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[FreeBSD/releng/9.0.git] / contrib / llvm / tools / clang / include / clang / Analysis / Analyses / UninitializedValues.h
1 //= UninitializedValues.h - Finding uses of uninitialized values --*- C++ -*-==//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This file defines APIs for invoking and reported uninitialized values
11 // warnings.
12 //
13 //===----------------------------------------------------------------------===//
14
15 #ifndef LLVM_CLANG_UNINIT_VALS_H
16 #define LLVM_CLANG_UNINIT_VALS_H
17
18 namespace clang {
19
20 class AnalysisContext;
21 class CFG;  
22 class DeclContext;
23 class Expr;
24 class VarDecl;
25   
26 class UninitVariablesHandler {
27 public:
28   UninitVariablesHandler() {}
29   virtual ~UninitVariablesHandler();
30
31   /// Called when the uninitialized variable is used at the given expression.
32   virtual void handleUseOfUninitVariable(const Expr *ex,
33                                          const VarDecl *vd,
34                                          bool isAlwaysUninit) {}
35   
36   /// Called when the uninitialized variable analysis detects the
37   /// idiom 'int x = x'.  All other uses of 'x' within the initializer
38   /// are handled by handleUseOfUninitVariable.
39   virtual void handleSelfInit(const VarDecl *vd) {}
40 };
41
42 struct UninitVariablesAnalysisStats {
43   unsigned NumVariablesAnalyzed;
44   unsigned NumBlockVisits;
45 };
46
47 void runUninitializedVariablesAnalysis(const DeclContext &dc, const CFG &cfg,
48                                        AnalysisContext &ac,
49                                        UninitVariablesHandler &handler,
50                                        UninitVariablesAnalysisStats &stats);
51
52 }
53 #endif