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 //===----------------------------------------------------------------------===//
28 class AbstractInterpreter;
36 extern bool DisableSimplifyCFG;
38 /// BugpointIsInterrupted - Set to true when the user presses ctrl-c.
40 extern bool BugpointIsInterrupted;
43 const std::string ToolName; // Name of bugpoint
44 std::string ReferenceOutputFile; // Name of `good' output file
45 Module *Program; // The raw program, linked together
46 std::vector<const PassInfo*> PassesToRun;
47 AbstractInterpreter *Interpreter; // How to run the program
53 // FIXME: sort out public/private distinctions...
54 friend class ReducePassList;
55 friend class ReduceMisCodegenFunctions;
58 BugDriver(const char *toolname, bool as_child, unsigned timeout);
60 const std::string &getToolName() const { return ToolName; }
62 // Set up methods... these methods are used to copy information about the
63 // command line arguments into instance variables of BugDriver.
65 bool addSources(const std::vector<std::string> &FileNames);
67 void addPasses(It I, It E) { PassesToRun.insert(PassesToRun.end(), I, E); }
68 void setPassesToRun(const std::vector<const PassInfo*> &PTR) {
71 const std::vector<const PassInfo*> &getPassesToRun() const {
75 /// run - The top level method that is invoked after all of the instance
76 /// variables are set up from command line arguments. The \p as_child argument
77 /// indicates whether the driver is to run in parent mode or child mode.
81 /// debugOptimizerCrash - This method is called when some optimizer pass
82 /// crashes on input. It attempts to prune down the testcase to something
83 /// reasonable, and figure out exactly which pass is crashing.
85 bool debugOptimizerCrash();
87 /// debugCodeGeneratorCrash - This method is called when the code generator
88 /// crashes on an input. It attempts to reduce the input as much as possible
89 /// while still causing the code generator to crash.
90 bool debugCodeGeneratorCrash();
92 /// debugMiscompilation - This method is used when the passes selected are not
93 /// crashing, but the generated output is semantically different from the
95 bool debugMiscompilation();
97 /// debugPassMiscompilation - This method is called when the specified pass
98 /// miscompiles Program as input. It tries to reduce the testcase to
99 /// something that smaller that still miscompiles the program.
100 /// ReferenceOutput contains the filename of the file containing the output we
103 bool debugPassMiscompilation(const PassInfo *ThePass,
104 const std::string &ReferenceOutput);
106 /// compileSharedObject - This method creates a SharedObject from a given
107 /// BytecodeFile for debugging a code generator.
109 std::string compileSharedObject(const std::string &BytecodeFile);
111 /// debugCodeGenerator - This method narrows down a module to a function or
112 /// set of functions, using the CBE as a ``safe'' code generator for other
113 /// functions that are not under consideration.
114 bool debugCodeGenerator();
116 /// isExecutingJIT - Returns true if bugpoint is currently testing the JIT
118 bool isExecutingJIT();
120 /// runPasses - Run all of the passes in the "PassesToRun" list, discard the
121 /// output, and return true if any of the passes crashed.
122 bool runPasses(Module *M = 0) {
123 if (M == 0) M = Program;
124 std::swap(M, Program);
125 bool Result = runPasses(PassesToRun);
126 std::swap(M, Program);
130 Module *getProgram() const { return Program; }
132 /// swapProgramIn - Set the current module to the specified module, returning
134 Module *swapProgramIn(Module *M) {
135 Module *OldProgram = Program;
140 AbstractInterpreter *switchToCBE() {
141 AbstractInterpreter *Old = Interpreter;
142 Interpreter = (AbstractInterpreter*)cbe;
146 void switchToInterpreter(AbstractInterpreter *AI) {
150 /// setNewProgram - If we reduce or update the program somehow, call this
151 /// method to update bugdriver with it. This deletes the old module and sets
152 /// the specified one as the current program.
153 void setNewProgram(Module *M);
155 /// compileProgram - Try to compile the specified module, throwing an
156 /// exception if an error occurs, or returning normally if not. This is used
157 /// for code generation crash testing.
159 void compileProgram(Module *M);
161 /// executeProgram - This method runs "Program", capturing the output of the
162 /// program to a file, returning the filename of the file. A recommended
163 /// filename may be optionally specified. If there is a problem with the code
164 /// generator (e.g., llc crashes), this will throw an exception.
166 std::string executeProgram(std::string RequestedOutputFilename = "",
167 std::string Bytecode = "",
168 const std::string &SharedObjects = "",
169 AbstractInterpreter *AI = 0,
170 bool *ProgramExitedNonzero = 0);
172 /// executeProgramWithCBE - Used to create reference output with the C
173 /// backend, if reference output is not provided. If there is a problem with
174 /// the code generator (e.g., llc crashes), this will throw an exception.
176 std::string executeProgramWithCBE(std::string OutputFile = "");
178 /// diffProgram - This method executes the specified module and diffs the
179 /// output against the file specified by ReferenceOutputFile. If the output
180 /// is different, true is returned. If there is a problem with the code
181 /// generator (e.g., llc crashes), this will throw an exception.
183 bool diffProgram(const std::string &BytecodeFile = "",
184 const std::string &SharedObj = "",
185 bool RemoveBytecode = false);
186 /// EmitProgressBytecode - This function is used to output the current Program
187 /// to a file named "bugpoint-ID.bc".
189 void EmitProgressBytecode(const std::string &ID, bool NoFlyer = false);
191 /// deleteInstructionFromProgram - This method clones the current Program and
192 /// deletes the specified instruction from the cloned module. It then runs a
193 /// series of cleanup passes (ADCE and SimplifyCFG) to eliminate any code
194 /// which depends on the value. The modified module is then returned.
196 Module *deleteInstructionFromProgram(const Instruction *I, unsigned Simp)
199 /// performFinalCleanups - This method clones the current Program and performs
200 /// a series of cleanups intended to get rid of extra cruft on the module. If
201 /// the MayModifySemantics argument is true, then the cleanups is allowed to
202 /// modify how the code behaves.
204 Module *performFinalCleanups(Module *M, bool MayModifySemantics = false);
206 /// ExtractLoop - Given a module, extract up to one loop from it into a new
207 /// function. This returns null if there are no extractable loops in the
208 /// program or if the loop extractor crashes.
209 Module *ExtractLoop(Module *M);
211 /// ExtractMappedBlocksFromModule - Extract all but the specified basic blocks
212 /// into their own functions. The only detail is that M is actually a module
213 /// cloned from the one the BBs are in, so some mapping needs to be performed.
214 /// If this operation fails for some reason (ie the implementation is buggy),
215 /// this function should return null, otherwise it returns a new Module.
216 Module *ExtractMappedBlocksFromModule(const std::vector<BasicBlock*> &BBs,
219 /// runPassesOn - Carefully run the specified set of pass on the specified
220 /// module, returning the transformed module on success, or a null pointer on
221 /// failure. If AutoDebugCrashes is set to true, then bugpoint will
222 /// automatically attempt to track down a crashing pass if one exists, and
223 /// this method will never return null.
224 Module *runPassesOn(Module *M, const std::vector<const PassInfo*> &Passes,
225 bool AutoDebugCrashes = false);
227 /// runPasses - Run the specified passes on Program, outputting a bytecode
228 /// file and writting the filename into OutputFile if successful. If the
229 /// optimizations fail for some reason (optimizer crashes), return true,
230 /// otherwise return false. If DeleteOutput is set to true, the bytecode is
231 /// deleted on success, and the filename string is undefined. This prints to
232 /// cout a single line message indicating whether compilation was successful
233 /// or failed, unless Quiet is set.
235 bool runPasses(const std::vector<const PassInfo*> &PassesToRun,
236 std::string &OutputFilename, bool DeleteOutput = false,
237 bool Quiet = false) const;
239 /// writeProgramToFile - This writes the current "Program" to the named
240 /// bytecode file. If an error occurs, true is returned.
242 bool writeProgramToFile(const std::string &Filename, Module *M = 0) const;
245 /// runPasses - Just like the method above, but this just returns true or
246 /// false indicating whether or not the optimizer crashed on the specified
247 /// input (true = crashed).
249 bool runPasses(const std::vector<const PassInfo*> &PassesToRun,
250 bool DeleteOutput = true) const {
251 std::string Filename;
252 return runPasses(PassesToRun, Filename, DeleteOutput);
255 /// runAsChild - The actual "runPasses" guts that runs in a child process.
256 int runPassesAsChild(const std::vector<const PassInfo*> &PassesToRun);
258 /// initializeExecutionEnvironment - This method is used to set up the
259 /// environment for executing LLVM programs.
261 bool initializeExecutionEnvironment();
264 /// ParseInputFile - Given a bytecode or assembly input filename, parse and
265 /// return it, or return null if not possible.
267 Module *ParseInputFile(const std::string &InputFilename);
270 /// getPassesString - Turn a list of passes into a string which indicates the
271 /// command line options that must be passed to add the passes.
273 std::string getPassesString(const std::vector<const PassInfo*> &Passes);
275 /// PrintFunctionList - prints out list of problematic functions
277 void PrintFunctionList(const std::vector<Function*> &Funcs);
279 // DeleteFunctionBody - "Remove" the function by deleting all of it's basic
280 // blocks, making it external.
282 void DeleteFunctionBody(Function *F);
284 /// SplitFunctionsOutOfModule - Given a module and a list of functions in the
285 /// module, split the functions OUT of the specified module, and place them in
287 Module *SplitFunctionsOutOfModule(Module *M, const std::vector<Function*> &F);
289 } // End llvm namespace