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dart / sdk.git / refs/tags/0.7.6.3 / . / runtime / vm / flow_graph_compiler_mips.cc
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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_MIPS.
#if defined(TARGET_ARCH_MIPS)
#include "vm/flow_graph_compiler.h"
#include "vm/ast_printer.h"
#include "vm/dart_entry.h"
#include "vm/deopt_instructions.h"
#include "vm/il_printer.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"
namespace dart {
DEFINE_FLAG(bool, trap_on_deoptimization, false, "Trap on deoptimization.");
DECLARE_FLAG(int, optimization_counter_threshold);
DECLARE_FLAG(int, reoptimization_counter_threshold);
DECLARE_FLAG(bool, print_ast);
DECLARE_FLAG(bool, print_scopes);
DECLARE_FLAG(bool, enable_type_checks);
DECLARE_FLAG(bool, eliminate_type_checks);
FlowGraphCompiler::~FlowGraphCompiler() {
// BlockInfos are zone-allocated, so their destructors are not called.
// Verify the labels explicitly here.
for (int i = 0; i < block_info_.length(); ++i) {
ASSERT(!block_info_[i]->jump_label()->IsLinked());
}
}
bool FlowGraphCompiler::SupportsUnboxedMints() {
return false;
}
RawDeoptInfo* CompilerDeoptInfo::CreateDeoptInfo(FlowGraphCompiler* compiler,
DeoptInfoBuilder* builder,
const Array& deopt_table) {
if (deopt_env_ == NULL) return DeoptInfo::null();
intptr_t stack_height = compiler->StackSize();
AllocateIncomingParametersRecursive(deopt_env_, &stack_height);
intptr_t slot_ix = 0;
Environment* current = deopt_env_;
// Emit all kMaterializeObject instructions describing objects to be
// materialized on the deoptimization as a prefix to the deoptimization info.
EmitMaterializations(deopt_env_, builder);
// The real frame starts here.
builder->MarkFrameStart();
// Current PP, FP, and PC.
builder->AddPp(current->function(), slot_ix++);
builder->AddCallerFp(slot_ix++);
builder->AddReturnAddress(current->function(), deopt_id(), slot_ix++);
// Callee's PC marker is not used anymore. Pass Function::null() to set to 0.
builder->AddPcMarker(Function::Handle(), slot_ix++);
// Emit all values that are needed for materialization as a part of the
// expression stack for the bottom-most frame. This guarantees that GC
// will be able to find them during materialization.
slot_ix = builder->EmitMaterializationArguments(slot_ix);
// For the innermost environment, set outgoing arguments and the locals.
for (intptr_t i = current->Length() - 1;
i >= current->fixed_parameter_count();
i--) {
builder->AddCopy(current->ValueAt(i), current->LocationAt(i), slot_ix++);
}
Environment* previous = current;
current = current->outer();
while (current != NULL) {
// PP, FP, and PC.
builder->AddPp(current->function(), slot_ix++);
builder->AddCallerFp(slot_ix++);
// For any outer environment the deopt id is that of the call instruction
// which is recorded in the outer environment.
builder->AddReturnAddress(current->function(),
Isolate::ToDeoptAfter(current->deopt_id()),
slot_ix++);
// PC marker.
builder->AddPcMarker(previous->function(), slot_ix++);
// The values of outgoing arguments can be changed from the inlined call so
// we must read them from the previous environment.
for (intptr_t i = previous->fixed_parameter_count() - 1; i >= 0; i--) {
builder->AddCopy(previous->ValueAt(i),
previous->LocationAt(i),
slot_ix++);
}
// Set the locals, note that outgoing arguments are not in the environment.
for (intptr_t i = current->Length() - 1;
i >= current->fixed_parameter_count();
i--) {
builder->AddCopy(current->ValueAt(i),
current->LocationAt(i),
slot_ix++);
}
// Iterate on the outer environment.
previous = current;
current = current->outer();
}
// The previous pointer is now the outermost environment.
ASSERT(previous != NULL);
// For the outermost environment, set caller PC, caller PP, and caller FP.
builder->AddCallerPp(slot_ix++);
builder->AddCallerFp(slot_ix++);
builder->AddCallerPc(slot_ix++);
// PC marker.
builder->AddPcMarker(previous->function(), slot_ix++);
// For the outermost environment, set the incoming arguments.
for (intptr_t i = previous->fixed_parameter_count() - 1; i >= 0; i--) {
builder->AddCopy(previous->ValueAt(i), previous->LocationAt(i), slot_ix++);
}
const DeoptInfo& deopt_info =
DeoptInfo::Handle(builder->CreateDeoptInfo(deopt_table));
return deopt_info.raw();
}
void CompilerDeoptInfoWithStub::GenerateCode(FlowGraphCompiler* compiler,
intptr_t stub_ix) {
// Calls do not need stubs, they share a deoptimization trampoline.
ASSERT(reason() != kDeoptAtCall);
Assembler* assem = compiler->assembler();
#define __ assem->
__ Comment("Deopt stub for id %" Pd "", deopt_id());
__ Bind(entry_label());
if (FLAG_trap_on_deoptimization) __ break_(0);
ASSERT(deopt_env() != NULL);
__ BranchLink(&StubCode::DeoptimizeLabel());
set_pc_offset(assem->CodeSize());
#undef __
}
#define __ assembler()->
// Fall through if bool_register contains null.
void FlowGraphCompiler::GenerateBoolToJump(Register bool_register,
Label* is_true,
Label* is_false) {
__ TraceSimMsg("BoolToJump");
Label fall_through;
__ BranchEqual(bool_register, reinterpret_cast<int32_t>(Object::null()),
&fall_through);
__ BranchEqual(bool_register, Bool::True(), is_true);
__ b(is_false);
__ Bind(&fall_through);
}
// A0: instance (must be preserved).
// A1: instantiator type arguments (if used).
RawSubtypeTestCache* FlowGraphCompiler::GenerateCallSubtypeTestStub(
TypeTestStubKind test_kind,
Register instance_reg,
Register type_arguments_reg,
Register temp_reg,
Label* is_instance_lbl,
Label* is_not_instance_lbl) {
__ TraceSimMsg("CallSubtypeTestStub");
ASSERT(instance_reg == A0);
ASSERT(temp_reg == kNoRegister); // Unused on MIPS.
const SubtypeTestCache& type_test_cache =
SubtypeTestCache::ZoneHandle(SubtypeTestCache::New());
__ LoadObject(A2, type_test_cache);
if (test_kind == kTestTypeOneArg) {
ASSERT(type_arguments_reg == kNoRegister);
__ LoadImmediate(A1, reinterpret_cast<int32_t>(Object::null()));
__ BranchLink(&StubCode::Subtype1TestCacheLabel());
} else if (test_kind == kTestTypeTwoArgs) {
ASSERT(type_arguments_reg == kNoRegister);
__ LoadImmediate(A1, reinterpret_cast<int32_t>(Object::null()));
__ BranchLink(&StubCode::Subtype2TestCacheLabel());
} else if (test_kind == kTestTypeThreeArgs) {
ASSERT(type_arguments_reg == A1);
__ BranchLink(&StubCode::Subtype3TestCacheLabel());
} else {
UNREACHABLE();
}
// Result is in V0: null -> not found, otherwise Bool::True or Bool::False.
GenerateBoolToJump(V0, is_instance_lbl, is_not_instance_lbl);
return type_test_cache.raw();
}
// Jumps to labels 'is_instance' or 'is_not_instance' respectively, if
// type test is conclusive, otherwise fallthrough if a type test could not
// be completed.
// A0: instance being type checked (preserved).
// Clobbers T0.
RawSubtypeTestCache*
FlowGraphCompiler::GenerateInstantiatedTypeWithArgumentsTest(
intptr_t token_pos,
const AbstractType& type,
Label* is_instance_lbl,
Label* is_not_instance_lbl) {
__ Comment("InstantiatedTypeWithArgumentsTest");
ASSERT(type.IsInstantiated());
const Class& type_class = Class::ZoneHandle(type.type_class());
ASSERT(type_class.HasTypeArguments() || type_class.IsSignatureClass());
const Register kInstanceReg = A0;
Error& malformed_error = Error::Handle();
const Type& int_type = Type::Handle(Type::IntType());
const bool smi_is_ok = int_type.IsSubtypeOf(type, &malformed_error);
// Malformed type should have been handled at graph construction time.
ASSERT(smi_is_ok || malformed_error.IsNull());
__ andi(CMPRES, kInstanceReg, Immediate(kSmiTagMask));
if (smi_is_ok) {
__ beq(CMPRES, ZR, is_instance_lbl);
} else {
__ beq(CMPRES, ZR, is_not_instance_lbl);
}
const AbstractTypeArguments& type_arguments =
AbstractTypeArguments::ZoneHandle(type.arguments());
const bool is_raw_type = type_arguments.IsNull() ||
type_arguments.IsRaw(type_arguments.Length());
// Signature class is an instantiated parameterized type.
if (!type_class.IsSignatureClass()) {
if (is_raw_type) {
const Register kClassIdReg = T0;
// dynamic type argument, check only classes.
__ LoadClassId(kClassIdReg, kInstanceReg);
__ BranchEqual(kClassIdReg, type_class.id(), is_instance_lbl);
// List is a very common case.
if (IsListClass(type_class)) {
GenerateListTypeCheck(kClassIdReg, is_instance_lbl);
}
return GenerateSubtype1TestCacheLookup(
token_pos, type_class, is_instance_lbl, is_not_instance_lbl);
}
// If one type argument only, check if type argument is Object or dynamic.
if (type_arguments.Length() == 1) {
const AbstractType& tp_argument = AbstractType::ZoneHandle(
type_arguments.TypeAt(0));
ASSERT(!tp_argument.IsMalformed());
if (tp_argument.IsType()) {
ASSERT(tp_argument.HasResolvedTypeClass());
// Check if type argument is dynamic or Object.
const Type& object_type = Type::Handle(Type::ObjectType());
if (object_type.IsSubtypeOf(tp_argument, NULL)) {
// Instance class test only necessary.
return GenerateSubtype1TestCacheLookup(
token_pos, type_class, is_instance_lbl, is_not_instance_lbl);
}
}
}
}
// Regular subtype test cache involving instance's type arguments.
const Register kTypeArgumentsReg = kNoRegister;
const Register kTempReg = kNoRegister;
// A0: instance (must be preserved).
return GenerateCallSubtypeTestStub(kTestTypeTwoArgs,
kInstanceReg,
kTypeArgumentsReg,
kTempReg,
is_instance_lbl,
is_not_instance_lbl);
}
void FlowGraphCompiler::CheckClassIds(Register class_id_reg,
const GrowableArray<intptr_t>& class_ids,
Label* is_equal_lbl,
Label* is_not_equal_lbl) {
__ TraceSimMsg("CheckClassIds");
for (intptr_t i = 0; i < class_ids.length(); i++) {
__ BranchEqual(class_id_reg, class_ids[i], is_equal_lbl);
}
__ b(is_not_equal_lbl);
}
// Testing against an instantiated type with no arguments, without
// SubtypeTestCache.
// A0: instance being type checked (preserved).
// Clobbers: T0, T1, T2
// Returns true if there is a fallthrough.
bool FlowGraphCompiler::GenerateInstantiatedTypeNoArgumentsTest(
intptr_t token_pos,
const AbstractType& type,
Label* is_instance_lbl,
Label* is_not_instance_lbl) {
__ TraceSimMsg("InstantiatedTypeNoArgumentsTest");
__ Comment("InstantiatedTypeNoArgumentsTest");
ASSERT(type.IsInstantiated());
const Class& type_class = Class::Handle(type.type_class());
ASSERT(!type_class.HasTypeArguments());
const Register kInstanceReg = A0;
__ andi(T0, A0, Immediate(kSmiTagMask));
// If instance is Smi, check directly.
const Class& smi_class = Class::Handle(Smi::Class());
if (smi_class.IsSubtypeOf(TypeArguments::Handle(),
type_class,
TypeArguments::Handle(),
NULL)) {
__ beq(T0, ZR, is_instance_lbl);
} else {
__ beq(T0, ZR, is_not_instance_lbl);
}
// Compare if the classes are equal.
const Register kClassIdReg = T0;
__ LoadClassId(kClassIdReg, kInstanceReg);
__ BranchEqual(kClassIdReg, type_class.id(), is_instance_lbl);
// See ClassFinalizer::ResolveSuperTypeAndInterfaces for list of restricted
// interfaces.
// Bool interface can be implemented only by core class Bool.
if (type.IsBoolType()) {
__ BranchEqual(kClassIdReg, kBoolCid, is_instance_lbl);
__ b(is_not_instance_lbl);
return false;
}
if (type.IsFunctionType()) {
// Check if instance is a closure.
__ LoadClassById(T1, kClassIdReg);
__ lw(T1, FieldAddress(T1, Class::signature_function_offset()));
__ BranchNotEqual(T1, reinterpret_cast<int32_t>(Object::null()),
is_instance_lbl);
}
// Custom checking for numbers (Smi, Mint, Bigint and Double).
// Note that instance is not Smi (checked above).
if (type.IsSubtypeOf(Type::Handle(Type::Number()), NULL)) {
GenerateNumberTypeCheck(
kClassIdReg, type, is_instance_lbl, is_not_instance_lbl);
return false;
}
if (type.IsStringType()) {
GenerateStringTypeCheck(kClassIdReg, is_instance_lbl, is_not_instance_lbl);
return false;
}
// Otherwise fallthrough.
return true;
}
// Uses SubtypeTestCache to store instance class and result.
// A0: instance to test.
// Clobbers A1, A2, T0-T3.
// Immediate class test already done.
// TODO(srdjan): Implement a quicker subtype check, as type test
// arrays can grow too high, but they may be useful when optimizing
// code (type-feedback).
RawSubtypeTestCache* FlowGraphCompiler::GenerateSubtype1TestCacheLookup(
intptr_t token_pos,
const Class& type_class,
Label* is_instance_lbl,
Label* is_not_instance_lbl) {
__ TraceSimMsg("Subtype1TestCacheLookup");
__ Comment("Subtype1TestCacheLookup");
const Register kInstanceReg = A0;
__ LoadClass(T0, kInstanceReg);
// T0: instance class.
// Check immediate superclass equality.
__ lw(T0, FieldAddress(T0, Class::super_type_offset()));
__ lw(T0, FieldAddress(T0, Type::type_class_offset()));
__ BranchEqual(T0, type_class, is_instance_lbl);
const Register kTypeArgumentsReg = kNoRegister;
const Register kTempReg = kNoRegister;
return GenerateCallSubtypeTestStub(kTestTypeOneArg,
kInstanceReg,
kTypeArgumentsReg,
kTempReg,
is_instance_lbl,
is_not_instance_lbl);
}
// Generates inlined check if 'type' is a type parameter or type itself
// A0: instance (preserved).
RawSubtypeTestCache* FlowGraphCompiler::GenerateUninstantiatedTypeTest(
intptr_t token_pos,
const AbstractType& type,
Label* is_instance_lbl,
Label* is_not_instance_lbl) {
__ TraceSimMsg("UninstantiatedTypeTest");
__ Comment("UninstantiatedTypeTest");
ASSERT(!type.IsInstantiated());
// Skip check if destination is a dynamic type.
if (type.IsTypeParameter()) {
const TypeParameter& type_param = TypeParameter::Cast(type);
// Load instantiator (or null) and instantiator type arguments on stack.
__ lw(A1, Address(SP, 0)); // Get instantiator type arguments.
// A1: instantiator type arguments.
// Check if type argument is dynamic.
__ LoadImmediate(T7, reinterpret_cast<int32_t>(Object::null()));
__ beq(A1, T7, is_instance_lbl);
// Can handle only type arguments that are instances of TypeArguments.
// (runtime checks canonicalize type arguments).
Label fall_through;
__ LoadClassId(T2, A1);
__ BranchNotEqual(T2, kTypeArgumentsCid, &fall_through);
__ lw(T2,
FieldAddress(A1, TypeArguments::type_at_offset(type_param.index())));
// R2: concrete type of type.
// Check if type argument is dynamic.
__ BranchEqual(T2, Type::ZoneHandle(Type::DynamicType()), is_instance_lbl);
__ beq(T2, T7, is_instance_lbl);
const Type& object_type = Type::ZoneHandle(Type::ObjectType());
__ BranchEqual(T2, object_type, is_instance_lbl);
// For Smi check quickly against int and num interfaces.
Label not_smi;
__ andi(CMPRES, A0, Immediate(kSmiTagMask));
__ bne(CMPRES, ZR, &not_smi); // Value is Smi?
__ BranchEqual(T2, Type::ZoneHandle(Type::IntType()), is_instance_lbl);
__ BranchEqual(T2, Type::ZoneHandle(Type::Number()), is_instance_lbl);
// Smi must be handled in runtime.
__ b(&fall_through);
__ Bind(&not_smi);
// T1: instantiator type arguments.
// A0: instance.
const Register kInstanceReg = A0;
const Register kTypeArgumentsReg = A1;
const Register kTempReg = kNoRegister;
const SubtypeTestCache& type_test_cache =
SubtypeTestCache::ZoneHandle(
GenerateCallSubtypeTestStub(kTestTypeThreeArgs,
kInstanceReg,
kTypeArgumentsReg,
kTempReg,
is_instance_lbl,
is_not_instance_lbl));
__ Bind(&fall_through);
return type_test_cache.raw();
}
if (type.IsType()) {
const Register kInstanceReg = A0;
const Register kTypeArgumentsReg = A1;
__ andi(CMPRES, kInstanceReg, Immediate(kSmiTagMask));
__ beq(CMPRES, ZR, is_not_instance_lbl); // Is instance Smi?
__ lw(kTypeArgumentsReg, Address(SP, 0)); // Instantiator type args.
// Uninstantiated type class is known at compile time, but the type
// arguments are determined at runtime by the instantiator.
const Register kTempReg = kNoRegister;
return GenerateCallSubtypeTestStub(kTestTypeThreeArgs,
kInstanceReg,
kTypeArgumentsReg,
kTempReg,
is_instance_lbl,
is_not_instance_lbl);
}
return SubtypeTestCache::null();
}
// Inputs:
// - A0: instance being type checked (preserved).
// - A1: optional instantiator type arguments (preserved).
// Returns:
// - preserved instance in A0 and optional instantiator type arguments in A1.
// Clobbers: T0, T1, T2
// Note that this inlined code must be followed by the runtime_call code, as it
// may fall through to it. Otherwise, this inline code will jump to the label
// is_instance or to the label is_not_instance.
RawSubtypeTestCache* FlowGraphCompiler::GenerateInlineInstanceof(
intptr_t token_pos,
const AbstractType& type,
Label* is_instance_lbl,
Label* is_not_instance_lbl) {
__ TraceSimMsg("InlineInstanceof");
__ Comment("InlineInstanceof");
if (type.IsVoidType()) {
// A non-null value is returned from a void function, which will result in a
// type error. A null value is handled prior to executing this inline code.
return SubtypeTestCache::null();
}
if (TypeCheckAsClassEquality(type)) {
const intptr_t type_cid = Class::Handle(type.type_class()).id();
const Register kInstanceReg = A0;
__ andi(CMPRES, kInstanceReg, Immediate(kSmiTagMask));
if (type_cid == kSmiCid) {
__ beq(CMPRES, ZR, is_instance_lbl);
} else {
__ beq(CMPRES, ZR, is_not_instance_lbl);
__ LoadClassId(T0, kInstanceReg);
__ BranchEqual(T0, type_cid, is_instance_lbl);
}
__ b(is_not_instance_lbl);
return SubtypeTestCache::null();
}
if (type.IsInstantiated()) {
const Class& type_class = Class::ZoneHandle(type.type_class());
// A class equality check is only applicable with a dst type of a
// non-parameterized class, non-signature class, or with a raw dst type of
// a parameterized class.
if (type_class.IsSignatureClass() || type_class.HasTypeArguments()) {
return GenerateInstantiatedTypeWithArgumentsTest(token_pos,
type,
is_instance_lbl,
is_not_instance_lbl);
// Fall through to runtime call.
}
const bool has_fall_through =
GenerateInstantiatedTypeNoArgumentsTest(token_pos,
type,
is_instance_lbl,
is_not_instance_lbl);
if (has_fall_through) {
// If test non-conclusive so far, try the inlined type-test cache.
// 'type' is known at compile time.
return GenerateSubtype1TestCacheLookup(
token_pos, type_class, is_instance_lbl, is_not_instance_lbl);
} else {
return SubtypeTestCache::null();
}
}
return GenerateUninstantiatedTypeTest(token_pos,
type,
is_instance_lbl,
is_not_instance_lbl);
}
// If instanceof type test cannot be performed successfully at compile time and
// therefore eliminated, optimize it by adding inlined tests for:
// - NULL -> return false.
// - Smi -> compile time subtype check (only if dst class is not parameterized).
// - Class equality (only if class is not parameterized).
// Inputs:
// - A0: object.
// - A1: instantiator type arguments or raw_null.
// - A2: instantiator or raw_null.
// Returns:
// - true or false in V0.
void FlowGraphCompiler::GenerateInstanceOf(intptr_t token_pos,
intptr_t deopt_id,
const AbstractType& type,
bool negate_result,
LocationSummary* locs) {
ASSERT(type.IsFinalized() && !type.IsMalformed() && !type.IsMalbounded());
// Preserve instantiator (A2) and its type arguments (A1).
__ addiu(SP, SP, Immediate(-2 * kWordSize));
__ sw(A2, Address(SP, 1 * kWordSize));
__ sw(A1, Address(SP, 0 * kWordSize));
Label is_instance, is_not_instance;
// If type is instantiated and non-parameterized, we can inline code
// checking whether the tested instance is a Smi.
if (type.IsInstantiated()) {
// A null object is only an instance of Object and dynamic, which has
// already been checked above (if the type is instantiated). So we can
// return false here if the instance is null (and if the type is
// instantiated).
// We can only inline this null check if the type is instantiated at compile
// time, since an uninstantiated type at compile time could be Object or
// dynamic at run time.
__ BranchEqual(A0, reinterpret_cast<int32_t>(Object::null()),
&is_not_instance);
}
// Generate inline instanceof test.
SubtypeTestCache& test_cache = SubtypeTestCache::ZoneHandle();
test_cache = GenerateInlineInstanceof(token_pos, type,
&is_instance, &is_not_instance);
// test_cache is null if there is no fall-through.
Label done;
if (!test_cache.IsNull()) {
// Generate runtime call.
// Load instantiator (A2) and its type arguments (A1).
__ lw(A1, Address(SP, 0 * kWordSize));
__ lw(A2, Address(SP, 1 * kWordSize));
__ addiu(SP, SP, Immediate(-6 * kWordSize));
__ LoadObject(TMP, Object::ZoneHandle());
__ sw(TMP, Address(SP, 5 * kWordSize)); // Make room for the result.
__ sw(A0, Address(SP, 4 * kWordSize)); // Push the instance.
__ LoadObject(TMP, type);
__ sw(TMP, Address(SP, 3 * kWordSize)); // Push the type.
__ sw(A2, Address(SP, 2 * kWordSize)); // Push instantiator.
__ sw(A1, Address(SP, 1 * kWordSize)); // Push type arguments.
__ LoadObject(A0, test_cache);
__ sw(A0, Address(SP, 0 * kWordSize));
GenerateCallRuntime(token_pos, deopt_id, kInstanceofRuntimeEntry, 5, locs);
// Pop the parameters supplied to the runtime entry. The result of the
// instanceof runtime call will be left as the result of the operation.
__ lw(T0, Address(SP, 5 * kWordSize));
__ addiu(SP, SP, Immediate(6 * kWordSize));
if (negate_result) {
__ LoadObject(V0, Bool::True());
__ bne(T0, V0, &done);
__ LoadObject(V0, Bool::False());
} else {
__ mov(V0, T0);
}
__ b(&done);
}
__ Bind(&is_not_instance);
__ LoadObject(V0, Bool::Get(negate_result));
__ b(&done);
__ Bind(&is_instance);
__ LoadObject(V0, Bool::Get(!negate_result));
__ Bind(&done);
// Remove instantiator (A2) and its type arguments (A1).
__ Drop(2);
}
// Optimize assignable type check by adding inlined tests for:
// - NULL -> return NULL.
// - Smi -> compile time subtype check (only if dst class is not parameterized).
// - Class equality (only if class is not parameterized).
// Inputs:
// - A0: instance being type checked.
// - A1: instantiator type arguments or raw_null.
// - A2: instantiator or raw_null.
// Returns:
// - object in A0 for successful assignable check (or throws TypeError).
// Clobbers: T0, T1, T2
// Performance notes: positive checks must be quick, negative checks can be slow
// as they throw an exception.
void FlowGraphCompiler::GenerateAssertAssignable(intptr_t token_pos,
intptr_t deopt_id,
const AbstractType& dst_type,
const String& dst_name,
LocationSummary* locs) {
__ TraceSimMsg("AssertAssignable");
ASSERT(token_pos >= 0);
ASSERT(!dst_type.IsNull());
ASSERT(dst_type.IsFinalized());
// Assignable check is skipped in FlowGraphBuilder, not here.
ASSERT(dst_type.IsMalformed() || dst_type.IsMalbounded() ||
(!dst_type.IsDynamicType() && !dst_type.IsObjectType()));
// Preserve instantiator and its type arguments.
__ addiu(SP, SP, Immediate(-2 * kWordSize));
__ sw(A2, Address(SP, 1 * kWordSize));
// A null object is always assignable and is returned as result.
Label is_assignable, runtime_call;
__ BranchEqual(A0, reinterpret_cast<int32_t>(Object::null()), &is_assignable);
__ delay_slot()->sw(A1, Address(SP, 0 * kWordSize));
if (!FLAG_eliminate_type_checks || dst_type.IsMalformed()) {
// If type checks are not eliminated during the graph building then
// a transition sentinel can be seen here.
__ BranchEqual(A0, Object::transition_sentinel(), &is_assignable);
}
// Generate throw new TypeError() if the type is malformed or malbounded.
if (dst_type.IsMalformed() || dst_type.IsMalbounded()) {
Error& error = Error::Handle();
if (dst_type.IsMalformed()) {
error = dst_type.malformed_error();
} else {
const bool is_malbounded = dst_type.IsMalboundedWithError(&error);
ASSERT(is_malbounded);
}
const String& error_message = String::ZoneHandle(
Symbols::New(error.ToErrorCString()));
__ addiu(SP, SP, Immediate(-4 * kWordSize));
__ LoadObject(TMP1, Object::ZoneHandle());
__ sw(TMP1, Address(SP, 3 * kWordSize)); // Make room for the result.
__ sw(A0, Address(SP, 2 * kWordSize)); // Push the source object.
__ LoadObject(TMP1, dst_name);
__ sw(TMP1, Address(SP, 1 * kWordSize)); // Push the destination name.
__ LoadObject(TMP1, error_message);
__ sw(TMP1, Address(SP, 0 * kWordSize));
GenerateCallRuntime(token_pos,
deopt_id,
kMalformedTypeErrorRuntimeEntry,
3,
locs);
// We should never return here.
__ break_(0);
__ Bind(&is_assignable); // For a null object.
// Restore instantiator and its type arguments.
__ lw(A1, Address(SP, 0 * kWordSize));
__ lw(A2, Address(SP, 1 * kWordSize));
__ addiu(SP, SP, Immediate(2 * kWordSize));
return;
}
// Generate inline type check, linking to runtime call if not assignable.
SubtypeTestCache& test_cache = SubtypeTestCache::ZoneHandle();
test_cache = GenerateInlineInstanceof(token_pos, dst_type,
&is_assignable, &runtime_call);
__ Bind(&runtime_call);
// Load instantiator (A2) and its type arguments (A1).
__ lw(A1, Address(SP, 0 * kWordSize));
__ lw(A2, Address(SP, 1 * kWordSize));
__ addiu(SP, SP, Immediate(-7 * kWordSize));
__ LoadObject(TMP1, Object::ZoneHandle());
__ sw(TMP1, Address(SP, 6 * kWordSize)); // Make room for the result.
__ sw(A0, Address(SP, 5 * kWordSize)); // Push the source object.
__ LoadObject(TMP1, dst_type);
__ sw(TMP1, Address(SP, 4 * kWordSize)); // Push the type of the destination.
__ sw(A2, Address(SP, 3 * kWordSize)); // Push instantiator.
__ sw(A1, Address(SP, 2 * kWordSize)); // Push type arguments.
__ LoadObject(TMP1, dst_name);
__ sw(TMP1, Address(SP, 1 * kWordSize)); // Push the name of the destination.
__ LoadObject(T0, test_cache);
__ sw(T0, Address(SP, 0 * kWordSize));
GenerateCallRuntime(token_pos, deopt_id, kTypeCheckRuntimeEntry, 6, locs);
// Pop the parameters supplied to the runtime entry. The result of the
// type check runtime call is the checked value.
__ lw(A0, Address(SP, 6 * kWordSize));
__ addiu(SP, SP, Immediate(7 * kWordSize));
__ Bind(&is_assignable);
// Restore instantiator and its type arguments.
__ lw(A1, Address(SP, 0 * kWordSize));
__ lw(A2, Address(SP, 1 * kWordSize));
__ addiu(SP, SP, Immediate(2 * kWordSize));
}
void FlowGraphCompiler::EmitInstructionPrologue(Instruction* instr) {
if (!is_optimizing()) {
if (FLAG_enable_type_checks && instr->IsAssertAssignable()) {
AssertAssignableInstr* assert = instr->AsAssertAssignable();
AddCurrentDescriptor(PcDescriptors::kDeopt,
assert->deopt_id(),
assert->token_pos());
} else if (instr->IsGuardField() ||
instr->CanBecomeDeoptimizationTarget()) {
AddCurrentDescriptor(PcDescriptors::kDeopt,
instr->deopt_id(),
Scanner::kDummyTokenIndex);
}
AllocateRegistersLocally(instr);
} else if (instr->MayThrow() &&
(CurrentTryIndex() != CatchClauseNode::kInvalidTryIndex)) {
// Optimized try-block: Sync locals to fixed stack locations.
EmitTrySync(instr, CurrentTryIndex());
}
}
void FlowGraphCompiler::EmitTrySyncMove(intptr_t dest_offset,
Location loc,
bool* push_emitted) {
if (loc.IsConstant()) {
if (!*push_emitted) {
__ Push(T0);
*push_emitted = true;
}
__ LoadObject(T0, loc.constant());
__ StoreToOffset(T0, FP, dest_offset);
} else if (loc.IsRegister()) {
if (*push_emitted && loc.reg() == T0) {
__ lw(T0, Address(SP, 0));
__ StoreToOffset(T0, FP, dest_offset);
} else {
__ StoreToOffset(loc.reg(), FP, dest_offset);
}
} else {
const intptr_t src_offset = loc.ToStackSlotOffset();
if (src_offset != dest_offset) {
if (!*push_emitted) {
__ Push(T0);
*push_emitted = true;
}
__ LoadFromOffset(T0, FP, src_offset);
__ StoreToOffset(T0, FP, dest_offset);
}
}
}
void FlowGraphCompiler::EmitTrySync(Instruction* instr, intptr_t try_index) {
ASSERT(is_optimizing());
Environment* env = instr->env();
CatchBlockEntryInstr* catch_block =
flow_graph().graph_entry()->GetCatchEntry(try_index);
const GrowableArray<Definition*>* idefs = catch_block->initial_definitions();
// Parameters.
intptr_t i = 0;
bool push_emitted = false;
const intptr_t num_non_copied_params = flow_graph().num_non_copied_params();
const intptr_t param_base =
kParamEndSlotFromFp + num_non_copied_params;
for (; i < num_non_copied_params; ++i) {
if ((*idefs)[i]->IsConstant()) continue; // Common constants
Location loc = env->LocationAt(i);
EmitTrySyncMove((param_base - i) * kWordSize, loc, &push_emitted);
}
// Process locals. Skip exception_var and stacktrace_var.
intptr_t local_base = kFirstLocalSlotFromFp + num_non_copied_params;
intptr_t ex_idx = local_base - catch_block->exception_var().index();
intptr_t st_idx = local_base - catch_block->stacktrace_var().index();
for (; i < flow_graph().variable_count(); ++i) {
if (i == ex_idx || i == st_idx) continue;
if ((*idefs)[i]->IsConstant()) continue;
Location loc = env->LocationAt(i);
EmitTrySyncMove((local_base - i) * kWordSize, loc, &push_emitted);
// Update safepoint bitmap to indicate that the target location
// now contains a pointer.
instr->locs()->stack_bitmap()->Set(i - num_non_copied_params, true);
}
if (push_emitted) {
__ Pop(T0);
}
}
void FlowGraphCompiler::EmitInstructionEpilogue(Instruction* instr) {
if (is_optimizing()) return;
Definition* defn = instr->AsDefinition();
if ((defn != NULL) && defn->is_used()) {
__ Push(defn->locs()->out().reg());
}
}
// Input parameters:
// S4: arguments descriptor array.
void FlowGraphCompiler::CopyParameters() {
__ TraceSimMsg("CopyParameters");
__ Comment("Copy parameters");
const Function& function = parsed_function().function();
LocalScope* scope = parsed_function().node_sequence()->scope();
const int num_fixed_params = function.num_fixed_parameters();
const int num_opt_pos_params = function.NumOptionalPositionalParameters();
const int num_opt_named_params = function.NumOptionalNamedParameters();
const int num_params =
num_fixed_params + num_opt_pos_params + num_opt_named_params;
ASSERT(function.NumParameters() == num_params);
ASSERT(parsed_function().first_parameter_index() == kFirstLocalSlotFromFp);
// Check that min_num_pos_args <= num_pos_args <= max_num_pos_args,
// where num_pos_args is the number of positional arguments passed in.
const int min_num_pos_args = num_fixed_params;
const int max_num_pos_args = num_fixed_params + num_opt_pos_params;
__ lw(T2, FieldAddress(S4, ArgumentsDescriptor::positional_count_offset()));
// Check that min_num_pos_args <= num_pos_args.
Label wrong_num_arguments;
__ BranchSignedLess(T2, Smi::RawValue(min_num_pos_args),
&wrong_num_arguments);
// Check that num_pos_args <= max_num_pos_args.
__ BranchSignedGreater(T2, Smi::RawValue(max_num_pos_args),
&wrong_num_arguments);
// Copy positional arguments.
// Argument i passed at fp[kParamEndSlotFromFp + num_args - i] is copied
// to fp[kFirstLocalSlotFromFp - i].
__ lw(T1, FieldAddress(S4, ArgumentsDescriptor::count_offset()));
// Since T1 and T2 are Smi, use sll 1 instead of sll 2.
// Let T1 point to the last passed positional argument, i.e. to
// fp[kParamEndSlotFromFp + num_args - (num_pos_args - 1)].
__ subu(T1, T1, T2);
__ sll(T1, T1, 1);
__ addu(T1, FP, T1);
__ AddImmediate(T1, (kParamEndSlotFromFp + 1) * kWordSize);
// Let T0 point to the last copied positional argument, i.e. to
// fp[kFirstLocalSlotFromFp - (num_pos_args - 1)].
__ AddImmediate(T0, FP, (kFirstLocalSlotFromFp + 1) * kWordSize);
__ sll(T2, T2, 1); // T2 is a Smi.
__ Comment("Argument Copy Loop");
Label loop, loop_exit;
__ blez(T2, &loop_exit);
__ delay_slot()->subu(T0, T0, T2);
__ Bind(&loop);
__ addu(T4, T1, T2);
__ lw(T3, Address(T4, -kWordSize));
__ addiu(T2, T2, Immediate(-kWordSize));
__ addu(T5, T0, T2);
__ bgtz(T2, &loop);
__ delay_slot()->sw(T3, Address(T5));
__ Bind(&loop_exit);
// Copy or initialize optional named arguments.
Label all_arguments_processed;
#ifdef DEBUG
const bool check_correct_named_args = true;
#else
const bool check_correct_named_args = function.IsClosureFunction();
#endif
if (num_opt_named_params > 0) {
__ Comment("There are named parameters");
// Start by alphabetically sorting the names of the optional parameters.
LocalVariable** opt_param = new LocalVariable*[num_opt_named_params];
int* opt_param_position = new int[num_opt_named_params];
for (int pos = num_fixed_params; pos < num_params; pos++) {
LocalVariable* parameter = scope->VariableAt(pos);
const String& opt_param_name = parameter->name();
int i = pos - num_fixed_params;
while (--i >= 0) {
LocalVariable* param_i = opt_param[i];
const intptr_t result = opt_param_name.CompareTo(param_i->name());
ASSERT(result != 0);
if (result > 0) break;
opt_param[i + 1] = opt_param[i];
opt_param_position[i + 1] = opt_param_position[i];
}
opt_param[i + 1] = parameter;
opt_param_position[i + 1] = pos;
}
// Generate code handling each optional parameter in alphabetical order.
__ lw(T1, FieldAddress(S4, ArgumentsDescriptor::count_offset()));
__ lw(T2, FieldAddress(S4, ArgumentsDescriptor::positional_count_offset()));
__ SmiUntag(T2);
// Let T1 point to the first passed argument, i.e. to
// fp[kParamEndSlotFromFp + num_args - 0]; num_args (T1) is Smi.
__ sll(T3, T1, 1);
__ addu(T1, FP, T3);
__ AddImmediate(T1, kParamEndSlotFromFp * kWordSize);
// Let T0 point to the entry of the first named argument.
__ AddImmediate(T0, S4,
ArgumentsDescriptor::first_named_entry_offset() - kHeapObjectTag);
for (int i = 0; i < num_opt_named_params; i++) {
Label load_default_value, assign_optional_parameter;
const int param_pos = opt_param_position[i];
// Check if this named parameter was passed in.
// Load T3 with the name of the argument.
__ lw(T3, Address(T0, ArgumentsDescriptor::name_offset()));
ASSERT(opt_param[i]->name().IsSymbol());
__ BranchNotEqual(T3, opt_param[i]->name(), &load_default_value);
// Load T3 with passed-in argument at provided arg_pos, i.e. at
// fp[kParamEndSlotFromFp + num_args - arg_pos].
__ lw(T3, Address(T0, ArgumentsDescriptor::position_offset()));
// T3 is arg_pos as Smi.
// Point to next named entry.
__ AddImmediate(T0, ArgumentsDescriptor::named_entry_size());
__ subu(T3, ZR, T3);
__ sll(T3, T3, 1);
__ addu(T3, T1, T3);
__ b(&assign_optional_parameter);
__ delay_slot()->lw(T3, Address(T3));
__ Bind(&load_default_value);
// Load T3 with default argument.
const Object& value = Object::ZoneHandle(
parsed_function().default_parameter_values().At(
param_pos - num_fixed_params));
__ LoadObject(T3, value);
__ Bind(&assign_optional_parameter);
// Assign T3 to fp[kFirstLocalSlotFromFp - param_pos].
// We do not use the final allocation index of the variable here, i.e.
// scope->VariableAt(i)->index(), because captured variables still need
// to be copied to the context that is not yet allocated.
const intptr_t computed_param_pos = kFirstLocalSlotFromFp - param_pos;
__ sw(T3, Address(FP, computed_param_pos * kWordSize));
}
delete[] opt_param;
delete[] opt_param_position;
if (check_correct_named_args) {
// Check that T0 now points to the null terminator in the arguments
// descriptor.
__ lw(T3, Address(T0));
__ BranchEqual(T3, reinterpret_cast<int32_t>(Object::null()),
&all_arguments_processed);
}
} else {
ASSERT(num_opt_pos_params > 0);
__ Comment("There are optional positional parameters");
__ lw(T2,
FieldAddress(S4, ArgumentsDescriptor::positional_count_offset()));
__ SmiUntag(T2);
for (int i = 0; i < num_opt_pos_params; i++) {
Label next_parameter;
// Handle this optional positional parameter only if k or fewer positional
// arguments have been passed, where k is param_pos, the position of this
// optional parameter in the formal parameter list.
const int param_pos = num_fixed_params + i;
__ BranchSignedGreater(T2, param_pos, &next_parameter);
// Load T3 with default argument.
const Object& value = Object::ZoneHandle(
parsed_function().default_parameter_values().At(i));
__ LoadObject(T3, value);
// Assign T3 to fp[kFirstLocalSlotFromFp - param_pos].
// We do not use the final allocation index of the variable here, i.e.
// scope->VariableAt(i)->index(), because captured variables still need
// to be copied to the context that is not yet allocated.
const intptr_t computed_param_pos = kFirstLocalSlotFromFp - param_pos;
__ sw(T3, Address(FP, computed_param_pos * kWordSize));
__ Bind(&next_parameter);
}
if (check_correct_named_args) {
__ lw(T1, FieldAddress(S4, ArgumentsDescriptor::count_offset()));
__ SmiUntag(T1);
// Check that T2 equals T1, i.e. no named arguments passed.
__ beq(T2, T1, &all_arguments_processed);
}
}
__ Bind(&wrong_num_arguments);
if (function.IsClosureFunction()) {
// Invoke noSuchMethod function passing "call" as the original name.
const int kNumArgsChecked = 1;
const ICData& ic_data = ICData::ZoneHandle(
ICData::New(function, Symbols::Call(), Object::empty_array(),
Isolate::kNoDeoptId, kNumArgsChecked));
__ LoadObject(S5, ic_data);
__ LeaveDartFrame(); // The arguments are still on the stack.
__ Branch(&StubCode::CallNoSuchMethodFunctionLabel());
// The noSuchMethod call may return to the caller, but not here.
__ break_(0);
} else if (check_correct_named_args) {
__ Stop("Wrong arguments");
}
__ Bind(&all_arguments_processed);
// Nullify originally passed arguments only after they have been copied and
// checked, otherwise noSuchMethod would not see their original values.
// This step can be skipped in case we decide that formal parameters are
// implicitly final, since garbage collecting the unmodified value is not
// an issue anymore.
// S4 : arguments descriptor array.
__ lw(T2, FieldAddress(S4, ArgumentsDescriptor::count_offset()));
__ sll(T2, T2, 1); // T2 is a Smi.
__ Comment("Null arguments loop");
Label null_args_loop, null_args_loop_exit;
__ blez(T2, &null_args_loop_exit);
__ delay_slot()->addiu(T1, FP,
Immediate((kParamEndSlotFromFp + 1) * kWordSize));
__ Bind(&null_args_loop);
__ addiu(T2, T2, Immediate(-kWordSize));
__ addu(T3, T1, T2);
__ LoadImmediate(T5, reinterpret_cast<int32_t>(Object::null()));
__ bgtz(T2, &null_args_loop);
__ delay_slot()->sw(T5, Address(T3));
__ Bind(&null_args_loop_exit);
}
void FlowGraphCompiler::GenerateInlinedGetter(intptr_t offset) {
// RA: return address.
// SP: receiver.
// Sequence node has one return node, its input is load field node.
__ lw(V0, Address(SP, 0 * kWordSize));
__ lw(V0, Address(V0, offset - kHeapObjectTag));
__ Ret();
}
void FlowGraphCompiler::GenerateInlinedSetter(intptr_t offset) {
// RA: return address.
// SP+1: receiver.
// SP+0: value.
// Sequence node has one store node and one return NULL node.
__ lw(T0, Address(SP, 1 * kWordSize)); // Receiver.
__ lw(T1, Address(SP, 0 * kWordSize)); // Value.
__ StoreIntoObject(T0, FieldAddress(T0, offset), T1);
__ LoadImmediate(V0, reinterpret_cast<int32_t>(Object::null()));
__ Ret();
}
void FlowGraphCompiler::EmitFrameEntry() {
const Function& function = parsed_function().function();
if (CanOptimizeFunction() &&
function.is_optimizable() &&
(!is_optimizing() || may_reoptimize())) {
const Register function_reg = T0;
__ GetNextPC(T2, TMP);
// Calculate offset of pool pointer from the PC.
const intptr_t object_pool_pc_dist =
Instructions::HeaderSize() - Instructions::object_pool_offset() +
assembler()->CodeSize() - 1 * Instr::kInstrSize;
// Preserve PP of caller.
__ mov(T1, PP);
// Temporarily setup pool pointer for this dart function.
__ lw(PP, Address(T2, -object_pool_pc_dist));
// Load function object from object pool.
__ LoadObject(function_reg, function); // Uses PP.
// Restore PP of caller.
__ mov(PP, T1);
// Patch point is after the eventually inlined function object.
AddCurrentDescriptor(PcDescriptors::kEntryPatch,
Isolate::kNoDeoptId,
0); // No token position.
intptr_t threshold = FLAG_optimization_counter_threshold;
__ lw(T1, FieldAddress(function_reg, Function::usage_counter_offset()));
if (is_optimizing()) {
// Reoptimization of an optimized function is triggered by counting in
// IC stubs, but not at the entry of the function.
threshold = FLAG_reoptimization_counter_threshold;
} else {
__ addiu(T1, T1, Immediate(1));
__ sw(T1, FieldAddress(function_reg, Function::usage_counter_offset()));
}
// Skip Branch if T1 is less than the threshold.
Label dont_branch;
__ BranchSignedLess(T1, threshold, &dont_branch);
ASSERT(function_reg == T0);
__ Branch(&StubCode::OptimizeFunctionLabel());
__ Bind(&dont_branch);
} else if (!flow_graph().IsCompiledForOsr()) {
AddCurrentDescriptor(PcDescriptors::kEntryPatch,
Isolate::kNoDeoptId,
0); // No token position.
}
__ Comment("Enter frame");
if (flow_graph().IsCompiledForOsr()) {
intptr_t extra_slots = StackSize()
- flow_graph().num_stack_locals()
- flow_graph().num_copied_params();
ASSERT(extra_slots >= 0);
__ EnterOsrFrame(extra_slots * kWordSize);
} else {
ASSERT(StackSize() >= 0);
__ EnterDartFrame(StackSize() * kWordSize);
}
}
// Input parameters:
// RA: return address.
// SP: address of last argument.
// FP: caller's frame pointer.
// PP: caller's pool pointer.
// S5: ic-data.
// S4: arguments descriptor array.
void FlowGraphCompiler::CompileGraph() {
InitCompiler();
TryIntrinsify();
EmitFrameEntry();
const Function& function = parsed_function().function();
const int num_fixed_params = function.num_fixed_parameters();
const int num_copied_params = parsed_function().num_copied_params();
const int num_locals = parsed_function().num_stack_locals();
// We check the number of passed arguments when we have to copy them due to
// the presence of optional parameters.
// No such checking code is generated if only fixed parameters are declared,
// unless we are in debug mode or unless we are compiling a closure.
if (num_copied_params == 0) {
#ifdef DEBUG
ASSERT(!parsed_function().function().HasOptionalParameters());
const bool check_arguments = !flow_graph().IsCompiledForOsr();
#else
const bool check_arguments =
function.IsClosureFunction() && !flow_graph().IsCompiledForOsr();
#endif
if (check_arguments) {
__ TraceSimMsg("Check argument count");
__ Comment("Check argument count");
// Check that exactly num_fixed arguments are passed in.
Label correct_num_arguments, wrong_num_arguments;
__ lw(T0, FieldAddress(S4, ArgumentsDescriptor::count_offset()));
__ BranchNotEqual(T0, Smi::RawValue(num_fixed_params),
&wrong_num_arguments);
__ lw(T1, FieldAddress(S4,
ArgumentsDescriptor::positional_count_offset()));
__ beq(T0, T1, &correct_num_arguments);
__ Bind(&wrong_num_arguments);
if (function.IsClosureFunction()) {
// Invoke noSuchMethod function passing the original function name.
// For closure functions, use "call" as the original name.
const String& name =
String::Handle(function.IsClosureFunction()
? Symbols::Call().raw()
: function.name());
const int kNumArgsChecked = 1;
const ICData& ic_data = ICData::ZoneHandle(
ICData::New(function, name, Object::empty_array(),
Isolate::kNoDeoptId, kNumArgsChecked));
__ LoadObject(S5, ic_data);
__ LeaveDartFrame(); // The arguments are still on the stack.
__ Branch(&StubCode::CallNoSuchMethodFunctionLabel());
// The noSuchMethod call may return to the caller, but not here.
__ break_(0);
} else {
__ Stop("Wrong number of arguments");
}
__ Bind(&correct_num_arguments);
}
} else if (!flow_graph().IsCompiledForOsr()) {
CopyParameters();
}
// In unoptimized code, initialize (non-argument) stack allocated slots to
// null.
if (!is_optimizing() && (num_locals > 0)) {
__ TraceSimMsg("Initialize spill slots");
__ Comment("Initialize spill slots");
const intptr_t slot_base = parsed_function().first_stack_local_index();
for (intptr_t i = 0; i < num_locals; ++i) {
// Subtract index i (locals lie at lower addresses than FP).
__ LoadImmediate(TMP, reinterpret_cast<int32_t>(Object::null()));
__ sw(TMP, Address(FP, (slot_base - i) * kWordSize));
}
}
if (FLAG_print_scopes) {
// Print the function scope (again) after generating the prologue in order
// to see annotations such as allocation indices of locals.
if (FLAG_print_ast) {
// Second printing.
OS::Print("Annotated ");
}
AstPrinter::PrintFunctionScope(parsed_function());
}
VisitBlocks();
__ break_(0);
GenerateDeferredCode();
// Emit function patching code. This will be swapped with the first 5 bytes
// at entry point.
AddCurrentDescriptor(PcDescriptors::kPatchCode,
Isolate::kNoDeoptId,
0); // No token position.
__ BranchPatchable(&StubCode::FixCallersTargetLabel());
AddCurrentDescriptor(PcDescriptors::kLazyDeoptJump,
Isolate::kNoDeoptId,
0); // No token position.
__ Branch(&StubCode::DeoptimizeLazyLabel());
}
void FlowGraphCompiler::GenerateCall(intptr_t token_pos,
const ExternalLabel* label,
PcDescriptors::Kind kind,
LocationSummary* locs) {
__ BranchLinkPatchable(label);
AddCurrentDescriptor(kind, Isolate::kNoDeoptId, token_pos);
RecordSafepoint(locs);
}
void FlowGraphCompiler::GenerateDartCall(intptr_t deopt_id,
intptr_t token_pos,
const ExternalLabel* label,
PcDescriptors::Kind kind,
LocationSummary* locs) {
__ BranchLinkPatchable(label);
AddCurrentDescriptor(kind, deopt_id, token_pos);
RecordSafepoint(locs);
// Marks either the continuation point in unoptimized code or the
// deoptimization point in optimized code, after call.
const intptr_t deopt_id_after = Isolate::ToDeoptAfter(deopt_id);
if (is_optimizing()) {
AddDeoptIndexAtCall(deopt_id_after, token_pos);
} else {
// Add deoptimization continuation point after the call and before the
// arguments are removed.
AddCurrentDescriptor(PcDescriptors::kDeopt,
deopt_id_after,
token_pos);
}
}
void FlowGraphCompiler::GenerateCallRuntime(intptr_t token_pos,
intptr_t deopt_id,
const RuntimeEntry& entry,
intptr_t argument_count,
LocationSummary* locs) {
__ CallRuntime(entry, argument_count);
AddCurrentDescriptor(PcDescriptors::kOther, deopt_id, token_pos);
RecordSafepoint(locs);
if (deopt_id != Isolate::kNoDeoptId) {
// Marks either the continuation point in unoptimized code or the
// deoptimization point in optimized code, after call.
const intptr_t deopt_id_after = Isolate::ToDeoptAfter(deopt_id);
if (is_optimizing()) {
AddDeoptIndexAtCall(deopt_id_after, token_pos);
} else {
// Add deoptimization continuation point after the call and before the
// arguments are removed.
AddCurrentDescriptor(PcDescriptors::kDeopt,
deopt_id_after,
token_pos);
}
}
}
void FlowGraphCompiler::EmitOptimizedInstanceCall(
ExternalLabel* target_label,
const ICData& ic_data,
intptr_t argument_count,
intptr_t deopt_id,
intptr_t token_pos,
LocationSummary* locs) {
// Each ICData propagated from unoptimized to optimized code contains the
// function that corresponds to the Dart function of that IC call. Due
// to inlining in optimized code, that function may not correspond to the
// top-level function (parsed_function().function()) which could be
// reoptimized and which counter needs to be incremented.
// Pass the function explicitly, it is used in IC stub.
__ TraceSimMsg("OptimizedInstanceCall");
__ LoadObject(T0, parsed_function().function());
__ LoadObject(S5, ic_data);
GenerateDartCall(deopt_id,
token_pos,
target_label,
PcDescriptors::kIcCall,
locs);
__ Drop(argument_count);
}
void FlowGraphCompiler::EmitInstanceCall(ExternalLabel* target_label,
const ICData& ic_data,
intptr_t argument_count,
intptr_t deopt_id,
intptr_t token_pos,
LocationSummary* locs) {
__ TraceSimMsg("InstanceCall");
__ LoadObject(S5, ic_data);
GenerateDartCall(deopt_id,
token_pos,
target_label,
PcDescriptors::kIcCall,
locs);
__ TraceSimMsg("InstanceCall return");
__ Drop(argument_count);
}
void FlowGraphCompiler::EmitMegamorphicInstanceCall(
const ICData& ic_data,
intptr_t argument_count,
intptr_t deopt_id,
intptr_t token_pos,
LocationSummary* locs) {
MegamorphicCacheTable* table = Isolate::Current()->megamorphic_cache_table();
const String& name = String::Handle(ic_data.target_name());
const Array& arguments_descriptor =
Array::ZoneHandle(ic_data.arguments_descriptor());
ASSERT(!arguments_descriptor.IsNull());
const MegamorphicCache& cache =
MegamorphicCache::ZoneHandle(table->Lookup(name, arguments_descriptor));
Label not_smi, load_cache;
__ TraceSimMsg("MegamorphicInstanceCall");
__ lw(T0, Address(SP, (argument_count - 1) * kWordSize));
__ andi(CMPRES, T0, Immediate(kSmiTagMask));
__ bne(CMPRES, ZR, &not_smi);
__ LoadImmediate(T0, Smi::RawValue(kSmiCid));
__ b(&load_cache);
__ Bind(&not_smi);
__ LoadClassId(T0, T0);
__ SmiTag(T0);
// T0: class ID of the receiver (smi).
__ Bind(&load_cache);
__ LoadObject(T1, cache);
__ lw(T2, FieldAddress(T1, MegamorphicCache::buckets_offset()));
__ lw(T1, FieldAddress(T1, MegamorphicCache::mask_offset()));
// T2: cache buckets array.
// T1: mask.
__ mov(T3, T0);
Label loop, update, call_target_function;
__ b(&loop);
__ Bind(&update);
__ addiu(T3, T3, Immediate(Smi::RawValue(1)));
__ Bind(&loop);
__ and_(T3, T3, T1);
const intptr_t base = Array::data_offset();
// T3 is smi tagged, but table entries are two words, so LSL 2.
__ sll(TMP1, T3, 2);
__ addu(TMP1, T2, TMP1);
__ lw(T4, FieldAddress(TMP, base));
ASSERT(kIllegalCid == 0);
__ beq(T4, ZR, &call_target_function);
__ bne(T4, T0, &update);
__ Bind(&call_target_function);
// Call the target found in the cache. For a class id match, this is a
// proper target for the given name and arguments descriptor. If the
// illegal class id was found, the target is a cache miss handler that can
// be invoked as a normal Dart function.
__ sll(TMP1, T3, 2);
__ addu(TMP1, T2, TMP1);
__ lw(T0, FieldAddress(TMP, base + kWordSize));
__ lw(T0, FieldAddress(T0, Function::code_offset()));
__ lw(T0, FieldAddress(T0, Code::instructions_offset()));
__ LoadObject(S5, ic_data);
__ LoadObject(S4, arguments_descriptor);
__ AddImmediate(T0, Instructions::HeaderSize() - kHeapObjectTag);
__ jalr(T0);
AddCurrentDescriptor(PcDescriptors::kOther, Isolate::kNoDeoptId, token_pos);
RecordSafepoint(locs);
AddDeoptIndexAtCall(Isolate::ToDeoptAfter(deopt_id), token_pos);
__ Drop(argument_count);
}
void FlowGraphCompiler::EmitUnoptimizedStaticCall(
const Function& target_function,
const Array& arguments_descriptor,
intptr_t argument_count,
intptr_t deopt_id,
intptr_t token_pos,
LocationSummary* locs) {
// TODO(srdjan): Improve performance of function recognition.
MethodRecognizer::Kind recognized_kind =
MethodRecognizer::RecognizeKind(target_function);
int num_args_checked = 0;
if ((recognized_kind == MethodRecognizer::kMathMin) ||
(recognized_kind == MethodRecognizer::kMathMax)) {
num_args_checked = 2;
}
const ICData& ic_data = ICData::ZoneHandle(
ICData::New(parsed_function().function(), // Caller function.
String::Handle(target_function.name()),
arguments_descriptor,
deopt_id,
num_args_checked)); // No arguments checked.
ic_data.AddTarget(target_function);
uword label_address = 0;
if (ic_data.num_args_tested() == 0) {
label_address = StubCode::ZeroArgsUnoptimizedStaticCallEntryPoint();
} else if (ic_data.num_args_tested() == 2) {
label_address = StubCode::TwoArgsUnoptimizedStaticCallEntryPoint();
} else {
UNIMPLEMENTED();
}
ExternalLabel target_label("StaticCallICStub", label_address);
__ LoadObject(S5, ic_data);
GenerateDartCall(deopt_id,
token_pos,
&target_label,
PcDescriptors::kUnoptStaticCall,
locs);
__ Drop(argument_count);
}
void FlowGraphCompiler::EmitOptimizedStaticCall(
const Function& function,
const Array& arguments_descriptor,
intptr_t argument_count,
intptr_t deopt_id,
intptr_t token_pos,
LocationSummary* locs) {
__ TraceSimMsg("StaticCall");
__ LoadObject(S4, arguments_descriptor);
// Do not use the code from the function, but let the code be patched so that
// we can record the outgoing edges to other code.
GenerateDartCall(deopt_id,
token_pos,
&StubCode::CallStaticFunctionLabel(),
PcDescriptors::kOptStaticCall,
locs);
AddStaticCallTarget(function);
__ Drop(argument_count);
}
void FlowGraphCompiler::EmitEqualityRegConstCompare(Register reg,
const Object& obj,
bool needs_number_check,
intptr_t token_pos) {
__ TraceSimMsg("EqualityRegConstCompare");
if (needs_number_check &&
(obj.IsMint() || obj.IsDouble() || obj.IsBigint())) {
__ addiu(SP, SP, Immediate(-2 * kWordSize));
__ sw(reg, Address(SP, 1 * kWordSize));
__ LoadObject(TMP1, obj);
__ sw(TMP1, Address(SP, 0 * kWordSize));
if (is_optimizing()) {
__ BranchLink(&StubCode::OptimizedIdenticalWithNumberCheckLabel());
} else {
__ BranchLink(&StubCode::UnoptimizedIdenticalWithNumberCheckLabel());
}
AddCurrentDescriptor(PcDescriptors::kRuntimeCall,
Isolate::kNoDeoptId,
token_pos);
__ TraceSimMsg("EqualityRegConstCompare return");
__ lw(reg, Address(SP, 1 * kWordSize)); // Restore 'reg'.
__ addiu(SP, SP, Immediate(2 * kWordSize)); // Discard constant.
return;
}
__ CompareObject(CMPRES1, CMPRES2, reg, obj);
}
void FlowGraphCompiler::EmitEqualityRegRegCompare(Register left,
Register right,
bool needs_number_check,
intptr_t token_pos) {
__ TraceSimMsg("EqualityRegRegCompare");
__ Comment("EqualityRegRegCompare");
if (needs_number_check) {
__ addiu(SP, SP, Immediate(-2 * kWordSize));
__ sw(left, Address(SP, 1 * kWordSize));
__ sw(right, Address(SP, 0 * kWordSize));
if (is_optimizing()) {
__ BranchLink(&StubCode::OptimizedIdenticalWithNumberCheckLabel());
} else {
__ BranchLink(&StubCode::UnoptimizedIdenticalWithNumberCheckLabel());
}
AddCurrentDescriptor(PcDescriptors::kRuntimeCall,
Isolate::kNoDeoptId,
token_pos);
__ TraceSimMsg("EqualityRegRegCompare return");
// Stub returns result in CMPRES. If it is 0, then left and right are equal.
__ lw(right, Address(SP, 0 * kWordSize));
__ lw(left, Address(SP, 1 * kWordSize));
__ addiu(SP, SP, Immediate(2 * kWordSize));
} else {
__ slt(CMPRES1, left, right);
__ slt(CMPRES2, right, left);
}
}
void FlowGraphCompiler::SaveLiveRegisters(LocationSummary* locs) {
__ TraceSimMsg("SaveLiveRegisters");
// TODO(vegorov): consider saving only caller save (volatile) registers.
const intptr_t fpu_regs_count= locs->live_registers()->fpu_regs_count();
if (fpu_regs_count > 0) {
__ AddImmediate(SP, -(fpu_regs_count * kFpuRegisterSize));
// Store fpu registers with the lowest register number at the lowest
// address.
intptr_t offset = 0;
for (intptr_t reg_idx = 0; reg_idx < kNumberOfFpuRegisters; ++reg_idx) {
DRegister fpu_reg = static_cast<DRegister>(reg_idx);
if (locs->live_registers()->ContainsFpuRegister(fpu_reg)) {
__ StoreDToOffset(fpu_reg, SP, offset);
offset += kFpuRegisterSize;
}
}
ASSERT(offset == (fpu_regs_count * kFpuRegisterSize));
}
// Store general purpose registers with the lowest register number at the
// lowest address.
const intptr_t cpu_registers = locs->live_registers()->cpu_registers();
ASSERT((cpu_registers & ~kAllCpuRegistersList) == 0);
const int register_count = Utils::CountOneBits(cpu_registers);
int registers_pushed = 0;
__ addiu(SP, SP, Immediate(-register_count * kWordSize));
for (int i = 0; i < kNumberOfCpuRegisters; i++) {
Register r = static_cast<Register>(i);
if (locs->live_registers()->ContainsRegister(r)) {
__ sw(r, Address(SP, registers_pushed * kWordSize));
registers_pushed++;
}
}
}
void FlowGraphCompiler::RestoreLiveRegisters(LocationSummary* locs) {
// General purpose registers have the lowest register number at the
// lowest address.
__ TraceSimMsg("RestoreLiveRegisters");
const intptr_t cpu_registers = locs->live_registers()->cpu_registers();
ASSERT((cpu_registers & ~kAllCpuRegistersList) == 0);
const int register_count = Utils::CountOneBits(cpu_registers);
int registers_popped = 0;
for (int i = 0; i < kNumberOfCpuRegisters; i++) {
Register r = static_cast<Register>(i);
if (locs->live_registers()->ContainsRegister(r)) {
__ lw(r, Address(SP, registers_popped * kWordSize));
registers_popped++;
}
}
__ addiu(SP, SP, Immediate(register_count * kWordSize));
const intptr_t fpu_regs_count = locs->live_registers()->fpu_regs_count();
if (fpu_regs_count > 0) {
// Fpu registers have the lowest register number at the lowest address.
intptr_t offset = 0;
for (intptr_t reg_idx = 0; reg_idx < kNumberOfFpuRegisters; ++reg_idx) {
DRegister fpu_reg = static_cast<DRegister>(reg_idx);
if (locs->live_registers()->ContainsFpuRegister(fpu_reg)) {
__ LoadDFromOffset(fpu_reg, SP, offset);
offset += kFpuRegisterSize;
}
}
ASSERT(offset == (fpu_regs_count * kFpuRegisterSize));
__ AddImmediate(SP, offset);
}
}
void FlowGraphCompiler::EmitTestAndCall(const ICData& ic_data,
Register class_id_reg,
intptr_t argument_count,
const Array& argument_names,
Label* deopt,
intptr_t deopt_id,
intptr_t token_index,
LocationSummary* locs) {
ASSERT(is_optimizing());
ASSERT(!ic_data.IsNull() && (ic_data.NumberOfChecks() > 0));
Label match_found;
const intptr_t len = ic_data.NumberOfChecks();
GrowableArray<CidTarget> sorted(len);
SortICDataByCount(ic_data, &sorted);
ASSERT(class_id_reg != S4);
ASSERT(len > 0); // Why bother otherwise.
const Array& arguments_descriptor =
Array::ZoneHandle(ArgumentsDescriptor::New(argument_count,
argument_names));
__ TraceSimMsg("EmitTestAndCall");
__ Comment("EmitTestAndCall");
__ LoadObject(S4, arguments_descriptor);
for (intptr_t i = 0; i < len; i++) {
const bool is_last_check = (i == (len - 1));
Label next_test;
if (is_last_check) {
__ BranchNotEqual(class_id_reg, sorted[i].cid, deopt);
} else {
__ BranchNotEqual(class_id_reg, sorted[i].cid, &next_test);
}
// Do not use the code from the function, but let the code be patched so
// that we can record the outgoing edges to other code.
GenerateDartCall(deopt_id,
token_index,
&StubCode::CallStaticFunctionLabel(),
PcDescriptors::kOptStaticCall,
locs);
const Function& function = *sorted[i].target;
AddStaticCallTarget(function);
__ Drop(argument_count);
if (!is_last_check) {
__ b(&match_found);
}
__ Bind(&next_test);
}
__ Bind(&match_found);
}
void FlowGraphCompiler::EmitDoubleCompareBranch(Condition true_condition,
FpuRegister left,
FpuRegister right,
BranchInstr* branch) {
ASSERT(branch != NULL);
__ Comment("DoubleCompareBranch");
assembler()->cund(left, right);
BlockEntryInstr* nan_result = (true_condition == NE) ?
branch->true_successor() : branch->false_successor();
assembler()->bc1t(GetJumpLabel(nan_result));
switch (true_condition) {
case EQ: assembler()->ceqd(left, right); break;
case NE: assembler()->ceqd(left, right); break;
case LT: assembler()->coltd(left, right); break;
case LE: assembler()->coled(left, right); break;
case GT: assembler()->coltd(right, left); break;
case GE: assembler()->coled(right, left); break;
default: {
// Should only passing the above conditions to this function.
UNREACHABLE();
break;
}
}
assembler()->LoadImmediate(TMP, 1);
if (true_condition == NE) {
assembler()->movf(CMPRES1, ZR);
assembler()->movt(CMPRES1, TMP);
} else {
assembler()->movf(CMPRES1, TMP);
assembler()->movt(CMPRES1, ZR);
}
assembler()->mov(CMPRES2, ZR);
// EmitBranchOnCondition expects ordering to be described by CMPRES, CMPRES2.
branch->EmitBranchOnCondition(this, EQ);
}
void FlowGraphCompiler::EmitDoubleCompareBool(Condition true_condition,
FpuRegister left,
FpuRegister right,
Register result) {
Label done;
__ Comment("DoubleCompareBool");
assembler()->LoadObject(result, Bool::False());
assembler()->cund(left, right);
assembler()->bc1t(&done);
switch (true_condition) {
case EQ: assembler()->ceqd(left, right); break;
case NE: assembler()->ceqd(left, right); break;
case LT: assembler()->coltd(left, right); break;
case LE: assembler()->coled(left, right); break;
case GT: assembler()->coltd(right, left); break;
case GE: assembler()->coled(right, left); break;
default: {
// Should only passing the above conditions to this function.
UNREACHABLE();
break;
}
}
if (true_condition == NE) {
assembler()->bc1t(&done); // False is already in result.
} else {
assembler()->bc1f(&done);
}
assembler()->LoadObject(result, Bool::True());
assembler()->Bind(&done);
}
FieldAddress FlowGraphCompiler::ElementAddressForIntIndex(intptr_t cid,
intptr_t index_scale,
Register array,
intptr_t index) {
UNREACHABLE();
return FieldAddress(array, index);
}
FieldAddress FlowGraphCompiler::ElementAddressForRegIndex(intptr_t cid,
intptr_t index_scale,
Register array,
Register index) {
UNREACHABLE();
return FieldAddress(array, index);
}
Address FlowGraphCompiler::ExternalElementAddressForIntIndex(
intptr_t index_scale,
Register array,
intptr_t index) {
UNREACHABLE();
return FieldAddress(array, index);
}
Address FlowGraphCompiler::ExternalElementAddressForRegIndex(
intptr_t index_scale,
Register array,
Register index) {
UNREACHABLE();
return FieldAddress(array, index);
}
#undef __
#define __ compiler_->assembler()->
void ParallelMoveResolver::EmitMove(int index) {
MoveOperands* move = moves_[index];
const Location source = move->src();
const Location destination = move->dest();
__ TraceSimMsg("ParallelMoveResolver::EmitMove");
if (source.IsRegister()) {
if (destination.IsRegister()) {
__ mov(destination.reg(), source.reg());
} else {
ASSERT(destination.IsStackSlot());
const intptr_t dest_offset = destination.ToStackSlotOffset();
__ StoreToOffset(source.reg(), FP, dest_offset);
}
} else if (source.IsStackSlot()) {
if (destination.IsRegister()) {
const intptr_t source_offset = source.ToStackSlotOffset();
__ LoadFromOffset(destination.reg(), FP, source_offset);
} else {
ASSERT(destination.IsStackSlot());
const intptr_t source_offset = source.ToStackSlotOffset();
const intptr_t dest_offset = destination.ToStackSlotOffset();
__ LoadFromOffset(TMP, FP, source_offset);
__ StoreToOffset(TMP, FP, dest_offset);
}
} else if (source.IsFpuRegister()) {
if (destination.IsFpuRegister()) {
DRegister dst = destination.fpu_reg();
DRegister src = source.fpu_reg();
__ movd(dst, src);
} else {
if (destination.IsDoubleStackSlot()) {
const intptr_t dest_offset = destination.ToStackSlotOffset();
DRegister src = source.fpu_reg();
__ StoreDToOffset(src, FP, dest_offset);
} else {
ASSERT(destination.IsQuadStackSlot());
UNIMPLEMENTED();
}
}
} else if (source.IsDoubleStackSlot()) {
if (destination.IsFpuRegister()) {
const intptr_t dest_offset = source.ToStackSlotOffset();
DRegister dst = destination.fpu_reg();
__ LoadDFromOffset(dst, FP, dest_offset);
} else {
ASSERT(destination.IsDoubleStackSlot());
const intptr_t source_offset = source.ToStackSlotOffset();
const intptr_t dest_offset = destination.ToStackSlotOffset();
__ LoadDFromOffset(DTMP, FP, source_offset);
__ StoreDToOffset(DTMP, FP, dest_offset);
}
} else if (source.IsQuadStackSlot()) {
UNIMPLEMENTED();
} else {
ASSERT(source.IsConstant());
if (destination.IsRegister()) {
const Object& constant = source.constant();
__ LoadObject(destination.reg(), constant);
} else {
ASSERT(destination.IsStackSlot());
const intptr_t dest_offset = destination.ToStackSlotOffset();
__ LoadObject(TMP, source.constant());
__ StoreToOffset(TMP, FP, dest_offset);
}
}
move->Eliminate();
}
void ParallelMoveResolver::EmitSwap(int index) {
MoveOperands* move = moves_[index];
const Location source = move->src();
const Location destination = move->dest();
if (source.IsRegister() && destination.IsRegister()) {
ASSERT(source.reg() != TMP);
ASSERT(destination.reg() != TMP);
__ mov(TMP, source.reg());
__ mov(source.reg(), destination.reg());
__ mov(destination.reg(), TMP);
} else if (source.IsRegister() && destination.IsStackSlot()) {
Exchange(source.reg(), destination.ToStackSlotOffset());
} else if (source.IsStackSlot() && destination.IsRegister()) {
Exchange(destination.reg(), source.ToStackSlotOffset());
} else if (source.IsStackSlot() && destination.IsStackSlot()) {
Exchange(source.ToStackSlotOffset(), destination.ToStackSlotOffset());
} else if (source.IsFpuRegister() && destination.IsFpuRegister()) {
DRegister dst = destination.fpu_reg();
DRegister src = source.fpu_reg();
__ movd(DTMP, src);
__ movd(src, dst);
__ movd(dst, DTMP);
} else if (source.IsFpuRegister() || destination.IsFpuRegister()) {
ASSERT(destination.IsDoubleStackSlot() ||
destination.IsQuadStackSlot() ||
source.IsDoubleStackSlot() ||
source.IsQuadStackSlot());
bool double_width = destination.IsDoubleStackSlot() ||
source.IsDoubleStackSlot();
DRegister reg = source.IsFpuRegister() ? source.fpu_reg()
: destination.fpu_reg();
const intptr_t slot_offset = source.IsFpuRegister()
? destination.ToStackSlotOffset()
: source.ToStackSlotOffset();
if (double_width) {
__ LoadDFromOffset(DTMP, FP, slot_offset);
__ StoreDToOffset(reg, FP, slot_offset);
__ movd(reg, DTMP);
} else {
UNIMPLEMENTED();
}
} else if (source.IsDoubleStackSlot() && destination.IsDoubleStackSlot()) {
const intptr_t source_offset = source.ToStackSlotOffset();
const intptr_t dest_offset = destination.ToStackSlotOffset();
ScratchFpuRegisterScope ensure_scratch(this, DTMP);
DRegister scratch = ensure_scratch.reg();
__ LoadDFromOffset(DTMP, FP, source_offset);
__ LoadDFromOffset(scratch, FP, dest_offset);
__ StoreDToOffset(DTMP, FP, dest_offset);
__ StoreDToOffset(scratch, FP, source_offset);
} else if (source.IsQuadStackSlot() && destination.IsQuadStackSlot()) {
UNIMPLEMENTED();
} else {
UNREACHABLE();
}
// The swap of source and destination has executed a move from source to
// destination.
move->Eliminate();
// Any unperformed (including pending) move with a source of either
// this move's source or destination needs to have their source
// changed to reflect the state of affairs after the swap.
for (int i = 0; i < moves_.length(); ++i) {
const MoveOperands& other_move = *moves_[i];
if (other_move.Blocks(source)) {
moves_[i]->set_src(destination);
} else if (other_move.Blocks(destination)) {
moves_[i]->set_src(source);
}
}
}
void ParallelMoveResolver::MoveMemoryToMemory(const Address& dst,
const Address& src) {
__ TraceSimMsg("ParallelMoveResolver::MoveMemoryToMemory");
__ lw(TMP1, src);
__ sw(TMP1, dst);
}
void ParallelMoveResolver::StoreObject(const Address& dst, const Object& obj) {
__ TraceSimMsg("ParallelMoveResolver::StoreObject");
__ LoadObject(TMP1, obj);
__ sw(TMP1, dst);
}
// Do not call or implement this function. Instead, use the form below that
// uses an offset from the frame pointer instead of an Address.
void ParallelMoveResolver::Exchange(Register reg, const Address& mem) {
UNREACHABLE();
}
// Do not call or implement this function. Instead, use the form below that
// uses offsets from the frame pointer instead of Addresses.
void ParallelMoveResolver::Exchange(const Address& mem1, const Address& mem2) {
UNREACHABLE();
}
void ParallelMoveResolver::Exchange(Register reg, intptr_t stack_offset) {
__ mov(TMP, reg);
__ LoadFromOffset(reg, FP, stack_offset);
__ StoreToOffset(TMP, FP, stack_offset);
}
void ParallelMoveResolver::Exchange(intptr_t stack_offset1,
intptr_t stack_offset2) {
ScratchRegisterScope ensure_scratch(this, TMP);
__ LoadFromOffset(ensure_scratch.reg(), FP, stack_offset1);
__ LoadFromOffset(TMP, FP, stack_offset2);
__ StoreToOffset(ensure_scratch.reg(), FP, stack_offset2);
__ StoreToOffset(TMP, FP, stack_offset1);
}
void ParallelMoveResolver::SpillScratch(Register reg) {
__ TraceSimMsg("ParallelMoveResolver::SpillScratch");
__ Push(reg);
}
void ParallelMoveResolver::RestoreScratch(Register reg) {
__ TraceSimMsg("ParallelMoveResolver::RestoreScratch");
__ Pop(reg);
}
void ParallelMoveResolver::SpillFpuScratch(FpuRegister reg) {
__ TraceSimMsg("ParallelMoveResolver::SpillFpuScratch");
__ AddImmediate(SP, -kDoubleSize);
__ StoreDToOffset(reg, SP, 0);
}
void ParallelMoveResolver::RestoreFpuScratch(FpuRegister reg) {
__ TraceSimMsg("ParallelMoveResolver::RestoreFpuScratch");
__ LoadDFromOffset(reg, SP, 0);
__ AddImmediate(SP, kDoubleSize);
}
#undef __
} // namespace dart
#endif // defined TARGET_ARCH_MIPS