319 lines
13 KiB
C++
319 lines
13 KiB
C++
//===- BugDriver.h - Top-Level BugPoint class -------------------*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This class contains all of the shared state and information that is used by
|
|
// the BugPoint tool to track down errors in optimizations. This class is the
|
|
// main driver class that invokes all sub-functionality.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_TOOLS_BUGPOINT_BUGDRIVER_H
|
|
#define LLVM_TOOLS_BUGPOINT_BUGDRIVER_H
|
|
|
|
#include "llvm/IR/ValueMap.h"
|
|
#include "llvm/Support/Error.h"
|
|
#include "llvm/Transforms/Utils/ValueMapper.h"
|
|
#include <memory>
|
|
#include <string>
|
|
#include <vector>
|
|
|
|
namespace llvm {
|
|
|
|
class Value;
|
|
class PassInfo;
|
|
class Module;
|
|
class GlobalVariable;
|
|
class Function;
|
|
class BasicBlock;
|
|
class AbstractInterpreter;
|
|
class Instruction;
|
|
class LLVMContext;
|
|
|
|
class DebugCrashes;
|
|
|
|
class CC;
|
|
|
|
extern bool DisableSimplifyCFG;
|
|
|
|
/// BugpointIsInterrupted - Set to true when the user presses ctrl-c.
|
|
///
|
|
extern bool BugpointIsInterrupted;
|
|
|
|
class BugDriver {
|
|
LLVMContext &Context;
|
|
const char *ToolName; // argv[0] of bugpoint
|
|
std::string ReferenceOutputFile; // Name of `good' output file
|
|
Module *Program; // The raw program, linked together
|
|
std::vector<std::string> PassesToRun;
|
|
AbstractInterpreter *Interpreter; // How to run the program
|
|
AbstractInterpreter *SafeInterpreter; // To generate reference output, etc.
|
|
CC *cc;
|
|
bool run_find_bugs;
|
|
unsigned Timeout;
|
|
unsigned MemoryLimit;
|
|
bool UseValgrind;
|
|
|
|
// FIXME: sort out public/private distinctions...
|
|
friend class ReducePassList;
|
|
friend class ReduceMisCodegenFunctions;
|
|
|
|
public:
|
|
BugDriver(const char *toolname, bool find_bugs, unsigned timeout,
|
|
unsigned memlimit, bool use_valgrind, LLVMContext &ctxt);
|
|
~BugDriver();
|
|
|
|
const char *getToolName() const { return ToolName; }
|
|
|
|
LLVMContext &getContext() const { return Context; }
|
|
|
|
// Set up methods... these methods are used to copy information about the
|
|
// command line arguments into instance variables of BugDriver.
|
|
//
|
|
bool addSources(const std::vector<std::string> &FileNames);
|
|
void addPass(std::string p) { PassesToRun.push_back(std::move(p)); }
|
|
void setPassesToRun(const std::vector<std::string> &PTR) {
|
|
PassesToRun = PTR;
|
|
}
|
|
const std::vector<std::string> &getPassesToRun() const { return PassesToRun; }
|
|
|
|
/// run - The top level method that is invoked after all of the instance
|
|
/// variables are set up from command line arguments. The \p as_child argument
|
|
/// indicates whether the driver is to run in parent mode or child mode.
|
|
///
|
|
Error run();
|
|
|
|
/// debugOptimizerCrash - This method is called when some optimizer pass
|
|
/// crashes on input. It attempts to prune down the testcase to something
|
|
/// reasonable, and figure out exactly which pass is crashing.
|
|
///
|
|
Error debugOptimizerCrash(const std::string &ID = "passes");
|
|
|
|
/// debugCodeGeneratorCrash - This method is called when the code generator
|
|
/// crashes on an input. It attempts to reduce the input as much as possible
|
|
/// while still causing the code generator to crash.
|
|
Error debugCodeGeneratorCrash();
|
|
|
|
/// debugMiscompilation - This method is used when the passes selected are not
|
|
/// crashing, but the generated output is semantically different from the
|
|
/// input.
|
|
Error debugMiscompilation();
|
|
|
|
/// debugPassMiscompilation - This method is called when the specified pass
|
|
/// miscompiles Program as input. It tries to reduce the testcase to
|
|
/// something that smaller that still miscompiles the program.
|
|
/// ReferenceOutput contains the filename of the file containing the output we
|
|
/// are to match.
|
|
///
|
|
bool debugPassMiscompilation(const PassInfo *ThePass,
|
|
const std::string &ReferenceOutput);
|
|
|
|
/// compileSharedObject - This method creates a SharedObject from a given
|
|
/// BitcodeFile for debugging a code generator.
|
|
///
|
|
Expected<std::string> compileSharedObject(const std::string &BitcodeFile);
|
|
|
|
/// debugCodeGenerator - This method narrows down a module to a function or
|
|
/// set of functions, using the CBE as a ``safe'' code generator for other
|
|
/// functions that are not under consideration.
|
|
Error debugCodeGenerator();
|
|
|
|
/// isExecutingJIT - Returns true if bugpoint is currently testing the JIT
|
|
///
|
|
bool isExecutingJIT();
|
|
|
|
Module *getProgram() const { return Program; }
|
|
|
|
/// swapProgramIn - Set the current module to the specified module, returning
|
|
/// the old one.
|
|
Module *swapProgramIn(Module *M) {
|
|
Module *OldProgram = Program;
|
|
Program = M;
|
|
return OldProgram;
|
|
}
|
|
|
|
AbstractInterpreter *switchToSafeInterpreter() {
|
|
AbstractInterpreter *Old = Interpreter;
|
|
Interpreter = (AbstractInterpreter *)SafeInterpreter;
|
|
return Old;
|
|
}
|
|
|
|
void switchToInterpreter(AbstractInterpreter *AI) { Interpreter = AI; }
|
|
|
|
/// setNewProgram - If we reduce or update the program somehow, call this
|
|
/// method to update bugdriver with it. This deletes the old module and sets
|
|
/// the specified one as the current program.
|
|
void setNewProgram(Module *M);
|
|
|
|
/// Try to compile the specified module. This is used for code generation
|
|
/// crash testing.
|
|
Error compileProgram(Module *M) const;
|
|
|
|
/// executeProgram - This method runs "Program", capturing the output of the
|
|
/// program to a file. A recommended filename may be optionally specified.
|
|
///
|
|
Expected<std::string> executeProgram(const Module *Program,
|
|
std::string OutputFilename,
|
|
std::string Bitcode,
|
|
const std::string &SharedObjects,
|
|
AbstractInterpreter *AI) const;
|
|
|
|
/// executeProgramSafely - Used to create reference output with the "safe"
|
|
/// backend, if reference output is not provided. If there is a problem with
|
|
/// the code generator (e.g., llc crashes), this will return false and set
|
|
/// Error.
|
|
///
|
|
Expected<std::string>
|
|
executeProgramSafely(const Module *Program,
|
|
const std::string &OutputFile) const;
|
|
|
|
/// createReferenceFile - calls compileProgram and then records the output
|
|
/// into ReferenceOutputFile. Returns true if reference file created, false
|
|
/// otherwise. Note: initializeExecutionEnvironment should be called BEFORE
|
|
/// this function.
|
|
///
|
|
Error createReferenceFile(Module *M, const std::string &Filename =
|
|
"bugpoint.reference.out-%%%%%%%");
|
|
|
|
/// diffProgram - This method executes the specified module and diffs the
|
|
/// output against the file specified by ReferenceOutputFile. If the output
|
|
/// is different, 1 is returned. If there is a problem with the code
|
|
/// generator (e.g., llc crashes), this will return -1 and set Error.
|
|
///
|
|
Expected<bool> diffProgram(const Module *Program,
|
|
const std::string &BitcodeFile = "",
|
|
const std::string &SharedObj = "",
|
|
bool RemoveBitcode = false) const;
|
|
|
|
/// EmitProgressBitcode - This function is used to output M to a file named
|
|
/// "bugpoint-ID.bc".
|
|
///
|
|
void EmitProgressBitcode(const Module *M, const std::string &ID,
|
|
bool NoFlyer = false) const;
|
|
|
|
/// This method clones the current Program and deletes the specified
|
|
/// instruction from the cloned module. It then runs a series of cleanup
|
|
/// passes (ADCE and SimplifyCFG) to eliminate any code which depends on the
|
|
/// value. The modified module is then returned.
|
|
///
|
|
std::unique_ptr<Module> deleteInstructionFromProgram(const Instruction *I,
|
|
unsigned Simp);
|
|
|
|
/// This method clones the current Program and performs a series of cleanups
|
|
/// intended to get rid of extra cruft on the module. If the
|
|
/// MayModifySemantics argument is true, then the cleanups is allowed to
|
|
/// modify how the code behaves.
|
|
///
|
|
std::unique_ptr<Module> performFinalCleanups(Module *M,
|
|
bool MayModifySemantics = false);
|
|
|
|
/// Given a module, extract up to one loop from it into a new function. This
|
|
/// returns null if there are no extractable loops in the program or if the
|
|
/// loop extractor crashes.
|
|
std::unique_ptr<Module> extractLoop(Module *M);
|
|
|
|
/// Extract all but the specified basic blocks into their own functions. The
|
|
/// only detail is that M is actually a module cloned from the one the BBs are
|
|
/// in, so some mapping needs to be performed. If this operation fails for
|
|
/// some reason (ie the implementation is buggy), this function should return
|
|
/// null, otherwise it returns a new Module.
|
|
std::unique_ptr<Module>
|
|
extractMappedBlocksFromModule(const std::vector<BasicBlock *> &BBs,
|
|
Module *M);
|
|
|
|
/// Carefully run the specified set of pass on the specified/ module,
|
|
/// returning the transformed module on success, or a null pointer on failure.
|
|
std::unique_ptr<Module> runPassesOn(Module *M,
|
|
const std::vector<std::string> &Passes,
|
|
unsigned NumExtraArgs = 0,
|
|
const char *const *ExtraArgs = nullptr);
|
|
|
|
/// runPasses - Run the specified passes on Program, outputting a bitcode
|
|
/// file and writting the filename into OutputFile if successful. If the
|
|
/// optimizations fail for some reason (optimizer crashes), return true,
|
|
/// otherwise return false. If DeleteOutput is set to true, the bitcode is
|
|
/// deleted on success, and the filename string is undefined. This prints to
|
|
/// outs() a single line message indicating whether compilation was successful
|
|
/// or failed, unless Quiet is set. ExtraArgs specifies additional arguments
|
|
/// to pass to the child bugpoint instance.
|
|
///
|
|
bool runPasses(Module *Program, const std::vector<std::string> &PassesToRun,
|
|
std::string &OutputFilename, bool DeleteOutput = false,
|
|
bool Quiet = false, unsigned NumExtraArgs = 0,
|
|
const char *const *ExtraArgs = nullptr) const;
|
|
|
|
/// runPasses - Just like the method above, but this just returns true or
|
|
/// false indicating whether or not the optimizer crashed on the specified
|
|
/// input (true = crashed). Does not produce any output.
|
|
///
|
|
bool runPasses(Module *M, const std::vector<std::string> &PassesToRun) const {
|
|
std::string Filename;
|
|
return runPasses(M, PassesToRun, Filename, true);
|
|
}
|
|
|
|
/// Take the specified pass list and create different combinations of passes
|
|
/// to compile the program with. Compile the program with each set and mark
|
|
/// test to see if it compiled correctly. If the passes compiled correctly
|
|
/// output nothing and rearrange the passes into a new order. If the passes
|
|
/// did not compile correctly, output the command required to recreate the
|
|
/// failure.
|
|
Error runManyPasses(const std::vector<std::string> &AllPasses);
|
|
|
|
/// writeProgramToFile - This writes the current "Program" to the named
|
|
/// bitcode file. If an error occurs, true is returned.
|
|
///
|
|
bool writeProgramToFile(const std::string &Filename, const Module *M) const;
|
|
bool writeProgramToFile(const std::string &Filename, int FD,
|
|
const Module *M) const;
|
|
|
|
private:
|
|
/// initializeExecutionEnvironment - This method is used to set up the
|
|
/// environment for executing LLVM programs.
|
|
///
|
|
Error initializeExecutionEnvironment();
|
|
};
|
|
|
|
/// Given a bitcode or assembly input filename, parse and return it, or return
|
|
/// null if not possible.
|
|
///
|
|
std::unique_ptr<Module> parseInputFile(StringRef InputFilename,
|
|
LLVMContext &ctxt);
|
|
|
|
/// getPassesString - Turn a list of passes into a string which indicates the
|
|
/// command line options that must be passed to add the passes.
|
|
///
|
|
std::string getPassesString(const std::vector<std::string> &Passes);
|
|
|
|
/// PrintFunctionList - prints out list of problematic functions
|
|
///
|
|
void PrintFunctionList(const std::vector<Function *> &Funcs);
|
|
|
|
/// PrintGlobalVariableList - prints out list of problematic global variables
|
|
///
|
|
void PrintGlobalVariableList(const std::vector<GlobalVariable *> &GVs);
|
|
|
|
// DeleteGlobalInitializer - "Remove" the global variable by deleting its
|
|
// initializer, making it external.
|
|
//
|
|
void DeleteGlobalInitializer(GlobalVariable *GV);
|
|
|
|
// DeleteFunctionBody - "Remove" the function by deleting all of it's basic
|
|
// blocks, making it external.
|
|
//
|
|
void DeleteFunctionBody(Function *F);
|
|
|
|
/// Given a module and a list of functions in the module, split the functions
|
|
/// OUT of the specified module, and place them in the new module.
|
|
std::unique_ptr<Module>
|
|
SplitFunctionsOutOfModule(Module *M, const std::vector<Function *> &F,
|
|
ValueToValueMapTy &VMap);
|
|
|
|
} // End llvm namespace
|
|
|
|
#endif
|