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sdk/runtime/vm/intermediate_language_arm.cc
T
regis@google.com 52a0f3c983 Enable api tests on ARM. 
Disable generation of optimized code on ARM and MIPS.

Review URL: https://codereview.chromium.org//14476009

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@21972 260f80e4-7a28-3924-810f-c04153c831b5
2013-04-24 18:55:52 +00:00

2606 lines
83 KiB
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// 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_ARM.
#if defined(TARGET_ARCH_ARM)
#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/simulator.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 R0.
LocationSummary* Instruction::MakeCallSummary() {
LocationSummary* result = new LocationSummary(0, 0, LocationSummary::kCall);
result->set_out(Location::RegisterLocation(R0));
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()) {
__ Push(value.reg());
} else if (value.IsConstant()) {
__ PushObject(value.constant());
} else {
ASSERT(value.IsStackSlot());
__ ldr(IP, value.ToStackSlotAddress());
__ Push(IP);
}
}
}
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(R0));
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 instructions: a branch macro sequence.
void ReturnInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
Register result = locs()->in(0).reg();
ASSERT(result == R0);
#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");
const intptr_t fp_sp_dist =
(kFirstLocalSlotIndex + 1 - compiler->StackSize()) * kWordSize;
ASSERT(fp_sp_dist <= 0);
__ sub(R2, SP, ShifterOperand(FP));
__ CompareImmediate(R2, fp_sp_dist);
__ bkpt(0, NE);
}
#endif
__ LeaveDartFrame();
__ Ret();
// No need to generate NOP instructions so that the debugger can patch the
// return pattern (3 instructions) with a call to the debug stub (also 3
// instructions).
compiler->AddCurrentDescriptor(PcDescriptors::kReturn,
Isolate::kNoDeoptId,
token_pos());
}
bool IfThenElseInstr::IsSupported() {
return false;
}
bool IfThenElseInstr::Supports(ComparisonInstr* comparison,
Value* v1,
Value* v2) {
UNREACHABLE();
return false;
}
LocationSummary* IfThenElseInstr::MakeLocationSummary() const {
UNREACHABLE();
return NULL;
}
void IfThenElseInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
UNREACHABLE();
}
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(R0));
result->set_temp(0, Location::RegisterLocation(R4)); // Arg. descriptor.
return result;
}
void ClosureCallInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
// The arguments to the stub include the closure, as does the arguments
// descriptor.
Register temp_reg = locs()->temp(0).reg();
int argument_count = ArgumentCount();
const Array& arguments_descriptor =
Array::ZoneHandle(ArgumentsDescriptor::New(argument_count,
argument_names()));
__ LoadObject(temp_reg, arguments_descriptor);
compiler->GenerateDartCall(deopt_id(),
token_pos(),
&StubCode::CallClosureFunctionLabel(),
PcDescriptors::kOther,
locs());
__ Drop(argument_count);
}
LocationSummary* LoadLocalInstr::MakeLocationSummary() const {
return LocationSummary::Make(0,
Location::RequiresRegister(),
LocationSummary::kNoCall);
}
void LoadLocalInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
Register result = locs()->out().reg();
__ LoadFromOffset(kLoadWord, result, FP, 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.
__ str(value, Address(FP, local().index() * kWordSize));
}
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(R0)); // Value.
summary->set_in(1, Location::RegisterLocation(R2)); // Instantiator.
summary->set_in(2, Location::RegisterLocation(R1)); // Type arguments.
summary->set_out(Location::RegisterLocation(R0));
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(R0));
locs->set_out(Location::RegisterLocation(R0));
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());
__ b(&done, EQ);
__ CompareObject(reg, Bool::False());
__ b(&done, EQ);
__ Push(reg); // Push the source object.
compiler->GenerateCallRuntime(token_pos,
deopt_id,
kConditionTypeErrorRuntimeEntry,
locs);
// We should never return here.
__ bkpt(0);
__ 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 {
UNIMPLEMENTED();
return NULL;
}
void ArgumentDefinitionTestInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
UNIMPLEMENTED();
}
static Condition TokenKindToSmiCondition(Token::Kind kind) {
switch (kind) {
case Token::kEQ: return EQ;
case Token::kNE: return NE;
case Token::kLT: return LT;
case Token::kGT: return GT;
case Token::kLTE: return LE;
case Token::kGTE: return GE;
default:
UNREACHABLE();
return VS;
}
}
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);
UNIMPLEMENTED(); // TODO(regis): Verify register allocation.
return locs;
}
const intptr_t kNumTemps = 1;
LocationSummary* locs =
new LocationSummary(kNumInputs, kNumTemps, LocationSummary::kCall);
locs->set_in(0, Location::RegisterLocation(R1));
locs->set_in(1, Location::RegisterLocation(R0));
locs->set_temp(0, Location::RegisterLocation(R5));
locs->set_out(Location::RegisterLocation(R0));
return locs;
}
// R1: left.
// R0: right.
// Uses R5 to load ic_call_data.
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;
Label check_identity;
__ LoadImmediate(IP, reinterpret_cast<intptr_t>(Object::null()));
__ cmp(R1, ShifterOperand(IP));
__ b(&check_identity, EQ);
__ cmp(R0, ShifterOperand(IP));
__ b(&check_identity, EQ);
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);
}
__ PushList((1 << R0) | (1 << R1));
compiler->GenerateInstanceCall(deopt_id,
token_pos,
kNumberOfArguments,
kNoArgumentNames,
locs,
equality_ic_data);
Label check_ne;
__ b(&check_ne);
__ Bind(&check_identity);
Label equality_done;
if (compiler->is_optimizing()) {
// No need to update IC data.
__ cmp(R0, ShifterOperand(R1));
__ LoadObject(R0, (kind == Token::kEQ) ? Bool::False() : Bool::True(), NE);
__ LoadObject(R0, (kind == Token::kEQ) ? Bool::True() : Bool::False(), EQ);
if (kind == Token::kNE) {
// Skip not-equal result conversion.
__ b(&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 == R5); // Stub depends on it.
__ LoadObject(ic_data_reg, equality_ic_data);
// Pass left in R1 and right in R0.
compiler->GenerateCall(token_pos,
&StubCode::EqualityWithNullArgLabel(),
PcDescriptors::kOther,
locs);
}
__ Bind(&check_ne);
if (kind == Token::kNE) {
// Negate the condition: true label returns false and vice versa.
__ CompareObject(R0, Bool::True());
__ LoadObject(R0, Bool::True(), NE);
__ LoadObject(R0, Bool::False(), EQ);
}
__ 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) {
__ mov(value_cid_reg, ShifterOperand(kSmiCid));
}
__ tst(value_reg, ShifterOperand(kSmiTagMask));
if (value_is_smi == NULL) {
__ b(&done, EQ);
} else {
__ b(value_is_smi, EQ);
}
__ LoadClassId(value_cid_reg, value_reg);
__ 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) {
UNIMPLEMENTED();
}
// 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) {
UNIMPLEMENTED();
}
static Condition NegateCondition(Condition condition) {
switch (condition) {
case EQ: return NE;
case NE: return EQ;
case LT: return GE;
case LE: return GT;
case GT: return LE;
case GE: return LT;
case CC: return CS;
case LS: return HI;
case HI: return LS;
case CS: return CC;
default:
UNIMPLEMENTED();
return EQ;
}
}
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 {
__ cmp(left.reg(), ShifterOperand(right.reg()));
}
if (branch != NULL) {
branch->EmitBranchOnCondition(compiler, true_condition);
} else {
Register result = locs.out().reg();
__ LoadObject(result, Bool::True(), true_condition);
__ LoadObject(result, Bool::False(), NegateCondition(true_condition));
}
}
static void EmitUnboxedMintEqualityOp(FlowGraphCompiler* compiler,
const LocationSummary& locs,
Token::Kind kind,
BranchInstr* branch) {
UNIMPLEMENTED();
}
static void EmitUnboxedMintComparisonOp(FlowGraphCompiler* compiler,
const LocationSummary& locs,
Token::Kind kind,
BranchInstr* branch) {
UNIMPLEMENTED();
}
static void EmitDoubleComparisonOp(FlowGraphCompiler* compiler,
const LocationSummary& locs,
Token::Kind kind,
BranchInstr* branch) {
UNIMPLEMENTED();
}
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();
ASSERT(left == R1);
ASSERT(right == R0);
EmitEqualityAsInstanceCall(compiler,
deopt_id(),
token_pos(),
kind(),
locs(),
*ic_data());
ASSERT(locs()->out().reg() == R0);
}
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();
ASSERT(left == R1);
ASSERT(right == R0);
EmitEqualityAsInstanceCall(compiler,
deopt_id(),
token_pos(),
Token::kEQ, // kNE reverse occurs at branch.
locs(),
*ic_data());
if (branch->is_checked()) {
EmitAssertBoolean(R0, token_pos(), deopt_id(), locs(), compiler);
}
Condition branch_condition = (kind() == Token::kNE) ? NE : EQ;
__ CompareObject(R0, 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(R0));
locs->set_in(1, Location::RegisterLocation(R1));
locs->set_out(Location::RegisterLocation(R0));
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();
__ Push(left);
__ Push(right);
if (HasICData() && (ic_data()->NumberOfChecks() > 0)) {
Label* deopt = compiler->AddDeoptStub(deopt_id(), kDeoptRelationalOp);
// Load class into R2. Since this is a call, any register except
// the fixed input registers would be ok.
ASSERT((left != R2) && (right != R2));
const intptr_t kNumArguments = 2;
LoadValueCid(compiler, R2, left);
compiler->EmitTestAndCall(ICData::Handle(ic_data()->AsUnaryClassChecks()),
R2, // 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(R0, Bool::True());
branch->EmitBranchOnCondition(compiler, EQ);
}
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(R1));
locs->set_temp(1, Location::RegisterLocation(R2));
locs->set_temp(2, Location::RegisterLocation(R5));
locs->set_out(Location::RegisterLocation(R0));
return locs;
}
void NativeCallInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
ASSERT(locs()->temp(0).reg() == R1);
ASSERT(locs()->temp(1).reg() == R2);
ASSERT(locs()->temp(2).reg() == R5);
Register result = locs()->out().reg();
// Push the result place holder initialized to NULL.
__ PushObject(Object::ZoneHandle());
// Pass a pointer to the first argument in R2.
if (!function().HasOptionalParameters()) {
__ AddImmediate(R2, FP, (kLastParamSlotIndex +
function().NumParameters() - 1) * kWordSize);
} else {
__ AddImmediate(R2, FP, kFirstLocalSlotIndex * kWordSize);
}
// Compute the effective address. When running under the simulator,
// this is a redirection address that forces the simulator to call
// into the runtime system.
uword entry = reinterpret_cast<uword>(native_c_function());
#if defined(USING_SIMULATOR)
entry = Simulator::RedirectExternalReference(entry, Simulator::kNativeCall);
#endif
__ LoadImmediate(R5, entry);
__ LoadImmediate(R1, NativeArguments::ComputeArgcTag(function()));
compiler->GenerateCall(token_pos(),
&StubCode::CallNativeCFunctionLabel(),
PcDescriptors::kOther,
locs());
__ Pop(result);
}
LocationSummary* StringFromCharCodeInstr::MakeLocationSummary() const {
UNIMPLEMENTED();
return NULL;
}
void StringFromCharCodeInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
UNIMPLEMENTED();
}
LocationSummary* LoadUntaggedInstr::MakeLocationSummary() const {
UNIMPLEMENTED();
return NULL;
}
void LoadUntaggedInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
UNIMPLEMENTED();
}
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).
// TODO(regis): Revisit and see if the index can be immediate.
locs->set_in(1, Location::WritableRegister());
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()) {
UNIMPLEMENTED();
} else {
ASSERT(this->array()->definition()->representation() == kTagged);
ASSERT(index.IsRegister()); // TODO(regis): Revisit.
// Note that index is expected smi-tagged, (i.e, times 2) for all arrays
// with index scale factor > 1. E.g., for Uint8Array and OneByteString the
// index is expected to be untagged before accessing.
ASSERT(kSmiTagShift == 1);
switch (index_scale()) {
case 1: {
__ SmiUntag(index.reg());
break;
}
case 2: {
break;
}
case 4: {
__ mov(index.reg(), ShifterOperand(index.reg(), LSL, 1));
break;
}
case 8: {
__ mov(index.reg(), ShifterOperand(index.reg(), LSL, 2));
break;
}
case 16: {
__ mov(index.reg(), ShifterOperand(index.reg(), LSL, 3));
break;
}
default:
UNREACHABLE();
}
__ AddImmediate(index.reg(),
FlowGraphCompiler::DataOffsetFor(class_id()) - kHeapObjectTag);
element_address = Address(array, index.reg(), LSL, 0);
}
if ((representation() == kUnboxedDouble) ||
(representation() == kUnboxedMint) ||
(representation() == kUnboxedFloat32x4)) {
UNIMPLEMENTED();
}
Register result = locs()->out().reg();
if ((index_scale() == 1) && index.IsRegister()) {
__ SmiUntag(index.reg());
}
switch (class_id()) {
case kTypedDataInt8ArrayCid:
ASSERT(index_scale() == 1);
__ ldrsb(result, element_address);
__ SmiTag(result);
break;
case kTypedDataUint8ArrayCid:
case kTypedDataUint8ClampedArrayCid:
case kExternalTypedDataUint8ArrayCid:
case kExternalTypedDataUint8ClampedArrayCid:
case kOneByteStringCid:
ASSERT(index_scale() == 1);
__ ldrb(result, element_address);
__ SmiTag(result);
break;
case kTypedDataInt16ArrayCid:
__ ldrsh(result, element_address);
__ SmiTag(result);
break;
case kTypedDataUint16ArrayCid:
case kTwoByteStringCid:
__ ldrh(result, element_address);
__ SmiTag(result);
break;
case kTypedDataInt32ArrayCid: {
Label* deopt = compiler->AddDeoptStub(deopt_id(), kDeoptInt32Load);
__ ldr(result, element_address);
// Verify that the signed value in 'result' can fit inside a Smi.
__ CompareImmediate(result, 0xC0000000);
__ b(deopt, MI);
__ SmiTag(result);
}
break;
case kTypedDataUint32ArrayCid: {
Label* deopt = compiler->AddDeoptStub(deopt_id(), kDeoptUint32Load);
__ ldr(result, element_address);
// Verify that the unsigned value in 'result' can fit inside a Smi.
__ tst(result, ShifterOperand(0xC0000000));
__ b(deopt, NE);
__ SmiTag(result);
}
break;
default:
ASSERT((class_id() == kArrayCid) || (class_id() == kImmutableArrayCid));
__ ldr(result, element_address);
break;
}
}
Representation StoreIndexedInstr::RequiredInputRepresentation(
intptr_t idx) const {
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).
// TODO(regis): Revisit and see if the index can be immediate.
locs->set_in(1, Location::WritableRegister());
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:
case kTypedDataInt16ArrayCid:
case kTypedDataUint16ArrayCid:
case kTypedDataInt32ArrayCid:
case kTypedDataUint32ArrayCid:
case kTypedDataFloat32ArrayCid:
case kTypedDataFloat64ArrayCid:
case kTypedDataFloat32x4ArrayCid:
UNIMPLEMENTED();
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()) {
UNIMPLEMENTED();
} else {
ASSERT(this->array()->definition()->representation() == kTagged);
ASSERT(index.IsRegister()); // TODO(regis): Revisit.
// Note that index is expected smi-tagged, (i.e, times 2) for all arrays
// with index scale factor > 1. E.g., for Uint8Array and OneByteString the
// index is expected to be untagged before accessing.
ASSERT(kSmiTagShift == 1);
switch (index_scale()) {
case 1: {
__ SmiUntag(index.reg());
break;
}
case 2: {
break;
}
case 4: {
__ mov(index.reg(), ShifterOperand(index.reg(), LSL, 1));
break;
}
case 8: {
__ mov(index.reg(), ShifterOperand(index.reg(), LSL, 2));
break;
}
case 16: {
__ mov(index.reg(), ShifterOperand(index.reg(), LSL, 3));
break;
}
default:
UNREACHABLE();
}
__ AddImmediate(index.reg(),
FlowGraphCompiler::DataOffsetFor(class_id()) - kHeapObjectTag);
element_address = Address(array, index.reg(), LSL, 0);
}
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:
case kTypedDataUint8ClampedArrayCid:
case kExternalTypedDataUint8ClampedArrayCid:
case kTypedDataInt16ArrayCid:
case kTypedDataUint16ArrayCid:
case kTypedDataInt32ArrayCid:
case kTypedDataUint32ArrayCid:
case kTypedDataFloat32ArrayCid:
case kTypedDataFloat64ArrayCid:
case kTypedDataFloat32x4ArrayCid:
UNIMPLEMENTED();
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 = R2;
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_reg == kNoRegister) {
ASSERT(!compiler->is_optimizing());
value_cid_reg = R3;
ASSERT((value_cid_reg != value_reg) && (field_reg != value_cid_reg));
}
if (value_cid == kDynamicCid) {
LoadValueCid(compiler, value_cid_reg, value_reg);
__ ldr(IP, field_cid_operand);
__ cmp(value_cid_reg, ShifterOperand(IP));
__ b(&ok, EQ);
__ ldr(IP, field_nullability_operand);
__ cmp(value_cid_reg, ShifterOperand(IP));
} else if (value_cid == kNullCid) {
__ ldr(value_cid_reg, field_nullability_operand);
__ CompareImmediate(value_cid_reg, value_cid);
} else {
__ ldr(value_cid_reg, field_cid_operand);
__ CompareImmediate(value_cid_reg, value_cid);
}
__ b(&ok, EQ);
__ ldr(IP, field_cid_operand);
__ CompareImmediate(IP, kIllegalCid);
__ b(fail, NE);
if (value_cid == kDynamicCid) {
__ str(value_cid_reg, field_cid_operand);
__ str(value_cid_reg, field_nullability_operand);
} else {
__ LoadImmediate(IP, value_cid);
__ str(IP, field_cid_operand);
__ str(IP, field_nullability_operand);
}
if (!ok_is_fall_through) {
__ b(&ok);
}
} else {
if (value_cid == kDynamicCid) {
// Field's guarded class id is fixed by value's class id is not known.
__ tst(value_reg, ShifterOperand(kSmiTagMask));
if (field_cid != kSmiCid) {
__ b(fail, EQ);
__ LoadClassId(value_cid_reg, value_reg);
__ CompareImmediate(value_cid_reg, field_cid);
}
if (field().is_nullable() && (field_cid != kNullCid)) {
__ b(&ok, EQ);
__ CompareImmediate(value_reg,
reinterpret_cast<intptr_t>(Object::null()));
}
if (ok_is_fall_through) {
__ b(fail, NE);
} else {
__ b(&ok, EQ);
}
} else {
// Both value's and field's class id is known.
if ((value_cid != field_cid) && (value_cid != nullability)) {
if (ok_is_fall_through) {
__ b(fail);
}
} else {
// Nothing to emit.
ASSERT(!compiler->is_optimizing());
return;
}
}
}
if (deopt == NULL) {
ASSERT(!compiler->is_optimizing());
__ Bind(fail);
__ ldr(IP, FieldAddress(field_reg, Field::guarded_cid_offset()));
__ CompareImmediate(IP, kDynamicCid);
__ b(&ok, EQ);
__ Push(field_reg);
__ Push(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());
__ LoadFromOffset(kLoadWord, result,
result, Field::value_offset() - kHeapObjectTag);
}
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 {
UNIMPLEMENTED();
return NULL;
}
void InstanceOfInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
UNIMPLEMENTED();
}
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(R1));
locs->set_out(Location::RegisterLocation(R0));
return locs;
}
void CreateArrayInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
// Allocate the array. R2 = length, R1 = element type.
ASSERT(locs()->in(0).reg() == R1);
__ LoadImmediate(R2, Smi::RawValue(num_elements()));
compiler->GenerateCall(token_pos(),
&StubCode::AllocateArrayLabel(),
PcDescriptors::kOther,
locs());
ASSERT(locs()->out().reg() == R0);
}
LocationSummary*
AllocateObjectWithBoundsCheckInstr::MakeLocationSummary() const {
UNIMPLEMENTED();
return NULL;
}
void AllocateObjectWithBoundsCheckInstr::EmitNativeCode(
FlowGraphCompiler* compiler) {
UNIMPLEMENTED();
}
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();
__ LoadFromOffset(kLoadWord, result_reg,
instance_reg, offset_in_bytes() - kHeapObjectTag);
}
LocationSummary* InstantiateTypeArgumentsInstr::MakeLocationSummary() const {
const intptr_t kNumInputs = 1;
const intptr_t kNumTemps = 1;
LocationSummary* locs =
new LocationSummary(kNumInputs, kNumTemps, LocationSummary::kCall);
locs->set_in(0, Location::RegisterLocation(R0));
locs->set_temp(0, Location::RegisterLocation(R1));
locs->set_out(Location::RegisterLocation(R0));
return locs;
}
void InstantiateTypeArgumentsInstr::EmitNativeCode(
FlowGraphCompiler* compiler) {
Register instantiator_reg = locs()->in(0).reg();
Register temp = locs()->temp(0).reg();
Register result_reg = locs()->out().reg();
// 'instantiator_reg' is the instantiator AbstractTypeArguments object
// (or null).
// 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)) {
__ LoadImmediate(IP, reinterpret_cast<intptr_t>(Object::null()));
__ cmp(instantiator_reg, ShifterOperand(IP));
__ b(&type_arguments_instantiated, EQ);
}
// Instantiate non-null type arguments.
if (type_arguments().IsUninstantiatedIdentity()) {
// Check if the instantiator type argument vector is a TypeArguments of a
// matching length and, if so, use it as the instantiated type_arguments.
// No need to check the instantiator ('instantiator_reg') for null here,
// because a null instantiator will have the wrong class (Null instead of
// TypeArguments).
Label type_arguments_uninstantiated;
__ CompareClassId(instantiator_reg, kTypeArgumentsCid, temp);
__ b(&type_arguments_uninstantiated, NE);
__ ldr(temp,
FieldAddress(instantiator_reg, TypeArguments::length_offset()));
__ CompareImmediate(temp, Smi::RawValue(len));
__ b(&type_arguments_instantiated, EQ);
__ Bind(&type_arguments_uninstantiated);
}
// A runtime call to instantiate the type arguments is required.
__ PushObject(Object::ZoneHandle()); // Make room for the result.
__ PushObject(type_arguments());
__ Push(instantiator_reg); // Push instantiator type arguments.
compiler->GenerateCallRuntime(token_pos(),
deopt_id(),
kInstantiateTypeArgumentsRuntimeEntry,
locs());
__ Drop(2); // Drop instantiator and uninstantiated type arguments.
__ Pop(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 = 1;
LocationSummary* locs =
new LocationSummary(kNumInputs, kNumTemps, LocationSummary::kNoCall);
locs->set_in(0, Location::RequiresRegister());
locs->set_out(Location::SameAsFirstInput());
locs->set_temp(0, Location::RequiresRegister());
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);
Register temp_reg = locs()->temp(0).reg();
// instantiator_reg is the instantiator type argument vector, i.e. an
// AbstractTypeArguments object (or null).
// 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)) {
__ CompareImmediate(instantiator_reg,
reinterpret_cast<intptr_t>(Object::null()));
__ b(&type_arguments_instantiated, EQ);
}
// Instantiate non-null type arguments.
if (type_arguments().IsUninstantiatedIdentity()) {
// Check if the instantiator type argument vector is a TypeArguments of a
// matching length and, if so, use it as the instantiated type_arguments.
// No need to check instantiator_reg for null here, because a null
// instantiator will have the wrong class (Null instead of TypeArguments).
Label type_arguments_uninstantiated;
__ CompareClassId(instantiator_reg, kTypeArgumentsCid, temp_reg);
__ b(&type_arguments_uninstantiated, NE);
__ ldr(temp_reg,
FieldAddress(instantiator_reg, TypeArguments::length_offset()));
__ CompareImmediate(temp_reg, Smi::RawValue(type_arguments().Length()));
__ b(&type_arguments_instantiated, EQ);
__ Bind(&type_arguments_uninstantiated);
}
// 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);
// result_reg: uninstantiated or instantiated type arguments.
}
LocationSummary*
ExtractConstructorInstantiatorInstr::MakeLocationSummary() const {
const intptr_t kNumInputs = 1;
const intptr_t kNumTemps = 1;
LocationSummary* locs =
new LocationSummary(kNumInputs, kNumTemps, LocationSummary::kNoCall);
locs->set_in(0, Location::RequiresRegister());
locs->set_out(Location::SameAsFirstInput());
locs->set_temp(0, Location::RequiresRegister());
return locs;
}
void ExtractConstructorInstantiatorInstr::EmitNativeCode(
FlowGraphCompiler* compiler) {
Register instantiator_reg = locs()->in(0).reg();
ASSERT(locs()->out().reg() == instantiator_reg);
Register temp_reg = locs()->temp(0).reg();
// instantiator_reg is the instantiator AbstractTypeArguments object
// (or null). 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.
Label done;
const intptr_t len = type_arguments().Length();
if (type_arguments().IsRawInstantiatedRaw(len)) {
Label instantiator_not_null;
__ CompareImmediate(instantiator_reg,
reinterpret_cast<intptr_t>(Object::null()));
__ b(&instantiator_not_null, NE);
// Null was used in VisitExtractConstructorTypeArguments as the
// instantiated type arguments, no proper instantiator needed.
__ LoadImmediate(instantiator_reg,
Smi::RawValue(StubCode::kNoInstantiator));
__ b(&done);
__ Bind(&instantiator_not_null);
}
// Instantiate non-null type arguments.
if (type_arguments().IsUninstantiatedIdentity()) {
// TODO(regis): The following emitted code is duplicated in
// VisitExtractConstructorTypeArguments above. The reason is that the code
// is split between two computations, so that each one produces a
// single value, rather than producing a pair of values.
// If this becomes an issue, we should expose these tests at the IL level.
// Check if the instantiator type argument vector is a TypeArguments of a
// matching length and, if so, use it as the instantiated type_arguments.
// No need to check the instantiator ('instantiator_reg') for null here,
// because a null instantiator will have the wrong class (Null instead of
// TypeArguments).
__ CompareClassId(instantiator_reg, kTypeArgumentsCid, temp_reg);
__ b(&done, NE);
__ ldr(temp_reg,
FieldAddress(instantiator_reg, TypeArguments::length_offset()));
__ CompareImmediate(temp_reg, Smi::RawValue(type_arguments().Length()));
__ b(&done, NE);
// The instantiator was used in VisitExtractConstructorTypeArguments as the
// instantiated type arguments, no proper instantiator needed.
__ LoadImmediate(instantiator_reg,
Smi::RawValue(StubCode::kNoInstantiator));
}
__ Bind(&done);
// 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(R1));
locs->set_out(Location::RegisterLocation(R0));
return locs;
}
void AllocateContextInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
ASSERT(locs()->temp(0).reg() == R1);
ASSERT(locs()->out().reg() == R0);
__ LoadImmediate(R1, num_context_variables());
const ExternalLabel label("alloc_context",
StubCode::AllocateContextEntryPoint());
compiler->GenerateCall(token_pos(),
&label,
PcDescriptors::kOther,
locs());
}
LocationSummary* CloneContextInstr::MakeLocationSummary() const {
UNIMPLEMENTED();
return NULL;
}
void CloneContextInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
UNIMPLEMENTED();
}
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 SP from FP 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);
__ AddImmediate(SP, FP, fp_sp_dist);
ASSERT(!exception_var().is_captured());
ASSERT(!stacktrace_var().is_captured());
__ StoreToOffset(kStoreWord, kExceptionObjectReg,
FP, exception_var().index() * kWordSize);
__ StoreToOffset(kStoreWord, kStackTraceObjectReg,
FP, stacktrace_var().index() * kWordSize);
// Restore the pool pointer.
__ LoadPoolPointer();
}
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());
__ b(exit_label());
}
private:
CheckStackOverflowInstr* instruction_;
};
void CheckStackOverflowInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
CheckStackOverflowSlowPath* slow_path = new CheckStackOverflowSlowPath(this);
compiler->AddSlowPathCode(slow_path);
__ LoadImmediate(IP, Isolate::Current()->stack_limit_address());
__ ldr(IP, Address(IP));
__ cmp(SP, ShifterOperand(IP));
__ b(slow_path->entry_label(), LS);
__ Bind(slow_path->exit_label());
}
LocationSummary* BinarySmiOpInstr::MakeLocationSummary() const {
const intptr_t kNumInputs = 2;
if (op_kind() == Token::kTRUNCDIV) {
UNIMPLEMENTED();
return NULL;
} 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()));
// We make use of 3-operand instructions by not requiring result register
// to be identical to first input register as on Intel.
summary->set_out(Location::RequiresRegister());
return summary;
}
}
void BinarySmiOpInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
if (op_kind() == Token::kSHL) {
UNIMPLEMENTED();
return;
}
ASSERT(!is_truncating());
Register left = locs()->in(0).reg();
Register result = locs()->out().reg();
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());
int32_t imm = reinterpret_cast<int32_t>(constant.raw());
switch (op_kind()) {
case Token::kSUB: {
imm = -imm; // TODO(regis): What if deopt != NULL && imm == 0x80000000?
// Fall through.
}
case Token::kADD: {
if (deopt == NULL) {
__ AddImmediate(result, left, imm);
} else {
__ AddImmediateSetFlags(result, left, imm);
__ b(deopt, VS);
}
break;
}
case Token::kMUL: {
// Keep left value tagged and untag right value.
const intptr_t value = Smi::Cast(constant).Value();
if (deopt == NULL) {
if (value == 2) {
__ mov(result, ShifterOperand(left, LSL, 1));
} else {
__ LoadImmediate(IP, value);
__ mul(result, left, IP);
}
} else {
if (value == 2) {
__ mov(IP, ShifterOperand(left, ASR, 31)); // IP = sign of left.
__ mov(result, ShifterOperand(left, LSL, 1));
} else {
__ LoadImmediate(IP, value);
__ smull(result, IP, left, IP);
}
// IP: result bits 32..63.
__ cmp(IP, ShifterOperand(result, ASR, 31));
__ b(deopt, NE);
}
break;
}
case Token::kTRUNCDIV: {
UNIMPLEMENTED();
break;
}
case Token::kBIT_AND: {
// No overflow check.
ShifterOperand shifter_op;
if (ShifterOperand::CanHold(imm, &shifter_op)) {
__ and_(result, left, shifter_op);
} else {
// TODO(regis): Try to use bic.
__ LoadImmediate(IP, imm);
__ and_(result, left, ShifterOperand(IP));
}
break;
}
case Token::kBIT_OR: {
// No overflow check.
ShifterOperand shifter_op;
if (ShifterOperand::CanHold(imm, &shifter_op)) {
__ orr(result, left, shifter_op);
} else {
// TODO(regis): Try to use orn.
__ LoadImmediate(IP, imm);
__ orr(result, left, ShifterOperand(IP));
}
break;
}
case Token::kBIT_XOR: {
// No overflow check.
ShifterOperand shifter_op;
if (ShifterOperand::CanHold(imm, &shifter_op)) {
__ eor(result, left, shifter_op);
} else {
__ LoadImmediate(IP, imm);
__ eor(result, left, ShifterOperand(IP));
}
break;
}
case Token::kSHR: {
UNIMPLEMENTED();
break;
}
default:
UNREACHABLE();
break;
}
return;
}
Register right = locs()->in(1).reg();
switch (op_kind()) {
case Token::kADD: {
if (deopt == NULL) {
__ add(result, left, ShifterOperand(right));
} else {
__ adds(result, left, ShifterOperand(right));
__ b(deopt, VS);
}
break;
}
case Token::kSUB: {
if (deopt == NULL) {
__ sub(result, left, ShifterOperand(right));
} else {
__ subs(result, left, ShifterOperand(right));
__ b(deopt, VS);
}
break;
}
case Token::kMUL: {
__ SmiUntag(left);
__ mul(result, left, right);
if (deopt != NULL) {
UNIMPLEMENTED();
}
break;
}
case Token::kBIT_AND: {
// No overflow check.
__ and_(result, left, ShifterOperand(right));
break;
}
case Token::kBIT_OR: {
// No overflow check.
__ orr(result, left, ShifterOperand(right));
break;
}
case Token::kBIT_XOR: {
// No overflow check.
__ eor(result, left, ShifterOperand(right));
break;
}
case Token::kTRUNCDIV: {
UNIMPLEMENTED();
break;
}
case Token::kSHR: {
UNIMPLEMENTED();
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 {
UNIMPLEMENTED();
return NULL;
}
void CheckEitherNonSmiInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
UNIMPLEMENTED();
}
LocationSummary* BoxDoubleInstr::MakeLocationSummary() const {
UNIMPLEMENTED();
return NULL;
}
void BoxDoubleInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
UNIMPLEMENTED();
}
LocationSummary* UnboxDoubleInstr::MakeLocationSummary() const {
UNIMPLEMENTED();
return NULL;
}
void UnboxDoubleInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
UNIMPLEMENTED();
}
LocationSummary* BoxFloat32x4Instr::MakeLocationSummary() const {
UNIMPLEMENTED();
return NULL;
}
void BoxFloat32x4Instr::EmitNativeCode(FlowGraphCompiler* compiler) {
UNIMPLEMENTED();
}
LocationSummary* UnboxFloat32x4Instr::MakeLocationSummary() const {
UNIMPLEMENTED();
return NULL;
}
void UnboxFloat32x4Instr::EmitNativeCode(FlowGraphCompiler* compiler) {
UNIMPLEMENTED();
}
LocationSummary* BinaryDoubleOpInstr::MakeLocationSummary() const {
UNIMPLEMENTED();
return NULL;
}
void BinaryDoubleOpInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
UNIMPLEMENTED();
}
LocationSummary* BinaryFloat32x4OpInstr::MakeLocationSummary() const {
UNIMPLEMENTED();
return NULL;
}
void BinaryFloat32x4OpInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
UNIMPLEMENTED();
}
LocationSummary* Float32x4ShuffleInstr::MakeLocationSummary() const {
UNIMPLEMENTED();
return NULL;
}
void Float32x4ShuffleInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
UNIMPLEMENTED();
}
LocationSummary* MathSqrtInstr::MakeLocationSummary() const {
UNIMPLEMENTED();
return NULL;
}
void MathSqrtInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
UNIMPLEMENTED();
}
LocationSummary* UnarySmiOpInstr::MakeLocationSummary() const {
UNIMPLEMENTED();
return NULL;
}
void UnarySmiOpInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
UNIMPLEMENTED();
}
LocationSummary* SmiToDoubleInstr::MakeLocationSummary() const {
UNIMPLEMENTED();
return NULL;
}
void SmiToDoubleInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
UNIMPLEMENTED();
}
LocationSummary* DoubleToIntegerInstr::MakeLocationSummary() const {
UNIMPLEMENTED();
return NULL;
}
void DoubleToIntegerInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
UNIMPLEMENTED();
}
LocationSummary* DoubleToSmiInstr::MakeLocationSummary() const {
UNIMPLEMENTED();
return NULL;
}
void DoubleToSmiInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
UNIMPLEMENTED();
}
LocationSummary* DoubleToDoubleInstr::MakeLocationSummary() const {
UNIMPLEMENTED();
return NULL;
}
void DoubleToDoubleInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
UNIMPLEMENTED();
}
LocationSummary* InvokeMathCFunctionInstr::MakeLocationSummary() const {
UNIMPLEMENTED();
return NULL;
}
void InvokeMathCFunctionInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
UNIMPLEMENTED();
}
LocationSummary* PolymorphicInstanceCallInstr::MakeLocationSummary() const {
return MakeCallSummary();
}
void PolymorphicInstanceCallInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
Label* deopt = compiler->AddDeoptStub(instance_call()->deopt_id(),
kDeoptPolymorphicInstanceCallTestFail);
if (ic_data().NumberOfChecks() == 0) {
__ b(deopt);
return;
}
ASSERT(ic_data().num_args_tested() == 1);
if (!with_checks()) {
ASSERT(ic_data().HasOneTarget());
const Function& target = Function::ZoneHandle(ic_data().GetTargetAt(0));
compiler->GenerateStaticCall(instance_call()->deopt_id(),
instance_call()->token_pos(),
target,
instance_call()->ArgumentCount(),
instance_call()->argument_names(),
locs());
return;
}
// Load receiver into R0.
__ ldr(R0, Address(SP, (instance_call()->ArgumentCount() - 1) * kWordSize));
LoadValueCid(compiler, R2, R0,
(ic_data().GetReceiverClassIdAt(0) == kSmiCid) ? NULL : deopt);
compiler->EmitTestAndCall(ic_data(),
R2, // Class id register.
instance_call()->ArgumentCount(),
instance_call()->argument_names(),
deopt,
instance_call()->deopt_id(),
instance_call()->token_pos(),
locs());
}
LocationSummary* BranchInstr::MakeLocationSummary() const {
UNREACHABLE();
return NULL;
}
void BranchInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
comparison()->EmitBranchCode(compiler, this);
}
LocationSummary* CheckClassInstr::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());
if (!null_check()) {
summary->AddTemp(Location::RequiresRegister());
}
return summary;
}
void CheckClassInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
if (null_check()) {
Label* deopt = compiler->AddDeoptStub(deopt_id(),
kDeoptCheckClass);
__ CompareImmediate(locs()->in(0).reg(),
reinterpret_cast<intptr_t>(Object::null()));
__ b(deopt, EQ);
return;
}
ASSERT((unary_checks().GetReceiverClassIdAt(0) != kSmiCid) ||
(unary_checks().NumberOfChecks() > 1));
Register value = locs()->in(0).reg();
Register temp = locs()->temp(0).reg();
Label* deopt = compiler->AddDeoptStub(deopt_id(),
kDeoptCheckClass);
Label is_ok;
intptr_t cix = 0;
if (unary_checks().GetReceiverClassIdAt(cix) == kSmiCid) {
__ tst(value, ShifterOperand(kSmiTagMask));
__ b(&is_ok, EQ);
cix++; // Skip first check.
} else {
__ tst(value, ShifterOperand(kSmiTagMask));
__ b(deopt, EQ);
}
__ LoadClassId(temp, value);
const intptr_t num_checks = unary_checks().NumberOfChecks();
for (intptr_t i = cix; i < num_checks; i++) {
ASSERT(unary_checks().GetReceiverClassIdAt(i) != kSmiCid);
__ CompareImmediate(temp, unary_checks().GetReceiverClassIdAt(i));
if (i == (num_checks - 1)) {
__ b(deopt, NE);
} else {
__ b(&is_ok, EQ);
}
}
__ Bind(&is_ok);
}
LocationSummary* CheckSmiInstr::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());
return summary;
}
void CheckSmiInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
Register value = locs()->in(0).reg();
Label* deopt = compiler->AddDeoptStub(deopt_id(),
kDeoptCheckSmi);
__ tst(value, ShifterOperand(kSmiTagMask));
__ b(deopt, NE);
}
LocationSummary* CheckArrayBoundInstr::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::RegisterOrSmiConstant(length()));
locs->set_in(1, Location::RegisterOrSmiConstant(index()));
return locs;
}
void CheckArrayBoundInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
Label* deopt = compiler->AddDeoptStub(deopt_id(),
kDeoptCheckArrayBound);
if (locs()->in(0).IsConstant() && locs()->in(1).IsConstant()) {
// Unconditionally deoptimize for constant bounds checks because they
// only occur only when index is out-of-bounds.
__ b(deopt);
return;
}
if (locs()->in(1).IsConstant()) {
Register length = locs()->in(0).reg();
const Object& constant = locs()->in(1).constant();
ASSERT(constant.IsSmi());
__ CompareImmediate(length, reinterpret_cast<int32_t>(constant.raw()));
__ b(deopt, LS);
} else if (locs()->in(0).IsConstant()) {
ASSERT(locs()->in(0).constant().IsSmi());
const Smi& smi_const = Smi::Cast(locs()->in(0).constant());
Register index = locs()->in(1).reg();
__ CompareImmediate(index, reinterpret_cast<int32_t>(smi_const.raw()));
__ b(deopt, CS);
} else {
Register length = locs()->in(0).reg();
Register index = locs()->in(1).reg();
__ cmp(index, ShifterOperand(length));
__ b(deopt, CS);
}
}
LocationSummary* UnboxIntegerInstr::MakeLocationSummary() const {
UNIMPLEMENTED();
return NULL;
}
void UnboxIntegerInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
UNIMPLEMENTED();
}
LocationSummary* BoxIntegerInstr::MakeLocationSummary() const {
UNIMPLEMENTED();
return NULL;
}
void BoxIntegerInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
UNIMPLEMENTED();
}
LocationSummary* BinaryMintOpInstr::MakeLocationSummary() const {
UNIMPLEMENTED();
return NULL;
}
void BinaryMintOpInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
UNIMPLEMENTED();
}
LocationSummary* ShiftMintOpInstr::MakeLocationSummary() const {
UNIMPLEMENTED();
return NULL;
}
void ShiftMintOpInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
UNIMPLEMENTED();
}
LocationSummary* UnaryMintOpInstr::MakeLocationSummary() const {
UNIMPLEMENTED();
return NULL;
}
void UnaryMintOpInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
UNIMPLEMENTED();
}
LocationSummary* ThrowInstr::MakeLocationSummary() const {
return new LocationSummary(0, 0, LocationSummary::kCall);
}
void ThrowInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
compiler->GenerateCallRuntime(token_pos(),
deopt_id(),
kThrowRuntimeEntry,
locs());
__ bkpt(0);
}
LocationSummary* ReThrowInstr::MakeLocationSummary() const {
return new LocationSummary(0, 0, LocationSummary::kCall);
}
void ReThrowInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
compiler->GenerateCallRuntime(token_pos(),
deopt_id(),
kReThrowRuntimeEntry,
locs());
__ bkpt(0);
}
LocationSummary* GotoInstr::MakeLocationSummary() const {
return new LocationSummary(0, 0, LocationSummary::kNoCall);
}
void GotoInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
// Add deoptimization descriptor for deoptimizing instructions
// that may be inserted before this instruction.
if (!compiler->is_optimizing()) {
compiler->AddCurrentDescriptor(PcDescriptors::kDeopt,
GetDeoptId(),
0); // No token position.
}
if (HasParallelMove()) {
compiler->parallel_move_resolver()->EmitNativeCode(parallel_move());
}
// We can fall through if the successor is the next block in the list.
// Otherwise, we need a jump.
if (!compiler->CanFallThroughTo(successor())) {
__ b(compiler->GetJumpLabel(successor()));
}
}
void ControlInstruction::EmitBranchOnValue(FlowGraphCompiler* compiler,
bool value) {
if (value && !compiler->CanFallThroughTo(true_successor())) {
__ b(compiler->GetJumpLabel(true_successor()));
} else if (!value && !compiler->CanFallThroughTo(false_successor())) {
__ b(compiler->GetJumpLabel(false_successor()));
}
}
void ControlInstruction::EmitBranchOnCondition(FlowGraphCompiler* compiler,
Condition true_condition) {
if (compiler->CanFallThroughTo(false_successor())) {
// If the next block is the false successor we will fall through to it.
__ b(compiler->GetJumpLabel(true_successor()), true_condition);
} else {
// If the next block is the true successor we negate comparison and fall
// through to it.
Condition false_condition = NegateCondition(true_condition);
__ b(compiler->GetJumpLabel(false_successor()), false_condition);
// Fall through or jump to the true successor.
if (!compiler->CanFallThroughTo(true_successor())) {
__ b(compiler->GetJumpLabel(true_successor()));
}
}
}
LocationSummary* CurrentContextInstr::MakeLocationSummary() const {
return LocationSummary::Make(0,
Location::RequiresRegister(),
LocationSummary::kNoCall);
}
void CurrentContextInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
__ mov(locs()->out().reg(), ShifterOperand(CTX));
}
LocationSummary* StrictCompareInstr::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::RegisterOrConstant(left()));
locs->set_in(1, Location::RegisterOrConstant(right()));
locs->set_out(Location::RequiresRegister());
return locs;
}
// Special code for numbers (compare values instead of references.)
void StrictCompareInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
ASSERT(kind() == Token::kEQ_STRICT || kind() == Token::kNE_STRICT);
Location left = locs()->in(0);
Location right = locs()->in(1);
if (left.IsConstant() && right.IsConstant()) {
// TODO(vegorov): should be eliminated earlier by constant propagation.
const bool result = (kind() == Token::kEQ_STRICT) ?
left.constant().raw() == right.constant().raw() :
left.constant().raw() != right.constant().raw();
__ LoadObject(locs()->out().reg(), result ? Bool::True() : Bool::False());
return;
}
if (left.IsConstant()) {
compiler->EmitEqualityRegConstCompare(right.reg(),
left.constant(),
needs_number_check());
} else if (right.IsConstant()) {
compiler->EmitEqualityRegConstCompare(left.reg(),
right.constant(),
needs_number_check());
} else {
compiler->EmitEqualityRegRegCompare(left.reg(),
right.reg(),
needs_number_check());
}
Register result = locs()->out().reg();
Condition true_condition = (kind() == Token::kEQ_STRICT) ? EQ : NE;
__ LoadObject(result, Bool::True(), true_condition);
__ LoadObject(result, Bool::False(), NegateCondition(true_condition));
}
void StrictCompareInstr::EmitBranchCode(FlowGraphCompiler* compiler,
BranchInstr* branch) {
ASSERT(kind() == Token::kEQ_STRICT || kind() == Token::kNE_STRICT);
Location left = locs()->in(0);
Location right = locs()->in(1);
if (left.IsConstant() && right.IsConstant()) {
// TODO(vegorov): should be eliminated earlier by constant propagation.
const bool result = (kind() == Token::kEQ_STRICT) ?
left.constant().raw() == right.constant().raw() :
left.constant().raw() != right.constant().raw();
branch->EmitBranchOnValue(compiler, result);
return;
}
if (left.IsConstant()) {
compiler->EmitEqualityRegConstCompare(right.reg(),
left.constant(),
needs_number_check());
} else if (right.IsConstant()) {
compiler->EmitEqualityRegConstCompare(left.reg(),
right.constant(),
needs_number_check());
} else {
compiler->EmitEqualityRegRegCompare(left.reg(),
right.reg(),
needs_number_check());
}
Condition true_condition = (kind() == Token::kEQ_STRICT) ? EQ : NE;
branch->EmitBranchOnCondition(compiler, true_condition);
}
LocationSummary* BooleanNegateInstr::MakeLocationSummary() const {
return LocationSummary::Make(1,
Location::RequiresRegister(),
LocationSummary::kNoCall);
}
void BooleanNegateInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
Register value = locs()->in(0).reg();
Register result = locs()->out().reg();
__ LoadObject(result, Bool::True());
__ cmp(result, ShifterOperand(value));
__ LoadObject(result, Bool::False(), EQ);
}
LocationSummary* ChainContextInstr::MakeLocationSummary() const {
return LocationSummary::Make(1,
Location::NoLocation(),
LocationSummary::kNoCall);
}
void ChainContextInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
Register context_value = locs()->in(0).reg();
// Chain the new context in context_value to its parent in CTX.
__ StoreIntoObject(context_value,
FieldAddress(context_value, Context::parent_offset()),
CTX);
// Set new context as current context.
__ mov(CTX, ShifterOperand(context_value));
}
LocationSummary* StoreVMFieldInstr::MakeLocationSummary() const {
const intptr_t kNumInputs = 2;
const intptr_t kNumTemps = 0;
LocationSummary* locs =
new LocationSummary(kNumInputs, kNumTemps, LocationSummary::kNoCall);
locs->set_in(0, value()->NeedsStoreBuffer() ? Location::WritableRegister()
: Location::RequiresRegister());
locs->set_in(1, Location::RequiresRegister());
return locs;
}
void StoreVMFieldInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
Register value_reg = locs()->in(0).reg();
Register dest_reg = locs()->in(1).reg();
if (value()->NeedsStoreBuffer()) {
__ StoreIntoObject(dest_reg, FieldAddress(dest_reg, offset_in_bytes()),
value_reg);
} else {
__ StoreIntoObjectNoBarrier(
dest_reg, FieldAddress(dest_reg, offset_in_bytes()), value_reg);
}
}
LocationSummary* AllocateObjectInstr::MakeLocationSummary() const {
return MakeCallSummary();
}
void AllocateObjectInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
const Class& cls = Class::ZoneHandle(constructor().Owner());
const Code& stub = Code::Handle(StubCode::GetAllocationStubForClass(cls));
const ExternalLabel label(cls.ToCString(), stub.EntryPoint());
compiler->GenerateCall(token_pos(),
&label,
PcDescriptors::kOther,
locs());
__ Drop(ArgumentCount()); // Discard arguments.
}
LocationSummary* CreateClosureInstr::MakeLocationSummary() const {
return MakeCallSummary();
}
void CreateClosureInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
const Function& closure_function = function();
ASSERT(!closure_function.IsImplicitStaticClosureFunction());
const Code& stub = Code::Handle(
StubCode::GetAllocationStubForClosure(closure_function));
const ExternalLabel label(closure_function.ToCString(), stub.EntryPoint());
compiler->GenerateCall(token_pos(),
&label,
PcDescriptors::kOther,
locs());
__ Drop(2); // Discard type arguments and receiver.
}
} // namespace dart
#endif // defined TARGET_ARCH_ARM
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