The debugger needs this for selective deoptimization.
Change-Id: I8100000449b56e619288fb05d41ea6f02b53b334
endif
LIBART_COMPILER_ENUM_OPERATOR_OUT_HEADER_FILES := \
- dex/compiler_enums.h \
- dex/quick/dex_file_method_inliner.h
+ dex/compiler_enums.h
# $(1): target or host
# $(2): ndebug or debug
* limitations under the License.
*/
+#include "dex_file_method_inliner.h"
+
#include <algorithm>
+
#include "base/macros.h"
#include "base/mutex.h"
#include "base/mutex-inl.h"
#include "verifier/method_verifier.h"
#include "verifier/method_verifier-inl.h"
-#include "dex_file_method_inliner.h"
-
namespace art {
-namespace { // anonymous namespace
-
-constexpr uint8_t kIGetIPutOpSizes[] = {
- kWord, // IGET, IPUT
- kLong, // IGET_WIDE, IPUT_WIDE
- kWord, // IGET_OBJECT, IPUT_OBJECT
- kSignedByte, // IGET_BOOLEAN, IPUT_BOOLEAN
- kSignedByte, // IGET_BYTE, IPUT_BYTE
- kUnsignedHalf, // IGET_CHAR, IPUT_CHAR
- kSignedHalf, // IGET_SHORT, IPUT_SHORT
-};
-
-} // anonymous namespace
-
const uint32_t DexFileMethodInliner::kIndexUnresolved;
const char* const DexFileMethodInliner::kClassCacheNames[] = {
"Z", // kClassCacheBoolean
bool DexFileMethodInliner::AnalyseMethodCode(verifier::MethodVerifier* verifier) {
InlineMethod method;
- bool success = AnalyseMethodCode(verifier, &method);
+ bool success = InlineMethodAnalyser::AnalyseMethodCode(verifier, &method);
return success && AddInlineMethod(verifier->GetMethodReference().dex_method_index, method);
}
-bool DexFileMethodInliner::AnalyseMethodCode(verifier::MethodVerifier* verifier,
- InlineMethod* method) {
- // We currently support only plain return or 2-instruction methods.
-
- const DexFile::CodeItem* code_item = verifier->CodeItem();
- DCHECK_NE(code_item->insns_size_in_code_units_, 0u);
- const Instruction* instruction = Instruction::At(code_item->insns_);
- Instruction::Code opcode = instruction->Opcode();
-
- switch (opcode) {
- case Instruction::RETURN_VOID:
- method->opcode = kInlineOpNop;
- method->flags = kInlineSpecial;
- method->d.data = 0u;
- return true;
- case Instruction::RETURN:
- case Instruction::RETURN_OBJECT:
- case Instruction::RETURN_WIDE:
- return AnalyseReturnMethod(code_item, method);
- case Instruction::CONST:
- case Instruction::CONST_4:
- case Instruction::CONST_16:
- case Instruction::CONST_HIGH16:
- // TODO: Support wide constants (RETURN_WIDE).
- return AnalyseConstMethod(code_item, method);
- case Instruction::IGET:
- case Instruction::IGET_OBJECT:
- case Instruction::IGET_BOOLEAN:
- case Instruction::IGET_BYTE:
- case Instruction::IGET_CHAR:
- case Instruction::IGET_SHORT:
- case Instruction::IGET_WIDE:
- return AnalyseIGetMethod(verifier, method);
- case Instruction::IPUT:
- case Instruction::IPUT_OBJECT:
- case Instruction::IPUT_BOOLEAN:
- case Instruction::IPUT_BYTE:
- case Instruction::IPUT_CHAR:
- case Instruction::IPUT_SHORT:
- case Instruction::IPUT_WIDE:
- return AnalyseIPutMethod(verifier, method);
- default:
- return false;
- }
-}
-
bool DexFileMethodInliner::IsIntrinsic(uint32_t method_index) {
ReaderMutexLock mu(Thread::Current(), lock_);
auto it = inline_methods_.find(method_index);
}
}
-bool DexFileMethodInliner::AnalyseReturnMethod(const DexFile::CodeItem* code_item,
- InlineMethod* result) {
- const Instruction* return_instruction = Instruction::At(code_item->insns_);
- Instruction::Code return_opcode = return_instruction->Opcode();
- uint16_t size = (return_opcode == Instruction::RETURN_WIDE) ? kLong : kWord;
- uint16_t is_object = (return_opcode == Instruction::RETURN_OBJECT) ? 1u : 0u;
- uint32_t reg = return_instruction->VRegA_11x();
- uint32_t arg_start = code_item->registers_size_ - code_item->ins_size_;
- DCHECK_GE(reg, arg_start);
- DCHECK_LT(size == kLong ? reg + 1 : reg, code_item->registers_size_);
-
- result->opcode = kInlineOpReturnArg;
- result->flags = kInlineSpecial;
- InlineReturnArgData* data = &result->d.return_data;
- data->arg = reg - arg_start;
- data->op_size = size;
- data->is_object = is_object;
- data->reserved = 0u;
- data->reserved2 = 0u;
- return true;
-}
-
-bool DexFileMethodInliner::AnalyseConstMethod(const DexFile::CodeItem* code_item,
- InlineMethod* result) {
- const Instruction* instruction = Instruction::At(code_item->insns_);
- const Instruction* return_instruction = instruction->Next();
- Instruction::Code return_opcode = return_instruction->Opcode();
- if (return_opcode != Instruction::RETURN &&
- return_opcode != Instruction::RETURN_OBJECT) {
- return false;
- }
-
- uint32_t return_reg = return_instruction->VRegA_11x();
- DCHECK_LT(return_reg, code_item->registers_size_);
-
- uint32_t vA, vB, dummy;
- uint64_t dummy_wide;
- instruction->Decode(vA, vB, dummy_wide, dummy, nullptr);
- if (instruction->Opcode() == Instruction::CONST_HIGH16) {
- vB <<= 16;
- }
- DCHECK_LT(vA, code_item->registers_size_);
- if (vA != return_reg) {
- return false; // Not returning the value set by const?
- }
- if (return_opcode == Instruction::RETURN_OBJECT && vB != 0) {
- return false; // Returning non-null reference constant?
- }
- result->opcode = kInlineOpNonWideConst;
- result->flags = kInlineSpecial;
- result->d.data = static_cast<uint64_t>(vB);
- return true;
-}
-
-bool DexFileMethodInliner::AnalyseIGetMethod(verifier::MethodVerifier* verifier,
- InlineMethod* result) {
- const DexFile::CodeItem* code_item = verifier->CodeItem();
- const Instruction* instruction = Instruction::At(code_item->insns_);
- Instruction::Code opcode = instruction->Opcode();
- DCHECK_LT(static_cast<size_t>(opcode - Instruction::IGET), arraysize(kIGetIPutOpSizes));
- uint16_t size = kIGetIPutOpSizes[opcode - Instruction::IGET];
-
- const Instruction* return_instruction = instruction->Next();
- Instruction::Code return_opcode = return_instruction->Opcode();
- if (!(return_opcode == Instruction::RETURN && size != kLong) &&
- !(return_opcode == Instruction::RETURN_WIDE && size == kLong) &&
- !(return_opcode == Instruction::RETURN_OBJECT && opcode == Instruction::IGET_OBJECT)) {
- return false;
- }
-
- uint32_t return_reg = return_instruction->VRegA_11x();
- DCHECK_LT(return_opcode == Instruction::RETURN_WIDE ? return_reg + 1 : return_reg,
- code_item->registers_size_);
-
- uint32_t dst_reg = instruction->VRegA_22c();
- uint32_t object_reg = instruction->VRegB_22c();
- uint32_t field_idx = instruction->VRegC_22c();
- uint32_t arg_start = code_item->registers_size_ - code_item->ins_size_;
- DCHECK_GE(object_reg, arg_start);
- DCHECK_LT(object_reg, code_item->registers_size_);
- DCHECK_LT(size == kLong ? dst_reg + 1 : dst_reg, code_item->registers_size_);
- if (dst_reg != return_reg) {
- return false; // Not returning the value retrieved by IGET?
- }
-
- if ((verifier->GetAccessFlags() & kAccStatic) != 0 || object_reg != arg_start) {
- // TODO: Support inlining IGET on other register than "this".
- return false;
- }
-
- if (!CompilerDriver::ComputeSpecialAccessorInfo(field_idx, false, verifier,
- &result->d.ifield_data)) {
- return false;
- }
-
- result->opcode = kInlineOpIGet;
- result->flags = kInlineSpecial;
- InlineIGetIPutData* data = &result->d.ifield_data;
- data->op_size = size;
- data->is_object = (opcode == Instruction::IGET_OBJECT) ? 1u : 0u;
- data->object_arg = object_reg - arg_start; // Allow IGET on any register, not just "this".
- data->src_arg = 0;
- data->method_is_static = (verifier->GetAccessFlags() & kAccStatic) != 0;
- data->reserved = 0;
- return true;
-}
-
-bool DexFileMethodInliner::AnalyseIPutMethod(verifier::MethodVerifier* verifier,
- InlineMethod* result) {
- const DexFile::CodeItem* code_item = verifier->CodeItem();
- const Instruction* instruction = Instruction::At(code_item->insns_);
- Instruction::Code opcode = instruction->Opcode();
- DCHECK_LT(static_cast<size_t>(opcode - Instruction::IPUT), arraysize(kIGetIPutOpSizes));
- uint16_t size = kIGetIPutOpSizes[opcode - Instruction::IPUT];
-
- const Instruction* return_instruction = instruction->Next();
- if (return_instruction->Opcode() != Instruction::RETURN_VOID) {
- // TODO: Support returning an argument.
- // This is needed by builder classes and generated accessor setters.
- // builder.setX(value): iput value, this, fieldX; return-object this;
- // object.access$nnn(value): iput value, this, fieldX; return value;
- // Use InlineIGetIPutData::reserved to hold the information.
- return false;
- }
-
- uint32_t src_reg = instruction->VRegA_22c();
- uint32_t object_reg = instruction->VRegB_22c();
- uint32_t field_idx = instruction->VRegC_22c();
- uint32_t arg_start = code_item->registers_size_ - code_item->ins_size_;
- DCHECK_GE(object_reg, arg_start);
- DCHECK_LT(object_reg, code_item->registers_size_);
- DCHECK_GE(src_reg, arg_start);
- DCHECK_LT(size == kLong ? src_reg + 1 : src_reg, code_item->registers_size_);
-
- if ((verifier->GetAccessFlags() & kAccStatic) != 0 || object_reg != arg_start) {
- // TODO: Support inlining IPUT on other register than "this".
- return false;
- }
-
- if (!CompilerDriver::ComputeSpecialAccessorInfo(field_idx, true, verifier,
- &result->d.ifield_data)) {
- return false;
- }
-
- result->opcode = kInlineOpIPut;
- result->flags = kInlineSpecial;
- InlineIGetIPutData* data = &result->d.ifield_data;
- data->op_size = size;
- data->is_object = (opcode == Instruction::IPUT_OBJECT) ? 1u : 0u;
- data->object_arg = object_reg - arg_start; // Allow IPUT on any register, not just "this".
- data->src_arg = src_reg - arg_start;
- data->method_is_static = (verifier->GetAccessFlags() & kAccStatic) != 0;
- data->reserved = 0;
- return true;
-}
-
} // namespace art
#include "safe_map.h"
#include "dex/compiler_enums.h"
#include "dex_file.h"
+#include "quick/inline_method_analyser.h"
namespace art {
struct CallInfo;
class Mir2Lir;
-enum InlineMethodOpcode : uint16_t {
- kIntrinsicDoubleCvt,
- kIntrinsicFloatCvt,
- kIntrinsicReverseBytes,
- kIntrinsicAbsInt,
- kIntrinsicAbsLong,
- kIntrinsicAbsFloat,
- kIntrinsicAbsDouble,
- kIntrinsicMinMaxInt,
- kIntrinsicSqrt,
- kIntrinsicCharAt,
- kIntrinsicCompareTo,
- kIntrinsicIsEmptyOrLength,
- kIntrinsicIndexOf,
- kIntrinsicCurrentThread,
- kIntrinsicPeek,
- kIntrinsicPoke,
- kIntrinsicCas,
- kIntrinsicUnsafeGet,
- kIntrinsicUnsafePut,
-
- kInlineOpNop,
- kInlineOpReturnArg,
- kInlineOpNonWideConst,
- kInlineOpIGet,
- kInlineOpIPut,
-};
-std::ostream& operator<<(std::ostream& os, const InlineMethodOpcode& rhs);
-
-enum InlineMethodFlags : uint16_t {
- kNoInlineMethodFlags = 0x0000,
- kInlineIntrinsic = 0x0001,
- kInlineSpecial = 0x0002,
-};
-
-// IntrinsicFlags are stored in InlineMethod::d::raw_data
-enum IntrinsicFlags {
- kIntrinsicFlagNone = 0,
-
- // kIntrinsicMinMaxInt
- kIntrinsicFlagMax = kIntrinsicFlagNone,
- kIntrinsicFlagMin = 1,
-
- // kIntrinsicIsEmptyOrLength
- kIntrinsicFlagLength = kIntrinsicFlagNone,
- kIntrinsicFlagIsEmpty = kIntrinsicFlagMin,
-
- // kIntrinsicIndexOf
- kIntrinsicFlagBase0 = kIntrinsicFlagMin,
-
- // kIntrinsicUnsafeGet, kIntrinsicUnsafePut, kIntrinsicUnsafeCas
- kIntrinsicFlagIsLong = kIntrinsicFlagMin,
- // kIntrinsicUnsafeGet, kIntrinsicUnsafePut
- kIntrinsicFlagIsVolatile = 2,
- // kIntrinsicUnsafePut, kIntrinsicUnsafeCas
- kIntrinsicFlagIsObject = 4,
- // kIntrinsicUnsafePut
- kIntrinsicFlagIsOrdered = 8,
-};
-
-// Check that OpSize fits into 3 bits (at least the values the inliner uses).
-COMPILE_ASSERT(kWord < 8 && kLong < 8 && kSingle < 8 && kDouble < 8 && kUnsignedHalf < 8 &&
- kSignedHalf < 8 && kUnsignedByte < 8 && kSignedByte < 8, op_size_field_too_narrow);
-
-struct InlineIGetIPutData {
- uint16_t op_size : 3; // OpSize
- uint16_t is_object : 1;
- uint16_t object_arg : 4;
- uint16_t src_arg : 4; // iput only
- uint16_t method_is_static : 1;
- uint16_t reserved : 3;
- uint16_t field_idx;
- uint32_t is_volatile : 1;
- uint32_t field_offset : 31;
-};
-COMPILE_ASSERT(sizeof(InlineIGetIPutData) == sizeof(uint64_t), InvalidSizeOfInlineIGetIPutData);
-
-struct InlineReturnArgData {
- uint16_t arg;
- uint16_t op_size : 3; // OpSize
- uint16_t is_object : 1;
- uint16_t reserved : 12;
- uint32_t reserved2;
-};
-COMPILE_ASSERT(sizeof(InlineReturnArgData) == sizeof(uint64_t), InvalidSizeOfInlineReturnArgData);
-
-struct InlineMethod {
- InlineMethodOpcode opcode;
- InlineMethodFlags flags;
- union {
- uint64_t data;
- InlineIGetIPutData ifield_data;
- InlineReturnArgData return_data;
- } d;
-};
-
/**
* Handles inlining of methods from a particular DexFile.
*
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) LOCKS_EXCLUDED(lock_);
/**
- * Analyse method code to determine if the method is a candidate for inlining.
- * If it is, record the inlining data.
- *
- * @param verifier the method verifier holding data about the method to analyse.
- * @param method placeholder for the inline method data.
- * @return true if the method is a candidate for inlining, false otherwise.
- */
- bool AnalyseMethodCode(verifier::MethodVerifier* verifier, InlineMethod* method)
- SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) LOCKS_EXCLUDED(lock_);
-
- /**
* Check whether a particular method index corresponds to an intrinsic function.
*/
bool IsIntrinsic(uint32_t method_index) LOCKS_EXCLUDED(lock_);
bool AddInlineMethod(int32_t method_idx, const InlineMethod& method) LOCKS_EXCLUDED(lock_);
- static bool AnalyseReturnMethod(const DexFile::CodeItem* code_item, InlineMethod* result);
- static bool AnalyseConstMethod(const DexFile::CodeItem* code_item, InlineMethod* result);
- static bool AnalyseIGetMethod(verifier::MethodVerifier* verifier, InlineMethod* result)
- SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
- static bool AnalyseIPutMethod(verifier::MethodVerifier* verifier, InlineMethod* result)
- SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
-
ReaderWriterMutex lock_;
/*
* Maps method indexes (for the particular DexFile) to Intrinsic defintions.
return false;
}
- DCHECK_NE(data.op_size, kDouble); // The inliner doesn't distinguish kDouble, uses kLong.
- bool wide = (data.op_size == kLong);
+ bool wide = (data.op_variant == InlineMethodAnalyser::IGetVariant(Instruction::IGET_WIDE));
+ // The inliner doesn't distinguish kDouble or kFloat, use shorty.
bool double_or_float = cu_->shorty[0] == 'F' || cu_->shorty[0] == 'D';
// Point of no return - no aborts after this
return false;
}
- DCHECK_NE(data.op_size, kDouble); // The inliner doesn't distinguish kDouble, uses kLong.
- bool wide = (data.op_size == kLong);
+ bool wide = (data.op_variant == InlineMethodAnalyser::IPutVariant(Instruction::IPUT_WIDE));
// Point of no return - no aborts after this
GenPrintLabel(mir);
if (data.is_volatile) {
GenMemBarrier(kLoadLoad);
}
- if (data.is_object) {
+ if (data.op_variant == InlineMethodAnalyser::IPutVariant(Instruction::IPUT_OBJECT)) {
MarkGCCard(reg_src, reg_obj);
}
return true;
bool Mir2Lir::GenSpecialIdentity(MIR* mir, const InlineMethod& special) {
const InlineReturnArgData& data = special.d.return_data;
- DCHECK_NE(data.op_size, kDouble); // The inliner doesn't distinguish kDouble, uses kLong.
- bool wide = (data.op_size == kLong);
+ bool wide = (data.is_wide != 0u);
+ // The inliner doesn't distinguish kDouble or kFloat, use shorty.
bool double_or_float = cu_->shorty[0] == 'F' || cu_->shorty[0] == 'D';
// Point of no return - no aborts after this
stats_->ProcessedInvoke(invoke_type, flags);
}
-bool CompilerDriver::ComputeSpecialAccessorInfo(uint32_t field_idx, bool is_put,
- verifier::MethodVerifier* verifier,
- InlineIGetIPutData* result) {
- mirror::DexCache* dex_cache = verifier->GetDexCache();
- uint32_t method_idx = verifier->GetMethodReference().dex_method_index;
- mirror::ArtMethod* method = dex_cache->GetResolvedMethod(method_idx);
- mirror::ArtField* field = dex_cache->GetResolvedField(field_idx);
- if (method == nullptr || field == nullptr || field->IsStatic()) {
- return false;
- }
- mirror::Class* method_class = method->GetDeclaringClass();
- mirror::Class* field_class = field->GetDeclaringClass();
- if (!method_class->CanAccessResolvedField(field_class, field, dex_cache, field_idx) ||
- (is_put && field->IsFinal() && method_class != field_class)) {
- return false;
- }
- DCHECK_GE(field->GetOffset().Int32Value(), 0);
- result->field_idx = field_idx;
- result->field_offset = field->GetOffset().Int32Value();
- result->is_volatile = field->IsVolatile();
- return true;
-}
-
bool CompilerDriver::ComputeInstanceFieldInfo(uint32_t field_idx, const DexCompilationUnit* mUnit,
bool is_put, MemberOffset* field_offset,
bool* is_volatile) {
void ProcessedStaticField(bool resolved, bool local);
void ProcessedInvoke(InvokeType invoke_type, int flags);
- // Can we fast path instance field access in a verified accessor?
- // If yes, computes field's offset and volatility and whether the method is static or not.
- static bool ComputeSpecialAccessorInfo(uint32_t field_idx, bool is_put,
- verifier::MethodVerifier* verifier,
- InlineIGetIPutData* result)
- SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
-
// Can we fast path instance field access? Computes field's offset and volatility.
bool ComputeInstanceFieldInfo(uint32_t field_idx, const DexCompilationUnit* mUnit, bool is_put,
MemberOffset* field_offset, bool* is_volatile)
os_linux.cc \
parsed_options.cc \
primitive.cc \
+ quick/inline_method_analyser.cc \
reference_table.cc \
reflection.cc \
runtime.cc \
lock_word.h \
mirror/class.h \
oat.h \
+ quick/inline_method_analyser.h \
thread.h \
thread_state.h \
verifier/method_verifier.h
--- /dev/null
+/*
+ * Copyright (C) 2014 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.
+ */
+
+#include "inline_method_analyser.h"
+#include "dex_instruction.h"
+#include "dex_instruction-inl.h"
+#include "mirror/art_field.h"
+#include "mirror/art_field-inl.h"
+#include "mirror/art_method.h"
+#include "mirror/art_method-inl.h"
+#include "mirror/class.h"
+#include "mirror/class-inl.h"
+#include "mirror/dex_cache.h"
+#include "mirror/dex_cache-inl.h"
+#include "verifier/method_verifier.h"
+#include "verifier/method_verifier-inl.h"
+
+/*
+ * NOTE: This code is part of the quick compiler. It lives in the runtime
+ * only to allow the debugger to check whether a method has been inlined.
+ */
+
+namespace art {
+
+COMPILE_ASSERT(InlineMethodAnalyser::IsInstructionIGet(Instruction::IGET),
+ check_iget_type);
+COMPILE_ASSERT(InlineMethodAnalyser::IsInstructionIGet(Instruction::IGET_WIDE),
+ check_iget_wide_type);
+COMPILE_ASSERT(InlineMethodAnalyser::IsInstructionIGet(Instruction::IGET_OBJECT),
+ check_iget_object_type);
+COMPILE_ASSERT(InlineMethodAnalyser::IsInstructionIGet(Instruction::IGET_BOOLEAN),
+ check_iget_boolean_type);
+COMPILE_ASSERT(InlineMethodAnalyser::IsInstructionIGet(Instruction::IGET_BYTE),
+ check_iget_byte_type);
+COMPILE_ASSERT(InlineMethodAnalyser::IsInstructionIGet(Instruction::IGET_CHAR),
+ check_iget_char_type);
+COMPILE_ASSERT(InlineMethodAnalyser::IsInstructionIGet(Instruction::IGET_SHORT),
+ check_iget_short_type);
+
+COMPILE_ASSERT(InlineMethodAnalyser::IsInstructionIPut(Instruction::IPUT),
+ check_iput_type);
+COMPILE_ASSERT(InlineMethodAnalyser::IsInstructionIPut(Instruction::IPUT_WIDE),
+ check_iput_wide_type);
+COMPILE_ASSERT(InlineMethodAnalyser::IsInstructionIPut(Instruction::IPUT_OBJECT),
+ check_iput_object_type);
+COMPILE_ASSERT(InlineMethodAnalyser::IsInstructionIPut(Instruction::IPUT_BOOLEAN),
+ check_iput_boolean_type);
+COMPILE_ASSERT(InlineMethodAnalyser::IsInstructionIPut(Instruction::IPUT_BYTE),
+ check_iput_byte_type);
+COMPILE_ASSERT(InlineMethodAnalyser::IsInstructionIPut(Instruction::IPUT_CHAR),
+ check_iput_char_type);
+COMPILE_ASSERT(InlineMethodAnalyser::IsInstructionIPut(Instruction::IPUT_SHORT),
+ check_iput_short_type);
+
+COMPILE_ASSERT(InlineMethodAnalyser::IGetVariant(Instruction::IGET) ==
+ InlineMethodAnalyser::IPutVariant(Instruction::IPUT), check_iget_iput_variant);
+COMPILE_ASSERT(InlineMethodAnalyser::IGetVariant(Instruction::IGET_WIDE) ==
+ InlineMethodAnalyser::IPutVariant(Instruction::IPUT_WIDE), check_iget_iput_wide_variant);
+COMPILE_ASSERT(InlineMethodAnalyser::IGetVariant(Instruction::IGET_OBJECT) ==
+ InlineMethodAnalyser::IPutVariant(Instruction::IPUT_OBJECT), check_iget_iput_object_variant);
+COMPILE_ASSERT(InlineMethodAnalyser::IGetVariant(Instruction::IGET_BOOLEAN) ==
+ InlineMethodAnalyser::IPutVariant(Instruction::IPUT_BOOLEAN), check_iget_iput_boolean_variant);
+COMPILE_ASSERT(InlineMethodAnalyser::IGetVariant(Instruction::IGET_BYTE) ==
+ InlineMethodAnalyser::IPutVariant(Instruction::IPUT_BYTE), check_iget_iput_byte_variant);
+COMPILE_ASSERT(InlineMethodAnalyser::IGetVariant(Instruction::IGET_CHAR) ==
+ InlineMethodAnalyser::IPutVariant(Instruction::IPUT_CHAR), check_iget_iput_char_variant);
+COMPILE_ASSERT(InlineMethodAnalyser::IGetVariant(Instruction::IGET_SHORT) ==
+ InlineMethodAnalyser::IPutVariant(Instruction::IPUT_SHORT), check_iget_iput_short_variant);
+
+bool InlineMethodAnalyser::AnalyseMethodCode(verifier::MethodVerifier* verifier,
+ InlineMethod* method) {
+ // We currently support only plain return or 2-instruction methods.
+
+ const DexFile::CodeItem* code_item = verifier->CodeItem();
+ DCHECK_NE(code_item->insns_size_in_code_units_, 0u);
+ const Instruction* instruction = Instruction::At(code_item->insns_);
+ Instruction::Code opcode = instruction->Opcode();
+
+ switch (opcode) {
+ case Instruction::RETURN_VOID:
+ method->opcode = kInlineOpNop;
+ method->flags = kInlineSpecial;
+ method->d.data = 0u;
+ return true;
+ case Instruction::RETURN:
+ case Instruction::RETURN_OBJECT:
+ case Instruction::RETURN_WIDE:
+ return AnalyseReturnMethod(code_item, method);
+ case Instruction::CONST:
+ case Instruction::CONST_4:
+ case Instruction::CONST_16:
+ case Instruction::CONST_HIGH16:
+ // TODO: Support wide constants (RETURN_WIDE).
+ return AnalyseConstMethod(code_item, method);
+ case Instruction::IGET:
+ case Instruction::IGET_OBJECT:
+ case Instruction::IGET_BOOLEAN:
+ case Instruction::IGET_BYTE:
+ case Instruction::IGET_CHAR:
+ case Instruction::IGET_SHORT:
+ case Instruction::IGET_WIDE:
+ return AnalyseIGetMethod(verifier, method);
+ case Instruction::IPUT:
+ case Instruction::IPUT_OBJECT:
+ case Instruction::IPUT_BOOLEAN:
+ case Instruction::IPUT_BYTE:
+ case Instruction::IPUT_CHAR:
+ case Instruction::IPUT_SHORT:
+ case Instruction::IPUT_WIDE:
+ return AnalyseIPutMethod(verifier, method);
+ default:
+ return false;
+ }
+}
+
+bool InlineMethodAnalyser::AnalyseReturnMethod(const DexFile::CodeItem* code_item,
+ InlineMethod* result) {
+ const Instruction* return_instruction = Instruction::At(code_item->insns_);
+ Instruction::Code return_opcode = return_instruction->Opcode();
+ uint32_t reg = return_instruction->VRegA_11x();
+ uint32_t arg_start = code_item->registers_size_ - code_item->ins_size_;
+ DCHECK_GE(reg, arg_start);
+ DCHECK_LT((return_opcode == Instruction::RETURN_WIDE) ? reg + 1 : reg,
+ code_item->registers_size_);
+
+ result->opcode = kInlineOpReturnArg;
+ result->flags = kInlineSpecial;
+ InlineReturnArgData* data = &result->d.return_data;
+ data->arg = reg - arg_start;
+ data->is_wide = (return_opcode == Instruction::RETURN_WIDE) ? 1u : 0u;
+ data->is_object = (return_opcode == Instruction::RETURN_OBJECT) ? 1u : 0u;
+ data->reserved = 0u;
+ data->reserved2 = 0u;
+ return true;
+}
+
+bool InlineMethodAnalyser::AnalyseConstMethod(const DexFile::CodeItem* code_item,
+ InlineMethod* result) {
+ const Instruction* instruction = Instruction::At(code_item->insns_);
+ const Instruction* return_instruction = instruction->Next();
+ Instruction::Code return_opcode = return_instruction->Opcode();
+ if (return_opcode != Instruction::RETURN &&
+ return_opcode != Instruction::RETURN_OBJECT) {
+ return false;
+ }
+
+ uint32_t return_reg = return_instruction->VRegA_11x();
+ DCHECK_LT(return_reg, code_item->registers_size_);
+
+ uint32_t vA, vB, dummy;
+ uint64_t dummy_wide;
+ instruction->Decode(vA, vB, dummy_wide, dummy, nullptr);
+ if (instruction->Opcode() == Instruction::CONST_HIGH16) {
+ vB <<= 16;
+ }
+ DCHECK_LT(vA, code_item->registers_size_);
+ if (vA != return_reg) {
+ return false; // Not returning the value set by const?
+ }
+ if (return_opcode == Instruction::RETURN_OBJECT && vB != 0) {
+ return false; // Returning non-null reference constant?
+ }
+ result->opcode = kInlineOpNonWideConst;
+ result->flags = kInlineSpecial;
+ result->d.data = static_cast<uint64_t>(vB);
+ return true;
+}
+
+bool InlineMethodAnalyser::AnalyseIGetMethod(verifier::MethodVerifier* verifier,
+ InlineMethod* result) {
+ const DexFile::CodeItem* code_item = verifier->CodeItem();
+ const Instruction* instruction = Instruction::At(code_item->insns_);
+ Instruction::Code opcode = instruction->Opcode();
+ DCHECK(IsInstructionIGet(opcode));
+
+ const Instruction* return_instruction = instruction->Next();
+ Instruction::Code return_opcode = return_instruction->Opcode();
+ if (!(return_opcode == Instruction::RETURN_WIDE && opcode == Instruction::IGET_WIDE) &&
+ !(return_opcode == Instruction::RETURN_OBJECT && opcode == Instruction::IGET_OBJECT) &&
+ !(return_opcode == Instruction::RETURN && opcode != Instruction::IGET_WIDE &&
+ opcode != Instruction::IGET_OBJECT)) {
+ return false;
+ }
+
+ uint32_t return_reg = return_instruction->VRegA_11x();
+ DCHECK_LT(return_opcode == Instruction::RETURN_WIDE ? return_reg + 1 : return_reg,
+ code_item->registers_size_);
+
+ uint32_t dst_reg = instruction->VRegA_22c();
+ uint32_t object_reg = instruction->VRegB_22c();
+ uint32_t field_idx = instruction->VRegC_22c();
+ uint32_t arg_start = code_item->registers_size_ - code_item->ins_size_;
+ DCHECK_GE(object_reg, arg_start);
+ DCHECK_LT(object_reg, code_item->registers_size_);
+ DCHECK_LT(opcode == Instruction::IGET_WIDE ? dst_reg + 1 : dst_reg, code_item->registers_size_);
+ if (dst_reg != return_reg) {
+ return false; // Not returning the value retrieved by IGET?
+ }
+
+ if ((verifier->GetAccessFlags() & kAccStatic) != 0 || object_reg != arg_start) {
+ // TODO: Support inlining IGET on other register than "this".
+ return false;
+ }
+
+ if (!ComputeSpecialAccessorInfo(field_idx, false, verifier, &result->d.ifield_data)) {
+ return false;
+ }
+
+ result->opcode = kInlineOpIGet;
+ result->flags = kInlineSpecial;
+ InlineIGetIPutData* data = &result->d.ifield_data;
+ data->op_variant = IGetVariant(opcode);
+ data->object_arg = object_reg - arg_start; // Allow IGET on any register, not just "this".
+ data->src_arg = 0;
+ data->method_is_static = (verifier->GetAccessFlags() & kAccStatic) != 0;
+ data->reserved = 0;
+ return true;
+}
+
+bool InlineMethodAnalyser::AnalyseIPutMethod(verifier::MethodVerifier* verifier,
+ InlineMethod* result) {
+ const DexFile::CodeItem* code_item = verifier->CodeItem();
+ const Instruction* instruction = Instruction::At(code_item->insns_);
+ Instruction::Code opcode = instruction->Opcode();
+ DCHECK(IsInstructionIPut(opcode));
+
+ const Instruction* return_instruction = instruction->Next();
+ Instruction::Code return_opcode = return_instruction->Opcode();
+ if (return_opcode != Instruction::RETURN_VOID) {
+ // TODO: Support returning an argument.
+ // This is needed by builder classes and generated accessor setters.
+ // builder.setX(value): iput value, this, fieldX; return-object this;
+ // object.access$nnn(value): iput value, this, fieldX; return value;
+ // Use InlineIGetIPutData::reserved to hold the information.
+ return false;
+ }
+
+ uint32_t src_reg = instruction->VRegA_22c();
+ uint32_t object_reg = instruction->VRegB_22c();
+ uint32_t field_idx = instruction->VRegC_22c();
+ uint32_t arg_start = code_item->registers_size_ - code_item->ins_size_;
+ DCHECK_GE(object_reg, arg_start);
+ DCHECK_LT(object_reg, code_item->registers_size_);
+ DCHECK_GE(src_reg, arg_start);
+ DCHECK_LT(opcode == Instruction::IPUT_WIDE ? src_reg + 1 : src_reg, code_item->registers_size_);
+
+ if ((verifier->GetAccessFlags() & kAccStatic) != 0 || object_reg != arg_start) {
+ // TODO: Support inlining IPUT on other register than "this".
+ return false;
+ }
+
+ if (!ComputeSpecialAccessorInfo(field_idx, true, verifier, &result->d.ifield_data)) {
+ return false;
+ }
+
+ result->opcode = kInlineOpIPut;
+ result->flags = kInlineSpecial;
+ InlineIGetIPutData* data = &result->d.ifield_data;
+ data->op_variant = IPutVariant(opcode);
+ data->object_arg = object_reg - arg_start; // Allow IPUT on any register, not just "this".
+ data->src_arg = src_reg - arg_start;
+ data->method_is_static = (verifier->GetAccessFlags() & kAccStatic) != 0;
+ data->reserved = 0;
+ return true;
+}
+
+bool InlineMethodAnalyser::ComputeSpecialAccessorInfo(uint32_t field_idx, bool is_put,
+ verifier::MethodVerifier* verifier,
+ InlineIGetIPutData* result) {
+ mirror::DexCache* dex_cache = verifier->GetDexCache();
+ uint32_t method_idx = verifier->GetMethodReference().dex_method_index;
+ mirror::ArtMethod* method = dex_cache->GetResolvedMethod(method_idx);
+ mirror::ArtField* field = dex_cache->GetResolvedField(field_idx);
+ if (method == nullptr || field == nullptr || field->IsStatic()) {
+ return false;
+ }
+ mirror::Class* method_class = method->GetDeclaringClass();
+ mirror::Class* field_class = field->GetDeclaringClass();
+ if (!method_class->CanAccessResolvedField(field_class, field, dex_cache, field_idx) ||
+ (is_put && field->IsFinal() && method_class != field_class)) {
+ return false;
+ }
+ DCHECK_GE(field->GetOffset().Int32Value(), 0);
+ result->field_idx = field_idx;
+ result->field_offset = field->GetOffset().Int32Value();
+ result->is_volatile = field->IsVolatile();
+ return true;
+}
+
+} // namespace art
--- /dev/null
+/*
+ * Copyright (C) 2014 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_RUNTIME_QUICK_INLINE_METHOD_ANALYSER_H_
+#define ART_RUNTIME_QUICK_INLINE_METHOD_ANALYSER_H_
+
+#include "base/macros.h"
+#include "base/mutex.h"
+#include "dex_file.h"
+#include "dex_instruction.h"
+
+/*
+ * NOTE: This code is part of the quick compiler. It lives in the runtime
+ * only to allow the debugger to check whether a method has been inlined.
+ */
+
+namespace art {
+
+namespace verifier {
+class MethodVerifier;
+} // namespace verifier
+
+enum InlineMethodOpcode : uint16_t {
+ kIntrinsicDoubleCvt,
+ kIntrinsicFloatCvt,
+ kIntrinsicReverseBytes,
+ kIntrinsicAbsInt,
+ kIntrinsicAbsLong,
+ kIntrinsicAbsFloat,
+ kIntrinsicAbsDouble,
+ kIntrinsicMinMaxInt,
+ kIntrinsicSqrt,
+ kIntrinsicCharAt,
+ kIntrinsicCompareTo,
+ kIntrinsicIsEmptyOrLength,
+ kIntrinsicIndexOf,
+ kIntrinsicCurrentThread,
+ kIntrinsicPeek,
+ kIntrinsicPoke,
+ kIntrinsicCas,
+ kIntrinsicUnsafeGet,
+ kIntrinsicUnsafePut,
+
+ kInlineOpNop,
+ kInlineOpReturnArg,
+ kInlineOpNonWideConst,
+ kInlineOpIGet,
+ kInlineOpIPut,
+};
+std::ostream& operator<<(std::ostream& os, const InlineMethodOpcode& rhs);
+
+enum InlineMethodFlags : uint16_t {
+ kNoInlineMethodFlags = 0x0000,
+ kInlineIntrinsic = 0x0001,
+ kInlineSpecial = 0x0002,
+};
+
+// IntrinsicFlags are stored in InlineMethod::d::raw_data
+enum IntrinsicFlags {
+ kIntrinsicFlagNone = 0,
+
+ // kIntrinsicMinMaxInt
+ kIntrinsicFlagMax = kIntrinsicFlagNone,
+ kIntrinsicFlagMin = 1,
+
+ // kIntrinsicIsEmptyOrLength
+ kIntrinsicFlagLength = kIntrinsicFlagNone,
+ kIntrinsicFlagIsEmpty = kIntrinsicFlagMin,
+
+ // kIntrinsicIndexOf
+ kIntrinsicFlagBase0 = kIntrinsicFlagMin,
+
+ // kIntrinsicUnsafeGet, kIntrinsicUnsafePut, kIntrinsicUnsafeCas
+ kIntrinsicFlagIsLong = kIntrinsicFlagMin,
+ // kIntrinsicUnsafeGet, kIntrinsicUnsafePut
+ kIntrinsicFlagIsVolatile = 2,
+ // kIntrinsicUnsafePut, kIntrinsicUnsafeCas
+ kIntrinsicFlagIsObject = 4,
+ // kIntrinsicUnsafePut
+ kIntrinsicFlagIsOrdered = 8,
+};
+
+struct InlineIGetIPutData {
+ // The op_variant below is opcode-Instruction::IGET for IGETs and
+ // opcode-Instruction::IPUT for IPUTs. This is because the runtime
+ // doesn't know the OpSize enumeration.
+ uint16_t op_variant : 3;
+ uint16_t object_arg : 4;
+ uint16_t src_arg : 4; // iput only
+ uint16_t method_is_static : 1;
+ uint16_t reserved : 4;
+ uint16_t field_idx;
+ uint32_t is_volatile : 1;
+ uint32_t field_offset : 31;
+};
+COMPILE_ASSERT(sizeof(InlineIGetIPutData) == sizeof(uint64_t), InvalidSizeOfInlineIGetIPutData);
+
+struct InlineReturnArgData {
+ uint16_t arg;
+ uint16_t is_wide : 1;
+ uint16_t is_object : 1;
+ uint16_t reserved : 14;
+ uint32_t reserved2;
+};
+COMPILE_ASSERT(sizeof(InlineReturnArgData) == sizeof(uint64_t), InvalidSizeOfInlineReturnArgData);
+
+struct InlineMethod {
+ InlineMethodOpcode opcode;
+ InlineMethodFlags flags;
+ union {
+ uint64_t data;
+ InlineIGetIPutData ifield_data;
+ InlineReturnArgData return_data;
+ } d;
+};
+
+class InlineMethodAnalyser {
+ public:
+ /**
+ * Analyse method code to determine if the method is a candidate for inlining.
+ * If it is, record the inlining data.
+ *
+ * @param verifier the method verifier holding data about the method to analyse.
+ * @param method placeholder for the inline method data.
+ * @return true if the method is a candidate for inlining, false otherwise.
+ */
+ static bool AnalyseMethodCode(verifier::MethodVerifier* verifier, InlineMethod* method)
+ SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
+
+ static constexpr bool IsInstructionIGet(Instruction::Code opcode) {
+ return Instruction::IGET <= opcode && opcode <= Instruction::IGET_SHORT;
+ }
+
+ static constexpr bool IsInstructionIPut(Instruction::Code opcode) {
+ return Instruction::IPUT <= opcode && opcode <= Instruction::IPUT_SHORT;
+ }
+
+ static constexpr uint16_t IGetVariant(Instruction::Code opcode) {
+ return opcode - Instruction::IGET;
+ }
+
+ static constexpr uint16_t IPutVariant(Instruction::Code opcode) {
+ return opcode - Instruction::IPUT;
+ }
+
+ private:
+ static bool AnalyseReturnMethod(const DexFile::CodeItem* code_item, InlineMethod* result);
+ static bool AnalyseConstMethod(const DexFile::CodeItem* code_item, InlineMethod* result);
+ static bool AnalyseIGetMethod(verifier::MethodVerifier* verifier, InlineMethod* result)
+ SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
+ static bool AnalyseIPutMethod(verifier::MethodVerifier* verifier, InlineMethod* result)
+ SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
+
+ // Can we fast path instance field access in a verified accessor?
+ // If yes, computes field's offset and volatility and whether the method is static or not.
+ static bool ComputeSpecialAccessorInfo(uint32_t field_idx, bool is_put,
+ verifier::MethodVerifier* verifier,
+ InlineIGetIPutData* result)
+ SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
+};
+
+} // namespace art
+
+#endif // ART_RUNTIME_QUICK_INLINE_METHOD_ANALYSER_H_
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