1 //===--- LoopUnrolling.h - Unroll loops -------------------------*- 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 /// 9 /// This header contains the declarations of functions which are used to decide 10 /// which loops should be completely unrolled and mark their corresponding 11 /// CFGBlocks. It is done by tracking a stack of loops in the ProgramState. This 12 /// way specific loops can be marked as completely unrolled. For considering a 13 /// loop to be completely unrolled it has to fulfill the following requirements: 14 /// - Currently only forStmts can be considered. 15 /// - The bound has to be known. 16 /// - The counter variable has not escaped before/in the body of the loop and 17 /// changed only in the increment statement corresponding to the loop. It also 18 /// has to be initialized by a literal in the corresponding initStmt. 19 /// - Does not contain goto, switch and returnStmt. 20 /// 21 /// 22 //===----------------------------------------------------------------------===// 23 24 #ifndef LLVM_CLANG_STATICANALYZER_CORE_PATHSENSITIVE_LOOPUNROLLING_H 25 #define LLVM_CLANG_STATICANALYZER_CORE_PATHSENSITIVE_LOOPUNROLLING_H 26 27 #include "clang/Analysis/CFG.h" 28 #include "clang/StaticAnalyzer/Core/PathSensitive/ProgramState.h" 29 #include "clang/StaticAnalyzer/Core/PathSensitive/ExplodedGraph.h" 30 namespace clang { 31 namespace ento { 32 class AnalysisManager; 33 34 /// Returns if the given State indicates that is inside a completely unrolled 35 /// loop. 36 bool isUnrolledState(ProgramStateRef State); 37 38 /// Updates the stack of loops contained by the ProgramState. 39 ProgramStateRef updateLoopStack(const Stmt *LoopStmt, ASTContext &ASTCtx, 40 ExplodedNode* Pred, unsigned maxVisitOnPath); 41 42 /// Updates the given ProgramState. In current implementation it removes the top 43 /// element of the stack of loops. 44 ProgramStateRef processLoopEnd(const Stmt *LoopStmt, ProgramStateRef State); 45 46 } // end namespace ento 47 } // end namespace clang 48 49 #endif 50