1 //===- BugDriver.h - Top-Level BugPoint class -------------------*- C++ -*-===//
3 // This class contains all of the shared state and information that is used by
4 // the BugPoint tool to track down errors in optimizations. This class is the
5 // main driver class that invokes all sub-functionality.
7 //===----------------------------------------------------------------------===//
17 class AbstractInterpreter;
20 class ReduceMiscompilingPasses;
21 class ReduceMiscompilingFunctions;
24 const std::string ToolName; // Name of bugpoint
25 Module *Program; // The raw program, linked together
26 std::vector<const PassInfo*> PassesToRun;
27 AbstractInterpreter *Interpreter; // How to run the program
29 friend class ReduceMiscompilingPasses;
30 friend class ReduceMiscompilingFunctions;
32 BugDriver(const char *toolname)
33 : ToolName(toolname), Program(0), Interpreter(0) {}
35 const std::string &getToolName() const { return ToolName; }
37 // Set up methods... these methods are used to copy information about the
38 // command line arguments into instance variables of BugDriver.
40 bool addSources(const std::vector<std::string> &FileNames);
42 void addPasses(It I, It E) { PassesToRun.insert(PassesToRun.end(), I, E); }
44 /// run - The top level method that is invoked after all of the instance
45 /// variables are set up from command line arguments.
49 /// debugCrash - This method is called when some pass crashes on input. It
50 /// attempts to prune down the testcase to something reasonable, and figure
51 /// out exactly which pass is crashing.
55 /// debugPassCrash - This method is called when the specified pass crashes on
56 /// Program as input. It tries to reduce the testcase to something that still
57 /// crashes, but it smaller.
59 bool debugPassCrash(const PassInfo *PI);
61 /// debugMiscompilation - This method is used when the passes selected are not
62 /// crashing, but the generated output is semantically different from the
64 bool debugMiscompilation();
66 /// debugPassMiscompilation - This method is called when the specified pass
67 /// miscompiles Program as input. It tries to reduce the testcase to
68 /// something that smaller that still miscompiles the program.
69 /// ReferenceOutput contains the filename of the file containing the output we
72 bool debugPassMiscompilation(const PassInfo *ThePass,
73 const std::string &ReferenceOutput);
76 /// ParseInputFile - Given a bytecode or assembly input filename, parse and
77 /// return it, or return null if not possible.
79 Module *ParseInputFile(const std::string &InputFilename) const;
81 /// writeProgramToFile - This writes the current "Program" to the named
82 /// bytecode file. If an error occurs, true is returned.
84 bool writeProgramToFile(const std::string &Filename, Module *M = 0) const;
87 /// EmitProgressBytecode - This function is used to output the current Program
88 /// to a file named "bugpoing-ID.bc".
90 void EmitProgressBytecode(const std::string &ID, bool NoFlyer = false);
92 /// runPasses - Run the specified passes on Program, outputting a bytecode
93 /// file and writting the filename into OutputFile if successful. If the
94 /// optimizations fail for some reason (optimizer crashes), return true,
95 /// otherwise return false. If DeleteOutput is set to true, the bytecode is
96 /// deleted on success, and the filename string is undefined. This prints to
97 /// cout a single line message indicating whether compilation was successful
98 /// or failed, unless Quiet is set.
100 bool runPasses(const std::vector<const PassInfo*> &PassesToRun,
101 std::string &OutputFilename, bool DeleteOutput = false,
102 bool Quiet = false) const;
104 /// runPasses - Just like the method above, but this just returns true or
105 /// false indicating whether or not the optimizer crashed on the specified
106 /// input (true = crashed).
108 bool runPasses(const std::vector<const PassInfo*> &PassesToRun,
109 bool DeleteOutput = true) const {
110 std::string Filename;
111 return runPasses(PassesToRun, Filename, DeleteOutput);
114 /// runPass - Run only the specified pass on the program.
116 bool runPass(const PassInfo *P, bool DeleteOutput = true) const {
117 return runPasses(std::vector<const PassInfo*>(1, P), DeleteOutput);
120 /// extractFunctionFromModule - This method is used to extract the specified
121 /// (non-external) function from the current program, slim down the module,
122 /// and then return it. This does not modify Program at all, it modifies a
123 /// copy, which it returns.
125 Module *extractFunctionFromModule(Function *F) const;
127 /// deleteInstructionFromProgram - This method clones the current Program and
128 /// deletes the specified instruction from the cloned module. It then runs a
129 /// series of cleanup passes (ADCE and SimplifyCFG) to eliminate any code
130 /// which depends on the value. The modified module is then returned.
132 Module *deleteInstructionFromProgram(Instruction *I, unsigned Simp) const;
134 /// performFinalCleanups - This method clones the current Program and performs
135 /// a series of cleanups intended to get rid of extra cruft on the module
136 /// before handing it to the user...
138 Module *performFinalCleanups() const;
140 /// initializeExecutionEnvironment - This method is used to set up the
141 /// environment for executing LLVM programs.
143 bool initializeExecutionEnvironment();
145 /// executeProgram - This method runs "Program", capturing the output of the
146 /// program to a file, returning the filename of the file. A recommended
147 /// filename may be optionally specified.
149 std::string executeProgram(std::string RequestedOutputFilename = "",
150 std::string Bytecode = "");
152 /// diffProgram - This method executes the specified module and diffs the
153 /// output against the file specified by ReferenceOutputFile. If the output
154 /// is different, true is returned.
156 bool diffProgram(const std::string &ReferenceOutputFile,
157 const std::string &BytecodeFile = "",
158 bool RemoveBytecode = false);
161 /// getPassesString - Turn a list of passes into a string which indicates the
162 /// command line options that must be passed to add the passes.
164 std::string getPassesString(const std::vector<const PassInfo*> &Passes);