Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 1 | // Copyright 2013 the V8 project authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | #ifndef V8_COMPILER_JS_OPERATOR_H_ |
| 6 | #define V8_COMPILER_JS_OPERATOR_H_ |
| 7 | |
| 8 | #include "src/compiler/linkage.h" |
| 9 | #include "src/compiler/opcodes.h" |
| 10 | #include "src/compiler/operator.h" |
| 11 | #include "src/unique.h" |
| 12 | #include "src/zone.h" |
| 13 | |
| 14 | namespace v8 { |
| 15 | namespace internal { |
| 16 | namespace compiler { |
| 17 | |
| 18 | // Defines the location of a context slot relative to a specific scope. This is |
| 19 | // used as a parameter by JSLoadContext and JSStoreContext operators and allows |
| 20 | // accessing a context-allocated variable without keeping track of the scope. |
| 21 | class ContextAccess { |
| 22 | public: |
| 23 | ContextAccess(int depth, int index, bool immutable) |
| 24 | : immutable_(immutable), depth_(depth), index_(index) { |
| 25 | DCHECK(0 <= depth && depth <= kMaxUInt16); |
| 26 | DCHECK(0 <= index && static_cast<uint32_t>(index) <= kMaxUInt32); |
| 27 | } |
| 28 | int depth() const { return depth_; } |
| 29 | int index() const { return index_; } |
| 30 | bool immutable() const { return immutable_; } |
| 31 | |
| 32 | private: |
| 33 | // For space reasons, we keep this tightly packed, otherwise we could just use |
| 34 | // a simple int/int/bool POD. |
| 35 | const bool immutable_; |
| 36 | const uint16_t depth_; |
| 37 | const uint32_t index_; |
| 38 | }; |
| 39 | |
| 40 | // Defines the property being loaded from an object by a named load. This is |
| 41 | // used as a parameter by JSLoadNamed operators. |
| 42 | struct LoadNamedParameters { |
| 43 | Unique<Name> name; |
| 44 | ContextualMode contextual_mode; |
| 45 | }; |
| 46 | |
| 47 | // Defines the arity and the call flags for a JavaScript function call. This is |
| 48 | // used as a parameter by JSCall operators. |
| 49 | struct CallParameters { |
| 50 | int arity; |
| 51 | CallFunctionFlags flags; |
| 52 | }; |
| 53 | |
| 54 | // Defines the property being stored to an object by a named store. This is |
| 55 | // used as a parameter by JSStoreNamed operators. |
| 56 | struct StoreNamedParameters { |
| 57 | StrictMode strict_mode; |
| 58 | Unique<Name> name; |
| 59 | }; |
| 60 | |
| 61 | // Interface for building JavaScript-level operators, e.g. directly from the |
| 62 | // AST. Most operators have no parameters, thus can be globally shared for all |
| 63 | // graphs. |
| 64 | class JSOperatorBuilder { |
| 65 | public: |
| 66 | explicit JSOperatorBuilder(Zone* zone) : zone_(zone) {} |
| 67 | |
| 68 | #define SIMPLE(name, properties, inputs, outputs) \ |
| 69 | return new (zone_) \ |
| 70 | SimpleOperator(IrOpcode::k##name, properties, inputs, outputs, #name); |
| 71 | |
| 72 | #define NOPROPS(name, inputs, outputs) \ |
| 73 | SIMPLE(name, Operator::kNoProperties, inputs, outputs) |
| 74 | |
| 75 | #define OP1(name, ptype, pname, properties, inputs, outputs) \ |
| 76 | return new (zone_) Operator1<ptype>(IrOpcode::k##name, properties, inputs, \ |
| 77 | outputs, #name, pname) |
| 78 | |
| 79 | #define BINOP(name) NOPROPS(name, 2, 1) |
| 80 | #define UNOP(name) NOPROPS(name, 1, 1) |
| 81 | |
| 82 | #define PURE_BINOP(name) SIMPLE(name, Operator::kPure, 2, 1) |
| 83 | |
| 84 | const Operator* Equal() { BINOP(JSEqual); } |
| 85 | const Operator* NotEqual() { BINOP(JSNotEqual); } |
| 86 | const Operator* StrictEqual() { PURE_BINOP(JSStrictEqual); } |
| 87 | const Operator* StrictNotEqual() { PURE_BINOP(JSStrictNotEqual); } |
| 88 | const Operator* LessThan() { BINOP(JSLessThan); } |
| 89 | const Operator* GreaterThan() { BINOP(JSGreaterThan); } |
| 90 | const Operator* LessThanOrEqual() { BINOP(JSLessThanOrEqual); } |
| 91 | const Operator* GreaterThanOrEqual() { BINOP(JSGreaterThanOrEqual); } |
| 92 | const Operator* BitwiseOr() { BINOP(JSBitwiseOr); } |
| 93 | const Operator* BitwiseXor() { BINOP(JSBitwiseXor); } |
| 94 | const Operator* BitwiseAnd() { BINOP(JSBitwiseAnd); } |
| 95 | const Operator* ShiftLeft() { BINOP(JSShiftLeft); } |
| 96 | const Operator* ShiftRight() { BINOP(JSShiftRight); } |
| 97 | const Operator* ShiftRightLogical() { BINOP(JSShiftRightLogical); } |
| 98 | const Operator* Add() { BINOP(JSAdd); } |
| 99 | const Operator* Subtract() { BINOP(JSSubtract); } |
| 100 | const Operator* Multiply() { BINOP(JSMultiply); } |
| 101 | const Operator* Divide() { BINOP(JSDivide); } |
| 102 | const Operator* Modulus() { BINOP(JSModulus); } |
| 103 | |
| 104 | const Operator* UnaryNot() { UNOP(JSUnaryNot); } |
| 105 | const Operator* ToBoolean() { UNOP(JSToBoolean); } |
| 106 | const Operator* ToNumber() { UNOP(JSToNumber); } |
| 107 | const Operator* ToString() { UNOP(JSToString); } |
| 108 | const Operator* ToName() { UNOP(JSToName); } |
| 109 | const Operator* ToObject() { UNOP(JSToObject); } |
| 110 | const Operator* Yield() { UNOP(JSYield); } |
| 111 | |
| 112 | const Operator* Create() { SIMPLE(JSCreate, Operator::kEliminatable, 0, 1); } |
| 113 | |
| 114 | const Operator* Call(int arguments, CallFunctionFlags flags) { |
| 115 | CallParameters parameters = {arguments, flags}; |
| 116 | OP1(JSCallFunction, CallParameters, parameters, Operator::kNoProperties, |
| 117 | arguments, 1); |
| 118 | } |
| 119 | |
| 120 | const Operator* CallNew(int arguments) { |
| 121 | return new (zone_) |
| 122 | Operator1<int>(IrOpcode::kJSCallConstruct, Operator::kNoProperties, |
| 123 | arguments, 1, "JSCallConstruct", arguments); |
| 124 | } |
| 125 | |
| 126 | const Operator* LoadProperty() { BINOP(JSLoadProperty); } |
| 127 | const Operator* LoadNamed(Unique<Name> name, |
| 128 | ContextualMode contextual_mode = NOT_CONTEXTUAL) { |
| 129 | LoadNamedParameters parameters = {name, contextual_mode}; |
| 130 | OP1(JSLoadNamed, LoadNamedParameters, parameters, Operator::kNoProperties, |
| 131 | 1, 1); |
| 132 | } |
| 133 | |
| 134 | const Operator* StoreProperty(StrictMode strict_mode) { |
| 135 | OP1(JSStoreProperty, StrictMode, strict_mode, Operator::kNoProperties, 3, |
| 136 | 0); |
| 137 | } |
| 138 | |
| 139 | const Operator* StoreNamed(StrictMode strict_mode, Unique<Name> name) { |
| 140 | StoreNamedParameters parameters = {strict_mode, name}; |
| 141 | OP1(JSStoreNamed, StoreNamedParameters, parameters, Operator::kNoProperties, |
| 142 | 2, 0); |
| 143 | } |
| 144 | |
| 145 | const Operator* DeleteProperty(StrictMode strict_mode) { |
| 146 | OP1(JSDeleteProperty, StrictMode, strict_mode, Operator::kNoProperties, 2, |
| 147 | 1); |
| 148 | } |
| 149 | |
| 150 | const Operator* HasProperty() { NOPROPS(JSHasProperty, 2, 1); } |
| 151 | |
| 152 | const Operator* LoadContext(uint16_t depth, uint32_t index, bool immutable) { |
| 153 | ContextAccess access(depth, index, immutable); |
| 154 | OP1(JSLoadContext, ContextAccess, access, |
| 155 | Operator::kEliminatable | Operator::kNoWrite, 1, 1); |
| 156 | } |
| 157 | const Operator* StoreContext(uint16_t depth, uint32_t index) { |
| 158 | ContextAccess access(depth, index, false); |
| 159 | OP1(JSStoreContext, ContextAccess, access, Operator::kNoProperties, 2, 0); |
| 160 | } |
| 161 | |
| 162 | const Operator* TypeOf() { SIMPLE(JSTypeOf, Operator::kPure, 1, 1); } |
| 163 | const Operator* InstanceOf() { NOPROPS(JSInstanceOf, 2, 1); } |
| 164 | const Operator* Debugger() { NOPROPS(JSDebugger, 0, 0); } |
| 165 | |
| 166 | // TODO(titzer): nail down the static parts of each of these context flavors. |
| 167 | const Operator* CreateFunctionContext() { |
| 168 | NOPROPS(JSCreateFunctionContext, 1, 1); |
| 169 | } |
| 170 | const Operator* CreateCatchContext(Unique<String> name) { |
| 171 | OP1(JSCreateCatchContext, Unique<String>, name, Operator::kNoProperties, 1, |
| 172 | 1); |
| 173 | } |
| 174 | const Operator* CreateWithContext() { NOPROPS(JSCreateWithContext, 2, 1); } |
| 175 | const Operator* CreateBlockContext() { NOPROPS(JSCreateBlockContext, 2, 1); } |
| 176 | const Operator* CreateModuleContext() { |
| 177 | NOPROPS(JSCreateModuleContext, 2, 1); |
| 178 | } |
| 179 | const Operator* CreateGlobalContext() { |
| 180 | NOPROPS(JSCreateGlobalContext, 2, 1); |
| 181 | } |
| 182 | |
| 183 | const Operator* Runtime(Runtime::FunctionId function, int arguments) { |
| 184 | const Runtime::Function* f = Runtime::FunctionForId(function); |
| 185 | DCHECK(f->nargs == -1 || f->nargs == arguments); |
| 186 | OP1(JSCallRuntime, Runtime::FunctionId, function, Operator::kNoProperties, |
| 187 | arguments, f->result_size); |
| 188 | } |
| 189 | |
| 190 | #undef SIMPLE |
| 191 | #undef NOPROPS |
| 192 | #undef OP1 |
| 193 | #undef BINOP |
| 194 | #undef UNOP |
| 195 | |
| 196 | private: |
| 197 | Zone* zone_; |
| 198 | }; |
| 199 | |
| 200 | // Specialization for static parameters of type {ContextAccess}. |
| 201 | template <> |
| 202 | struct StaticParameterTraits<ContextAccess> { |
| 203 | static OStream& PrintTo(OStream& os, ContextAccess val) { // NOLINT |
| 204 | return os << val.depth() << "," << val.index() |
| 205 | << (val.immutable() ? ",imm" : ""); |
| 206 | } |
| 207 | static int HashCode(ContextAccess val) { |
| 208 | return (val.depth() << 16) | (val.index() & 0xffff); |
| 209 | } |
| 210 | static bool Equals(ContextAccess a, ContextAccess b) { |
| 211 | return a.immutable() == b.immutable() && a.depth() == b.depth() && |
| 212 | a.index() == b.index(); |
| 213 | } |
| 214 | }; |
| 215 | |
| 216 | // Specialization for static parameters of type {Runtime::FunctionId}. |
| 217 | template <> |
| 218 | struct StaticParameterTraits<Runtime::FunctionId> { |
| 219 | static OStream& PrintTo(OStream& os, Runtime::FunctionId val) { // NOLINT |
| 220 | const Runtime::Function* f = Runtime::FunctionForId(val); |
| 221 | return os << (f->name ? f->name : "?Runtime?"); |
| 222 | } |
| 223 | static int HashCode(Runtime::FunctionId val) { return static_cast<int>(val); } |
| 224 | static bool Equals(Runtime::FunctionId a, Runtime::FunctionId b) { |
| 225 | return a == b; |
| 226 | } |
| 227 | }; |
| 228 | |
| 229 | } // namespace compiler |
| 230 | } // namespace internal |
| 231 | } // namespace v8 |
| 232 | |
| 233 | #endif // V8_COMPILER_JS_OPERATOR_H_ |