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-rw-r--r--contrib/llvm/tools/bugpoint/OptimizerDriver.cpp260
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diff --git a/contrib/llvm/tools/bugpoint/OptimizerDriver.cpp b/contrib/llvm/tools/bugpoint/OptimizerDriver.cpp
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-//===- OptimizerDriver.cpp - Allow BugPoint to run passes safely ----------===//
-//
-// The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This file defines an interface that allows bugpoint to run various passes
-// without the threat of a buggy pass corrupting bugpoint (of course, bugpoint
-// may have its own bugs, but that's another story...). It achieves this by
-// forking a copy of itself and having the child process do the optimizations.
-// If this client dies, we can always fork a new one. :)
-//
-//===----------------------------------------------------------------------===//
-
-// Note: as a short term hack, the old Unix-specific code and platform-
-// independent code co-exist via conditional compilation until it is verified
-// that the new code works correctly on Unix.
-
-#include "BugDriver.h"
-#include "llvm/Module.h"
-#include "llvm/PassManager.h"
-#include "llvm/Analysis/Verifier.h"
-#include "llvm/Bitcode/ReaderWriter.h"
-#include "llvm/Target/TargetData.h"
-#include "llvm/Support/FileUtilities.h"
-#include "llvm/Support/CommandLine.h"
-#include "llvm/Support/SystemUtils.h"
-#include "llvm/Support/Debug.h"
-#include "llvm/Support/raw_ostream.h"
-#include "llvm/System/Path.h"
-#include "llvm/System/Program.h"
-
-#define DONT_GET_PLUGIN_LOADER_OPTION
-#include "llvm/Support/PluginLoader.h"
-
-#include <fstream>
-using namespace llvm;
-
-namespace llvm {
- extern cl::opt<std::string> OutputPrefix;
-}
-
-namespace {
- // ChildOutput - This option captures the name of the child output file that
- // is set up by the parent bugpoint process
- cl::opt<std::string> ChildOutput("child-output", cl::ReallyHidden);
-}
-
-/// writeProgramToFile - This writes the current "Program" to the named bitcode
-/// file. If an error occurs, true is returned.
-///
-bool BugDriver::writeProgramToFile(const std::string &Filename,
- const Module *M) const {
- std::string ErrInfo;
- tool_output_file Out(Filename.c_str(), ErrInfo,
- raw_fd_ostream::F_Binary);
- if (ErrInfo.empty()) {
- WriteBitcodeToFile(M, Out.os());
- Out.os().close();
- if (!Out.os().has_error()) {
- Out.keep();
- return false;
- }
- }
- Out.os().clear_error();
- return true;
-}
-
-
-/// EmitProgressBitcode - This function is used to output the current Program
-/// to a file named "bugpoint-ID.bc".
-///
-void BugDriver::EmitProgressBitcode(const Module *M,
- const std::string &ID,
- bool NoFlyer) const {
- // Output the input to the current pass to a bitcode file, emit a message
- // telling the user how to reproduce it: opt -foo blah.bc
- //
- std::string Filename = OutputPrefix + "-" + ID + ".bc";
- if (writeProgramToFile(Filename, M)) {
- errs() << "Error opening file '" << Filename << "' for writing!\n";
- return;
- }
-
- outs() << "Emitted bitcode to '" << Filename << "'\n";
- if (NoFlyer || PassesToRun.empty()) return;
- outs() << "\n*** You can reproduce the problem with: ";
- if (UseValgrind) outs() << "valgrind ";
- outs() << "opt " << Filename << " ";
- outs() << getPassesString(PassesToRun) << "\n";
-}
-
-cl::opt<bool> SilencePasses("silence-passes", cl::desc("Suppress output of running passes (both stdout and stderr)"));
-
-static cl::list<std::string> OptArgs("opt-args", cl::Positional,
- cl::desc("<opt arguments>..."),
- cl::ZeroOrMore, cl::PositionalEatsArgs);
-
-/// runPasses - Run the specified passes on Program, outputting a bitcode file
-/// and writing 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.
-///
-bool BugDriver::runPasses(Module *Program,
- const std::vector<std::string> &Passes,
- std::string &OutputFilename, bool DeleteOutput,
- bool Quiet, unsigned NumExtraArgs,
- const char * const *ExtraArgs) const {
- // setup the output file name
- outs().flush();
- sys::Path uniqueFilename(OutputPrefix + "-output.bc");
- std::string ErrMsg;
- if (uniqueFilename.makeUnique(true, &ErrMsg)) {
- errs() << getToolName() << ": Error making unique filename: "
- << ErrMsg << "\n";
- return(1);
- }
- OutputFilename = uniqueFilename.str();
-
- // set up the input file name
- sys::Path inputFilename(OutputPrefix + "-input.bc");
- if (inputFilename.makeUnique(true, &ErrMsg)) {
- errs() << getToolName() << ": Error making unique filename: "
- << ErrMsg << "\n";
- return(1);
- }
-
- std::string ErrInfo;
- tool_output_file InFile(inputFilename.c_str(), ErrInfo,
- raw_fd_ostream::F_Binary);
-
-
- if (!ErrInfo.empty()) {
- errs() << "Error opening bitcode file: " << inputFilename.str() << "\n";
- return 1;
- }
- WriteBitcodeToFile(Program, InFile.os());
- InFile.os().close();
- if (InFile.os().has_error()) {
- errs() << "Error writing bitcode file: " << inputFilename.str() << "\n";
- InFile.os().clear_error();
- return 1;
- }
- InFile.keep();
-
- // setup the child process' arguments
- SmallVector<const char*, 8> Args;
- sys::Path tool = FindExecutable("opt", getToolName(), (void*)"opt");
- std::string Opt = tool.str();
- if (UseValgrind) {
- Args.push_back("valgrind");
- Args.push_back("--error-exitcode=1");
- Args.push_back("-q");
- Args.push_back(tool.c_str());
- } else
- Args.push_back(Opt.c_str());
-
- Args.push_back("-o");
- Args.push_back(OutputFilename.c_str());
- for (unsigned i = 0, e = OptArgs.size(); i != e; ++i)
- Args.push_back(OptArgs[i].c_str());
- std::vector<std::string> pass_args;
- for (unsigned i = 0, e = PluginLoader::getNumPlugins(); i != e; ++i) {
- pass_args.push_back( std::string("-load"));
- pass_args.push_back( PluginLoader::getPlugin(i));
- }
- for (std::vector<std::string>::const_iterator I = Passes.begin(),
- E = Passes.end(); I != E; ++I )
- pass_args.push_back( std::string("-") + (*I) );
- for (std::vector<std::string>::const_iterator I = pass_args.begin(),
- E = pass_args.end(); I != E; ++I )
- Args.push_back(I->c_str());
- Args.push_back(inputFilename.c_str());
- for (unsigned i = 0; i < NumExtraArgs; ++i)
- Args.push_back(*ExtraArgs);
- Args.push_back(0);
-
- DEBUG(errs() << "\nAbout to run:\t";
- for (unsigned i = 0, e = Args.size()-1; i != e; ++i)
- errs() << " " << Args[i];
- errs() << "\n";
- );
-
- sys::Path prog;
- if (UseValgrind)
- prog = sys::Program::FindProgramByName("valgrind");
- else
- prog = tool;
-
- // Redirect stdout and stderr to nowhere if SilencePasses is given
- sys::Path Nowhere;
- const sys::Path *Redirects[3] = {0, &Nowhere, &Nowhere};
-
- int result = sys::Program::ExecuteAndWait(prog, Args.data(), 0,
- (SilencePasses ? Redirects : 0),
- Timeout, MemoryLimit, &ErrMsg);
-
- // If we are supposed to delete the bitcode file or if the passes crashed,
- // remove it now. This may fail if the file was never created, but that's ok.
- if (DeleteOutput || result != 0)
- sys::Path(OutputFilename).eraseFromDisk();
-
- // Remove the temporary input file as well
- inputFilename.eraseFromDisk();
-
- if (!Quiet) {
- if (result == 0)
- outs() << "Success!\n";
- else if (result > 0)
- outs() << "Exited with error code '" << result << "'\n";
- else if (result < 0) {
- if (result == -1)
- outs() << "Execute failed: " << ErrMsg << "\n";
- else
- outs() << "Crashed with signal #" << abs(result) << "\n";
- }
- if (result & 0x01000000)
- outs() << "Dumped core\n";
- }
-
- // Was the child successful?
- return result != 0;
-}
-
-
-/// runPassesOn - Carefully run the specified set of pass on the specified
-/// module, returning the transformed module on success, or a null pointer on
-/// failure.
-Module *BugDriver::runPassesOn(Module *M,
- const std::vector<std::string> &Passes,
- bool AutoDebugCrashes, unsigned NumExtraArgs,
- const char * const *ExtraArgs) {
- std::string BitcodeResult;
- if (runPasses(M, Passes, BitcodeResult, false/*delete*/, true/*quiet*/,
- NumExtraArgs, ExtraArgs)) {
- if (AutoDebugCrashes) {
- errs() << " Error running this sequence of passes"
- << " on the input program!\n";
- delete swapProgramIn(M);
- EmitProgressBitcode(M, "pass-error", false);
- exit(debugOptimizerCrash());
- }
- return 0;
- }
-
- Module *Ret = ParseInputFile(BitcodeResult, Context);
- if (Ret == 0) {
- errs() << getToolName() << ": Error reading bitcode file '"
- << BitcodeResult << "'!\n";
- exit(1);
- }
- sys::Path(BitcodeResult).eraseFromDisk(); // No longer need the file on disk
- return Ret;
-}
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