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/*
* Copyright (C) 2016 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef ART_COMPILER_OPTIMIZING_CODE_GENERATOR_ARM_VIXL_H_
#define ART_COMPILER_OPTIMIZING_CODE_GENERATOR_ARM_VIXL_H_
#include "base/enums.h"
#include "code_generator.h"
#include "common_arm.h"
#include "driver/compiler_options.h"
#include "nodes.h"
#include "string_reference.h"
#include "parallel_move_resolver.h"
#include "utils/arm/assembler_arm_vixl.h"
#include "utils/type_reference.h"
// TODO(VIXL): make vixl clean wrt -Wshadow.
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wshadow"
#include "aarch32/constants-aarch32.h"
#include "aarch32/instructions-aarch32.h"
#include "aarch32/macro-assembler-aarch32.h"
#pragma GCC diagnostic pop
// Default to use the VIXL-based backend on ARM.
#ifdef ART_USE_OLD_ARM_BACKEND
static constexpr bool kArmUseVIXL32 = false;
#else
static constexpr bool kArmUseVIXL32 = true;
#endif
namespace art {
namespace arm {
static const vixl::aarch32::Register kParameterCoreRegistersVIXL[] = {
vixl::aarch32::r1,
vixl::aarch32::r2,
vixl::aarch32::r3
};
static const size_t kParameterCoreRegistersLengthVIXL = arraysize(kParameterCoreRegistersVIXL);
static const vixl::aarch32::SRegister kParameterFpuRegistersVIXL[] = {
vixl::aarch32::s0,
vixl::aarch32::s1,
vixl::aarch32::s2,
vixl::aarch32::s3,
vixl::aarch32::s4,
vixl::aarch32::s5,
vixl::aarch32::s6,
vixl::aarch32::s7,
vixl::aarch32::s8,
vixl::aarch32::s9,
vixl::aarch32::s10,
vixl::aarch32::s11,
vixl::aarch32::s12,
vixl::aarch32::s13,
vixl::aarch32::s14,
vixl::aarch32::s15
};
static const size_t kParameterFpuRegistersLengthVIXL = arraysize(kParameterFpuRegistersVIXL);
static const vixl::aarch32::Register kMethodRegister = vixl::aarch32::r0;
static const vixl::aarch32::Register kCoreAlwaysSpillRegister = vixl::aarch32::r5;
// Callee saves core registers r5, r6, r7, r8, r10, r11, and lr.
static const vixl::aarch32::RegisterList kCoreCalleeSaves = vixl::aarch32::RegisterList::Union(
vixl::aarch32::RegisterList(vixl::aarch32::r5,
vixl::aarch32::r6,
vixl::aarch32::r7,
vixl::aarch32::r8),
vixl::aarch32::RegisterList(vixl::aarch32::r10,
vixl::aarch32::r11,
vixl::aarch32::lr));
// Callee saves FP registers s16 to s31 inclusive.
static const vixl::aarch32::SRegisterList kFpuCalleeSaves =
vixl::aarch32::SRegisterList(vixl::aarch32::s16, 16);
static const vixl::aarch32::Register kRuntimeParameterCoreRegistersVIXL[] = {
vixl::aarch32::r0,
vixl::aarch32::r1,
vixl::aarch32::r2,
vixl::aarch32::r3
};
static const size_t kRuntimeParameterCoreRegistersLengthVIXL =
arraysize(kRuntimeParameterCoreRegistersVIXL);
static const vixl::aarch32::SRegister kRuntimeParameterFpuRegistersVIXL[] = {
vixl::aarch32::s0,
vixl::aarch32::s1,
vixl::aarch32::s2,
vixl::aarch32::s3
};
static const size_t kRuntimeParameterFpuRegistersLengthVIXL =
arraysize(kRuntimeParameterFpuRegistersVIXL);
class LoadClassSlowPathARMVIXL;
class CodeGeneratorARMVIXL;
using VIXLInt32Literal = vixl::aarch32::Literal<int32_t>;
using VIXLUInt32Literal = vixl::aarch32::Literal<uint32_t>;
class JumpTableARMVIXL : public DeletableArenaObject<kArenaAllocSwitchTable> {
public:
explicit JumpTableARMVIXL(HPackedSwitch* switch_instr)
: switch_instr_(switch_instr),
table_start_(),
bb_addresses_(switch_instr->GetArena()->Adapter(kArenaAllocCodeGenerator)) {
uint32_t num_entries = switch_instr_->GetNumEntries();
for (uint32_t i = 0; i < num_entries; i++) {
VIXLInt32Literal *lit = new VIXLInt32Literal(0, vixl32::RawLiteral::kManuallyPlaced);
bb_addresses_.emplace_back(lit);
}
}
vixl::aarch32::Label* GetTableStartLabel() { return &table_start_; }
void EmitTable(CodeGeneratorARMVIXL* codegen);
void FixTable(CodeGeneratorARMVIXL* codegen);
private:
HPackedSwitch* const switch_instr_;
vixl::aarch32::Label table_start_;
ArenaVector<std::unique_ptr<VIXLInt32Literal>> bb_addresses_;
DISALLOW_COPY_AND_ASSIGN(JumpTableARMVIXL);
};
class InvokeRuntimeCallingConventionARMVIXL
: public CallingConvention<vixl::aarch32::Register, vixl::aarch32::SRegister> {
public:
InvokeRuntimeCallingConventionARMVIXL()
: CallingConvention(kRuntimeParameterCoreRegistersVIXL,
kRuntimeParameterCoreRegistersLengthVIXL,
kRuntimeParameterFpuRegistersVIXL,
kRuntimeParameterFpuRegistersLengthVIXL,
kArmPointerSize) {}
private:
DISALLOW_COPY_AND_ASSIGN(InvokeRuntimeCallingConventionARMVIXL);
};
class InvokeDexCallingConventionARMVIXL
: public CallingConvention<vixl::aarch32::Register, vixl::aarch32::SRegister> {
public:
InvokeDexCallingConventionARMVIXL()
: CallingConvention(kParameterCoreRegistersVIXL,
kParameterCoreRegistersLengthVIXL,
kParameterFpuRegistersVIXL,
kParameterFpuRegistersLengthVIXL,
kArmPointerSize) {}
private:
DISALLOW_COPY_AND_ASSIGN(InvokeDexCallingConventionARMVIXL);
};
class InvokeDexCallingConventionVisitorARMVIXL : public InvokeDexCallingConventionVisitor {
public:
InvokeDexCallingConventionVisitorARMVIXL() {}
virtual ~InvokeDexCallingConventionVisitorARMVIXL() {}
Location GetNextLocation(Primitive::Type type) OVERRIDE;
Location GetReturnLocation(Primitive::Type type) const OVERRIDE;
Location GetMethodLocation() const OVERRIDE;
private:
InvokeDexCallingConventionARMVIXL calling_convention;
uint32_t double_index_ = 0;
DISALLOW_COPY_AND_ASSIGN(InvokeDexCallingConventionVisitorARMVIXL);
};
class FieldAccessCallingConventionARMVIXL : public FieldAccessCallingConvention {
public:
FieldAccessCallingConventionARMVIXL() {}
Location GetObjectLocation() const OVERRIDE {
return helpers::LocationFrom(vixl::aarch32::r1);
}
Location GetFieldIndexLocation() const OVERRIDE {
return helpers::LocationFrom(vixl::aarch32::r0);
}
Location GetReturnLocation(Primitive::Type type) const OVERRIDE {
return Primitive::Is64BitType(type)
? helpers::LocationFrom(vixl::aarch32::r0, vixl::aarch32::r1)
: helpers::LocationFrom(vixl::aarch32::r0);
}
Location GetSetValueLocation(Primitive::Type type, bool is_instance) const OVERRIDE {
return Primitive::Is64BitType(type)
? helpers::LocationFrom(vixl::aarch32::r2, vixl::aarch32::r3)
: (is_instance
? helpers::LocationFrom(vixl::aarch32::r2)
: helpers::LocationFrom(vixl::aarch32::r1));
}
Location GetFpuLocation(Primitive::Type type) const OVERRIDE {
return Primitive::Is64BitType(type)
? helpers::LocationFrom(vixl::aarch32::s0, vixl::aarch32::s1)
: helpers::LocationFrom(vixl::aarch32::s0);
}
private:
DISALLOW_COPY_AND_ASSIGN(FieldAccessCallingConventionARMVIXL);
};
class SlowPathCodeARMVIXL : public SlowPathCode {
public:
explicit SlowPathCodeARMVIXL(HInstruction* instruction)
: SlowPathCode(instruction), entry_label_(), exit_label_() {}
vixl::aarch32::Label* GetEntryLabel() { return &entry_label_; }
vixl::aarch32::Label* GetExitLabel() { return &exit_label_; }
void SaveLiveRegisters(CodeGenerator* codegen, LocationSummary* locations) OVERRIDE;
void RestoreLiveRegisters(CodeGenerator* codegen, LocationSummary* locations) OVERRIDE;
private:
vixl::aarch32::Label entry_label_;
vixl::aarch32::Label exit_label_;
DISALLOW_COPY_AND_ASSIGN(SlowPathCodeARMVIXL);
};
class ParallelMoveResolverARMVIXL : public ParallelMoveResolverWithSwap {
public:
ParallelMoveResolverARMVIXL(ArenaAllocator* allocator, CodeGeneratorARMVIXL* codegen)
: ParallelMoveResolverWithSwap(allocator), codegen_(codegen) {}
void EmitMove(size_t index) OVERRIDE;
void EmitSwap(size_t index) OVERRIDE;
void SpillScratch(int reg) OVERRIDE;
void RestoreScratch(int reg) OVERRIDE;
ArmVIXLAssembler* GetAssembler() const;
private:
void Exchange(vixl32::Register reg, int mem);
void Exchange(int mem1, int mem2);
CodeGeneratorARMVIXL* const codegen_;
DISALLOW_COPY_AND_ASSIGN(ParallelMoveResolverARMVIXL);
};
class LocationsBuilderARMVIXL : public HGraphVisitor {
public:
LocationsBuilderARMVIXL(HGraph* graph, CodeGeneratorARMVIXL* codegen)
: HGraphVisitor(graph), codegen_(codegen) {}
#define DECLARE_VISIT_INSTRUCTION(name, super) \
void Visit##name(H##name* instr) OVERRIDE;
FOR_EACH_CONCRETE_INSTRUCTION_COMMON(DECLARE_VISIT_INSTRUCTION)
FOR_EACH_CONCRETE_INSTRUCTION_ARM(DECLARE_VISIT_INSTRUCTION)
FOR_EACH_CONCRETE_INSTRUCTION_SHARED(DECLARE_VISIT_INSTRUCTION)
#undef DECLARE_VISIT_INSTRUCTION
void VisitInstruction(HInstruction* instruction) OVERRIDE {
LOG(FATAL) << "Unreachable instruction " << instruction->DebugName()
<< " (id " << instruction->GetId() << ")";
}
private:
void HandleInvoke(HInvoke* invoke);
void HandleBitwiseOperation(HBinaryOperation* operation, Opcode opcode);
void HandleCondition(HCondition* condition);
void HandleIntegerRotate(LocationSummary* locations);
void HandleLongRotate(LocationSummary* locations);
void HandleShift(HBinaryOperation* operation);
void HandleFieldSet(HInstruction* instruction, const FieldInfo& field_info);
void HandleFieldGet(HInstruction* instruction, const FieldInfo& field_info);
Location ArithmeticZeroOrFpuRegister(HInstruction* input);
Location ArmEncodableConstantOrRegister(HInstruction* constant, Opcode opcode);
bool CanEncodeConstantAsImmediate(HConstant* input_cst, Opcode opcode);
bool CanEncodeConstantAsImmediate(uint32_t value, Opcode opcode, SetCc set_cc = kCcDontCare);
CodeGeneratorARMVIXL* const codegen_;
InvokeDexCallingConventionVisitorARMVIXL parameter_visitor_;
DISALLOW_COPY_AND_ASSIGN(LocationsBuilderARMVIXL);
};
class InstructionCodeGeneratorARMVIXL : public InstructionCodeGenerator {
public:
InstructionCodeGeneratorARMVIXL(HGraph* graph, CodeGeneratorARMVIXL* codegen);
#define DECLARE_VISIT_INSTRUCTION(name, super) \
void Visit##name(H##name* instr) OVERRIDE;
FOR_EACH_CONCRETE_INSTRUCTION_COMMON(DECLARE_VISIT_INSTRUCTION)
FOR_EACH_CONCRETE_INSTRUCTION_ARM(DECLARE_VISIT_INSTRUCTION)
FOR_EACH_CONCRETE_INSTRUCTION_SHARED(DECLARE_VISIT_INSTRUCTION)
#undef DECLARE_VISIT_INSTRUCTION
void VisitInstruction(HInstruction* instruction) OVERRIDE {
LOG(FATAL) << "Unreachable instruction " << instruction->DebugName()
<< " (id " << instruction->GetId() << ")";
}
ArmVIXLAssembler* GetAssembler() const { return assembler_; }
ArmVIXLMacroAssembler* GetVIXLAssembler() { return GetAssembler()->GetVIXLAssembler(); }
private:
// Generate code for the given suspend check. If not null, `successor`
// is the block to branch to if the suspend check is not needed, and after
// the suspend call.
void GenerateSuspendCheck(HSuspendCheck* instruction, HBasicBlock* successor);
void GenerateClassInitializationCheck(LoadClassSlowPathARMVIXL* slow_path,
vixl32::Register class_reg);
void GenerateAndConst(vixl::aarch32::Register out, vixl::aarch32::Register first, uint32_t value);
void GenerateOrrConst(vixl::aarch32::Register out, vixl::aarch32::Register first, uint32_t value);
void GenerateEorConst(vixl::aarch32::Register out, vixl::aarch32::Register first, uint32_t value);
void GenerateAddLongConst(Location out, Location first, uint64_t value);
void HandleBitwiseOperation(HBinaryOperation* operation);
void HandleCondition(HCondition* condition);
void HandleIntegerRotate(HRor* ror);
void HandleLongRotate(HRor* ror);
void HandleShift(HBinaryOperation* operation);
void GenerateWideAtomicStore(vixl::aarch32::Register addr,
uint32_t offset,
vixl::aarch32::Register value_lo,
vixl::aarch32::Register value_hi,
vixl::aarch32::Register temp1,
vixl::aarch32::Register temp2,
HInstruction* instruction);
void GenerateWideAtomicLoad(vixl::aarch32::Register addr,
uint32_t offset,
vixl::aarch32::Register out_lo,
vixl::aarch32::Register out_hi);
void HandleFieldSet(HInstruction* instruction,
const FieldInfo& field_info,
bool value_can_be_null);
void HandleFieldGet(HInstruction* instruction, const FieldInfo& field_info);
// Generate a heap reference load using one register `out`:
//
// out <- *(out + offset)
//
// while honoring heap poisoning and/or read barriers (if any).
//
// Location `maybe_temp` is used when generating a read barrier and
// shall be a register in that case; it may be an invalid location
// otherwise.
void GenerateReferenceLoadOneRegister(HInstruction* instruction,
Location out,
uint32_t offset,
Location maybe_temp,
ReadBarrierOption read_barrier_option);
// Generate a heap reference load using two different registers
// `out` and `obj`:
//
// out <- *(obj + offset)
//
// while honoring heap poisoning and/or read barriers (if any).
//
// Location `maybe_temp` is used when generating a Baker's (fast
// path) read barrier and shall be a register in that case; it may
// be an invalid location otherwise.
void GenerateReferenceLoadTwoRegisters(HInstruction* instruction,
Location out,
Location obj,
uint32_t offset,
Location maybe_temp,
ReadBarrierOption read_barrier_option);
// Generate a GC root reference load:
//
// root <- *(obj + offset)
//
// while honoring read barriers based on read_barrier_option.
void GenerateGcRootFieldLoad(HInstruction* instruction,
Location root,
vixl::aarch32::Register obj,
uint32_t offset,
ReadBarrierOption read_barrier_option);
void GenerateTestAndBranch(HInstruction* instruction,
size_t condition_input_index,
vixl::aarch32::Label* true_target,
vixl::aarch32::Label* false_target,
bool far_target = true);
void GenerateCompareTestAndBranch(HCondition* condition,
vixl::aarch32::Label* true_target,
vixl::aarch32::Label* false_target);
void GenerateVcmp(HInstruction* instruction);
void GenerateFPJumps(HCondition* cond,
vixl::aarch32::Label* true_label,
vixl::aarch32::Label* false_label);
void GenerateLongComparesAndJumps(HCondition* cond,
vixl::aarch32::Label* true_label,
vixl::aarch32::Label* false_label);
void DivRemOneOrMinusOne(HBinaryOperation* instruction);
void DivRemByPowerOfTwo(HBinaryOperation* instruction);
void GenerateDivRemWithAnyConstant(HBinaryOperation* instruction);
void GenerateDivRemConstantIntegral(HBinaryOperation* instruction);
void HandleGoto(HInstruction* got, HBasicBlock* successor);
ArmVIXLAssembler* const assembler_;
CodeGeneratorARMVIXL* const codegen_;
DISALLOW_COPY_AND_ASSIGN(InstructionCodeGeneratorARMVIXL);
};
class CodeGeneratorARMVIXL : public CodeGenerator {
public:
CodeGeneratorARMVIXL(HGraph* graph,
const ArmInstructionSetFeatures& isa_features,
const CompilerOptions& compiler_options,
OptimizingCompilerStats* stats = nullptr);
virtual ~CodeGeneratorARMVIXL() {}
void GenerateFrameEntry() OVERRIDE;
void GenerateFrameExit() OVERRIDE;
void Bind(HBasicBlock* block) OVERRIDE;
void MoveConstant(Location destination, int32_t value) OVERRIDE;
void MoveLocation(Location dst, Location src, Primitive::Type dst_type) OVERRIDE;
void AddLocationAsTemp(Location location, LocationSummary* locations) OVERRIDE;
size_t SaveCoreRegister(size_t stack_index, uint32_t reg_id) OVERRIDE;
size_t RestoreCoreRegister(size_t stack_index, uint32_t reg_id) OVERRIDE;
size_t SaveFloatingPointRegister(size_t stack_index, uint32_t reg_id) OVERRIDE;
size_t RestoreFloatingPointRegister(size_t stack_index, uint32_t reg_id) OVERRIDE;
size_t GetWordSize() const OVERRIDE {
return static_cast<size_t>(kArmPointerSize);
}
size_t GetFloatingPointSpillSlotSize() const OVERRIDE { return vixl::aarch32::kRegSizeInBytes; }
HGraphVisitor* GetLocationBuilder() OVERRIDE { return &location_builder_; }
HGraphVisitor* GetInstructionVisitor() OVERRIDE { return &instruction_visitor_; }
ArmVIXLAssembler* GetAssembler() OVERRIDE { return &assembler_; }
const ArmVIXLAssembler& GetAssembler() const OVERRIDE { return assembler_; }
ArmVIXLMacroAssembler* GetVIXLAssembler() { return GetAssembler()->GetVIXLAssembler(); }
uintptr_t GetAddressOf(HBasicBlock* block) OVERRIDE {
vixl::aarch32::Label* block_entry_label = GetLabelOf(block);
DCHECK(block_entry_label->IsBound());
return block_entry_label->GetLocation();
}
void FixJumpTables();
void SetupBlockedRegisters() const OVERRIDE;
void DumpCoreRegister(std::ostream& stream, int reg) const OVERRIDE;
void DumpFloatingPointRegister(std::ostream& stream, int reg) const OVERRIDE;
ParallelMoveResolver* GetMoveResolver() OVERRIDE { return &move_resolver_; }
InstructionSet GetInstructionSet() const OVERRIDE { return InstructionSet::kThumb2; }
// Helper method to move a 32-bit value between two locations.
void Move32(Location destination, Location source);
void LoadFromShiftedRegOffset(Primitive::Type type,
Location out_loc,
vixl::aarch32::Register base,
vixl::aarch32::Register reg_index,
vixl::aarch32::Condition cond = vixl::aarch32::al);
void StoreToShiftedRegOffset(Primitive::Type type,
Location out_loc,
vixl::aarch32::Register base,
vixl::aarch32::Register reg_index,
vixl::aarch32::Condition cond = vixl::aarch32::al);
// Generate code to invoke a runtime entry point.
void InvokeRuntime(QuickEntrypointEnum entrypoint,
HInstruction* instruction,
uint32_t dex_pc,
SlowPathCode* slow_path = nullptr) OVERRIDE;
// Generate code to invoke a runtime entry point, but do not record
// PC-related information in a stack map.
void InvokeRuntimeWithoutRecordingPcInfo(int32_t entry_point_offset,
HInstruction* instruction,
SlowPathCode* slow_path);
// Emit a write barrier.
void MarkGCCard(vixl::aarch32::Register temp,
vixl::aarch32::Register card,
vixl::aarch32::Register object,
vixl::aarch32::Register value,
bool can_be_null);
void GenerateMemoryBarrier(MemBarrierKind kind);
vixl::aarch32::Label* GetLabelOf(HBasicBlock* block) {
block = FirstNonEmptyBlock(block);
return &(block_labels_[block->GetBlockId()]);
}
void Initialize() OVERRIDE {
block_labels_.resize(GetGraph()->GetBlocks().size());
}
void Finalize(CodeAllocator* allocator) OVERRIDE;
const ArmInstructionSetFeatures& GetInstructionSetFeatures() const { return isa_features_; }
bool NeedsTwoRegisters(Primitive::Type type) const OVERRIDE {
return type == Primitive::kPrimDouble || type == Primitive::kPrimLong;
}
void ComputeSpillMask() OVERRIDE;
vixl::aarch32::Label* GetFrameEntryLabel() { return &frame_entry_label_; }
// Check if the desired_string_load_kind is supported. If it is, return it,
// otherwise return a fall-back kind that should be used instead.
HLoadString::LoadKind GetSupportedLoadStringKind(
HLoadString::LoadKind desired_string_load_kind) OVERRIDE;
// Check if the desired_class_load_kind is supported. If it is, return it,
// otherwise return a fall-back kind that should be used instead.
HLoadClass::LoadKind GetSupportedLoadClassKind(
HLoadClass::LoadKind desired_class_load_kind) OVERRIDE;
// Check if the desired_dispatch_info is supported. If it is, return it,
// otherwise return a fall-back info that should be used instead.
HInvokeStaticOrDirect::DispatchInfo GetSupportedInvokeStaticOrDirectDispatch(
const HInvokeStaticOrDirect::DispatchInfo& desired_dispatch_info,
HInvokeStaticOrDirect* invoke) OVERRIDE;
void GenerateStaticOrDirectCall(HInvokeStaticOrDirect* invoke, Location temp) OVERRIDE;
void GenerateVirtualCall(HInvokeVirtual* invoke, Location temp) OVERRIDE;
void MoveFromReturnRegister(Location trg, Primitive::Type type) OVERRIDE;
// The PcRelativePatchInfo is used for PC-relative addressing of dex cache arrays
// and boot image strings/types. The only difference is the interpretation of the
// offset_or_index. The PC-relative address is loaded with three instructions,
// MOVW+MOVT to load the offset to base_reg and then ADD base_reg, PC. The offset
// is calculated from the ADD's effective PC, i.e. PC+4 on Thumb2. Though we
// currently emit these 3 instructions together, instruction scheduling could
// split this sequence apart, so we keep separate labels for each of them.
struct PcRelativePatchInfo {
PcRelativePatchInfo(const DexFile& dex_file, uint32_t off_or_idx)
: target_dex_file(dex_file), offset_or_index(off_or_idx) { }
PcRelativePatchInfo(PcRelativePatchInfo&& other) = default;
const DexFile& target_dex_file;
// Either the dex cache array element offset or the string/type index.
uint32_t offset_or_index;
vixl::aarch32::Label movw_label;
vixl::aarch32::Label movt_label;
vixl::aarch32::Label add_pc_label;
};
PcRelativePatchInfo* NewPcRelativeStringPatch(const DexFile& dex_file,
dex::StringIndex string_index);
PcRelativePatchInfo* NewPcRelativeTypePatch(const DexFile& dex_file, dex::TypeIndex type_index);
PcRelativePatchInfo* NewTypeBssEntryPatch(const DexFile& dex_file, dex::TypeIndex type_index);
PcRelativePatchInfo* NewPcRelativeDexCacheArrayPatch(const DexFile& dex_file,
uint32_t element_offset);
VIXLUInt32Literal* DeduplicateBootImageStringLiteral(const DexFile& dex_file,
dex::StringIndex string_index);
VIXLUInt32Literal* DeduplicateBootImageTypeLiteral(const DexFile& dex_file,
dex::TypeIndex type_index);
VIXLUInt32Literal* DeduplicateBootImageAddressLiteral(uint32_t address);
VIXLUInt32Literal* DeduplicateDexCacheAddressLiteral(uint32_t address);
VIXLUInt32Literal* DeduplicateJitStringLiteral(const DexFile& dex_file,
dex::StringIndex string_index,
Handle<mirror::String> handle);
VIXLUInt32Literal* DeduplicateJitClassLiteral(const DexFile& dex_file,
dex::TypeIndex type_index,
Handle<mirror::Class> handle);
void EmitLinkerPatches(ArenaVector<LinkerPatch>* linker_patches) OVERRIDE;
void EmitJitRootPatches(uint8_t* code, const uint8_t* roots_data) OVERRIDE;
// Fast path implementation of ReadBarrier::Barrier for a heap
// reference field load when Baker's read barriers are used.
void GenerateFieldLoadWithBakerReadBarrier(HInstruction* instruction,
Location ref,
vixl::aarch32::Register obj,
uint32_t offset,
Location temp,
bool needs_null_check);
// Fast path implementation of ReadBarrier::Barrier for a heap
// reference array load when Baker's read barriers are used.
void GenerateArrayLoadWithBakerReadBarrier(HInstruction* instruction,
Location ref,
vixl::aarch32::Register obj,
uint32_t data_offset,
Location index,
Location temp,
bool needs_null_check);
// Factored implementation, used by GenerateFieldLoadWithBakerReadBarrier,
// GenerateArrayLoadWithBakerReadBarrier and some intrinsics.
//
// Load the object reference located at the address
// `obj + offset + (index << scale_factor)`, held by object `obj`, into
// `ref`, and mark it if needed.
//
// If `always_update_field` is true, the value of the reference is
// atomically updated in the holder (`obj`). This operation
// requires an extra temporary register, which must be provided as a
// non-null pointer (`temp2`).
void GenerateReferenceLoadWithBakerReadBarrier(HInstruction* instruction,
Location ref,
vixl::aarch32::Register obj,
uint32_t offset,
Location index,
ScaleFactor scale_factor,
Location temp,
bool needs_null_check,
bool always_update_field = false,
vixl::aarch32::Register* temp2 = nullptr);
// Generate a read barrier for a heap reference within `instruction`
// using a slow path.
//
// A read barrier for an object reference read from the heap is
// implemented as a call to the artReadBarrierSlow runtime entry
// point, which is passed the values in locations `ref`, `obj`, and
// `offset`:
//
// mirror::Object* artReadBarrierSlow(mirror::Object* ref,
// mirror::Object* obj,
// uint32_t offset);
//
// The `out` location contains the value returned by
// artReadBarrierSlow.
//
// When `index` is provided (i.e. for array accesses), the offset
// value passed to artReadBarrierSlow is adjusted to take `index`
// into account.
void GenerateReadBarrierSlow(HInstruction* instruction,
Location out,
Location ref,
Location obj,
uint32_t offset,
Location index = Location::NoLocation());
// If read barriers are enabled, generate a read barrier for a heap
// reference using a slow path. If heap poisoning is enabled, also
// unpoison the reference in `out`.
void MaybeGenerateReadBarrierSlow(HInstruction* instruction,
Location out,
Location ref,
Location obj,
uint32_t offset,
Location index = Location::NoLocation());
// Generate a read barrier for a GC root within `instruction` using
// a slow path.
//
// A read barrier for an object reference GC root is implemented as
// a call to the artReadBarrierForRootSlow runtime entry point,
// which is passed the value in location `root`:
//
// mirror::Object* artReadBarrierForRootSlow(GcRoot<mirror::Object>* root);
//
// The `out` location contains the value returned by
// artReadBarrierForRootSlow.
void GenerateReadBarrierForRootSlow(HInstruction* instruction, Location out, Location root);
void GenerateNop() OVERRIDE;
void GenerateImplicitNullCheck(HNullCheck* instruction) OVERRIDE;
void GenerateExplicitNullCheck(HNullCheck* instruction) OVERRIDE;
JumpTableARMVIXL* CreateJumpTable(HPackedSwitch* switch_instr) {
jump_tables_.emplace_back(new (GetGraph()->GetArena()) JumpTableARMVIXL(switch_instr));
return jump_tables_.back().get();
}
void EmitJumpTables();
void EmitMovwMovtPlaceholder(CodeGeneratorARMVIXL::PcRelativePatchInfo* labels,
vixl::aarch32::Register out);
private:
vixl::aarch32::Register GetInvokeStaticOrDirectExtraParameter(HInvokeStaticOrDirect* invoke,
vixl::aarch32::Register temp);
using Uint32ToLiteralMap = ArenaSafeMap<uint32_t, VIXLUInt32Literal*>;
using MethodToLiteralMap =
ArenaSafeMap<MethodReference, VIXLUInt32Literal*, MethodReferenceComparator>;
using StringToLiteralMap = ArenaSafeMap<StringReference,
VIXLUInt32Literal*,
StringReferenceValueComparator>;
using TypeToLiteralMap = ArenaSafeMap<TypeReference,
VIXLUInt32Literal*,
TypeReferenceValueComparator>;
VIXLUInt32Literal* DeduplicateUint32Literal(uint32_t value, Uint32ToLiteralMap* map);
VIXLUInt32Literal* DeduplicateMethodLiteral(MethodReference target_method,
MethodToLiteralMap* map);
PcRelativePatchInfo* NewPcRelativePatch(const DexFile& dex_file,
uint32_t offset_or_index,
ArenaDeque<PcRelativePatchInfo>* patches);
template <LinkerPatch (*Factory)(size_t, const DexFile*, uint32_t, uint32_t)>
static void EmitPcRelativeLinkerPatches(const ArenaDeque<PcRelativePatchInfo>& infos,
ArenaVector<LinkerPatch>* linker_patches);
// Labels for each block that will be compiled.
// We use a deque so that the `vixl::aarch32::Label` objects do not move in memory.
ArenaDeque<vixl::aarch32::Label> block_labels_; // Indexed by block id.
vixl::aarch32::Label frame_entry_label_;
ArenaVector<std::unique_ptr<JumpTableARMVIXL>> jump_tables_;
LocationsBuilderARMVIXL location_builder_;
InstructionCodeGeneratorARMVIXL instruction_visitor_;
ParallelMoveResolverARMVIXL move_resolver_;
ArmVIXLAssembler assembler_;
const ArmInstructionSetFeatures& isa_features_;
// Deduplication map for 32-bit literals, used for non-patchable boot image addresses.
Uint32ToLiteralMap uint32_literals_;
// PC-relative patch info for each HArmDexCacheArraysBase.
ArenaDeque<PcRelativePatchInfo> pc_relative_dex_cache_patches_;
// Deduplication map for boot string literals for kBootImageLinkTimeAddress.
StringToLiteralMap boot_image_string_patches_;
// PC-relative String patch info; type depends on configuration (app .bss or boot image PIC).
ArenaDeque<PcRelativePatchInfo> pc_relative_string_patches_;
// Deduplication map for boot type literals for kBootImageLinkTimeAddress.
TypeToLiteralMap boot_image_type_patches_;
// PC-relative type patch info for kBootImageLinkTimePcRelative.
ArenaDeque<PcRelativePatchInfo> pc_relative_type_patches_;
// PC-relative type patch info for kBssEntry.
ArenaDeque<PcRelativePatchInfo> type_bss_entry_patches_;
// Deduplication map for patchable boot image addresses.
Uint32ToLiteralMap boot_image_address_patches_;
// Patches for string literals in JIT compiled code.
StringToLiteralMap jit_string_patches_;
// Patches for class literals in JIT compiled code.
TypeToLiteralMap jit_class_patches_;
DISALLOW_COPY_AND_ASSIGN(CodeGeneratorARMVIXL);
};
} // namespace arm
} // namespace art
#endif // ART_COMPILER_OPTIMIZING_CODE_GENERATOR_ARM_VIXL_H_