320 lines
13 KiB
C++
320 lines
13 KiB
C++
//===- BugDriver.h - Top-Level BugPoint class -------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This class contains all of the shared state and information that is used by
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// the BugPoint tool to track down errors in optimizations. This class is the
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// main driver class that invokes all sub-functionality.
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//
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//===----------------------------------------------------------------------===//
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#ifndef BUGDRIVER_H
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#define BUGDRIVER_H
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#include <vector>
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#include <string>
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namespace llvm {
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class PassInfo;
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class Module;
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class GlobalVariable;
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class Function;
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class BasicBlock;
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class AbstractInterpreter;
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class Instruction;
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class DebugCrashes;
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class GCC;
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extern bool DisableSimplifyCFG;
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/// BugpointIsInterrupted - Set to true when the user presses ctrl-c.
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///
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extern bool BugpointIsInterrupted;
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class BugDriver {
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const std::string ToolName; // Name of bugpoint
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std::string ReferenceOutputFile; // Name of `good' output file
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Module *Program; // The raw program, linked together
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std::vector<const PassInfo*> PassesToRun;
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AbstractInterpreter *Interpreter; // How to run the program
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AbstractInterpreter *cbe;
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GCC *gcc;
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bool run_as_child;
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bool run_find_bugs;
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unsigned Timeout;
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unsigned MemoryLimit;
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// FIXME: sort out public/private distinctions...
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friend class ReducePassList;
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friend class ReduceMisCodegenFunctions;
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public:
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BugDriver(const char *toolname, bool as_child, bool find_bugs,
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unsigned timeout, unsigned memlimit);
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const std::string &getToolName() const { return ToolName; }
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// Set up methods... these methods are used to copy information about the
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// command line arguments into instance variables of BugDriver.
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//
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bool addSources(const std::vector<std::string> &FileNames);
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template<class It>
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void addPasses(It I, It E) { PassesToRun.insert(PassesToRun.end(), I, E); }
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void setPassesToRun(const std::vector<const PassInfo*> &PTR) {
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PassesToRun = PTR;
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}
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const std::vector<const PassInfo*> &getPassesToRun() const {
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return PassesToRun;
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}
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/// run - The top level method that is invoked after all of the instance
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/// variables are set up from command line arguments. The \p as_child argument
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/// indicates whether the driver is to run in parent mode or child mode.
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///
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bool run();
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/// debugOptimizerCrash - This method is called when some optimizer pass
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/// crashes on input. It attempts to prune down the testcase to something
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/// reasonable, and figure out exactly which pass is crashing.
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///
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bool debugOptimizerCrash(const std::string &ID = "passes");
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/// debugCodeGeneratorCrash - This method is called when the code generator
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/// crashes on an input. It attempts to reduce the input as much as possible
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/// while still causing the code generator to crash.
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bool debugCodeGeneratorCrash();
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/// debugMiscompilation - This method is used when the passes selected are not
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/// crashing, but the generated output is semantically different from the
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/// input.
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bool debugMiscompilation();
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/// debugPassMiscompilation - This method is called when the specified pass
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/// miscompiles Program as input. It tries to reduce the testcase to
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/// something that smaller that still miscompiles the program.
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/// ReferenceOutput contains the filename of the file containing the output we
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/// are to match.
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///
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bool debugPassMiscompilation(const PassInfo *ThePass,
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const std::string &ReferenceOutput);
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/// compileSharedObject - This method creates a SharedObject from a given
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/// BitcodeFile for debugging a code generator.
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///
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std::string compileSharedObject(const std::string &BitcodeFile);
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/// debugCodeGenerator - This method narrows down a module to a function or
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/// set of functions, using the CBE as a ``safe'' code generator for other
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/// functions that are not under consideration.
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bool debugCodeGenerator();
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/// isExecutingJIT - Returns true if bugpoint is currently testing the JIT
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///
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bool isExecutingJIT();
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/// runPasses - Run all of the passes in the "PassesToRun" list, discard the
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/// output, and return true if any of the passes crashed.
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bool runPasses(Module *M = 0) {
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if (M == 0) M = Program;
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std::swap(M, Program);
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bool Result = runPasses(PassesToRun);
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std::swap(M, Program);
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return Result;
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}
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Module *getProgram() const { return Program; }
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/// swapProgramIn - Set the current module to the specified module, returning
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/// the old one.
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Module *swapProgramIn(Module *M) {
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Module *OldProgram = Program;
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Program = M;
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return OldProgram;
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}
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AbstractInterpreter *switchToCBE() {
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AbstractInterpreter *Old = Interpreter;
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Interpreter = (AbstractInterpreter*)cbe;
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return Old;
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}
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void switchToInterpreter(AbstractInterpreter *AI) {
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Interpreter = AI;
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}
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/// setNewProgram - If we reduce or update the program somehow, call this
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/// method to update bugdriver with it. This deletes the old module and sets
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/// the specified one as the current program.
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void setNewProgram(Module *M);
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/// compileProgram - Try to compile the specified module, throwing an
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/// exception if an error occurs, or returning normally if not. This is used
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/// for code generation crash testing.
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///
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void compileProgram(Module *M);
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/// executeProgram - This method runs "Program", capturing the output of the
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/// program to a file, returning the filename of the file. A recommended
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/// filename may be optionally specified. If there is a problem with the code
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/// generator (e.g., llc crashes), this will throw an exception.
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///
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std::string executeProgram(std::string RequestedOutputFilename = "",
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std::string Bitcode = "",
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const std::string &SharedObjects = "",
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AbstractInterpreter *AI = 0,
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bool *ProgramExitedNonzero = 0);
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/// executeProgramWithCBE - Used to create reference output with the C
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/// backend, if reference output is not provided. If there is a problem with
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/// the code generator (e.g., llc crashes), this will throw an exception.
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///
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std::string executeProgramWithCBE(std::string OutputFile = "");
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/// createReferenceFile - calls compileProgram and then records the output
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/// into ReferenceOutputFile. Returns true if reference file created, false
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/// otherwise. Note: initializeExecutionEnvironment should be called BEFORE
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/// this function.
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///
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bool createReferenceFile(Module *M, const std::string &Filename
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= "bugpoint.reference.out");
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/// diffProgram - This method executes the specified module and diffs the
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/// output against the file specified by ReferenceOutputFile. If the output
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/// is different, true is returned. If there is a problem with the code
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/// generator (e.g., llc crashes), this will throw an exception.
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///
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bool diffProgram(const std::string &BitcodeFile = "",
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const std::string &SharedObj = "",
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bool RemoveBitcode = false);
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/// EmitProgressBitcode - This function is used to output the current Program
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/// to a file named "bugpoint-ID.bc".
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///
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void EmitProgressBitcode(const std::string &ID, bool NoFlyer = false);
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/// deleteInstructionFromProgram - This method clones the current Program and
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/// deletes the specified instruction from the cloned module. It then runs a
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/// series of cleanup passes (ADCE and SimplifyCFG) to eliminate any code
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/// which depends on the value. The modified module is then returned.
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///
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Module *deleteInstructionFromProgram(const Instruction *I, unsigned Simp)
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const;
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/// performFinalCleanups - This method clones the current Program and performs
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/// a series of cleanups intended to get rid of extra cruft on the module. If
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/// the MayModifySemantics argument is true, then the cleanups is allowed to
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/// modify how the code behaves.
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///
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Module *performFinalCleanups(Module *M, bool MayModifySemantics = false);
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/// ExtractLoop - Given a module, extract up to one loop from it into a new
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/// function. This returns null if there are no extractable loops in the
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/// program or if the loop extractor crashes.
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Module *ExtractLoop(Module *M);
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/// ExtractMappedBlocksFromModule - Extract all but the specified basic blocks
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/// into their own functions. The only detail is that M is actually a module
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/// cloned from the one the BBs are in, so some mapping needs to be performed.
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/// If this operation fails for some reason (ie the implementation is buggy),
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/// this function should return null, otherwise it returns a new Module.
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Module *ExtractMappedBlocksFromModule(const std::vector<BasicBlock*> &BBs,
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Module *M);
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/// runPassesOn - Carefully run the specified set of pass on the specified
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/// module, returning the transformed module on success, or a null pointer on
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/// failure. If AutoDebugCrashes is set to true, then bugpoint will
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/// automatically attempt to track down a crashing pass if one exists, and
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/// this method will never return null.
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Module *runPassesOn(Module *M, const std::vector<const PassInfo*> &Passes,
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bool AutoDebugCrashes = false, unsigned NumExtraArgs = 0,
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const char * const *ExtraArgs = NULL);
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/// runPasses - Run the specified passes on Program, outputting a bitcode
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/// file and writting the filename into OutputFile if successful. If the
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/// optimizations fail for some reason (optimizer crashes), return true,
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/// otherwise return false. If DeleteOutput is set to true, the bitcode is
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/// deleted on success, and the filename string is undefined. This prints to
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/// cout a single line message indicating whether compilation was successful
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/// or failed, unless Quiet is set. ExtraArgs specifies additional arguments
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/// to pass to the child bugpoint instance.
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///
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bool runPasses(const std::vector<const PassInfo*> &PassesToRun,
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std::string &OutputFilename, bool DeleteOutput = false,
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bool Quiet = false, unsigned NumExtraArgs = 0,
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const char * const *ExtraArgs = NULL) const;
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/// runManyPasses - Take the specified pass list and create different
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/// combinations of passes to compile the program with. Compile the program with
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/// each set and mark test to see if it compiled correctly. If the passes
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/// compiled correctly output nothing and rearrange the passes into a new order.
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/// If the passes did not compile correctly, output the command required to
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/// recreate the failure. This returns true if a compiler error is found.
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///
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bool runManyPasses(const std::vector<const PassInfo*> &AllPasses);
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/// writeProgramToFile - This writes the current "Program" to the named
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/// bitcode file. If an error occurs, true is returned.
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///
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bool writeProgramToFile(const std::string &Filename, Module *M = 0) const;
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private:
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/// runPasses - Just like the method above, but this just returns true or
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/// false indicating whether or not the optimizer crashed on the specified
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/// input (true = crashed).
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///
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bool runPasses(const std::vector<const PassInfo*> &PassesToRun,
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bool DeleteOutput = true) const {
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std::string Filename;
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return runPasses(PassesToRun, Filename, DeleteOutput);
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}
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/// runAsChild - The actual "runPasses" guts that runs in a child process.
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int runPassesAsChild(const std::vector<const PassInfo*> &PassesToRun);
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/// initializeExecutionEnvironment - This method is used to set up the
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/// environment for executing LLVM programs.
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///
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bool initializeExecutionEnvironment();
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};
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/// ParseInputFile - Given a bitcode or assembly input filename, parse and
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/// return it, or return null if not possible.
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///
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Module *ParseInputFile(const std::string &InputFilename);
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/// getPassesString - Turn a list of passes into a string which indicates the
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/// command line options that must be passed to add the passes.
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///
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std::string getPassesString(const std::vector<const PassInfo*> &Passes);
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/// PrintFunctionList - prints out list of problematic functions
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///
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void PrintFunctionList(const std::vector<Function*> &Funcs);
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/// PrintGlobalVariableList - prints out list of problematic global variables
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///
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void PrintGlobalVariableList(const std::vector<GlobalVariable*> &GVs);
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// DeleteFunctionBody - "Remove" the function by deleting all of it's basic
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// blocks, making it external.
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//
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void DeleteFunctionBody(Function *F);
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/// SplitFunctionsOutOfModule - Given a module and a list of functions in the
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/// module, split the functions OUT of the specified module, and place them in
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/// the new module.
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Module *SplitFunctionsOutOfModule(Module *M, const std::vector<Function*> &F);
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} // End llvm namespace
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#endif
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