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 //===----------------------------------------------------------------------===//
18 class AbstractInterpreter;
22 class ReduceMiscompilingPasses;
23 class ReduceMiscompilingFunctions;
24 class ReduceCrashingFunctions;
25 class ReduceCrashingBlocks;
31 const std::string ToolName; // Name of bugpoint
32 std::string ReferenceOutputFile; // Name of `good' output file
33 Module *Program; // The raw program, linked together
34 std::vector<const PassInfo*> PassesToRun;
35 AbstractInterpreter *Interpreter; // How to run the program
39 // FIXME: sort out public/private distinctions...
40 friend class DebugCrashes;
41 friend class ReduceMiscompilingPasses;
42 friend class ReduceMiscompilingFunctions;
43 friend class ReduceMisCodegenFunctions;
44 friend class ReduceCrashingFunctions;
45 friend class ReduceCrashingBlocks;
48 BugDriver(const char *toolname);
50 const std::string &getToolName() const { return ToolName; }
52 // Set up methods... these methods are used to copy information about the
53 // command line arguments into instance variables of BugDriver.
55 bool addSources(const std::vector<std::string> &FileNames);
57 void addPasses(It I, It E) { PassesToRun.insert(PassesToRun.end(), I, E); }
59 /// run - The top level method that is invoked after all of the instance
60 /// variables are set up from command line arguments.
64 /// debugCrash - This method is called when some pass crashes on input. It
65 /// attempts to prune down the testcase to something reasonable, and figure
66 /// out exactly which pass is crashing.
70 /// debugMiscompilation - This method is used when the passes selected are not
71 /// crashing, but the generated output is semantically different from the
73 bool debugMiscompilation();
75 /// debugPassMiscompilation - This method is called when the specified pass
76 /// miscompiles Program as input. It tries to reduce the testcase to
77 /// something that smaller that still miscompiles the program.
78 /// ReferenceOutput contains the filename of the file containing the output we
81 bool debugPassMiscompilation(const PassInfo *ThePass,
82 const std::string &ReferenceOutput);
84 /// compileSharedObject - This method creates a SharedObject from a given
85 /// BytecodeFile for debugging a code generator.
86 int compileSharedObject(const std::string &BytecodeFile,
87 std::string &SharedObject);
89 /// debugCodeGenerator - This method narrows down a module to a function or
90 /// set of functions, using the CBE as a ``safe'' code generator for other
91 /// functions that are not under consideration.
92 bool debugCodeGenerator();
94 /// isExecutingJIT - Returns true if bugpoint is currently testing the JIT
96 bool isExecutingJIT();
99 /// ParseInputFile - Given a bytecode or assembly input filename, parse and
100 /// return it, or return null if not possible.
102 Module *ParseInputFile(const std::string &InputFilename) const;
104 /// writeProgramToFile - This writes the current "Program" to the named
105 /// bytecode file. If an error occurs, true is returned.
107 bool writeProgramToFile(const std::string &Filename, Module *M = 0) const;
110 /// EmitProgressBytecode - This function is used to output the current Program
111 /// to a file named "bugpoing-ID.bc".
113 void EmitProgressBytecode(const std::string &ID, bool NoFlyer = false);
115 /// runPasses - Run the specified passes on Program, outputting a bytecode
116 /// file and writting the filename into OutputFile if successful. If the
117 /// optimizations fail for some reason (optimizer crashes), return true,
118 /// otherwise return false. If DeleteOutput is set to true, the bytecode is
119 /// deleted on success, and the filename string is undefined. This prints to
120 /// cout a single line message indicating whether compilation was successful
121 /// or failed, unless Quiet is set.
123 bool runPasses(const std::vector<const PassInfo*> &PassesToRun,
124 std::string &OutputFilename, bool DeleteOutput = false,
125 bool Quiet = false) const;
127 /// runPasses - Just like the method above, but this just returns true or
128 /// false indicating whether or not the optimizer crashed on the specified
129 /// input (true = crashed).
131 bool runPasses(const std::vector<const PassInfo*> &PassesToRun,
132 bool DeleteOutput = true) const {
133 std::string Filename;
134 return runPasses(PassesToRun, Filename, DeleteOutput);
137 /// PrintFunctionList - prints out list of problematic functions
139 static void PrintFunctionList(const std::vector<Function*> &Funcs);
141 /// deleteInstructionFromProgram - This method clones the current Program and
142 /// deletes the specified instruction from the cloned module. It then runs a
143 /// series of cleanup passes (ADCE and SimplifyCFG) to eliminate any code
144 /// which depends on the value. The modified module is then returned.
146 Module *deleteInstructionFromProgram(Instruction *I, unsigned Simp) const;
148 /// performFinalCleanups - This method clones the current Program and performs
149 /// a series of cleanups intended to get rid of extra cruft on the module
150 /// before handing it to the user... if the module parameter is specified, it
151 /// operates directly on the specified Module, modifying it in place.
153 Module *performFinalCleanups(Module *M = 0) const;
155 /// initializeExecutionEnvironment - This method is used to set up the
156 /// environment for executing LLVM programs.
158 bool initializeExecutionEnvironment();
160 /// executeProgram - This method runs "Program", capturing the output of the
161 /// program to a file, returning the filename of the file. A recommended
162 /// filename may be optionally specified.
164 std::string executeProgram(std::string RequestedOutputFilename = "",
165 std::string Bytecode = "",
166 std::string SharedObject = "",
167 AbstractInterpreter *AI = 0);
169 /// executeProgramWithCBE - Used to create reference output with the C
170 /// backend, if reference output is not provided.
171 std::string executeProgramWithCBE(std::string RequestedOutputFilename = "",
172 std::string Bytecode = "",
173 std::string SharedObject = "");
175 /// diffProgram - This method executes the specified module and diffs the
176 /// output against the file specified by ReferenceOutputFile. If the output
177 /// is different, true is returned.
179 bool diffProgram(const std::string &BytecodeFile = "",
180 const std::string &SharedObject = "",
181 bool RemoveBytecode = false);
184 /// getPassesString - Turn a list of passes into a string which indicates the
185 /// command line options that must be passed to add the passes.
187 std::string getPassesString(const std::vector<const PassInfo*> &Passes);
189 // DeleteFunctionBody - "Remove" the function by deleting all of it's basic
190 // blocks, making it external.
192 void DeleteFunctionBody(Function *F);