1 //===- BugDriver.h - Top-Level BugPoint class -------------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // 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 //===----------------------------------------------------------------------===//
19 #include "llvm/ADT/DenseMap.h"
31 class AbstractInterpreter;
39 extern bool DisableSimplifyCFG;
41 /// BugpointIsInterrupted - Set to true when the user presses ctrl-c.
43 extern bool BugpointIsInterrupted;
47 const char *ToolName; // argv[0] of bugpoint
48 std::string ReferenceOutputFile; // Name of `good' output file
49 Module *Program; // The raw program, linked together
50 std::vector<const PassInfo*> PassesToRun;
51 AbstractInterpreter *Interpreter; // How to run the program
52 AbstractInterpreter *SafeInterpreter; // To generate reference output, etc.
60 // FIXME: sort out public/private distinctions...
61 friend class ReducePassList;
62 friend class ReduceMisCodegenFunctions;
65 BugDriver(const char *toolname, bool as_child, bool find_bugs,
66 unsigned timeout, unsigned memlimit, bool use_valgrind,
69 const char *getToolName() const { return ToolName; }
71 LLVMContext& getContext() { return Context; }
73 // Set up methods... these methods are used to copy information about the
74 // command line arguments into instance variables of BugDriver.
76 bool addSources(const std::vector<std::string> &FileNames);
78 void addPasses(It I, It E) { PassesToRun.insert(PassesToRun.end(), I, E); }
79 void setPassesToRun(const std::vector<const PassInfo*> &PTR) {
82 const std::vector<const PassInfo*> &getPassesToRun() const {
86 /// run - The top level method that is invoked after all of the instance
87 /// variables are set up from command line arguments. The \p as_child argument
88 /// indicates whether the driver is to run in parent mode or child mode.
92 /// debugOptimizerCrash - This method is called when some optimizer pass
93 /// crashes on input. It attempts to prune down the testcase to something
94 /// reasonable, and figure out exactly which pass is crashing.
96 bool debugOptimizerCrash(const std::string &ID = "passes");
98 /// debugCodeGeneratorCrash - This method is called when the code generator
99 /// crashes on an input. It attempts to reduce the input as much as possible
100 /// while still causing the code generator to crash.
101 bool debugCodeGeneratorCrash();
103 /// debugMiscompilation - This method is used when the passes selected are not
104 /// crashing, but the generated output is semantically different from the
106 bool debugMiscompilation();
108 /// debugPassMiscompilation - This method is called when the specified pass
109 /// miscompiles Program as input. It tries to reduce the testcase to
110 /// something that smaller that still miscompiles the program.
111 /// ReferenceOutput contains the filename of the file containing the output we
114 bool debugPassMiscompilation(const PassInfo *ThePass,
115 const std::string &ReferenceOutput);
117 /// compileSharedObject - This method creates a SharedObject from a given
118 /// BitcodeFile for debugging a code generator.
120 std::string compileSharedObject(const std::string &BitcodeFile);
122 /// debugCodeGenerator - This method narrows down a module to a function or
123 /// set of functions, using the CBE as a ``safe'' code generator for other
124 /// functions that are not under consideration.
125 bool debugCodeGenerator();
127 /// isExecutingJIT - Returns true if bugpoint is currently testing the JIT
129 bool isExecutingJIT();
131 /// runPasses - Run all of the passes in the "PassesToRun" list, discard the
132 /// output, and return true if any of the passes crashed.
133 bool runPasses(Module *M = 0) {
134 if (M == 0) M = Program;
135 std::swap(M, Program);
136 bool Result = runPasses(PassesToRun);
137 std::swap(M, Program);
141 Module *getProgram() const { return Program; }
143 /// swapProgramIn - Set the current module to the specified module, returning
145 Module *swapProgramIn(Module *M) {
146 Module *OldProgram = Program;
151 AbstractInterpreter *switchToSafeInterpreter() {
152 AbstractInterpreter *Old = Interpreter;
153 Interpreter = (AbstractInterpreter*)SafeInterpreter;
157 void switchToInterpreter(AbstractInterpreter *AI) {
161 /// setNewProgram - If we reduce or update the program somehow, call this
162 /// method to update bugdriver with it. This deletes the old module and sets
163 /// the specified one as the current program.
164 void setNewProgram(Module *M);
166 /// compileProgram - Try to compile the specified module, throwing an
167 /// exception if an error occurs, or returning normally if not. This is used
168 /// for code generation crash testing.
170 void compileProgram(Module *M);
172 /// executeProgram - This method runs "Program", capturing the output of the
173 /// program to a file, returning the filename of the file. A recommended
174 /// filename may be optionally specified. If there is a problem with the code
175 /// generator (e.g., llc crashes), this will throw an exception.
177 std::string executeProgram(std::string RequestedOutputFilename = "",
178 std::string Bitcode = "",
179 const std::string &SharedObjects = "",
180 AbstractInterpreter *AI = 0,
181 bool *ProgramExitedNonzero = 0);
183 /// executeProgramSafely - Used to create reference output with the "safe"
184 /// backend, if reference output is not provided. If there is a problem with
185 /// the code generator (e.g., llc crashes), this will throw an exception.
187 std::string executeProgramSafely(std::string OutputFile = "");
189 /// createReferenceFile - calls compileProgram and then records the output
190 /// into ReferenceOutputFile. Returns true if reference file created, false
191 /// otherwise. Note: initializeExecutionEnvironment should be called BEFORE
194 bool createReferenceFile(Module *M, const std::string &Filename
195 = "bugpoint.reference.out");
197 /// diffProgram - This method executes the specified module and diffs the
198 /// output against the file specified by ReferenceOutputFile. If the output
199 /// is different, true is returned. If there is a problem with the code
200 /// generator (e.g., llc crashes), this will throw an exception.
202 bool diffProgram(const std::string &BitcodeFile = "",
203 const std::string &SharedObj = "",
204 bool RemoveBitcode = false);
206 /// EmitProgressBitcode - This function is used to output the current Program
207 /// to a file named "bugpoint-ID.bc".
209 void EmitProgressBitcode(const std::string &ID, bool NoFlyer = false);
211 /// deleteInstructionFromProgram - This method clones the current Program and
212 /// deletes the specified instruction from the cloned module. It then runs a
213 /// series of cleanup passes (ADCE and SimplifyCFG) to eliminate any code
214 /// which depends on the value. The modified module is then returned.
216 Module *deleteInstructionFromProgram(const Instruction *I, unsigned Simp)
219 /// performFinalCleanups - This method clones the current Program and performs
220 /// a series of cleanups intended to get rid of extra cruft on the module. If
221 /// the MayModifySemantics argument is true, then the cleanups is allowed to
222 /// modify how the code behaves.
224 Module *performFinalCleanups(Module *M, bool MayModifySemantics = false);
226 /// ExtractLoop - Given a module, extract up to one loop from it into a new
227 /// function. This returns null if there are no extractable loops in the
228 /// program or if the loop extractor crashes.
229 Module *ExtractLoop(Module *M);
231 /// ExtractMappedBlocksFromModule - Extract all but the specified basic blocks
232 /// into their own functions. The only detail is that M is actually a module
233 /// cloned from the one the BBs are in, so some mapping needs to be performed.
234 /// If this operation fails for some reason (ie the implementation is buggy),
235 /// this function should return null, otherwise it returns a new Module.
236 Module *ExtractMappedBlocksFromModule(const std::vector<BasicBlock*> &BBs,
239 /// runPassesOn - Carefully run the specified set of pass on the specified
240 /// module, returning the transformed module on success, or a null pointer on
241 /// failure. If AutoDebugCrashes is set to true, then bugpoint will
242 /// automatically attempt to track down a crashing pass if one exists, and
243 /// this method will never return null.
244 Module *runPassesOn(Module *M, const std::vector<const PassInfo*> &Passes,
245 bool AutoDebugCrashes = false, unsigned NumExtraArgs = 0,
246 const char * const *ExtraArgs = NULL);
248 /// runPasses - Run the specified passes on Program, outputting a bitcode
249 /// file and writting the filename into OutputFile if successful. If the
250 /// optimizations fail for some reason (optimizer crashes), return true,
251 /// otherwise return false. If DeleteOutput is set to true, the bitcode is
252 /// deleted on success, and the filename string is undefined. This prints to
253 /// outs() a single line message indicating whether compilation was successful
254 /// or failed, unless Quiet is set. ExtraArgs specifies additional arguments
255 /// to pass to the child bugpoint instance.
257 bool runPasses(const std::vector<const PassInfo*> &PassesToRun,
258 std::string &OutputFilename, bool DeleteOutput = false,
259 bool Quiet = false, unsigned NumExtraArgs = 0,
260 const char * const *ExtraArgs = NULL) const;
262 /// runManyPasses - Take the specified pass list and create different
263 /// combinations of passes to compile the program with. Compile the program with
264 /// each set and mark test to see if it compiled correctly. If the passes
265 /// compiled correctly output nothing and rearrange the passes into a new order.
266 /// If the passes did not compile correctly, output the command required to
267 /// recreate the failure. This returns true if a compiler error is found.
269 bool runManyPasses(const std::vector<const PassInfo*> &AllPasses);
271 /// writeProgramToFile - This writes the current "Program" to the named
272 /// bitcode file. If an error occurs, true is returned.
274 bool writeProgramToFile(const std::string &Filename, Module *M = 0) const;
277 /// runPasses - Just like the method above, but this just returns true or
278 /// false indicating whether or not the optimizer crashed on the specified
279 /// input (true = crashed).
281 bool runPasses(const std::vector<const PassInfo*> &PassesToRun,
282 bool DeleteOutput = true) const {
283 std::string Filename;
284 return runPasses(PassesToRun, Filename, DeleteOutput);
287 /// runAsChild - The actual "runPasses" guts that runs in a child process.
288 int runPassesAsChild(const std::vector<const PassInfo*> &PassesToRun);
290 /// initializeExecutionEnvironment - This method is used to set up the
291 /// environment for executing LLVM programs.
293 bool initializeExecutionEnvironment();
296 /// ParseInputFile - Given a bitcode or assembly input filename, parse and
297 /// return it, or return null if not possible.
299 Module *ParseInputFile(const std::string &InputFilename,
303 /// getPassesString - Turn a list of passes into a string which indicates the
304 /// command line options that must be passed to add the passes.
306 std::string getPassesString(const std::vector<const PassInfo*> &Passes);
308 /// PrintFunctionList - prints out list of problematic functions
310 void PrintFunctionList(const std::vector<Function*> &Funcs);
312 /// PrintGlobalVariableList - prints out list of problematic global variables
314 void PrintGlobalVariableList(const std::vector<GlobalVariable*> &GVs);
316 // DeleteFunctionBody - "Remove" the function by deleting all of it's basic
317 // blocks, making it external.
319 void DeleteFunctionBody(Function *F);
321 /// SplitFunctionsOutOfModule - Given a module and a list of functions in the
322 /// module, split the functions OUT of the specified module, and place them in
324 Module *SplitFunctionsOutOfModule(Module *M, const std::vector<Function*> &F,
325 DenseMap<const Value*, Value*> &ValueMap);
327 } // End llvm namespace