1 // Copyright 2016 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_OPERATION_TYPER_H_ 6 #define V8_COMPILER_OPERATION_TYPER_H_ 7 8 #include "src/base/flags.h" 9 #include "src/compiler/opcodes.h" 10 11 namespace v8 { 12 namespace internal { 13 14 class Isolate; 15 class RangeType; 16 class Type; 17 class TypeCache; 18 class Zone; 19 20 namespace compiler { 21 22 class OperationTyper { 23 public: 24 OperationTyper(Isolate* isolate, Zone* zone); 25 26 // Typing Phi. 27 Type* Merge(Type* left, Type* right); 28 29 Type* ToPrimitive(Type* type); 30 31 // Helpers for number operation typing. 32 Type* ToNumber(Type* type); 33 Type* WeakenRange(Type* current_range, Type* previous_range); 34 35 Type* NumericAdd(Type* lhs, Type* rhs); 36 Type* NumericSubtract(Type* lhs, Type* rhs); 37 Type* NumericMultiply(Type* lhs, Type* rhs); 38 Type* NumericDivide(Type* lhs, Type* rhs); 39 Type* NumericModulus(Type* lhs, Type* rhs); 40 41 enum ComparisonOutcomeFlags { 42 kComparisonTrue = 1, 43 kComparisonFalse = 2, 44 kComparisonUndefined = 4 45 }; 46 47 // Javascript binop typers. 48 #define DECLARE_CASE(x) Type* Type##x(Type* lhs, Type* rhs); 49 JS_SIMPLE_BINOP_LIST(DECLARE_CASE) 50 #undef DECLARE_CASE 51 52 Type* singleton_false() { return singleton_false_; } 53 Type* singleton_true() { return singleton_true_; } 54 Type* singleton_the_hole() { return singleton_the_hole_; } 55 56 private: 57 typedef base::Flags<ComparisonOutcomeFlags> ComparisonOutcome; 58 59 ComparisonOutcome Invert(ComparisonOutcome); 60 Type* Invert(Type*); 61 Type* FalsifyUndefined(ComparisonOutcome); 62 63 Type* Rangify(Type*); 64 Type* AddRanger(double lhs_min, double lhs_max, double rhs_min, 65 double rhs_max); 66 Type* SubtractRanger(RangeType* lhs, RangeType* rhs); 67 Type* MultiplyRanger(Type* lhs, Type* rhs); 68 Type* ModulusRanger(RangeType* lhs, RangeType* rhs); 69 70 Zone* zone() { return zone_; } 71 72 Zone* zone_; 73 TypeCache const& cache_; 74 75 Type* singleton_false_; 76 Type* singleton_true_; 77 Type* singleton_the_hole_; 78 }; 79 80 } // namespace compiler 81 } // namespace internal 82 } // namespace v8 83 84 #endif // V8_COMPILER_OPERATION_TYPER_H_ 85
