// Copyright 2015 the V8 project authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. #ifndef V8_COMPILER_CODE_STUB_ASSEMBLER_H_ #define V8_COMPILER_CODE_STUB_ASSEMBLER_H_ #include // Clients of this interface shouldn't depend on lots of compiler internals. // Do not include anything from src/compiler here! #include "src/allocation.h" #include "src/builtins.h" #include "src/heap/heap.h" #include "src/machine-type.h" #include "src/runtime/runtime.h" #include "src/zone-containers.h" namespace v8 { namespace internal { class Callable; class CallInterfaceDescriptor; class Isolate; class Factory; class Zone; namespace compiler { class CallDescriptor; class Graph; class Node; class Operator; class RawMachineAssembler; class RawMachineLabel; class Schedule; #define CODE_STUB_ASSEMBLER_COMPARE_BINARY_OP_LIST(V) \ V(Float32Equal) \ V(Float32LessThan) \ V(Float32LessThanOrEqual) \ V(Float32GreaterThan) \ V(Float32GreaterThanOrEqual) \ V(Float64Equal) \ V(Float64LessThan) \ V(Float64LessThanOrEqual) \ V(Float64GreaterThan) \ V(Float64GreaterThanOrEqual) \ V(Int32GreaterThan) \ V(Int32GreaterThanOrEqual) \ V(Int32LessThan) \ V(Int32LessThanOrEqual) \ V(IntPtrLessThan) \ V(IntPtrLessThanOrEqual) \ V(Uint32LessThan) \ V(UintPtrGreaterThanOrEqual) \ V(WordEqual) \ V(WordNotEqual) \ V(Word32Equal) \ V(Word32NotEqual) \ V(Word64Equal) \ V(Word64NotEqual) #define CODE_STUB_ASSEMBLER_BINARY_OP_LIST(V) \ CODE_STUB_ASSEMBLER_COMPARE_BINARY_OP_LIST(V) \ V(Float64Add) \ V(Float64Sub) \ V(Float64InsertLowWord32) \ V(Float64InsertHighWord32) \ V(IntPtrAdd) \ V(IntPtrAddWithOverflow) \ V(IntPtrSub) \ V(IntPtrSubWithOverflow) \ V(Int32Add) \ V(Int32AddWithOverflow) \ V(Int32Sub) \ V(Int32Mul) \ V(WordOr) \ V(WordAnd) \ V(WordXor) \ V(WordShl) \ V(WordShr) \ V(WordSar) \ V(WordRor) \ V(Word32Or) \ V(Word32And) \ V(Word32Xor) \ V(Word32Shl) \ V(Word32Shr) \ V(Word32Sar) \ V(Word32Ror) \ V(Word64Or) \ V(Word64And) \ V(Word64Xor) \ V(Word64Shr) \ V(Word64Sar) \ V(Word64Ror) #define CODE_STUB_ASSEMBLER_UNARY_OP_LIST(V) \ V(Float64Neg) \ V(Float64Sqrt) \ V(ChangeFloat64ToUint32) \ V(ChangeInt32ToFloat64) \ V(ChangeInt32ToInt64) \ V(ChangeUint32ToFloat64) \ V(ChangeUint32ToUint64) \ V(Word32Clz) class CodeStubAssembler { public: // Create with CallStub linkage. // |result_size| specifies the number of results returned by the stub. // TODO(rmcilroy): move result_size to the CallInterfaceDescriptor. CodeStubAssembler(Isolate* isolate, Zone* zone, const CallInterfaceDescriptor& descriptor, Code::Flags flags, const char* name, size_t result_size = 1); // Create with JSCall linkage. CodeStubAssembler(Isolate* isolate, Zone* zone, int parameter_count, Code::Flags flags, const char* name); virtual ~CodeStubAssembler(); Handle GenerateCode(); class Label; class Variable { public: explicit Variable(CodeStubAssembler* assembler, MachineRepresentation rep); void Bind(Node* value); Node* value() const; MachineRepresentation rep() const; bool IsBound() const; private: friend class CodeStubAssembler; class Impl; Impl* impl_; }; enum AllocationFlag : uint8_t { kNone = 0, kDoubleAlignment = 1, kPretenured = 1 << 1 }; typedef base::Flags AllocationFlags; // =========================================================================== // Base Assembler // =========================================================================== // Constants. Node* Int32Constant(int value); Node* IntPtrConstant(intptr_t value); Node* NumberConstant(double value); Node* SmiConstant(Smi* value); Node* HeapConstant(Handle object); Node* BooleanConstant(bool value); Node* ExternalConstant(ExternalReference address); Node* Float64Constant(double value); Node* BooleanMapConstant(); Node* HeapNumberMapConstant(); Node* NullConstant(); Node* UndefinedConstant(); Node* Parameter(int value); void Return(Node* value); void Bind(Label* label); void Goto(Label* label); void GotoIf(Node* condition, Label* true_label); void GotoUnless(Node* condition, Label* false_label); void Branch(Node* condition, Label* true_label, Label* false_label); void Switch(Node* index, Label* default_label, int32_t* case_values, Label** case_labels, size_t case_count); // Access to the frame pointer Node* LoadFramePointer(); Node* LoadParentFramePointer(); // Access to the stack pointer Node* LoadStackPointer(); // Load raw memory location. Node* Load(MachineType rep, Node* base); Node* Load(MachineType rep, Node* base, Node* index); // Store value to raw memory location. Node* Store(MachineRepresentation rep, Node* base, Node* value); Node* Store(MachineRepresentation rep, Node* base, Node* index, Node* value); Node* StoreNoWriteBarrier(MachineRepresentation rep, Node* base, Node* value); Node* StoreNoWriteBarrier(MachineRepresentation rep, Node* base, Node* index, Node* value); // Basic arithmetic operations. #define DECLARE_CODE_STUB_ASSEMBER_BINARY_OP(name) Node* name(Node* a, Node* b); CODE_STUB_ASSEMBLER_BINARY_OP_LIST(DECLARE_CODE_STUB_ASSEMBER_BINARY_OP) #undef DECLARE_CODE_STUB_ASSEMBER_BINARY_OP Node* WordShl(Node* value, int shift); // Unary #define DECLARE_CODE_STUB_ASSEMBER_UNARY_OP(name) Node* name(Node* a); CODE_STUB_ASSEMBLER_UNARY_OP_LIST(DECLARE_CODE_STUB_ASSEMBER_UNARY_OP) #undef DECLARE_CODE_STUB_ASSEMBER_UNARY_OP // Projections Node* Projection(int index, Node* value); // Calls Node* CallRuntime(Runtime::FunctionId function_id, Node* context); Node* CallRuntime(Runtime::FunctionId function_id, Node* context, Node* arg1); Node* CallRuntime(Runtime::FunctionId function_id, Node* context, Node* arg1, Node* arg2); Node* CallRuntime(Runtime::FunctionId function_id, Node* context, Node* arg1, Node* arg2, Node* arg3); Node* CallRuntime(Runtime::FunctionId function_id, Node* context, Node* arg1, Node* arg2, Node* arg3, Node* arg4); Node* CallRuntime(Runtime::FunctionId function_id, Node* context, Node* arg1, Node* arg2, Node* arg3, Node* arg4, Node* arg5); Node* TailCallRuntime(Runtime::FunctionId function_id, Node* context); Node* TailCallRuntime(Runtime::FunctionId function_id, Node* context, Node* arg1); Node* TailCallRuntime(Runtime::FunctionId function_id, Node* context, Node* arg1, Node* arg2); Node* TailCallRuntime(Runtime::FunctionId function_id, Node* context, Node* arg1, Node* arg2, Node* arg3); Node* TailCallRuntime(Runtime::FunctionId function_id, Node* context, Node* arg1, Node* arg2, Node* arg3, Node* arg4); Node* CallStub(Callable const& callable, Node* context, Node* arg1, size_t result_size = 1); Node* CallStub(const CallInterfaceDescriptor& descriptor, Node* target, Node* context, Node* arg1, size_t result_size = 1); Node* CallStub(const CallInterfaceDescriptor& descriptor, Node* target, Node* context, Node* arg1, Node* arg2, size_t result_size = 1); Node* CallStub(const CallInterfaceDescriptor& descriptor, Node* target, Node* context, Node* arg1, Node* arg2, Node* arg3, size_t result_size = 1); Node* CallStub(const CallInterfaceDescriptor& descriptor, Node* target, Node* context, Node* arg1, Node* arg2, Node* arg3, Node* arg4, size_t result_size = 1); Node* CallStub(const CallInterfaceDescriptor& descriptor, Node* target, Node* context, Node* arg1, Node* arg2, Node* arg3, Node* arg4, Node* arg5, size_t result_size = 1); Node* TailCallStub(Callable const& callable, Node* context, Node* arg1, Node* arg2, size_t result_size = 1); Node* TailCallStub(const CallInterfaceDescriptor& descriptor, Node* target, Node* context, Node* arg1, Node* arg2, size_t result_size = 1); Node* TailCall(const CallInterfaceDescriptor& descriptor, Node* target, Node** args, size_t result_size = 1); // =========================================================================== // Macros // =========================================================================== // Float64 operations. Node* Float64Ceil(Node* x); Node* Float64Floor(Node* x); Node* Float64Round(Node* x); Node* Float64Trunc(Node* x); // Tag a Word as a Smi value. Node* SmiTag(Node* value); // Untag a Smi value as a Word. Node* SmiUntag(Node* value); // Smi conversions. Node* SmiToFloat64(Node* value); Node* SmiToWord32(Node* value); // Smi operations. Node* SmiAdd(Node* a, Node* b); Node* SmiAddWithOverflow(Node* a, Node* b); Node* SmiSub(Node* a, Node* b); Node* SmiSubWithOverflow(Node* a, Node* b); Node* SmiEqual(Node* a, Node* b); Node* SmiLessThan(Node* a, Node* b); Node* SmiLessThanOrEqual(Node* a, Node* b); Node* SmiMin(Node* a, Node* b); // Load a value from the root array. Node* LoadRoot(Heap::RootListIndex root_index); // Check a value for smi-ness Node* WordIsSmi(Node* a); // Check that the value is a positive smi. Node* WordIsPositiveSmi(Node* a); // Load an object pointer from a buffer that isn't in the heap. Node* LoadBufferObject(Node* buffer, int offset, MachineType rep = MachineType::AnyTagged()); // Load a field from an object on the heap. Node* LoadObjectField(Node* object, int offset, MachineType rep = MachineType::AnyTagged()); // Load the floating point value of a HeapNumber. Node* LoadHeapNumberValue(Node* object); // Store the floating point value of a HeapNumber. Node* StoreHeapNumberValue(Node* object, Node* value); // Truncate the floating point value of a HeapNumber to an Int32. Node* TruncateHeapNumberValueToWord32(Node* object); // Load the bit field of a Map. Node* LoadMapBitField(Node* map); // Load bit field 2 of a map. Node* LoadMapBitField2(Node* map); // Load bit field 3 of a map. Node* LoadMapBitField3(Node* map); // Load the instance type of a map. Node* LoadMapInstanceType(Node* map); // Load the instance descriptors of a map. Node* LoadMapDescriptors(Node* map); // Load the hash field of a name. Node* LoadNameHash(Node* name); // Load an array element from a FixedArray. Node* LoadFixedArrayElementInt32Index(Node* object, Node* int32_index, int additional_offset = 0); Node* LoadFixedArrayElementSmiIndex(Node* object, Node* smi_index, int additional_offset = 0); Node* LoadFixedArrayElementConstantIndex(Node* object, int index); // Allocate an object of the given size. Node* Allocate(int size, AllocationFlags flags = kNone); // Allocate a HeapNumber without initializing its value. Node* AllocateHeapNumber(); // Allocate a HeapNumber with a specific value. Node* AllocateHeapNumberWithValue(Node* value); // Store an array element to a FixedArray. Node* StoreFixedArrayElementNoWriteBarrier(Node* object, Node* index, Node* value); // Load the Map of an HeapObject. Node* LoadMap(Node* object); // Store the Map of an HeapObject. Node* StoreMapNoWriteBarrier(Node* object, Node* map); // Load the instance type of an HeapObject. Node* LoadInstanceType(Node* object); // Load the elements backing store of a JSObject. Node* LoadElements(Node* object); // Load the length of a fixed array base instance. Node* LoadFixedArrayBaseLength(Node* array); // Returns a node that is true if the given bit is set in |word32|. template Node* BitFieldDecode(Node* word32) { return BitFieldDecode(word32, T::kShift, T::kMask); } Node* BitFieldDecode(Node* word32, uint32_t shift, uint32_t mask); // Conversions. Node* ChangeFloat64ToTagged(Node* value); Node* ChangeInt32ToTagged(Node* value); Node* TruncateTaggedToFloat64(Node* context, Node* value); Node* TruncateTaggedToWord32(Node* context, Node* value); // Branching helpers. // TODO(danno): Can we be more cleverish wrt. edge-split? void BranchIf(Node* condition, Label* if_true, Label* if_false); #define BRANCH_HELPER(name) \ void BranchIf##name(Node* a, Node* b, Label* if_true, Label* if_false) { \ BranchIf(name(a, b), if_true, if_false); \ } CODE_STUB_ASSEMBLER_COMPARE_BINARY_OP_LIST(BRANCH_HELPER) #undef BRANCH_HELPER void BranchIfSmiLessThan(Node* a, Node* b, Label* if_true, Label* if_false) { BranchIf(SmiLessThan(a, b), if_true, if_false); } void BranchIfSmiLessThanOrEqual(Node* a, Node* b, Label* if_true, Label* if_false) { BranchIf(SmiLessThanOrEqual(a, b), if_true, if_false); } void BranchIfFloat64IsNaN(Node* value, Label* if_true, Label* if_false) { BranchIfFloat64Equal(value, value, if_false, if_true); } // Helpers which delegate to RawMachineAssembler. Factory* factory() const; Isolate* isolate() const; Zone* zone() const; protected: // Protected helpers which delegate to RawMachineAssembler. Graph* graph() const; // Enables subclasses to perform operations before and after a call. virtual void CallPrologue(); virtual void CallEpilogue(); private: friend class CodeStubAssemblerTester; CodeStubAssembler(Isolate* isolate, Zone* zone, CallDescriptor* call_descriptor, Code::Flags flags, const char* name); Node* CallN(CallDescriptor* descriptor, Node* code_target, Node** args); Node* TailCallN(CallDescriptor* descriptor, Node* code_target, Node** args); Node* SmiShiftBitsConstant(); Node* AllocateRawAligned(Node* size_in_bytes, AllocationFlags flags, Node* top_address, Node* limit_address); Node* AllocateRawUnaligned(Node* size_in_bytes, AllocationFlags flags, Node* top_adddress, Node* limit_address); base::SmartPointer raw_assembler_; Code::Flags flags_; const char* name_; bool code_generated_; ZoneVector variables_; DISALLOW_COPY_AND_ASSIGN(CodeStubAssembler); }; DEFINE_OPERATORS_FOR_FLAGS(CodeStubAssembler::AllocationFlags); class CodeStubAssembler::Label { public: enum Type { kDeferred, kNonDeferred }; explicit Label(CodeStubAssembler* assembler, CodeStubAssembler::Label::Type type = CodeStubAssembler::Label::kNonDeferred) : CodeStubAssembler::Label(assembler, 0, nullptr, type) {} Label(CodeStubAssembler* assembler, CodeStubAssembler::Variable* merged_variable, CodeStubAssembler::Label::Type type = CodeStubAssembler::Label::kNonDeferred) : CodeStubAssembler::Label(assembler, 1, &merged_variable, type) {} Label(CodeStubAssembler* assembler, int merged_variable_count, CodeStubAssembler::Variable** merged_variables, CodeStubAssembler::Label::Type type = CodeStubAssembler::Label::kNonDeferred); ~Label() {} private: friend class CodeStubAssembler; void Bind(); void MergeVariables(); bool bound_; size_t merge_count_; CodeStubAssembler* assembler_; RawMachineLabel* label_; // Map of variables that need to be merged to their phi nodes (or placeholders // for those phis). std::map variable_phis_; // Map of variables to the list of value nodes that have been added from each // merge path in their order of merging. std::map> variable_merges_; }; } // namespace compiler } // namespace internal } // namespace v8 #endif // V8_COMPILER_CODE_STUB_ASSEMBLER_H_