1//===- ThreadSafetyLogical.h -----------------------------------*- C++ --*-===// 2// 3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4// See https://llvm.org/LICENSE.txt for license information. 5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6// 7//===----------------------------------------------------------------------===// 8// This file defines a representation for logical expressions with SExpr leaves 9// that are used as part of fact-checking capability expressions. 10//===----------------------------------------------------------------------===// 11 12#ifndef LLVM_CLANG_ANALYSIS_ANALYSES_THREADSAFETYLOGICAL_H 13#define LLVM_CLANG_ANALYSIS_ANALYSES_THREADSAFETYLOGICAL_H 14 15#include "clang/Analysis/Analyses/ThreadSafetyTIL.h" 16 17namespace clang { 18namespace threadSafety { 19namespace lexpr { 20 21class LExpr { 22public: 23 enum Opcode { 24 Terminal, 25 And, 26 Or, 27 Not 28 }; 29 Opcode kind() const { return Kind; } 30 31 /// Logical implication. Returns true if the LExpr implies RHS, i.e. if 32 /// the LExpr holds, then RHS must hold. For example, (A & B) implies A. 33 inline bool implies(const LExpr *RHS) const; 34 35protected: 36 LExpr(Opcode Kind) : Kind(Kind) {} 37 38private: 39 Opcode Kind; 40}; 41 42class Terminal : public LExpr { 43 til::SExpr *Expr; 44 45public: 46 Terminal(til::SExpr *Expr) : LExpr(LExpr::Terminal), Expr(Expr) {} 47 48 const til::SExpr *expr() const { return Expr; } 49 til::SExpr *expr() { return Expr; } 50 51 static bool classof(const LExpr *E) { return E->kind() == LExpr::Terminal; } 52}; 53 54class BinOp : public LExpr { 55 LExpr *LHS, *RHS; 56 57protected: 58 BinOp(LExpr *LHS, LExpr *RHS, Opcode Code) : LExpr(Code), LHS(LHS), RHS(RHS) {} 59 60public: 61 const LExpr *left() const { return LHS; } 62 LExpr *left() { return LHS; } 63 64 const LExpr *right() const { return RHS; } 65 LExpr *right() { return RHS; } 66}; 67 68class And : public BinOp { 69public: 70 And(LExpr *LHS, LExpr *RHS) : BinOp(LHS, RHS, LExpr::And) {} 71 72 static bool classof(const LExpr *E) { return E->kind() == LExpr::And; } 73}; 74 75class Or : public BinOp { 76public: 77 Or(LExpr *LHS, LExpr *RHS) : BinOp(LHS, RHS, LExpr::Or) {} 78 79 static bool classof(const LExpr *E) { return E->kind() == LExpr::Or; } 80}; 81 82class Not : public LExpr { 83 LExpr *Exp; 84 85public: 86 Not(LExpr *Exp) : LExpr(LExpr::Not), Exp(Exp) {} 87 88 const LExpr *exp() const { return Exp; } 89 LExpr *exp() { return Exp; } 90 91 static bool classof(const LExpr *E) { return E->kind() == LExpr::Not; } 92}; 93 94/// Logical implication. Returns true if LHS implies RHS, i.e. if LHS 95/// holds, then RHS must hold. For example, (A & B) implies A. 96bool implies(const LExpr *LHS, const LExpr *RHS); 97 98bool LExpr::implies(const LExpr *RHS) const { 99 return lexpr::implies(this, RHS); 100} 101 102} 103} 104} 105 106#endif 107 108