1 //===- BugDriver.h - Top-Level BugPoint class -------------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file was developed by the LLVM research group and is distributed under
6 // the University of Illinois Open Source License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This class contains all of the shared state and information that is used by
11 // the BugPoint tool to track down errors in optimizations. This class is the
12 // main driver class that invokes all sub-functionality.
14 //===----------------------------------------------------------------------===//
27 class AbstractInterpreter;
31 class ReduceMiscompilingPasses;
32 class ReduceMiscompilingFunctions;
33 class ReduceCrashingFunctions;
34 class ReduceCrashingBlocks;
39 extern bool DisableSimplifyCFG;
42 const std::string ToolName; // Name of bugpoint
43 std::string ReferenceOutputFile; // Name of `good' output file
44 Module *Program; // The raw program, linked together
45 std::vector<const PassInfo*> PassesToRun;
46 AbstractInterpreter *Interpreter; // How to run the program
50 // FIXME: sort out public/private distinctions...
51 friend class DebugCrashes;
52 friend class ReduceMiscompilingPasses;
53 friend class ReduceMiscompilingFunctions;
54 friend class ReduceMisCodegenFunctions;
55 friend class ReduceCrashingFunctions;
56 friend class ReduceCrashingBlocks;
59 BugDriver(const char *toolname);
61 const std::string &getToolName() const { return ToolName; }
63 // Set up methods... these methods are used to copy information about the
64 // command line arguments into instance variables of BugDriver.
66 bool addSources(const std::vector<std::string> &FileNames);
68 void addPasses(It I, It E) { PassesToRun.insert(PassesToRun.end(), I, E); }
69 void setPassesToRun(const std::vector<const PassInfo*> &PTR) {
73 /// run - The top level method that is invoked after all of the instance
74 /// variables are set up from command line arguments.
78 /// debugOptimizerCrash - This method is called when some optimizer pass
79 /// crashes on input. It attempts to prune down the testcase to something
80 /// reasonable, and figure out exactly which pass is crashing.
82 bool debugOptimizerCrash();
84 /// debugCodeGeneratorCrash - This method is called when the code generator
85 /// crashes on an input. It attempts to reduce the input as much as possible
86 /// while still causing the code generator to crash.
87 bool debugCodeGeneratorCrash();
89 /// debugMiscompilation - This method is used when the passes selected are not
90 /// crashing, but the generated output is semantically different from the
92 bool debugMiscompilation();
94 /// debugPassMiscompilation - This method is called when the specified pass
95 /// miscompiles Program as input. It tries to reduce the testcase to
96 /// something that smaller that still miscompiles the program.
97 /// ReferenceOutput contains the filename of the file containing the output we
100 bool debugPassMiscompilation(const PassInfo *ThePass,
101 const std::string &ReferenceOutput);
103 /// compileSharedObject - This method creates a SharedObject from a given
104 /// BytecodeFile for debugging a code generator.
106 std::string compileSharedObject(const std::string &BytecodeFile);
108 /// debugCodeGenerator - This method narrows down a module to a function or
109 /// set of functions, using the CBE as a ``safe'' code generator for other
110 /// functions that are not under consideration.
111 bool debugCodeGenerator();
113 /// isExecutingJIT - Returns true if bugpoint is currently testing the JIT
115 bool isExecutingJIT();
118 /// ParseInputFile - Given a bytecode or assembly input filename, parse and
119 /// return it, or return null if not possible.
121 Module *ParseInputFile(const std::string &InputFilename) const;
123 /// writeProgramToFile - This writes the current "Program" to the named
124 /// bytecode file. If an error occurs, true is returned.
126 bool writeProgramToFile(const std::string &Filename, Module *M = 0) const;
129 /// EmitProgressBytecode - This function is used to output the current Program
130 /// to a file named "bugpoint-ID.bc".
132 void EmitProgressBytecode(const std::string &ID, bool NoFlyer = false);
134 /// runPasses - Run the specified passes on Program, outputting a bytecode
135 /// file and writting the filename into OutputFile if successful. If the
136 /// optimizations fail for some reason (optimizer crashes), return true,
137 /// otherwise return false. If DeleteOutput is set to true, the bytecode is
138 /// deleted on success, and the filename string is undefined. This prints to
139 /// cout a single line message indicating whether compilation was successful
140 /// or failed, unless Quiet is set.
142 bool runPasses(const std::vector<const PassInfo*> &PassesToRun,
143 std::string &OutputFilename, bool DeleteOutput = false,
144 bool Quiet = false) const;
146 /// runPasses - Just like the method above, but this just returns true or
147 /// false indicating whether or not the optimizer crashed on the specified
148 /// input (true = crashed).
150 bool runPasses(const std::vector<const PassInfo*> &PassesToRun,
151 bool DeleteOutput = true) const {
152 std::string Filename;
153 return runPasses(PassesToRun, Filename, DeleteOutput);
156 /// PrintFunctionList - prints out list of problematic functions
158 static void PrintFunctionList(const std::vector<Function*> &Funcs);
160 /// deleteInstructionFromProgram - This method clones the current Program and
161 /// deletes the specified instruction from the cloned module. It then runs a
162 /// series of cleanup passes (ADCE and SimplifyCFG) to eliminate any code
163 /// which depends on the value. The modified module is then returned.
165 Module *deleteInstructionFromProgram(Instruction *I, unsigned Simp) const;
167 /// performFinalCleanups - This method clones the current Program and performs
168 /// a series of cleanups intended to get rid of extra cruft on the module. If
169 /// the MayModifySemantics argument is true, then the cleanups is allowed to
170 /// modify how the code behaves.
172 Module *performFinalCleanups(Module *M, bool MayModifySemantics = false);
174 /// initializeExecutionEnvironment - This method is used to set up the
175 /// environment for executing LLVM programs.
177 bool initializeExecutionEnvironment();
179 /// executeProgram - This method runs "Program", capturing the output of the
180 /// program to a file, returning the filename of the file. A recommended
181 /// filename may be optionally specified. If there is a problem with the code
182 /// generator (e.g., llc crashes), this will throw an exception.
184 std::string executeProgram(std::string RequestedOutputFilename = "",
185 std::string Bytecode = "",
186 const std::string &SharedObjects = "",
187 AbstractInterpreter *AI = 0,
188 bool *ProgramExitedNonzero = 0);
190 /// executeProgramWithCBE - Used to create reference output with the C
191 /// backend, if reference output is not provided. If there is a problem with
192 /// the code generator (e.g., llc crashes), this will throw an exception.
194 std::string executeProgramWithCBE(std::string OutputFile = "");
196 /// diffProgram - This method executes the specified module and diffs the
197 /// output against the file specified by ReferenceOutputFile. If the output
198 /// is different, true is returned. If there is a problem with the code
199 /// generator (e.g., llc crashes), this will throw an exception.
201 bool diffProgram(const std::string &BytecodeFile = "",
202 const std::string &SharedObj = "",
203 bool RemoveBytecode = false);
206 /// getPassesString - Turn a list of passes into a string which indicates the
207 /// command line options that must be passed to add the passes.
209 std::string getPassesString(const std::vector<const PassInfo*> &Passes);
211 // DeleteFunctionBody - "Remove" the function by deleting all of it's basic
212 // blocks, making it external.
214 void DeleteFunctionBody(Function *F);
216 } // End llvm namespace