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| Rev | Author | Line No. | Line |
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| 14 | pmbaty | 1 | //===- ReachableCode.h -----------------------------------------*- C++ --*-===// |
| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | // |
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| 9 | // A flow-sensitive, path-insensitive analysis of unreachable code. |
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| 10 | // |
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| 11 | //===----------------------------------------------------------------------===// |
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| 12 | |||
| 13 | #ifndef LLVM_CLANG_ANALYSIS_ANALYSES_REACHABLECODE_H |
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| 14 | #define LLVM_CLANG_ANALYSIS_ANALYSES_REACHABLECODE_H |
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| 15 | |||
| 16 | #include "clang/Basic/SourceLocation.h" |
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| 17 | |||
| 18 | //===----------------------------------------------------------------------===// |
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| 19 | // Forward declarations. |
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| 20 | //===----------------------------------------------------------------------===// |
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| 21 | |||
| 22 | namespace llvm { |
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| 23 | class BitVector; |
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| 24 | } |
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| 25 | |||
| 26 | namespace clang { |
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| 27 | class AnalysisDeclContext; |
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| 28 | class CFGBlock; |
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| 29 | class Preprocessor; |
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| 30 | } |
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| 31 | |||
| 32 | //===----------------------------------------------------------------------===// |
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| 33 | // API. |
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| 34 | //===----------------------------------------------------------------------===// |
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| 35 | |||
| 36 | namespace clang { |
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| 37 | namespace reachable_code { |
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| 38 | |||
| 39 | /// Classifications of unreachable code. |
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| 40 | enum UnreachableKind { |
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| 41 | UK_Return, |
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| 42 | UK_Break, |
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| 43 | UK_Loop_Increment, |
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| 44 | UK_Other |
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| 45 | }; |
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| 46 | |||
| 47 | class Callback { |
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| 48 | virtual void anchor(); |
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| 49 | public: |
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| 50 | virtual ~Callback() {} |
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| 51 | virtual void HandleUnreachable(UnreachableKind UK, |
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| 52 | SourceLocation L, |
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| 53 | SourceRange ConditionVal, |
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| 54 | SourceRange R1, |
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| 55 | SourceRange R2) = 0; |
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| 56 | }; |
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| 57 | |||
| 58 | /// ScanReachableFromBlock - Mark all blocks reachable from Start. |
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| 59 | /// Returns the total number of blocks that were marked reachable. |
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| 60 | unsigned ScanReachableFromBlock(const CFGBlock *Start, |
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| 61 | llvm::BitVector &Reachable); |
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| 62 | |||
| 63 | void FindUnreachableCode(AnalysisDeclContext &AC, Preprocessor &PP, |
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| 64 | Callback &CB); |
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| 65 | |||
| 66 | }} // end namespace clang::reachable_code |
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| 67 | |||
| 68 | #endif |