFLOW && lo_cond != OVERFLOW);
Label is_true, is_false;
// Compare upper halves first.
__ pextrd(left_tmp, left, Immediate(1));
__ pextrd(right_tmp, right, Immediate(1));
__ cmpl(left_tmp, right_tmp);
if (branch != NULL) {
__ j(hi_cond, compiler->GetJumpLabel(branch->true_successor()));
__ j(FlowGraphCompiler::FlipCondition(hi_cond),
compiler->GetJumpLabel(branch->false_successor()));
} else {
__ j(hi_cond, &is_true);
__ j(FlowGraphCompiler::FlipCondition(hi_cond), &is_false);
}
// If upper is equal, compare lower half.
__ pextrd(left_tmp, left, Immediate(0));
__ pextrd(right_tmp, right, Immediate(0));
__ cmpl(left_tmp, right_tmp);
if (branch != NULL) {
branch->EmitBranchOnCondition(compiler, lo_cond);
} else {
Label done;
__ j(lo_cond, &is_true);
__ Bind(&is_false);
__ LoadObject(result, Bool::False());
__ jmp(&done);
__ Bind(&is_true);
__ LoadObject(result, Bool::True());
__ Bind(&done);
}
}
static Condition TokenKindToDoubleCondition(Token::Kind kind) {
switch (kind) {
case Token::kEQ: return EQUAL;
case Token::kNE: return NOT_EQUAL;
case Token::kLT: return BELOW;
case Token::kGT: return ABOVE;
case Token::kLTE: return BELOW_EQUAL;
case Token::kGTE: return ABOVE_EQUAL;
default:
UNREACHABLE();
return OVERFLOW;
}
}
static void EmitDoubleComparisonOp(FlowGraphCompiler* compiler,
const LocationSummary& locs,
Token::Kind kind,
BranchInstr* branch) {
XmmRegister left = locs.in(0).fpu_reg();
XmmRegister right = locs.in(1).fpu_reg();
Condition true_condition = TokenKindToDoubleCondition(kind);
if (branch != NULL) {
compiler->EmitDoubleCompareBranch(
true_condition, left, right, branch);
} else {
compiler->EmitDoubleCompareBool(
true_condition, left, right, locs.out().reg());
}
}
void EqualityCompareInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
ASSERT((kind() == Token::kNE) || (kind() == Token::kEQ));
BranchInstr* kNoBranch = NULL;
if (receiver_class_id() == kSmiCid) {
EmitSmiComparisonOp(compiler, *locs(), kind(), kNoBranch);
return;
}
if (receiver_class_id() == kMintCid) {
EmitUnboxedMintEqualityOp(compiler, *locs(), kind(), kNoBranch);
return;
}
if (receiver_class_id() == kDoubleCid) {
EmitDoubleComparisonOp(compiler, *locs(), kind(), kNoBranch);
return;
}
const bool is_checked_strict_equal =
HasICData() && ic_data()->AllTargetsHaveSameOwner(kInstanceCid);
if (is_checked_strict_equal) {
EmitCheckedStrictEqual(compiler, *ic_data(), *locs(), kind(), kNoBranch,
deopt_id());
return;
}
if (IsPolymorphic()) {
EmitGenericEqualityCompare(compiler, locs(), kind(), kNoBranch, *ic_data(),
deopt_id(), token_pos());
return;
}
Register left = locs()->in(0).reg();
Register right = locs()->in(1).reg();
__ pushl(left);
__ pushl(right);
EmitEqualityAsInstanceCall(compiler,
deopt_id(),
token_pos(),
kind(),
locs(),
*ic_data());
ASSERT(locs()->out().reg() == EAX);
}
void EqualityCompareInstr::EmitBranchCode(FlowGraphCompiler* compiler,
BranchInstr* branch) {
ASSERT((kind() == Token::kNE) || (kind() == Token::kEQ));
if (receiver_class_id() == kSmiCid) {
// Deoptimizes if both arguments not Smi.
EmitSmiComparisonOp(compiler, *locs(), kind(), branch);
return;
}
if (receiver_class_id() == kMintCid) {
EmitUnboxedMintEqualityOp(compiler, *locs(), kind(), branch);
return;
}
if (receiver_class_id() == kDoubleCid) {
EmitDoubleComparisonOp(compiler, *locs(), kind(), branch);
return;
}
const bool is_checked_strict_equal =
HasICData() && ic_data()->AllTargetsHaveSameOwner(kInstanceCid);
if (is_checked_strict_equal) {
EmitCheckedStrictEqual(compiler, *ic_data(), *locs(), kind(), branch,
deopt_id());
return;
}
if (IsPolymorphic()) {
EmitGenericEqualityCompare(compiler, locs(), kind(), branch, *ic_data(),
deopt_id(), token_pos());
return;
}
Register left = locs()->in(0).reg();
Register right = locs()->in(1).reg();
__ pushl(left);
__ pushl(right);
EmitEqualityAsInstanceCall(compiler,
deopt_id(),
token_pos(),
Token::kEQ, // kNE reverse occurs at branch.
locs(),
*ic_data());
if (branch->is_checked()) {
EmitAssertBoolean(EAX, token_pos(), deopt_id(), locs(), compiler);
}
Condition branch_condition = (kind() == Token::kNE) ? NOT_EQUAL : EQUAL;
__ CompareObject(EAX, Bool::True());
branch->EmitBranchOnCondition(compiler, branch_condition);
}
LocationSummary* RelationalOpInstr::MakeLocationSummary() const {
const intptr_t kNumInputs = 2;
const intptr_t kNumTemps = 0;
if (operands_class_id() == kMintCid) {
const intptr_t kNumTemps = 2;
LocationSummary* locs =
new LocationSummary(kNumInputs, kNumTemps, LocationSummary::kNoCall);
locs->set_in(0, Location::RequiresFpuRegister());
locs->set_in(1, Location::RequiresFpuRegister());
locs->set_temp(0, Location::RequiresRegister());
locs->set_temp(1, Location::RequiresRegister());
locs->set_out(Location::RequiresRegister());
return locs;
}
if (operands_class_id() == kDoubleCid) {
LocationSummary* summary =
new LocationSummary(kNumInputs, kNumTemps, LocationSummary::kNoCall);
summary->set_in(0, Location::RequiresFpuRegister());
summary->set_in(1, Location::RequiresFpuRegister());
summary->set_out(Location::RequiresRegister());
return summary;
} else if (operands_class_id() == kSmiCid) {
LocationSummary* summary =
new LocationSummary(kNumInputs, kNumTemps, LocationSummary::kNoCall);
summary->set_in(0, Location::RegisterOrConstant(left()));
// Only one input can be a constant operand. The case of two constant
// operands should be handled by constant propagation.
summary->set_in(1, summary->in(0).IsConstant()
? Location::RequiresRegister()
: Location::RegisterOrConstant(right()));
summary->set_out(Location::RequiresRegister());
return summary;
}
LocationSummary* locs =
new LocationSummary(kNumInputs, kNumTemps, LocationSummary::kCall);
// Pick arbitrary fixed input registers because this is a call.
locs->set_in(0, Location::RegisterLocation(EAX));
locs->set_in(1, Location::RegisterLocation(ECX));
locs->set_out(Location::RegisterLocation(EAX));
return locs;
}
void RelationalOpInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
if (operands_class_id() == kSmiCid) {
EmitSmiComparisonOp(compiler, *locs(), kind(), NULL);
return;
}
if (operands_class_id() == kMintCid) {
EmitUnboxedMintComparisonOp(compiler, *locs(), kind(), NULL);
return;
}
if (operands_class_id() == kDoubleCid) {
EmitDoubleComparisonOp(compiler, *locs(), kind(), NULL);
return;
}
// Push arguments for the call.
// TODO(fschneider): Split this instruction into different types to avoid
// explicitly pushing arguments to the call here.
Register left = locs()->in(0).reg();
Register right = locs()->in(1).reg();
__ pushl(left);
__ pushl(right);
if (HasICData() && (ic_data()->NumberOfChecks() > 0)) {
Label* deopt = compiler->AddDeoptStub(deopt_id(), kDeoptRelationalOp);
// Load class into EDI. Since this is a call, any register except
// the fixed input registers would be ok.
ASSERT((left != EDI) && (right != EDI));
const intptr_t kNumArguments = 2;
LoadValueCid(compiler, EDI, left);
compiler->EmitTestAndCall(ICData::Handle(ic_data()->AsUnaryClassChecks()),
EDI, // Class id register.
kNumArguments,
Array::Handle(), // No named arguments.
deopt, // Deoptimize target.
deopt_id(),
token_pos(),
locs());
return;
}
const String& function_name =
String::ZoneHandle(Symbols::New(Token::Str(kind())));
if (!compiler->is_optimizing()) {
compiler->AddCurrentDescriptor(PcDescriptors::kDeopt,
deopt_id(),
token_pos());
}
const intptr_t kNumArguments = 2;
const intptr_t kNumArgsChecked = 2; // Type-feedback.
ICData& relational_ic_data = ICData::ZoneHandle(ic_data()->raw());
if (compiler->is_optimizing() && FLAG_propagate_ic_data) {
ASSERT(!ic_data()->IsNull());
if (ic_data()->NumberOfChecks() == 0) {
// IC call for reoptimization populates original ICData.
relational_ic_data = ic_data()->raw();
} else {
// Megamorphic call.
relational_ic_data = ic_data()->AsUnaryClassChecks();
}
} else {
relational_ic_data = ICData::New(compiler->parsed_function().function(),
function_name,
deopt_id(),
kNumArgsChecked);
}
compiler->GenerateInstanceCall(deopt_id(),
token_pos(),
kNumArguments,
Array::ZoneHandle(), // No optional arguments.
locs(),
relational_ic_data);
}
void RelationalOpInstr::EmitBranchCode(FlowGraphCompiler* compiler,
BranchInstr* branch) {
if (operands_class_id() == kSmiCid) {
EmitSmiComparisonOp(compiler, *locs(), kind(), branch);
return;
}
if (operands_class_id() == kMintCid) {
EmitUnboxedMintComparisonOp(compiler, *locs(), kind(), branch);
return;
}
if (operands_class_id() == kDoubleCid) {
EmitDoubleComparisonOp(compiler, *locs(), kind(), branch);
return;
}
EmitNativeCode(compiler);
__ CompareObject(EAX, Bool::True());
branch->EmitBranchOnCondition(compiler, EQUAL);
}
LocationSummary* NativeCallInstr::MakeLocationSummary() const {
const intptr_t kNumInputs = 0;
const intptr_t kNumTemps = 3;
LocationSummary* locs =
new LocationSummary(kNumInputs, kNumTemps, LocationSummary::kCall);
locs->set_temp(0, Location::RegisterLocation(EAX));
locs->set_temp(1, Location::RegisterLocation(ECX));
locs->set_temp(2, Location::RegisterLocation(EDX));
locs->set_out(Location::RegisterLocation(EAX));
return locs;
}
void NativeCallInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
ASSERT(locs()->temp(0).reg() == EAX);
ASSERT(locs()->temp(1).reg() == ECX);
ASSERT(locs()->temp(2).reg() == EDX);
Register result = locs()->out().reg();
// Push the result place holder initialized to NULL.
__ PushObject(Object::ZoneHandle());
// Pass a pointer to the first argument in EAX.
if (!function().HasOptionalParameters()) {
__ leal(EAX, Address(EBP, (kLastParamSlotIndex +
function().NumParameters() - 1) * kWordSize));
} else {
__ leal(EAX, Address(EBP, kFirstLocalSlotIndex * kWordSize));
}
__ movl(ECX, Immediate(reinterpret_cast<uword>(native_c_function())));
__ movl(EDX, Immediate(NativeArguments::ComputeArgcTag(function())));
compiler->GenerateCall(token_pos(),
&StubCode::CallNativeCFunctionLabel(),
PcDescriptors::kOther,
locs());
__ popl(result);
}
static bool CanBeImmediateIndex(Value* index, intptr_t cid) {
if (!index->definition()->IsConstant()) return false;
const Object& constant = index->definition()->AsConstant()->value();
if (!constant.IsSmi()) return false;
const Smi& smi_const = Smi::Cast(constant);
const intptr_t scale = FlowGraphCompiler::ElementSizeFor(cid);
const intptr_t data_offset = FlowGraphCompiler::DataOffsetFor(cid);
const int64_t disp = smi_const.AsInt64Value() * scale + data_offset;
return Utils::IsInt(32, disp);
}
LocationSummary* StringFromCharCodeInstr::MakeLocationSummary() const {
const intptr_t kNumInputs = 1;
const intptr_t kNumTemps = 0;
LocationSummary* locs =
new LocationSummary(kNumInputs, kNumTemps, LocationSummary::kNoCall);
// TODO(fschneider): Allow immediate operands for the char code.
locs->set_in(0, Location::RequiresRegister());
locs->set_out(Location::RequiresRegister());
return locs;
}
void StringFromCharCodeInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
Register char_code = locs()->in(0).reg();
Register result = locs()->out().reg();
__ movl(result,
Immediate(reinterpret_cast<uword>(Symbols::PredefinedAddress())));
__ movl(result, Address(result,
char_code,
TIMES_HALF_WORD_SIZE, // Char code is a smi.
Symbols::kNullCharCodeSymbolOffset * kWordSize));
}
LocationSummary* LoadUntaggedInstr::MakeLocationSummary() const {
const intptr_t kNumInputs = 1;
const intptr_t kNumTemps = 0;
LocationSummary* locs =
new LocationSummary(kNumInputs, kNumTemps, LocationSummary::kNoCall);
locs->set_in(0, Location::RequiresRegister());
locs->set_out(Location::RequiresRegister());
return locs;
}
void LoadUntaggedInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
Register object = locs()->in(0).reg();
Register result = locs()->out().reg();
__ movl(result, FieldAddress(object, offset()));
}
CompileType LoadIndexedInstr::ComputeType() const {
switch (class_id_) {
case kArrayCid:
case kImmutableArrayCid:
return CompileType::Dynamic();
case kTypedDataFloat32ArrayCid:
case kTypedDataFloat64ArrayCid:
return CompileType::FromCid(kDoubleCid);
case kTypedDataFloat32x4ArrayCid:
return CompileType::FromCid(kFloat32x4Cid);
case kTypedDataInt8ArrayCid:
case kTypedDataUint8ArrayCid:
case kTypedDataUint8ClampedArrayCid:
case kExternalTypedDataUint8ArrayCid:
case kExternalTypedDataUint8ClampedArrayCid:
case kTypedDataInt16ArrayCid:
case kTypedDataUint16ArrayCid:
case kOneByteStringCid:
case kTwoByteStringCid:
return CompileType::FromCid(kSmiCid);
case kTypedDataInt32ArrayCid:
case kTypedDataUint32ArrayCid:
// Result can be Smi or Mint when boxed.
// Instruction can deoptimize if we optimistically assumed that the result
// fits into Smi.
return CanDeoptimize() ? CompileType::FromCid(kSmiCid)
: CompileType::Int();
default:
UNIMPLEMENTED();
return CompileType::Dynamic();
}
}
Representation LoadIndexedInstr::representation() const {
switch (class_id_) {
case kArrayCid:
case kImmutableArrayCid:
case kTypedDataInt8ArrayCid:
case kTypedDataUint8ArrayCid:
case kTypedDataUint8ClampedArrayCid:
case kExternalTypedDataUint8ArrayCid:
case kExternalTypedDataUint8ClampedArrayCid:
case kTypedDataInt16ArrayCid:
case kTypedDataUint16ArrayCid:
case kOneByteStringCid:
case kTwoByteStringCid:
return kTagged;
case kTypedDataInt32ArrayCid:
case kTypedDataUint32ArrayCid:
// Instruction can deoptimize if we optimistically assumed that the result
// fits into Smi.
return CanDeoptimize() ? kTagged : kUnboxedMint;
case kTypedDataFloat32ArrayCid:
case kTypedDataFloat64ArrayCid:
return kUnboxedDouble;
case kTypedDataFloat32x4ArrayCid:
return kUnboxedFloat32x4;
default:
UNIMPLEMENTED();
return kTagged;
}
}
LocationSummary* LoadIndexedInstr::MakeLocationSummary() const {
const intptr_t kNumInputs = 2;
const intptr_t kNumTemps = 0;
LocationSummary* locs =
new LocationSummary(kNumInputs, kNumTemps, LocationSummary::kNoCall);
locs->set_in(0, Location::RequiresRegister());
// The smi index is either untagged (element size == 1), or it is left smi
// tagged (for all element sizes > 1).
if (index_scale() == 1) {
locs->set_in(1, CanBeImmediateIndex(index(), class_id())
? Location::Constant(
index()->definition()->AsConstant()->value())
: Location::WritableRegister());
} else {
locs->set_in(1, CanBeImmediateIndex(index(), class_id())
? Location::Constant(
index()->definition()->AsConstant()->value())
: Location::RequiresRegister());
}
if (representation() == kUnboxedDouble) {
locs->set_out(Location::RequiresFpuRegister());
} else {
locs->set_out(Location::RequiresRegister());
}
return locs;
}
void LoadIndexedInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
Register array = locs()->in(0).reg();
Location index = locs()->in(1);
Address element_address(kNoRegister, 0);
if (IsExternal()) {
element_address = index.IsRegister()
? FlowGraphCompiler::ExternalElementAddressForRegIndex(
index_scale(), array, index.reg())
: FlowGraphCompiler::ExternalElementAddressForIntIndex(
index_scale(), array, Smi::Cast(index.constant()).Value());
} else {
ASSERT(this->array()->definition()->representation() == kTagged);
element_address = index.IsRegister()
? FlowGraphCompiler::ElementAddressForRegIndex(
class_id(), index_scale(), array, index.reg())
: FlowGraphCompiler::ElementAddressForIntIndex(
class_id(), index_scale(), array,
Smi::Cast(index.constant()).Value());
}
if ((representation() == kUnboxedDouble) ||
(representation() == kUnboxedMint) ||
(representation() == kUnboxedFloat32x4)) {
XmmRegister result = locs()->out().fpu_reg();
if ((index_scale() == 1) && index.IsRegister()) {
__ SmiUntag(index.reg());
}
switch (class_id()) {
case kTypedDataInt32ArrayCid:
__ movss(result, element_address);
__ pmovsxdq(result, result);
break;
case kTypedDataUint32ArrayCid:
__ xorpd(result, result);
__ movss(result, element_address);
break;
case kTypedDataFloat32ArrayCid:
// Load single precision float and promote to double.
__ movss(result, element_address);
__ cvtss2sd(result, locs()->out().fpu_reg());
break;
case kTypedDataFloat64ArrayCid:
__ movsd(result, element_address);
break;
case kTypedDataFloat32x4ArrayCid:
__ movups(result, element_address);
break;
}
return;
}
Register result = locs()->out().reg();
if ((index_scale() == 1) && index.IsRegister()) {
__ SmiUntag(index.reg());
}
switch (class_id()) {
case kTypedDataInt8ArrayCid:
ASSERT(index_scale() == 1);
__ movsxb(result, element_address);
__ SmiTag(result);
break;
case kTypedDataUint8ArrayCid:
case kTypedDataUint8ClampedArrayCid:
case kExternalTypedDataUint8ArrayCid:
case kExternalTypedDataUint8ClampedArrayCid:
case kOneByteStringCid:
ASSERT(index_scale() == 1);
__ movzxb(result, element_address);
__ SmiTag(result);
break;
case kTypedDataInt16ArrayCid:
__ movsxw(result, element_address);
__ SmiTag(result);
break;
case kTypedDataUint16ArrayCid:
case kTwoByteStringCid:
__ movzxw(result, element_address);
__ SmiTag(result);
break;
case kTypedDataInt32ArrayCid: {
Label* deopt = compiler->AddDeoptStub(deopt_id(), kDeoptInt32Load);
__ movl(result, element_address);
// Verify that the signed value in 'result' can fit inside a Smi.
__ cmpl(result, Immediate(0xC0000000));
__ j(NEGATIVE, deopt);
__ SmiTag(result);
}
break;
case kTypedDataUint32ArrayCid: {
Label* deopt = compiler->AddDeoptStub(deopt_id(), kDeoptUint32Load);
__ movl(result, element_address);
// Verify that the unsigned value in 'result' can fit inside a Smi.
__ testl(result, Immediate(0xC0000000));
__ j(NOT_ZERO, deopt);
__ SmiTag(result);
}
break;
default:
ASSERT((class_id() == kArrayCid) || (class_id() == kImmutableArrayCid));
__ movl(result, element_address);
break;
}
}
Representation StoreIndexedInstr::RequiredInputRepresentation(
intptr_t idx) const {
// Array can be a Dart object or a pointer to external data.
if (idx == 0) return kNoRepresentation; // Flexible input representation.
if (idx == 1) return kTagged; // Index is a smi.
ASSERT(idx == 2);
switch (class_id_) {
case kArrayCid:
case kTypedDataInt8ArrayCid:
case kTypedDataUint8ArrayCid:
case kExternalTypedDataUint8ArrayCid:
case kTypedDataUint8ClampedArrayCid:
case kExternalTypedDataUint8ClampedArrayCid:
case kTypedDataInt16ArrayCid:
case kTypedDataUint16ArrayCid:
return kTagged;
case kTypedDataInt32ArrayCid:
case kTypedDataUint32ArrayCid:
return value()->IsSmiValue() ? kTagged : kUnboxedMint;
case kTypedDataFloat32ArrayCid:
case kTypedDataFloat64ArrayCid:
return kUnboxedDouble;
case kTypedDataFloat32x4ArrayCid:
return kUnboxedFloat32x4;
default:
UNIMPLEMENTED();
return kTagged;
}
}
LocationSummary* StoreIndexedInstr::MakeLocationSummary() const {
const intptr_t kNumInputs = 3;
const intptr_t kNumTemps = 0;
LocationSummary* locs =
new LocationSummary(kNumInputs, kNumTemps, LocationSummary::kNoCall);
locs->set_in(0, Location::RequiresRegister());
// The smi index is either untagged (element size == 1), or it is left smi
// tagged (for all element sizes > 1).
if (index_scale() == 1) {
locs->set_in(1, CanBeImmediateIndex(index(), class_id())
? Location::Constant(
index()->definition()->AsConstant()->value())
: Location::WritableRegister());
} else {
locs->set_in(1, CanBeImmediateIndex(index(), class_id())
? Location::Constant(
index()->definition()->AsConstant()->value())
: Location::RequiresRegister());
}
switch (class_id()) {
case kArrayCid:
locs->set_in(2, ShouldEmitStoreBarrier()
? Location::WritableRegister()
: Location::RegisterOrConstant(value()));
break;
case kExternalTypedDataUint8ArrayCid:
case kExternalTypedDataUint8ClampedArrayCid:
case kTypedDataInt8ArrayCid:
case kTypedDataUint8ArrayCid:
case kTypedDataUint8ClampedArrayCid:
// TODO(fschneider): Add location constraint for byte registers (EAX,
// EBX, ECX, EDX) instead of using a fixed register.
locs->set_in(2, Location::FixedRegisterOrSmiConstant(value(), EAX));
break;
case kTypedDataInt16ArrayCid:
case kTypedDataUint16ArrayCid:
// Writable register because the value must be untagged before storing.
locs->set_in(2, Location::WritableRegister());
break;
case kTypedDataInt32ArrayCid:
case kTypedDataUint32ArrayCid:
// Mints are stored in XMM registers. For smis, use a writable register
// because the value must be untagged before storing.
locs->set_in(2, value()->IsSmiValue()
? Location::WritableRegister()
: Location::RequiresFpuRegister());
break;
case kTypedDataFloat32ArrayCid:
// Need temp register for float-to-double conversion.
locs->AddTemp(Location::RequiresFpuRegister());
// Fall through.
case kTypedDataFloat64ArrayCid:
// TODO(srdjan): Support Float64 constants.
locs->set_in(2, Location::RequiresFpuRegister());
break;
case kTypedDataFloat32x4ArrayCid:
locs->set_in(2, Location::RequiresFpuRegister());
break;
default:
UNREACHABLE();
return NULL;
}
return locs;
}
void StoreIndexedInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
Register array = locs()->in(0).reg();
Location index = locs()->in(1);
Address element_address(kNoRegister, 0);
if (IsExternal()) {
element_address = index.IsRegister()
? FlowGraphCompiler::ExternalElementAddressForRegIndex(
index_scale(), array, index.reg())
: FlowGraphCompiler::ExternalElementAddressForIntIndex(
index_scale(), array, Smi::Cast(index.constant()).Value());
} else {
ASSERT(this->array()->definition()->representation() == kTagged);
element_address = index.IsRegister()
? FlowGraphCompiler::ElementAddressForRegIndex(
class_id(), index_scale(), array, index.reg())
: FlowGraphCompiler::ElementAddressForIntIndex(
class_id(), index_scale(), array,
Smi::Cast(index.constant()).Value());
}
if ((index_scale() == 1) && index.IsRegister()) {
__ SmiUntag(index.reg());
}
switch (class_id()) {
case kArrayCid:
if (ShouldEmitStoreBarrier()) {
Register value = locs()->in(2).reg();
__ StoreIntoObject(array, element_address, value);
} else if (locs()->in(2).IsConstant()) {
const Object& constant = locs()->in(2).constant();
__ StoreIntoObjectNoBarrier(array, element_address, constant);
} else {
Register value = locs()->in(2).reg();
__ StoreIntoObjectNoBarrier(array, element_address, value);
}
break;
case kTypedDataInt8ArrayCid:
case kTypedDataUint8ArrayCid:
case kExternalTypedDataUint8ArrayCid:
if (locs()->in(2).IsConstant()) {
const Smi& constant = Smi::Cast(locs()->in(2).constant());
__ movb(element_address,
Immediate(static_cast<int8_t>(constant.Value())));
} else {
ASSERT(locs()->in(2).reg() == EAX);
__ SmiUntag(EAX);
__ movb(element_address, AL);
}
break;
case kTypedDataUint8ClampedArrayCid:
case kExternalTypedDataUint8ClampedArrayCid: {
if (locs()->in(2).IsConstant()) {
const Smi& constant = Smi::Cast(locs()->in(2).constant());
intptr_t value = constant.Value();
// Clamp to 0x0 or 0xFF respectively.
if (value > 0xFF) {
value = 0xFF;
} else if (value < 0) {
value = 0;
}
__ movb(element_address,
Immediate(static_cast<int8_t>(value)));
} else {
ASSERT(locs()->in(2).reg() == EAX);
Label store_value, store_0xff;
__ SmiUntag(EAX);
__ cmpl(EAX, Immediate(0xFF));
__ j(BELOW_EQUAL, &store_value, Assembler::kNearJump);
// Clamp to 0x0 or 0xFF respectively.
__ j(GREATER, &store_0xff);
__ xorl(EAX, EAX);
__ jmp(&store_value, Assembler::kNearJump);
__ Bind(&store_0xff);
__ movl(EAX, Immediate(0xFF));
__ Bind(&store_value);
__ movb(element_address, AL);
}
break;
}
case kTypedDataInt16ArrayCid:
case kTypedDataUint16ArrayCid: {
Register value = locs()->in(2).reg();
__ SmiUntag(value);
__ movw(element_address, value);
break;
}
case kTypedDataInt32ArrayCid:
case kTypedDataUint32ArrayCid:
if (value()->IsSmiValue()) {
ASSERT(RequiredInputRepresentation(2) == kTagged);
Register value = locs()->in(2).reg();
__ SmiUntag(value);
__ movl(element_address, value);
} else {
ASSERT(RequiredInputRepresentation(2) == kUnboxedMint);
__ movss(element_address, locs()->in(2).fpu_reg());
}
break;
case kTypedDataFloat32ArrayCid:
// Convert to single precision.
__ cvtsd2ss(locs()->temp(0).fpu_reg(), locs()->in(2).fpu_reg());
// Store.
__ movss(element_address, locs()->temp(0).fpu_reg());
break;
case kTypedDataFloat64ArrayCid:
__ movsd(element_address, locs()->in(2).fpu_reg());
break;
case kTypedDataFloat32x4ArrayCid:
__ movups(element_address, locs()->in(2).fpu_reg());
break;
default:
UNREACHABLE();
}
}
LocationSummary* GuardFieldInstr::MakeLocationSummary() const {
const intptr_t kNumInputs = 1;
LocationSummary* summary =
new LocationSummary(kNumInputs, 0, LocationSummary::kNoCall);
summary->set_in(0, Location::RequiresRegister());
if ((value()->Type()->ToCid() == kDynamicCid) &&
(field().guarded_cid() != kSmiCid)) {
summary->AddTemp(Location::RequiresRegister());
}
if (field().guarded_cid() == kIllegalCid) {
summary->AddTemp(Location::RequiresRegister());
}
return summary;
}
void GuardFieldInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
const intptr_t field_cid = field().guarded_cid();
const intptr_t nullability = field().is_nullable() ? kNullCid : kIllegalCid;
if (field_cid == kDynamicCid) {
ASSERT(!compiler->is_optimizing());
return; // Nothing to emit.
}
const intptr_t value_cid = value()->Type()->ToCid();
Register value_reg = locs()->in(0).reg();
Register value_cid_reg = ((value_cid == kDynamicCid) &&
(field_cid != kSmiCid)) ? locs()->temp(0).reg() : kNoRegister;
Register field_reg = (field_cid == kIllegalCid) ?
locs()->temp(locs()->temp_count() - 1).reg() : kNoRegister;
Label ok, fail_label;
Label* deopt = compiler->is_optimizing() ?
compiler->AddDeoptStub(deopt_id(), kDeoptGuardField) : NULL;
Label* fail = (deopt != NULL) ? deopt : &fail_label;
const bool ok_is_fall_through = (deopt != NULL);
if (!compiler->is_optimizing() || (field_cid == kIllegalCid)) {
if (!compiler->is_optimizing()) {
// Currently we can't have different location summaries for optimized
// and non-optimized code. So instead we manually pick up a register
// that is known to be free because we know how non-optimizing compiler
// allocates registers.
field_reg = EBX;
ASSERT((field_reg != value_reg) && (field_reg != value_cid_reg));
}
__ LoadObject(field_reg, Field::ZoneHandle(field().raw()));
FieldAddress field_cid_operand(field_reg, Field::guarded_cid_offset());
FieldAddress field_nullability_operand(
field_reg, Field::is_nullable_offset());
if (value_cid == kDynamicCid) {
if (value_cid_reg == kNoRegister) {
ASSERT(!compiler->is_optimizing());
value_cid_reg = EDX;
ASSERT((value_cid_reg != value_reg) && (field_reg != value_cid_reg));
}
LoadValueCid(compiler, value_cid_reg, value_reg);
__ cmpl(value_cid_reg, field_cid_operand);
__ j(EQUAL, &ok);
__ cmpl(value_cid_reg, field_nullability_operand);
} else if (value_cid == kNullCid) {
__ cmpl(field_nullability_operand, Immediate(value_cid));
} else {
__ cmpl(field_cid_operand, Immediate(value_cid));
}
__ j(EQUAL, &ok);
__ cmpl(field_cid_operand, Immediate(kIllegalCid));
__ j(NOT_EQUAL, fail);
if (value_cid == kDynamicCid) {
__ movl(field_cid_operand, value_cid_reg);
__ movl(field_nullability_operand, value_cid_reg);
} else {
__ movl(field_cid_operand, Immediate(value_cid));
__ movl(field_nullability_operand, Immediate(value_cid));
}
if (!ok_is_fall_through) {
__ jmp(&ok);
}
} else {
if (value_cid == kDynamicCid) {
// Field's guarded class id is fixed by value's class id is not known.
__ testl(value_reg, Immediate(kSmiTagMask));
if (field_cid != kSmiCid) {
__ j(ZERO, fail);
__ LoadClassId(value_cid_reg, value_reg);
__ cmpl(value_cid_reg, Immediate(field_cid));
}
if (field().is_nullable() && (field_cid != kNullCid)) {
__ j(EQUAL, &ok);
const Immediate& raw_null =
Immediate(reinterpret_cast<intptr_t>(Object::null()));
__ cmpl(value_reg, raw_null);
}
if (ok_is_fall_through) {
__ j(NOT_EQUAL, fail);
} else {
__ j(EQUAL, &ok);
}
} else {
// Both value's and field's class id is known.
if ((value_cid != field_cid) && (value_cid != nullability)) {
if (ok_is_fall_through) {
__ jmp(fail);
}
} else {
// Nothing to emit.
ASSERT(!compiler->is_optimizing());
return;
}
}
}
if (deopt == NULL) {
ASSERT(!compiler->is_optimizing());
__ Bind(fail);
__ cmpl(FieldAddress(field_reg, Field::guarded_cid_offset()),
Immediate(kDynamicCid));
__ j(EQUAL, &ok);
__ pushl(field_reg);
__ pushl(value_reg);
__ CallRuntime(kUpdateFieldCidRuntimeEntry);
__ Drop(2); // Drop the field and the value.
}
__ Bind(&ok);
}
LocationSummary* StoreInstanceFieldInstr::MakeLocationSummary() const {
const intptr_t kNumInputs = 2;
const intptr_t num_temps = 0;
LocationSummary* summary =
new LocationSummary(kNumInputs, num_temps, LocationSummary::kNoCall);
summary->set_in(0, Location::RequiresRegister());
summary->set_in(1, ShouldEmitStoreBarrier()
? Location::WritableRegister()
: Location::RegisterOrConstant(value()));
return summary;
}
void StoreInstanceFieldInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
Register instance_reg = locs()->in(0).reg();
if (ShouldEmitStoreBarrier()) {
Register value_reg = locs()->in(1).reg();
__ StoreIntoObject(instance_reg,
FieldAddress(instance_reg, field().Offset()),
value_reg,
CanValueBeSmi());
} else {
if (locs()->in(1).IsConstant()) {
__ StoreIntoObjectNoBarrier(
instance_reg,
FieldAddress(instance_reg, field().Offset()),
locs()->in(1).constant());
} else {
Register value_reg = locs()->in(1).reg();
__ StoreIntoObjectNoBarrier(instance_reg,
FieldAddress(instance_reg, field().Offset()), value_reg);
}
}
}
LocationSummary* LoadStaticFieldInstr::MakeLocationSummary() const {
return LocationSummary::Make(0,
Location::RequiresRegister(),
LocationSummary::kNoCall);
}
void LoadStaticFieldInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
Register result = locs()->out().reg();
__ LoadObject(result, field());
__ movl(result, FieldAddress(result, Field::value_offset()));
}
LocationSummary* StoreStaticFieldInstr::MakeLocationSummary() const {
LocationSummary* locs = new LocationSummary(1, 1, LocationSummary::kNoCall);
locs->set_in(0, value()->NeedsStoreBuffer() ? Location::WritableRegister()
: Location::RequiresRegister());
locs->set_temp(0, Location::RequiresRegister());
return locs;
}
void StoreStaticFieldInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
Register value = locs()->in(0).reg();
Register temp = locs()->temp(0).reg();
__ LoadObject(temp, field());
if (this->value()->NeedsStoreBuffer()) {
__ StoreIntoObject(temp,
FieldAddress(temp, Field::value_offset()), value, CanValueBeSmi());
} else {
__ StoreIntoObjectNoBarrier(
temp, FieldAddress(temp, Field::value_offset()), value);
}
}
LocationSummary* InstanceOfInstr::MakeLocationSummary() const {
const intptr_t kNumInputs = 3;
const intptr_t kNumTemps = 0;
LocationSummary* summary =
new LocationSummary(kNumInputs, kNumTemps, LocationSummary::kCall);
summary->set_in(0, Location::RegisterLocation(EAX));
summary->set_in(1, Location::RegisterLocation(ECX));
summary->set_in(2, Location::RegisterLocation(EDX));
summary->set_out(Location::RegisterLocation(EAX));
return summary;
}
void InstanceOfInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
ASSERT(locs()->in(0).reg() == EAX); // Value.
ASSERT(locs()->in(1).reg() == ECX); // Instantiator.
ASSERT(locs()->in(2).reg() == EDX); // Instantiator type arguments.
compiler->GenerateInstanceOf(token_pos(),
deopt_id(),
type(),
negate_result(),
locs());
ASSERT(locs()->out().reg() == EAX);
}
LocationSummary* CreateArrayInstr::MakeLocationSummary() const {
const intptr_t kNumInputs = 1;
const intptr_t kNumTemps = 0;
LocationSummary* locs =
new LocationSummary(kNumInputs, kNumTemps, LocationSummary::kCall);
locs->set_in(0, Location::RegisterLocation(ECX));
locs->set_out(Location::RegisterLocation(EAX));
return locs;
}
void CreateArrayInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
// Allocate the array. EDX = length, ECX = element type.
ASSERT(locs()->in(0).reg() == ECX);
__ movl(EDX, Immediate(Smi::RawValue(num_elements())));
compiler->GenerateCall(token_pos(),
&StubCode::AllocateArrayLabel(),
PcDescriptors::kOther,
locs());
ASSERT(locs()->out().reg() == EAX);
}
LocationSummary*
AllocateObjectWithBoundsCheckInstr::MakeLocationSummary() const {
const intptr_t kNumInputs = 2;
const intptr_t kNumTemps = 0;
LocationSummary* locs =
new LocationSummary(kNumInputs, kNumTemps, LocationSummary::kCall);
locs->set_in(0, Location::RegisterLocation(EAX));
locs->set_in(1, Location::RegisterLocation(ECX));
locs->set_out(Location::RegisterLocation(EAX));
return locs;
}
void AllocateObjectWithBoundsCheckInstr::EmitNativeCode(
FlowGraphCompiler* compiler) {
const Class& cls = Class::ZoneHandle(constructor().Owner());
Register type_arguments = locs()->in(0).reg();
Register instantiator_type_arguments = locs()->in(1).reg();
Register result = locs()->out().reg();
// Push the result place holder initialized to NULL.
__ PushObject(Object::ZoneHandle());
__ PushObject(cls);
__ pushl(type_arguments);
__ pushl(instantiator_type_arguments);
compiler->GenerateCallRuntime(token_pos(),
deopt_id(),
kAllocateObjectWithBoundsCheckRuntimeEntry,
locs());
// Pop instantiator type arguments, type arguments, and class.
// source location.
__ Drop(3);
__ popl(result); // Pop new instance.
}
LocationSummary* LoadFieldInstr::MakeLocationSummary() const {
return LocationSummary::Make(1,
Location::RequiresRegister(),
LocationSummary::kNoCall);
}
void LoadFieldInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
Register instance_reg = locs()->in(0).reg();
Register result_reg = locs()->out().reg();
__ movl(result_reg, FieldAddress(instance_reg, offset_in_bytes()));
}
LocationSummary* InstantiateTypeArgumentsInstr::MakeLocationSummary() const {
const intptr_t kNumInputs = 1;
const intptr_t kNumTemps = 0;
LocationSummary* locs =
new LocationSummary(kNumInputs, kNumTemps, LocationSummary::kCall);
locs->set_in(0, Location::RegisterLocation(EAX));
locs->set_out(Location::RegisterLocation(EAX));
return locs;
}
void InstantiateTypeArgumentsInstr::EmitNativeCode(
FlowGraphCompiler* compiler) {
Register instantiator_reg = locs()->in(0).reg();
Register result_reg = locs()->out().reg();
// 'instantiator_reg' is the instantiator AbstractTypeArguments object
// (or null).
if (!type_arguments().IsUninstantiatedIdentity()) {
// If the instantiator is null and if the type argument vector
// instantiated from null becomes a vector of dynamic, then use null as
// the type arguments.
Label type_arguments_instantiated;
const intptr_t len = type_arguments().Length();
if (type_arguments().IsRawInstantiatedRaw(len)) {
const Immediate& raw_null =
Immediate(reinterpret_cast<intptr_t>(Object::null()));
__ cmpl(instantiator_reg, raw_null);
__ j(EQUAL, &type_arguments_instantiated, Assembler::kNearJump);
}
// Instantiate non-null type arguments.
// A runtime call to instantiate the type arguments is required.
__ PushObject(Object::ZoneHandle()); // Make room for the result.
__ PushObject(type_arguments());
__ pushl(instantiator_reg); // Push instantiator type arguments.
compiler->GenerateCallRuntime(token_pos(),
deopt_id(),
kInstantiateTypeArgumentsRuntimeEntry,
locs());
__ Drop(2); // Drop instantiator and uninstantiated type arguments.
__ popl(result_reg); // Pop instantiated type arguments.
__ Bind(&type_arguments_instantiated);
}
ASSERT(instantiator_reg == result_reg);
// 'result_reg': Instantiated type arguments.
}
LocationSummary*
ExtractConstructorTypeArgumentsInstr::MakeLocationSummary() const {
const intptr_t kNumInputs = 1;
const intptr_t kNumTemps = 0;
LocationSummary* locs =
new LocationSummary(kNumInputs, kNumTemps, LocationSummary::kNoCall);
locs->set_in(0, Location::RequiresRegister());
locs->set_out(Location::SameAsFirstInput());
return locs;
}
void ExtractConstructorTypeArgumentsInstr::EmitNativeCode(
FlowGraphCompiler* compiler) {
Register instantiator_reg = locs()->in(0).reg();
Register result_reg = locs()->out().reg();
ASSERT(instantiator_reg == result_reg);
// instantiator_reg is the instantiator type argument vector, i.e. an
// AbstractTypeArguments object (or null).
if (!type_arguments().IsUninstantiatedIdentity()) {
// If the instantiator is null and if the type argument vector
// instantiated from null becomes a vector of dynamic, then use null as
// the type arguments.
Label type_arguments_instantiated;
const intptr_t len = type_arguments().Length();
if (type_arguments().IsRawInstantiatedRaw(len)) {
const Immediate& raw_null =
Immediate(reinterpret_cast<intptr_t>(Object::null()));
__ cmpl(instantiator_reg, raw_null);
__ j(EQUAL, &type_arguments_instantiated, Assembler::kNearJump);
}
// Instantiate non-null type arguments.
// In the non-factory case, we rely on the allocation stub to
// instantiate the type arguments.
__ LoadObject(result_reg, type_arguments());
// result_reg: uninstantiated type arguments.
__ Bind(&type_arguments_instantiated);
}
ASSERT(instantiator_reg == result_reg);
// result_reg: uninstantiated or instantiated type arguments.
}
LocationSummary*
ExtractConstructorInstantiatorInstr::MakeLocationSummary() const {
const intptr_t kNumInputs = 1;
const intptr_t kNumTemps = 0;
LocationSummary* locs =
new LocationSummary(kNumInputs, kNumTemps, LocationSummary::kNoCall);
locs->set_in(0, Location::RequiresRegister());
locs->set_out(Location::SameAsFirstInput());
return locs;
}
void ExtractConstructorInstantiatorInstr::EmitNativeCode(
FlowGraphCompiler* compiler) {
Register instantiator_reg = locs()->in(0).reg();
ASSERT(locs()->out().reg() == instantiator_reg);
// instantiator_reg is the instantiator AbstractTypeArguments object
// (or null).
if (type_arguments().IsUninstantiatedIdentity()) {
// The instantiator was used in VisitExtractConstructorTypeArguments as the
// instantiated type arguments, no proper instantiator needed.
__ movl(instantiator_reg,
Immediate(Smi::RawValue(StubCode::kNoInstantiator)));
} else {
// If the instantiator is null and if the type argument vector
// instantiated from null becomes a vector of dynamic, then use null as
// the type arguments and do not pass the instantiator.
const intptr_t len = type_arguments().Length();
if (type_arguments().IsRawInstantiatedRaw(len)) {
const Immediate& raw_null =
Immediate(reinterpret_cast<intptr_t>(Object::null()));
Label instantiator_not_null;
__ cmpl(instantiator_reg, raw_null);
__ j(NOT_EQUAL, &instantiator_not_null, Assembler::kNearJump);
// Null was used in VisitExtractConstructorTypeArguments as the
// instantiated type arguments, no proper instantiator needed.
__ movl(instantiator_reg,
Immediate(Smi::RawValue(StubCode::kNoInstantiator)));
__ Bind(&instantiator_not_null);
}
}
// instantiator_reg: instantiator or kNoInstantiator.
}
LocationSummary* AllocateContextInstr::MakeLocationSummary() const {
const intptr_t kNumInputs = 0;
const intptr_t kNumTemps = 1;
LocationSummary* locs =
new LocationSummary(kNumInputs, kNumTemps, LocationSummary::kCall);
locs->set_temp(0, Location::RegisterLocation(EDX));
locs->set_out(Location::RegisterLocation(EAX));
return locs;
}
void AllocateContextInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
ASSERT(locs()->temp(0).reg() == EDX);
ASSERT(locs()->out().reg() == EAX);
__ movl(EDX, Immediate(num_context_variables()));
const ExternalLabel label("alloc_context",
StubCode::AllocateContextEntryPoint());
compiler->GenerateCall(token_pos(),
&label,
PcDescriptors::kOther,
locs());
}
LocationSummary* CloneContextInstr::MakeLocationSummary() const {
const intptr_t kNumInputs = 1;
const intptr_t kNumTemps = 0;
LocationSummary* locs =
new LocationSummary(kNumInputs, kNumTemps, LocationSummary::kCall);
locs->set_in(0, Location::RegisterLocation(EAX));
locs->set_out(Location::RegisterLocation(EAX));
return locs;
}
void CloneContextInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
Register context_value = locs()->in(0).reg();
Register result = locs()->out().reg();
__ PushObject(Object::ZoneHandle()); // Make room for the result.
__ pushl(context_value);
compiler->GenerateCallRuntime(token_pos(),
deopt_id(),
kCloneContextRuntimeEntry,
locs());
__ popl(result); // Remove argument.
__ popl(result); // Get result (cloned context).
}
LocationSummary* CatchEntryInstr::MakeLocationSummary() const {
return LocationSummary::Make(0,
Location::NoLocation(),
LocationSummary::kNoCall);
}
// Restore stack and initialize the two exception variables:
// exception and stack trace variables.
void CatchEntryInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
// Restore ESP from EBP as we are coming from a throw and the code for
// popping arguments has not been run.
const intptr_t fp_sp_dist =
(kFirstLocalSlotIndex + 1 - compiler->StackSize()) * kWordSize;
ASSERT(fp_sp_dist <= 0);
__ leal(ESP, Address(EBP, fp_sp_dist));
ASSERT(!exception_var().is_captured());
ASSERT(!stacktrace_var().is_captured());
__ movl(Address(EBP, exception_var().index() * kWordSize),
kExceptionObjectReg);
__ movl(Address(EBP, stacktrace_var().index() * kWordSize),
kStackTraceObjectReg);
}
LocationSummary* CheckStackOverflowInstr::MakeLocationSummary() const {
const intptr_t kNumInputs = 0;
const intptr_t kNumTemps = 0;
LocationSummary* summary =
new LocationSummary(kNumInputs,
kNumTemps,
LocationSummary::kCallOnSlowPath);
return summary;
}
class CheckStackOverflowSlowPath : public SlowPathCode {
public:
explicit CheckStackOverflowSlowPath(CheckStackOverflowInstr* instruction)
: instruction_(instruction) { }
virtual void EmitNativeCode(FlowGraphCompiler* compiler) {
__ Comment("CheckStackOverflowSlowPath");
__ Bind(entry_label());
compiler->SaveLiveRegisters(instruction_->locs());
// pending_deoptimization_env_ is needed to generate a runtime call that
// may throw an exception.
ASSERT(compiler->pending_deoptimization_env_ == NULL);
compiler->pending_deoptimization_env_ = instruction_->env();
compiler->GenerateCallRuntime(instruction_->token_pos(),
instruction_->deopt_id(),
kStackOverflowRuntimeEntry,
instruction_->locs());
compiler->pending_deoptimization_env_ = NULL;
compiler->RestoreLiveRegisters(instruction_->locs());
__ jmp(exit_label());
}
private:
CheckStackOverflowInstr* instruction_;
};
void CheckStackOverflowInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
CheckStackOverflowSlowPath* slow_path = new CheckStackOverflowSlowPath(this);
compiler->AddSlowPathCode(slow_path);
__ cmpl(ESP,
Address::Absolute(Isolate::Current()->stack_limit_address()));
__ j(BELOW_EQUAL, slow_path->entry_label());
__ Bind(slow_path->exit_label());
}
static void EmitSmiShiftLeft(FlowGraphCompiler* compiler,
BinarySmiOpInstr* shift_left) {
const bool is_truncating = shift_left->is_truncating();
const LocationSummary& locs = *shift_left->locs();
Register left = locs.in(0).reg();
Register result = locs.out().reg();
ASSERT(left == result);
Label* deopt = shift_left->CanDeoptimize() ?
compiler->AddDeoptStub(shift_left->deopt_id(), kDeoptBinarySmiOp) : NULL;
if (locs.in(1).IsConstant()) {
const Object& constant = locs.in(1).constant();
ASSERT(constant.IsSmi());
// shll operation masks the count to 5 bits.
const intptr_t kCountLimit = 0x1F;
const intptr_t value = Smi::Cast(constant).Value();
if (value == 0) {
// No code needed.
} else if ((value < 0) || (value >= kCountLimit)) {
// This condition may not be known earlier in some cases because
// of constant propagation, inlining, etc.
if ((value >=kCountLimit) && is_truncating) {
__ xorl(result, result);
} else {
// Result is Mint or exception.
__ jmp(deopt);
}
} else {
if (!is_truncating) {
// Check for overflow.
Register temp = locs.temp(0).reg();
__ movl(temp, left);
__ shll(left, Immediate(value));
__ sarl(left, Immediate(value));
__ cmpl(left, temp);
__ j(NOT_EQUAL, deopt); // Overflow.
}
// Shift for result now we know there is no overflow.
__ shll(left, Immediate(value));
}
return;
}
// Right (locs.in(1)) is not constant.
Register right = locs.in(1).reg();
Range* right_range = shift_left->right()->definition()->range();
if (shift_left->left()->BindsToConstant() && !is_truncating) {
// TODO(srdjan): Implement code below for is_truncating().
// If left is constant, we know the maximal allowed size for right.
const Object& obj = shift_left->left()->BoundConstant();
if (obj.IsSmi()) {
const intptr_t left_int = Smi::Cast(obj).Value();
if (left_int == 0) {
__ cmpl(right, Immediate(0));
__ j(NEGATIVE, deopt);
return;
}
intptr_t tmp = (left_int > 0) ? left_int : ~left_int;
intptr_t max_right = kSmiBits;
while ((tmp >>= 1) != 0) {
max_right--;
}
const bool right_needs_check =
(right_range == NULL) ||
!right_range->IsWithin(0, max_right - 1);
if (right_needs_check) {
__ cmpl(right,
Immediate(reinterpret_cast<int32_t>(Smi::New(max_right))));
__ j(ABOVE_EQUAL, deopt);
}
__ SmiUntag(right);
__ shll(left, right);
}
return;
}
const bool right_needs_check =
(right_range == NULL) || !right_range->IsWithin(0, (Smi::kBits - 1));
ASSERT(right == ECX); // Count must be in ECX
if (is_truncating) {
if (right_needs_check) {
const bool right_may_be_negative =
(right_range == NULL) ||
!right_range->IsWithin(0, RangeBoundary::kPlusInfinity);
if (right_may_be_negative) {
ASSERT(shift_left->CanDeoptimize());
__ cmpl(right, Immediate(0));
__ j(NEGATIVE, deopt);
}
Label done, is_not_zero;
__ cmpl(right,
Immediate(reinterpret_cast<int32_t>(Smi::New(Smi::kBits))));
__ j(BELOW, &is_not_zero, Assembler::kNearJump);
__ xorl(left, left);
__ jmp(&done, Assembler::kNearJump);
__ Bind(&is_not_zero);
__ SmiUntag(right);
__ shll(left, right);
__ Bind(&done);
} else {
__ SmiUntag(right);
__ shll(left, right);
}
} else {
if (right_needs_check) {
ASSERT(shift_left->CanDeoptimize());
__ cmpl(right,
Immediate(reinterpret_cast<int32_t>(Smi::New(Smi::kBits))));
__ j(ABOVE_EQUAL, deopt);
}
// Left is not a constant.
Register temp = locs.temp(0).reg();
// Check if count too large for handling it inlined.
__ movl(temp, left);
__ SmiUntag(right);
// Overflow test (preserve temp and right);
__ shll(left, right);
__ sarl(left, right);
__ cmpl(left, temp);
__ j(NOT_EQUAL, deopt); // Overflow.
// Shift for result now we know there is no overflow.
__ shll(left, right);
}
}
LocationSummary* BinarySmiOpInstr::MakeLocationSummary() const {
const intptr_t kNumInputs = 2;
if (op_kind() == Token::kTRUNCDIV) {
const intptr_t kNumTemps = 1;
LocationSummary* summary =
new LocationSummary(kNumInputs, kNumTemps, LocationSummary::kNoCall);
if (RightIsPowerOfTwoConstant()) {
summary->set_in(0, Location::RequiresRegister());
ConstantInstr* right_constant = right()->definition()->AsConstant();
summary->set_in(1, Location::Constant(right_constant->value()));
summary->set_temp(0, Location::RequiresRegister());
summary->set_out(Location::SameAsFirstInput());
} else {
// Both inputs must be writable because they will be untagged.
summary->set_in(0, Location::RegisterLocation(EAX));
summary->set_in(1, Location::WritableRegister());
summary->set_out(Location::SameAsFirstInput());
// Will be used for sign extension and division.
summary->set_temp(0, Location::RegisterLocation(EDX));
}
return summary;
} else if (op_kind() == Token::kSHR) {
const intptr_t kNumTemps = 0;
LocationSummary* summary =
new LocationSummary(kNumInputs, kNumTemps, LocationSummary::kNoCall);
summary->set_in(0, Location::RequiresRegister());
summary->set_in(1, Location::FixedRegisterOrSmiConstant(right(), ECX));
summary->set_out(Location::SameAsFirstInput());
return summary;
} else if (op_kind() == Token::kSHL) {
const intptr_t kNumTemps = 0;
LocationSummary* summary =
new LocationSummary(kNumInputs, kNumTemps, LocationSummary::kNoCall);
summary->set_in(0, Location::RequiresRegister());
summary->set_in(1, Location::FixedRegisterOrSmiConstant(right(), ECX));
if (!is_truncating()) {
summary->AddTemp(Location::RequiresRegister());
}
summary->set_out(Location::SameAsFirstInput());
return summary;
} else {
const intptr_t kNumTemps = 0;
LocationSummary* summary =
new LocationSummary(kNumInputs, kNumTemps, LocationSummary::kNoCall);
summary->set_in(0, Location::RequiresRegister());
summary->set_in(1, Location::RegisterOrSmiConstant(right()));
summary->set_out(Location::SameAsFirstInput());
return summary;
}
}
void BinarySmiOpInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
if (op_kind() == Token::kSHL) {
EmitSmiShiftLeft(compiler, this);
return;
}
ASSERT(!is_truncating());
Register left = locs()->in(0).reg();
Register result = locs()->out().reg();
ASSERT(left == result);
Label* deopt = NULL;
if (CanDeoptimize()) {
deopt = compiler->AddDeoptStub(deopt_id(), kDeoptBinarySmiOp);
}
if (locs()->in(1).IsConstant()) {
const Object& constant = locs()->in(1).constant();
ASSERT(constant.IsSmi());
const int32_t imm =
reinterpret_cast<int32_t>(constant.raw());
switch (op_kind()) {
case Token::kADD:
__ addl(left, Immediate(imm));
if (deopt != NULL) __ j(OVERFLOW, deopt);
break;
case Token::kSUB: {
__ subl(left, Immediate(imm));
if (deopt != NULL) __ j(OVERFLOW, deopt);
break;
}
case Token::kMUL: {
// Keep left value tagged and untag right value.
const intptr_t value = Smi::Cast(constant).Value();
if (value == 2) {
__ shll(left, Immediate(1));
} else {
__ imull(left, Immediate(value));
}
if (deopt != NULL) __ j(OVERFLOW, deopt);
break;
}
case Token::kTRUNCDIV: {
const intptr_t value = Smi::Cast(constant).Value();
if (value == 1) {
// Do nothing.
break;
} else if (value == -1) {
// Check the corner case of dividing the 'MIN_SMI' with -1, in which
// case we cannot negate the result.
__ cmpl(left, Immediate(0x80000000));
__ j(EQUAL, deopt);
__ negl(left);
break;
}
ASSERT((value != 0) && Utils::IsPowerOfTwo(Utils::Abs(value)));
const intptr_t shift_count =
Utils::ShiftForPowerOfTwo(Utils::Abs(value)) + kSmiTagSize;
ASSERT(kSmiTagSize == 1);
Register temp = locs()->temp(0).reg();
__ movl(temp, left);
__ sarl(temp, Immediate(31));
ASSERT(shift_count > 1); // 1, -1 case handled above.
__ shrl(temp, Immediate(32 - shift_count));
__ addl(left, temp);
ASSERT(shift_count > 0);
__ sarl(left, Immediate(shift_count));
if (value < 0) {
__ negl(left);
}
__ SmiTag(left);
break;
}
case Token::kBIT_AND: {
// No overflow check.
__ andl(left, Immediate(imm));
break;
}
case Token::kBIT_OR: {
// No overflow check.
__ orl(left, Immediate(imm));
break;
}
case Token::kBIT_XOR: {
// No overflow check.
__ xorl(left, Immediate(imm));
break;
}
case Token::kSHR: {
// sarl operation masks the count to 5 bits.
const intptr_t kCountLimit = 0x1F;
intptr_t value = Smi::Cast(constant).Value();
if (value == 0) {
// TODO(vegorov): should be handled outside.
break;
} else if (value < 0) {
// TODO(vegorov): should be handled outside.
__ jmp(deopt);
break;
}
value = value + kSmiTagSize;
if (value >= kCountLimit) value = kCountLimit;
__ sarl(left, Immediate(value));
__ SmiTag(left);
break;
}
default:
UNREACHABLE();
break;
}
return;
}
Register right = locs()->in(1).reg();
switch (op_kind()) {
case Token::kADD: {
__ addl(left, right);
if (deopt != NULL) __ j(OVERFLOW, deopt);
break;
}
case Token::kSUB: {
__ subl(left, right);
if (deopt != NULL) __ j(OVERFLOW, deopt);
break;
}
case Token::kMUL: {
__ SmiUntag(left);
__ imull(left, right);
if (deopt != NULL) __ j(OVERFLOW, deopt);
break;
}
case Token::kBIT_AND: {
// No overflow check.
__ andl(left, right);
break;
}
case Token::kBIT_OR: {
// No overflow check.
__ orl(left, right);
break;
}
case Token::kBIT_XOR: {
// No overflow check.
__ xorl(left, right);
break;
}
case Token::kTRUNCDIV: {
// Handle divide by zero in runtime.
__ testl(right, right);
__ j(ZERO, deopt);
ASSERT(left == EAX);
ASSERT((right != EDX) && (right != EAX));
ASSERT(locs()->temp(0).reg() == EDX);
ASSERT(result == EAX);
__ SmiUntag(left);
__ SmiUntag(right);
__ cdq(); // Sign extend EAX -> EDX:EAX.
__ idivl(right); // EAX: quotient, EDX: remainder.
// Check the corner case of dividing the 'MIN_SMI' with -1, in which
// case we cannot tag the result.
__ cmpl(result, Immediate(0x40000000));
__ j(EQUAL, deopt);
__ SmiTag(result);
break;
}
case Token::kSHR: {
if (CanDeoptimize()) {
__ cmpl(right, Immediate(0));
__ j(LESS, deopt);
}
__ SmiUntag(right);
// sarl operation masks the count to 5 bits.
const intptr_t kCountLimit = 0x1F;
Range* right_range = this->right()->definition()->range();
if ((right_range == NULL) ||
!right_range->IsWithin(RangeBoundary::kMinusInfinity, kCountLimit)) {
__ cmpl(right, Immediate(kCountLimit));
Label count_ok;
__ j(LESS, &count_ok, Assembler::kNearJump);
__ movl(right, Immediate(kCountLimit));
__ Bind(&count_ok);
}
ASSERT(right == ECX); // Count must be in ECX
__ SmiUntag(left);
__ sarl(left, right);
__ SmiTag(left);
break;
}
case Token::kDIV: {
// Dispatches to 'Double./'.
// TODO(srdjan): Implement as conversion to double and double division.
UNREACHABLE();
break;
}
case Token::kMOD: {
// TODO(srdjan): Implement.
UNREACHABLE();
break;
}
case Token::kOR:
case Token::kAND: {
// Flow graph builder has dissected this operation to guarantee correct
// behavior (short-circuit evaluation).
UNREACHABLE();
break;
}
default:
UNREACHABLE();
break;
}
}
LocationSummary* CheckEitherNonSmiInstr::MakeLocationSummary() const {
intptr_t left_cid = left()->Type()->ToCid();
intptr_t right_cid = right()->Type()->ToCid();
ASSERT((left_cid != kDoubleCid) && (right_cid != kDoubleCid));
const intptr_t kNumInputs = 2;
const bool need_temp = (left_cid != kSmiCid) && (right_cid != kSmiCid);
const intptr_t kNumTemps = need_temp ? 1 : 0;
LocationSummary* summary =
new LocationSummary(kNumInputs, kNumTemps, LocationSummary::kNoCall);
summary->set_in(0, Location::RequiresRegister());
summary->set_in(1, Location::RequiresRegister());
if (need_temp) summary->set_temp(0, Location::RequiresRegister());
return summary;
}
void CheckEitherNonSmiInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
Label* deopt = compiler->AddDeoptStub(deopt_id(), kDeoptBinaryDoubleOp);
intptr_t left_cid = left()->Type()->ToCid();
intptr_t right_cid = right()->Type()->ToCid();
Register left = locs()->in(0).reg();
Register right = locs()->in(1).reg();
if (left_cid == kSmiCid) {
__ testl(right, Immediate(kSmiTagMask));
} else if (right_cid == kSmiCid) {
__ testl(left, Immediate(kSmiTagMask));
} else {
Register temp = locs()->temp(0).reg();
__ movl(temp, left);
__ orl(temp, right);
__ testl(temp, Immediate(kSmiTagMask));
}
__ j(ZERO, deopt);
}
LocationSummary* BoxDoubleInstr::MakeLocationSummary() const {
const intptr_t kNumInputs = 1;
const intptr_t kNumTemps = 0;
LocationSummary* summary =
new LocationSummary(kNumInputs,
kNumTemps,
LocationSummary::kCallOnSlowPath);
summary->set_in(0, Location::RequiresFpuRegister());
summary->set_out(Location::RequiresRegister());
return summary;
}
class BoxDoubleSlowPath : public SlowPathCode {
public:
explicit BoxDoubleSlowPath(BoxDoubleInstr* instruction)
: instruction_(instruction) { }
virtual void EmitNativeCode(FlowGraphCompiler* compiler) {
__ Comment("BoxDoubleSlowPath");
__ Bind(entry_label());
const Class& double_class = compiler->double_class();
const Code& stub =
Code::Handle(StubCode::GetAllocationStubForClass(double_class));
const ExternalLabel label(double_class.ToCString(), stub.EntryPoint());
LocationSummary* locs = instruction_->locs();
locs->live_registers()->Remove(locs->out());
compiler->SaveLiveRegisters(locs);
compiler->GenerateCall(Scanner::kDummyTokenIndex, // No token position.
&label,
PcDescriptors::kOther,
locs);
__ MoveRegister(locs->out().reg(), EAX);
compiler->RestoreLiveRegisters(locs);
__ jmp(exit_label());
}
private:
BoxDoubleInstr* instruction_;
};
void BoxDoubleInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
BoxDoubleSlowPath* slow_path = new BoxDoubleSlowPath(this);
compiler->AddSlowPathCode(slow_path);
Register out_reg = locs()->out().reg();
XmmRegister value = locs()->in(0).fpu_reg();
__ TryAllocate(compiler->double_class(),
slow_path->entry_label(),
Assembler::kFarJump,
out_reg);
__ Bind(slow_path->exit_label());
__ movsd(FieldAddress(out_reg, Double::value_offset()), value);
}
LocationSummary* UnboxDoubleInstr::MakeLocationSummary() const {
const intptr_t kNumInputs = 1;
const intptr_t value_cid = value()->Type()->ToCid();
const bool needs_temp = ((value_cid != kSmiCid) && (value_cid != kDoubleCid));
const bool needs_writable_input = (value_cid == kSmiCid);
const intptr_t kNumTemps = needs_temp ? 1 : 0;
LocationSummary* summary =
new LocationSummary(kNumInputs, kNumTemps, LocationSummary::kNoCall);
summary->set_in(0, needs_writable_input
? Location::WritableRegister()
: Location::RequiresRegister());
if (needs_temp) summary->set_temp(0, Location::RequiresRegister());
summary->set_out(Location::RequiresFpuRegister());
return summary;
}
void UnboxDoubleInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
const intptr_t value_cid = value()->Type()->ToCid();
const Register value = locs()->in(0).reg();
const XmmRegister result = locs()->out().fpu_reg();
if (value_cid == kDoubleCid) {
__ movsd(result, FieldAddress(value, Double::value_offset()));
} else if (value_cid == kSmiCid) {
__ SmiUntag(value); // Untag input before conversion.
__ cvtsi2sd(result, value);
} else {
Label* deopt = compiler->AddDeoptStub(deopt_id_, kDeoptBinaryDoubleOp);
Register temp = locs()->temp(0).reg();
Label is_smi, done;
__ testl(value, Immediate(kSmiTagMask));
__ j(ZERO, &is_smi);
__ CompareClassId(value, kDoubleCid, temp);
__ j(NOT_EQUAL, deopt);
__ movsd(result, FieldAddress(value, Double::value_offset()));
__ jmp(&done);
__ Bind(&is_smi);
__ movl(temp, value);
__ SmiUntag(temp);
__ cvtsi2sd(result, temp);
__ Bind(&done);
}
}
LocationSummary* BoxFloat32x4Instr::MakeLocationSummary() const {
const intptr_t kNumInputs = 1;
const intptr_t kNumTemps = 0;
LocationSummary* summary =
new LocationSummary(kNumInputs,
kNumTemps,
LocationSummary::kCallOnSlowPath);
summary->set_in(0, Location::RequiresFpuRegister());
summary->set_out(Location::RequiresRegister());
return summary;
}
class BoxFloat32x4SlowPath : public SlowPathCode {
public:
explicit BoxFloat32x4SlowPath(BoxFloat32x4Instr* instruction)
: instruction_(instruction) { }
virtual void EmitNativeCode(FlowGraphCompiler* compiler) {
__ Comment("BoxFloat32x4SlowPath");
__ Bind(entry_label());
const Class& float32x4_class = compiler->float32x4_class();
const Code& stub =
Code::Handle(StubCode::GetAllocationStubForClass(float32x4_class));
const ExternalLabel label(float32x4_class.ToCString(), stub.EntryPoint());
LocationSummary* locs = instruction_->locs();
locs->live_registers()->Remove(locs->out());
compiler->SaveLiveRegisters(locs);
compiler->GenerateCall(Scanner::kDummyTokenIndex, // No token position.
&label,
PcDescriptors::kOther,
locs);
__ MoveRegister(locs->out().reg(), EAX);
compiler->RestoreLiveRegisters(locs);
__ jmp(exit_label());
}
private:
BoxFloat32x4Instr* instruction_;
};
void BoxFloat32x4Instr::EmitNativeCode(FlowGraphCompiler* compiler) {
BoxFloat32x4SlowPath* slow_path = new BoxFloat32x4SlowPath(this);
compiler->AddSlowPathCode(slow_path);
Register out_reg = locs()->out().reg();
XmmRegister value = locs()->in(0).fpu_reg();
__ TryAllocate(compiler->float32x4_class(),
slow_path->entry_label(),
Assembler::kFarJump,
out_reg);
__ Bind(slow_path->exit_label());
__ movups(FieldAddress(out_reg, Float32x4::value_offset()), value);
}
LocationSummary* UnboxFloat32x4Instr::MakeLocationSummary() const {
const intptr_t kNumInputs = 1;
const intptr_t kNumTemps = 0;
LocationSummary* summary =
new LocationSummary(kNumInputs, kNumTemps, LocationSummary::kNoCall);
summary->set_in(0, Location::RequiresRegister());
summary->set_out(Location::RequiresFpuRegister());
return summary;
}
void UnboxFloat32x4Instr::EmitNativeCode(FlowGraphCompiler* compiler) {
const intptr_t value_cid = value()->Type()->ToCid();
const Register value = locs()->in(0).reg();
const XmmRegister result = locs()->out().fpu_reg();
ASSERT(value_cid == kFloat32x4Cid);
__ movups(result, FieldAddress(value, Float32x4::value_offset()));
}
LocationSummary* BinaryDoubleOpInstr::MakeLocationSummary() const {
const intptr_t kNumInputs = 2;
const intptr_t kNumTemps = 0;
LocationSummary* summary =
new