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llvm-6502/tools/bugpoint/OptimizerDriver.cpp
Chandler Carruth 0b8c9a80f2 Move all of the header files which are involved in modelling the LLVM IR
into their new header subdirectory: include/llvm/IR. This matches the
directory structure of lib, and begins to correct a long standing point
of file layout clutter in LLVM.

There are still more header files to move here, but I wanted to handle
them in separate commits to make tracking what files make sense at each
layer easier.

The only really questionable files here are the target intrinsic
tablegen files. But that's a battle I'd rather not fight today.

I've updated both CMake and Makefile build systems (I think, and my
tests think, but I may have missed something).

I've also re-sorted the includes throughout the project. I'll be
committing updates to Clang, DragonEgg, and Polly momentarily.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171366 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-02 11:36:10 +00:00

268 lines
9.2 KiB
C++

//===- 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. :)
//
//===----------------------------------------------------------------------===//
#include "BugDriver.h"
#include "llvm/Analysis/Verifier.h"
#include "llvm/Bitcode/ReaderWriter.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/IR/Module.h"
#include "llvm/PassManager.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/FileUtilities.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/Program.h"
#include "llvm/Support/SystemUtils.h"
#include "llvm/Support/ToolOutputFile.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;
for (unsigned i = 0, e = PluginLoader::getNumPlugins(); i != e; ++i) {
outs() << " -load " << PluginLoader::getPlugin(i);
}
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;
}
sys::Path tool = sys::Program::FindProgramByName("opt");
if (tool.empty()) {
errs() << "Cannot find `opt' in PATH!\n";
return 1;
}
// Ok, everything that could go wrong before running opt is done.
InFile.keep();
// setup the child process' arguments
SmallVector<const char*, 8> Args;
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: " << ErrMsg << "\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;
}