+++ /dev/null
-# Bugpoint Redesign
-Author: Diego Treviño (diegotf@google.com)
-
-Date: 2019-06-05
-
-Status: Draft
-
-
-## Introduction
-As use of bugpoint has grown several areas of improvement have been identified
-through years of use: confusing to use, slow, it doesn’t always produce high
-quality test cases, etc. This document proposes a new approach with a narrower
-focus: minimization of IR test cases.
-
-
-## Proposed New Design
-
-
-### Narrow focus: test-case reduction
-The main focus will be a code reduction strategy to obtain much smaller test
-cases that still have the same property as the original one. This will be done
-via classic delta debugging and by adding some IR-specific reductions (e.g.
-replacing globals, removing unused instructions, etc), similar to what
-already exists, but with more in-depth minimization.
-
-
-Granted, if the community differs on this proposal, the legacy code could still
-be present in the tool, but with the caveat of still being documented and
-designed towards delta reduction.
-
-
-### Command-Line Options
-We are proposing to reduce the plethora of bugpoint’s options to just two: an
-interesting-ness test and the arguments for said test, similar to other delta
-reduction tools such as CReduce, Delta, and Lithium; the tool should feel less
- cluttered, and there should also be no uncertainty about how to operate it.
-
-
-The interesting-ness test that’s going to be run to reduce the code is given
-by name:
- `--test=<test_name>`
-If a `--test` option is not given, the program exits; this option is similar
-to bugpoint’s current `-compile-custom` option, which lets the user run a
-custom script.
-
-
-The interesting-ness test would be defined as a script that returns 0 when the
-IR achieves a user-defined behaviour (e.g. failure to compile on clang) and a
-nonzero value when otherwise. Leaving the user the freedom to determine what is
-and isn’t interesting to the tool, and thus, streamlining the process of
-reducing a test-case.
-
-
-If the test accepts any arguments (excluding the input ll/bc file), they are
-given via the following flag:
- `--test_args=<test_arguments>`
-If unspecified, the test is run as given. It’s worth noting that the input file
-would be passed as a parameter to the test, similar how `-compile-custom`
-currently operates.
-
-
-### Implementation
-The tool would behave similar to CReduce’s functionality in that it would have a
-list of passes that try to minimize the given test-case. We should be able to
-modularize the tool’s behavior, as well as making it easier to maintain and
-expand.
-
-
-The first version of this redesign would try to:
-
-
-* Split the code into chunks and discard those that fail the given test
-* Discard functions, instructions and metadata that don’t influence the
- interesting-ness test
-* Remove unused parameters from functions
-* Eliminate unvisited conditional paths
-* Rename variables to more regular ones (such as “a”, “b”, “c”, etc.)
-
-
-Once these passes are implemented, more meaningful reductions (such as type
-reduction) would be added to the tool, to even further reduce IR.
-
-
-## Background on historical bugpoint issues
-
-
-### Root Cause Analysis
-Presently, bugpoint takes a long time to find the source problem in a given IR
-file, mainly due to the fact that it tries to debug the input by running
-various strategies to classify the bug, which in turn run multiple optimizer
-and compilation passes over the input, taking up a lot of time. Furthermore,
-when the IR crashes, it tries to reduce it by performing some sub-optimal
-passes (e.g. a lot of unreachable blocks), and sometimes even fails to minimize
-at all.
-
-
-### "Quirky" Interface
-Bugpoint’s current interface overwhelms and confuses the user, the help screen
-alone ends up confusing rather providing guidance, as seen below:
-
-
-
-And, not only are there numerous features and options, but some of them also
-work in unexpected ways and most of the time the user ends up using a custom
-script. Pruning and simplifying the interface will be worth considering in
-order to make the tool more useful in the general case and easier to maintain.
+++ /dev/null
-#!/bin/sh
-
-# lli is passed as a test-arg so lit can recognize it
-ret=$($2 $1)
-
-if [[ $ret = 10 ]]; then
- exit 0
-else
- exit 1
-fi
+++ /dev/null
-; Test that llvm-reduce can remove uninteresting functions as well as
-; their InstCalls.
-;
-; RUN: llvm-reduce --test %p/Inputs/remove-funcs.sh --test-arg %lli %s
-; RUN: cat reduced.ll | FileCheck %s
-; REQUIRES: plugins, shell
-
-@.str = private unnamed_addr constant [4 x i8] c"%i\0A\00", align 1
-
-; CHECK-NOT: uninteresting1()
-define i32 @uninteresting1() {
-entry:
- ret i32 25
-}
-
-; CHECK: interesting()
-define i32 @interesting() {
-entry:
- ret i32 10
-}
-
-; CHECK-NOT: uninteresting2()
-define i32 @uninteresting2() {
-entry:
- ret i32 2000
-}
-
-; CHECK: main()
-define i32 @main() {
-entry:
- %retval = alloca i32, align 4
- %number = alloca i32, align 4
- store i32 0, i32* %retval, align 4
- store i32 0, i32* %number, align 4
- ; CHECK-NOT: %call = call i32 @uninteresting1()
- %call = call i32 @uninteresting1()
- ; CHECK: %call1 = call i32 @interesting()
- %call1 = call i32 @interesting()
- store i32 %call1, i32* %number, align 4
- %0 = load i32, i32* %number, align 4
- %call2 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 %0)
- ; CHECK-NOT: %call3 = call i32 @uninteresting1()
- %call3 = call i32 @uninteresting1()
- ; CHECK-NOT: %call4 = call i32 @uninteresting2()
- %call4 = call i32 @uninteresting2()
- ret i32 0
-}
-
-declare i32 @printf(i8*, ...)
llvm-pdbutil
llvm-profdata
llvm-rc
- llvm-reduce
llvm-rtdyld
llvm-size
llvm-split
+++ /dev/null
-set(LLVM_LINK_COMPONENTS
- AllTargetsAsmParsers
- AllTargetsCodeGens
- AllTargetsDescs
- AllTargetsInfos
- IRReader
- Support
- Target
- TransformUtils
- )
-
-# Support plugins.
-set(LLVM_NO_DEAD_STRIP 1)
-
-add_llvm_tool(llvm-reduce
- llvm-reduce.cpp
- TestRunner.cpp
- deltas/RemoveFunctions.cpp
-
- DEPENDS
- intrinsics_gen
- )
-export_executable_symbols(llvm-reduce)
+++ /dev/null
-//===- llvm-reduce.cpp - The LLVM Delta Reduction utility -----------------===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-//
-// This class calls each specialized Delta pass by passing it as a template to
-// the generic Delta Pass.
-//
-//===----------------------------------------------------------------------===//
-
-#include "TestRunner.h"
-#include "deltas/Delta.h"
-#include "deltas/RemoveFunctions.h"
-
-namespace llvm {
-
-inline void runDeltaPasses(TestRunner &Tester) {
- outs() << "Reducing functions...\n";
- Delta<RemoveFunctions>::run(Tester);
- // TODO: Implement the rest of the Delta Passes
-}
-
-} // namespace llvm
+++ /dev/null
-;===- ./tools/llvm-reduce/LLVMBuild.txt ------------------------*- Conf -*--===;
-;
-; Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-; See https://llvm.org/LICENSE.txt for license information.
-; SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-;
-;===------------------------------------------------------------------------===;
-;
-; This is an LLVMBuild description file for the components in this subdirectory.
-;
-; For more information on the LLVMBuild system, please see:
-;
-; http://llvm.org/docs/LLVMBuild.html
-;
-;===------------------------------------------------------------------------===;
-
-[component_0]
-type = Tool
-name = llvm-reduce
-parent = Tools
-required_libraries =
- BitReader
- IRReader
- all-targets
+++ /dev/null
-#include "TestRunner.h"
-
-using namespace llvm;
-
-TestRunner::TestRunner(StringRef TestName, std::vector<std::string> TestArgs,
- StringRef ReducedFilepath, SmallString<128> TmpDirectory)
- : TestName(TestName), TestArgs(TestArgs), ReducedFilepath(ReducedFilepath),
- TmpDirectory(TmpDirectory) {}
-
-/// Runs the interestingness test, passes file to be tested as first argument
-/// and other specified test arguments after that.
-int TestRunner::run(StringRef Filename) {
- std::vector<StringRef> ProgramArgs;
- ProgramArgs.push_back(TestName);
- ProgramArgs.push_back(Filename);
-
- for (unsigned I = 0, E = TestArgs.size(); I != E; ++I)
- ProgramArgs.push_back(TestArgs[I].c_str());
-
- StringRef SR = "";
- Optional<StringRef> Redirects[3] = {SR, SR, SR}; // STDIN, STDOUT, STDERR
- int Result = sys::ExecuteAndWait(TestName, ProgramArgs, None, Redirects);
-
- if (Result < 0) {
- Error E = make_error<StringError>("Error running interesting-ness test\n",
- inconvertibleErrorCode());
- outs() << toString(std::move(E));
- exit(1);
- }
-
- return !Result;
-}
+++ /dev/null
-//===- llvm-reduce.cpp - The LLVM Delta Reduction utility -----------------===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef LLVM_TOOLS_LLVMREDUCE_TESTRUNNER_H
-#define LLVM_TOOLS_LLVMREDUCE_TESTRUNNER_H
-
-#include "llvm/ADT/SmallString.h"
-#include "llvm/IR/Module.h"
-#include "llvm/Support/Error.h"
-#include "llvm/Support/Program.h"
-#include <vector>
-
-namespace llvm {
-
-// This class contains all the info necessary for running the provided
-// interesting-ness test, as well as the most reduced module and its
-// respective filename.
-class TestRunner {
-public:
- TestRunner(StringRef TestName, std::vector<std::string> TestArgs,
- StringRef ReducedFilepath, SmallString<128> TmpDirectory);
-
- /// Runs the interesting-ness test for the specified file
- /// @returns 0 if test was successful, 1 if otherwise
- int run(StringRef Filename);
-
- /// Filename to the most reduced testcase
- StringRef getReducedFilepath() const { return ReducedFilepath; }
- /// Directory where tmp files are created
- StringRef getTmpDir() const { return TmpDirectory; }
- /// Returns the most reduced version of the original testcase
- Module *getProgram() const { return Program.get(); }
-
- void setReducedFilepath(SmallString<128> F) { ReducedFilepath = F; }
- void setProgram(std::unique_ptr<Module> P) { Program = std::move(P); }
-
-private:
- SmallString<128> TestName;
- std::vector<std::string> TestArgs;
- SmallString<128> ReducedFilepath;
- SmallString<128> TmpDirectory;
- std::unique_ptr<Module> Program;
-};
-
-} // namespace llvm
-
-#endif
+++ /dev/null
-//===- llvm-reduce.cpp - The LLVM Delta Reduction utility -----------------===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-//
-// This file contains the implementation for the Delta Debugging Algorithm:
-// it splits a given set of Targets (i.e. Functions, Instructions, BBs, etc.)
-// into chunks and tries to reduce the number chunks that are interesting.
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef LLVM_TOOLS_LLVMREDUCE_LLVMREDUCE_DELTA_H
-#define LLVM_TOOLS_LLVMREDUCE_LLVMREDUCE_DELTA_H
-
-#include "../TestRunner.h"
-#include "llvm/Support/FileSystem.h"
-#include "llvm/Support/Path.h"
-#include "llvm/Support/ScopedPrinter.h"
-#include "llvm/Support/ToolOutputFile.h"
-#include <fstream>
-#include <set>
-#include <vector>
-
-using namespace llvm;
-
-struct Chunk {
- int begin;
- int end;
-
- /// Operator when populating CurrentChunks in Generic Delta Pass
- friend bool operator!=(const Chunk &C1, const Chunk &C2) {
- return C1.begin != C2.begin && C1.end != C2.end;
- }
-
- /// Operator used for sets
- friend bool operator<(const Chunk &C1, const Chunk &C2) {
- return C1.begin < C2.begin;
- }
-};
-
-/// Writes IR code to the given Filepath
-inline bool writeProgramToFile(StringRef Filepath, int FD, const Module &M) {
- ToolOutputFile Out(Filepath, FD);
- M.print(Out.os(), /*AnnotationWriter=*/nullptr);
- Out.os().close();
-
- if (!Out.os().has_error()) {
- Out.keep();
- return false;
- }
- return true;
-}
-
-/// Creates a temporary (and unique) file inside the tmp folder and outputs
-/// the module inside it.
-inline SmallString<128> createTmpFile(Module *M, StringRef TmpDir) {
- SmallString<128> UniqueFilepath;
- int UniqueFD;
-
- std::error_code EC = sys::fs::createUniqueFile(TmpDir + "/tmp-%%%.ll",
- UniqueFD, UniqueFilepath);
- if (EC) {
- errs() << "Error making unique filename: " << EC.message() << "!\n";
- exit(1);
- }
-
- if (writeProgramToFile(UniqueFilepath, UniqueFD, *M)) {
- errs() << "Error emitting bitcode to file '" << UniqueFilepath << "'!\n";
- exit(1);
- }
- return UniqueFilepath;
-}
-
-/// Prints the Chunk Indexes with the following format: [start, end], if
-/// chunk is at minimum size (1), then it just displays [start].
-inline void printChunks(std::vector<Chunk> Chunks, bool Oneline = false) {
- for (auto C : Chunks) {
- if (!Oneline)
- outs() << '\t';
- outs() << "[" << C.begin;
- if (C.end - C.begin != 0)
- outs() << "," << C.end;
- outs() << "]";
- if (!Oneline)
- outs() << '\n';
- }
-}
-
-/// Counts the amount of lines for a given file
-inline unsigned getLines(StringRef Filepath) {
- unsigned Lines = 0;
- std::string CurrLine;
- std::ifstream FileStream(Filepath);
-
- while (std::getline(FileStream, CurrLine))
- ++Lines;
-
- return Lines;
-}
-
-/// Splits Chunks in half and prints them.
-/// If unable to split (when chunk size is 1) returns false.
-inline bool increaseGranularity(std::vector<Chunk> &Chunks) {
- outs() << "Increasing granularity...";
- std::vector<Chunk> NewChunks;
- bool SplitOne = false;
-
- for (auto &C : Chunks) {
- if (C.end - C.begin == 0)
- NewChunks.push_back(C);
- else {
- int Half = (C.begin + C.end) / 2;
- NewChunks.push_back({C.begin, Half});
- NewChunks.push_back({Half + 1, C.end});
- SplitOne = true;
- }
- }
- if (SplitOne) {
- Chunks = NewChunks;
- outs() << "Success! New Chunks:\n";
- printChunks(Chunks);
- }
- return SplitOne;
-}
-
-namespace llvm {
-
-/// This class implements the Delta Debugging algorithm, it receives a set of
-/// Targets (e.g. Functions, Instructions, Basic Blocks, etc.) and splits them
-/// in half; these chunks of targets are then tested while ignoring one chunk,
-/// if a chunk is proven to be uninteresting (i.e. fails the test) it is
-/// removed from consideration. Otherwise, the algorithm will attempt to split
-/// the Chunks in half and start the process again, until it can't split chunks
-/// anymore.
-///
-/// The class is intended to be called statically by the DeltaManager class
-/// alongside a specialized delta pass (e.g. RemoveFunctions) passed as a
-/// template.
-/// This specialized pass implements two functions:
-/// * getTargetCount, which returns the amount of targets (e.g. Functions)
-/// there are in the Module.
-/// * extractChunksFromModule, which clones the given Module and modifies it
-/// so it only contains Chunk Targets.
-///
-/// Other implementations of the Delta Debugging algorithm can be found in the
-/// CReduce, Delta, and Lithium projects.
-template <class P> class Delta {
-public:
- /// Runs the Delta Debugging algorithm, splits the code into chunks and
- /// reduces the amount of chunks that are considered interesting by the
- /// given test.
- static void run(TestRunner &Test) {
- int TargetCount = P::getTargetCount(Test.getProgram());
- std::vector<Chunk> Chunks = {{1, TargetCount}};
- std::set<Chunk> UninterestingChunks;
- std::unique_ptr<Module> ReducedProgram;
-
- if (Test.run(Test.getReducedFilepath()))
- increaseGranularity(Chunks);
- else {
- outs() << "Error: input file isnt interesting\n";
- exit(1);
- }
-
- do {
- UninterestingChunks = {};
- for (int I = Chunks.size() - 1; I >= 0; --I) {
- std::vector<Chunk> CurrentChunks;
-
- for (auto C : Chunks)
- if (!UninterestingChunks.count(C) && C != Chunks[I])
- CurrentChunks.push_back(C);
-
- // Generate Module with only Targets inside Current Chunks
- std::unique_ptr<Module> CurrentProgram =
- P::extractChunksFromModule(CurrentChunks, Test.getProgram());
- // Write Module to tmp file
- SmallString<128> CurrentFilepath =
- createTmpFile(CurrentProgram.get(), Test.getTmpDir());
-
- outs() << "Testing with: ";
- printChunks(CurrentChunks, /*Oneline=*/true);
- outs() << " | " << sys::path::filename(CurrentFilepath);
-
- // Current Chunks aren't interesting
- if (!Test.run(CurrentFilepath)) {
- outs() << "\n";
- continue;
- }
- // We only care about interesting chunks if they reduce the testcase
- if (getLines(CurrentFilepath) < getLines(Test.getReducedFilepath())) {
- UninterestingChunks.insert(Chunks[I]);
- Test.setReducedFilepath(CurrentFilepath);
- ReducedProgram = std::move(CurrentProgram);
- outs() << " **** SUCCESS | lines: " << getLines(CurrentFilepath);
- }
- outs() << "\n";
- }
- // Delete uninteresting chunks
- auto It = Chunks.begin(), E = Chunks.end();
- while (It != E) {
- if (UninterestingChunks.count(*It))
- It = Chunks.erase(It);
- else
- ++It;
- }
- } while (!UninterestingChunks.empty() || increaseGranularity(Chunks));
-
- // If we reduced the testcase replace it
- if (ReducedProgram)
- Test.setProgram(std::move(ReducedProgram));
- outs() << "Couldn't increase anymore.\n";
- }
-};
-
-} // namespace llvm
-
-#endif
+++ /dev/null
-//===- llvm-reduce.cpp - The LLVM Delta Reduction utility -----------------===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-//
-// This file is a Specialized Delta Pass, which removes the functions that are
-// not in the provided function-chunks.
-//
-//===----------------------------------------------------------------------===//
-
-#include "RemoveFunctions.h"
-
-using namespace llvm;
-
-/// Removes all the Defined Functions (as well as their calls)
-/// that aren't inside any of the desired Chunks.
-/// @returns the Module stripped of out-of-chunk functions
-std::unique_ptr<Module>
-RemoveFunctions::extractChunksFromModule(std::vector<Chunk> ChunksToKeep,
- Module *Program) {
- std::unique_ptr<Module> Clone = CloneModule(*Program);
-
- // Get functions inside desired chunks
- std::set<Function *> FuncsToKeep;
- int I = 0, FunctionCount = 1;
- for (auto &F : *Clone) {
- if (!F.isDeclaration()) {
- if (FunctionCount >= ChunksToKeep[I].begin &&
- FunctionCount <= ChunksToKeep[I].end) {
- FuncsToKeep.insert(&F);
- }
- if (FunctionCount >= ChunksToKeep[I].end)
- ++I;
- ++FunctionCount;
- }
- }
-
- // Delete out-of-chunk functions, and replace their calls with undef
- std::vector<Function *> FuncsToRemove;
- for (auto &F : *Clone) {
- if (!F.isDeclaration() && !FuncsToKeep.count(&F)) {
- F.replaceAllUsesWith(UndefValue::get(F.getType()));
- FuncsToRemove.push_back(&F);
- }
- }
- for (auto *F : FuncsToRemove)
- F->eraseFromParent();
-
- // Delete instructions with undef calls
- std::vector<Instruction *> InstToRemove;
- for (auto &F : *Clone)
- for (auto &BB : F)
- for (auto &I : BB)
- if (auto *Call = dyn_cast<CallInst>(&I))
- if (!Call->getCalledFunction()) {
- // Instruction might be stored / used somewhere else
- I.replaceAllUsesWith(UndefValue::get(I.getType()));
- InstToRemove.push_back(&I);
- }
-
- for (auto *I : InstToRemove)
- I->eraseFromParent();
-
- return Clone;
-}
-
-/// Counts the amount of non-declaration functions and prints their
-/// respective index & name
-int RemoveFunctions::getTargetCount(Module *Program) {
- // TODO: Silence index with --quiet flag
- outs() << "----------------------------\n";
- outs() << "Chunk Index Reference:\n";
- int FunctionCount = 0;
- for (auto &F : *Program)
- if (!F.isDeclaration()) {
- ++FunctionCount;
- outs() << "\t" << FunctionCount << ": " << F.getName() << "\n";
- }
- outs() << "----------------------------\n";
- return FunctionCount;
-}
+++ /dev/null
-//===- llvm-reduce.cpp - The LLVM Delta Reduction utility -----------------===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-//
-// This file is a Specialized Delta Pass, which removes the functions that are
-// not in the provided function-chunks.
-//
-//===----------------------------------------------------------------------===//
-
-#include "Delta.h"
-#include "llvm/Transforms/Utils/Cloning.h"
-
-namespace llvm {
-
-class RemoveFunctions {
-public:
- /// Outputs the number of Functions in the given Module
- static int getTargetCount(Module *Program);
- /// Clones module and returns it with chunk functions only
- static std::unique_ptr<Module>
- extractChunksFromModule(std::vector<Chunk> ChunksToKeep, Module *Program);
-};
-
-} // namespace llvm
+++ /dev/null
-//===- llvm-reduce.cpp - The LLVM Delta Reduction utility -----------------===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-//
-// This program tries to reduce an IR test case for a given interesting-ness
-// test. It runs multiple delta debugging passes in order to minimize the input
-// file. It's worth noting that this is a *temporary* tool that will eventually
-// be integrated into the bugpoint tool itself.
-//
-//===----------------------------------------------------------------------===//
-
-#include "DeltaManager.h"
-#include "llvm/ADT/SmallString.h"
-#include "llvm/IR/LLVMContext.h"
-#include "llvm/IR/Verifier.h"
-#include "llvm/IRReader/IRReader.h"
-#include "llvm/Support/CommandLine.h"
-#include "llvm/Support/InitLLVM.h"
-#include "llvm/Support/SourceMgr.h"
-#include "llvm/Support/raw_ostream.h"
-#include <system_error>
-#include <vector>
-
-using namespace llvm;
-
-static cl::opt<bool> Help("h", cl::desc("Alias for -help"), cl::Hidden);
-static cl::opt<bool> Version("v", cl::desc("Alias for -version"), cl::Hidden);
-
-static cl::opt<std::string> InputFilename(cl::Positional, cl::Required,
- cl::desc("<input llvm ll/bc file>"));
-
-static cl::opt<std::string>
- TestFilename("test", cl::Required,
- cl::desc("Name of the interesting-ness test to be run"));
-
-static cl::list<std::string>
- TestArguments("test-arg", cl::ZeroOrMore,
- cl::desc("Arguments passed onto the interesting-ness test"));
-
-static cl::opt<std::string>
- OutputFilename("output",
- cl::desc("Specify the output file. default: reduced.ll"));
-static cl::alias OutputFileAlias("o", cl::desc("Alias for -output"),
- cl::aliasopt(OutputFilename));
-
-static cl::opt<bool>
- ReplaceInput("in-place",
- cl::desc("WARNING: This option will replace your input file"
- "with the reduced version!"));
-
-// Parses IR into a Module and verifies it
-static std::unique_ptr<Module> parseInputFile(StringRef Filename,
- LLVMContext &Ctxt) {
- SMDiagnostic Err;
- std::unique_ptr<Module> Result = parseIRFile(Filename, Err, Ctxt);
- if (!Result) {
- Err.print("llvm-reduce", errs());
- return Result;
- }
-
- if (verifyModule(*Result, &errs())) {
- errs() << "Error: " << Filename << " - input module is broken!\n";
- return std::unique_ptr<Module>();
- }
-
- return Result;
-}
-
-/// Gets Current Working Directory and tries to create a Tmp Directory
-static SmallString<128> initializeTmpDirectory() {
- SmallString<128> CWD;
- if (std::error_code EC = sys::fs::current_path(CWD)) {
- errs() << "Error getting current directory: " << EC.message() << "!\n";
- exit(1);
- }
-
- SmallString<128> TmpDirectory;
- sys::path::append(TmpDirectory, CWD, "tmp");
- if (std::error_code EC = sys::fs::create_directory(TmpDirectory))
- errs() << "Error creating tmp directory: " << EC.message() << "!\n";
-
- return TmpDirectory;
-}
-
-int main(int argc, char **argv) {
- InitLLVM X(argc, argv);
-
- cl::ParseCommandLineOptions(argc, argv, "LLVM automatic testcase reducer.\n");
-
- LLVMContext Context;
- std::unique_ptr<Module> OriginalProgram =
- parseInputFile(InputFilename, Context);
-
- // Initialize test environment
- SmallString<128> TmpDirectory = initializeTmpDirectory();
- TestRunner Tester(TestFilename, TestArguments, InputFilename, TmpDirectory);
- Tester.setProgram(std::move(OriginalProgram));
-
- // Try to reduce code
- runDeltaPasses(Tester);
- StringRef ReducedFilename = sys::path::filename(Tester.getReducedFilepath());
-
- if (ReducedFilename == InputFilename) {
- outs() << "\nCouldnt reduce input :/\n";
- } else {
- if (ReplaceInput) // In-place
- OutputFilename = InputFilename.c_str();
- else if (OutputFilename.empty())
- OutputFilename = "reduced.ll";
- else
- OutputFilename += ".ll";
-
- sys::fs::copy_file(Tester.getReducedFilepath(), OutputFilename);
- outs() << "\nDone reducing! Reduced IR to file: " << OutputFilename << "\n";
- }
-
- return 0;
-}
projects / llvm / commitdiff