diff --git a/llvm/test/Reduce/Inputs/remove-global-vars.sh b/llvm/test/Reduce/Inputs/remove-global-vars.sh
new file mode 100755
--- /dev/null
+++ b/llvm/test/Reduce/Inputs/remove-global-vars.sh
@@ -0,0 +1,9 @@
+#!/bin/sh
+
+matches=$(cat $1 | grep "@interesting = global" | wc -l)
+
+if [[ $matches > 0 ]]; then
+ exit 0
+else
+ exit 1
+fi
diff --git a/llvm/test/Reduce/remove-global-vars.ll b/llvm/test/Reduce/remove-global-vars.ll
new file mode 100644
--- /dev/null
+++ b/llvm/test/Reduce/remove-global-vars.ll
@@ -0,0 +1,38 @@
+; Test that llvm-reduce can remove uninteresting Global Variables as well as
+; their direct uses.
+;
+; RUN: llvm-reduce --test %p/Inputs/remove-global-vars.sh %s
+; RUN: cat reduced.ll | FileCheck %s
+; REQUIRES: plugins, shell
+
+@uninteresting1 = global i32 0, align 4
+; CHECK: @interesting = global
+@interesting = global i32 5, align 4
+; CHECK-NOT: global
+@uninteresting2 = global i32 25, align 4
+@uninteresting3 = global i32 50, align 4
+
+define i32 @main() {
+entry:
+ %retval = alloca i32, align 4
+ store i32 0, i32* %retval, align 4
+ ; CHECK-NOT: load i32, i32* @uninteresting2, align 4
+ %0 = load i32, i32* @uninteresting2, align 4
+ store i32 %0, i32* @interesting, align 4
+ ; CHECK-NOT: load i32, i32* @uninteresting3, align 4
+ %1 = load i32, i32* @uninteresting3, align 4
+ %dec = add nsw i32 %1, -1
+ ; CHECK-NOT: store i32 %dec, i32* @uninteresting3, align 4
+ store i32 %dec, i32* @uninteresting3, align 4
+ ; CHECK: load i32, i32* @interesting, align 4
+ %2 = load i32, i32* @interesting, align 4
+ ; CHECK-NOT: load i32, i32* @uninteresting2, align 4
+ %3 = load i32, i32* @uninteresting2, align 4
+ %add = add nsw i32 %2, %3
+ ; CHECK-NOT: store i32 %add, i32* @uninteresting1, align 4
+ store i32 %add, i32* @uninteresting1, align 4
+ store i32 10, i32* @interesting, align 4
+ ; CHECK: load i32, i32* @interesting, align 4
+ %4 = load i32, i32* @interesting, align 4
+ ret i32 0
+}
diff --git a/llvm/tools/llvm-reduce/CMakeLists.txt b/llvm/tools/llvm-reduce/CMakeLists.txt
--- a/llvm/tools/llvm-reduce/CMakeLists.txt
+++ b/llvm/tools/llvm-reduce/CMakeLists.txt
@@ -15,7 +15,9 @@
add_llvm_tool(llvm-reduce
llvm-reduce.cpp
TestRunner.cpp
+ deltas/Delta.cpp
deltas/RemoveFunctions.cpp
+ deltas/RemoveGlobalVars.cpp
DEPENDS
intrinsics_gen
diff --git a/llvm/tools/llvm-reduce/DeltaManager.h b/llvm/tools/llvm-reduce/DeltaManager.h
--- a/llvm/tools/llvm-reduce/DeltaManager.h
+++ b/llvm/tools/llvm-reduce/DeltaManager.h
@@ -1,4 +1,4 @@
-//===- llvm-reduce.cpp - The LLVM Delta Reduction utility -----------------===//
+//===- DeltaManager.h - Runs Delta Passes to reduce Input -----------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
@@ -6,21 +6,25 @@
//
//===----------------------------------------------------------------------===//
//
-// This class calls each specialized Delta pass by passing it as a template to
-// the generic Delta Pass.
+// This file calls each specialized Delta pass in order to reduce the input IR
+// file.
//
//===----------------------------------------------------------------------===//
#include "TestRunner.h"
#include "deltas/Delta.h"
#include "deltas/RemoveFunctions.h"
+#include "deltas/RemoveGlobalVars.h"
namespace llvm {
inline void runDeltaPasses(TestRunner &Tester) {
+ // TODO: Add option to only call certain delta passes
outs() << "Reducing functions...\n";
- Delta<RemoveFunctions>::run(Tester);
- // TODO: Implement the rest of the Delta Passes
+ removeFunctionsDeltaPass(Tester);
+ outs() << "Reducing GVs...\n";
+ removeGlobalsDeltaPass(Tester);
+ // TODO: Implement the remaining Delta Passes
}
} // namespace llvm
diff --git a/llvm/tools/llvm-reduce/TestRunner.h b/llvm/tools/llvm-reduce/TestRunner.h
--- a/llvm/tools/llvm-reduce/TestRunner.h
+++ b/llvm/tools/llvm-reduce/TestRunner.h
@@ -1,4 +1,4 @@
-//===- llvm-reduce.cpp - The LLVM Delta Reduction utility -----------------===//
+//===-- tools/llvm-reduce/TestRunner.h ---------------------------*- C++ -*-===/
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
diff --git a/llvm/tools/llvm-reduce/TestRunner.cpp b/llvm/tools/llvm-reduce/TestRunner.cpp
--- a/llvm/tools/llvm-reduce/TestRunner.cpp
+++ b/llvm/tools/llvm-reduce/TestRunner.cpp
@@ -1,3 +1,11 @@
+//===-- TestRunner.cpp ----------------------------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
#include "TestRunner.h"
using namespace llvm;
diff --git a/llvm/tools/llvm-reduce/deltas/Delta.h b/llvm/tools/llvm-reduce/deltas/Delta.h
--- a/llvm/tools/llvm-reduce/deltas/Delta.h
+++ b/llvm/tools/llvm-reduce/deltas/Delta.h
@@ -1,4 +1,4 @@
-//===- llvm-reduce.cpp - The LLVM Delta Reduction utility -----------------===//
+//===- Delta.h - Delta Debugging Algorithm Implementation -----------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
@@ -42,180 +42,33 @@
}
};
-/// 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
+/// This function implements the Delta Debugging algorithm, it receives a
+/// number 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. 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.
+/// This function is intended to be called by each specialized delta pass (e.g.
+/// RemoveFunctions) and receives three key parameters:
+/// * Test: The main TestRunner instance which is used to run the provided
+/// interesting-ness test, as well as to store and access the reduced Program.
+/// * Targets: The amount of Targets that are going to be reduced by the
+/// algorithm, for example, the RemoveGlobalVars pass would send the amount of
+/// initialized GVs.
+/// * ExtractChunksFromModule: A function used to tailor the main program so it
+/// only contains Targets that are inside Chunks of the given iteration.
+/// Note: This function is implemented by each specialized Delta pass
///
-/// 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 UnwantedChunks = Chunks.end();
- UnwantedChunks = std::remove_if(Chunks.begin(), Chunks.end(),
- [UninterestingChunks](const Chunk &C) {
- return UninterestingChunks.count(C);
- });
- Chunks.erase(UnwantedChunks, Chunks.end());
- } 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";
- }
-};
+/// Other implementations of the Delta Debugging algorithm can also be found in
+/// the CReduce, Delta, and Lithium projects.
+void runDeltaPass(
+ TestRunner &Test, int Targets,
+ std::function<std::unique_ptr<Module>(std::vector<Chunk>, Module *)>
+ ExtractChunksFromModule);
} // namespace llvm
diff --git a/llvm/tools/llvm-reduce/deltas/Delta.cpp b/llvm/tools/llvm-reduce/deltas/Delta.cpp
new file mode 100644
--- /dev/null
+++ b/llvm/tools/llvm-reduce/deltas/Delta.cpp
@@ -0,0 +1,171 @@
+//===- Delta.cpp - Delta Debugging Algorithm Implementation ---------------===//
+//
+// 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.
+//
+//===----------------------------------------------------------------------===//
+
+#include "Delta.h"
+
+/// Writes IR code to the given Filepath
+static 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 writes
+/// the given module IR.
+static 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].
+static 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
+static 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.
+static 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;
+}
+
+void llvm::runDeltaPass(
+ TestRunner &Test, int Targets,
+ std::function<std::unique_ptr<Module>(std::vector<Chunk>, Module *)>
+ ExtractChunksFromModule) {
+ if (!Targets)
+ return;
+
+ std::vector<Chunk> Chunks = {{1, Targets}};
+ std::set<Chunk> UninterestingChunks;
+ std::unique_ptr<Module> ReducedProgram;
+
+ if (!Test.run(Test.getReducedFilepath()) || !increaseGranularity(Chunks)) {
+ outs() << "\nCouldn't reduce\n";
+ outs() << "----------------------------\n";
+ return;
+ }
+
+ 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);
+
+ if (CurrentChunks.empty())
+ break;
+
+ // Generate Module with only Targets inside Current Chunks
+ std::unique_ptr<Module> CurrentProgram =
+ 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 UnwantedChunks = Chunks.end();
+ UnwantedChunks = std::remove_if(Chunks.begin(), Chunks.end(),
+ [UninterestingChunks](const Chunk &C) {
+ return UninterestingChunks.count(C);
+ });
+ Chunks.erase(UnwantedChunks, Chunks.end());
+
+ } 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";
+ outs() << "----------------------------\n";
+}
\ No newline at end of file
diff --git a/llvm/tools/llvm-reduce/deltas/RemoveFunctions.h b/llvm/tools/llvm-reduce/deltas/RemoveFunctions.h
--- a/llvm/tools/llvm-reduce/deltas/RemoveFunctions.h
+++ b/llvm/tools/llvm-reduce/deltas/RemoveFunctions.h
@@ -1,4 +1,4 @@
-//===- llvm-reduce.cpp - The LLVM Delta Reduction utility -----------------===//
+//===- RemoveFunctions.h - Specialized Delta Pass -------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
@@ -6,8 +6,9 @@
//
//===----------------------------------------------------------------------===//
//
-// This file is a Specialized Delta Pass, which removes the functions that are
-// not in the provided function-chunks.
+// This file implements a function which calls the Generic Delta pass in order
+// to reduce functions (and any instruction that calls it) in the provided
+// Module.
//
//===----------------------------------------------------------------------===//
@@ -15,14 +16,5 @@
#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);
-};
-
+void removeFunctionsDeltaPass(TestRunner &Test);
} // namespace llvm
diff --git a/llvm/tools/llvm-reduce/deltas/RemoveFunctions.cpp b/llvm/tools/llvm-reduce/deltas/RemoveFunctions.cpp
--- a/llvm/tools/llvm-reduce/deltas/RemoveFunctions.cpp
+++ b/llvm/tools/llvm-reduce/deltas/RemoveFunctions.cpp
@@ -1,4 +1,4 @@
-//===- llvm-reduce.cpp - The LLVM Delta Reduction utility -----------------===//
+//===- RemoveFunctions.cpp - Specialized Delta Pass -----------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
@@ -6,33 +6,30 @@
//
//===----------------------------------------------------------------------===//
//
-// This file is a Specialized Delta Pass, which removes the functions that are
-// not in the provided function-chunks.
+// This file implements a function which calls the Generic Delta pass in order
+// to reduce functions (and any instruction that calls it) in the provided
+// Module.
//
//===----------------------------------------------------------------------===//
#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) {
+static std::unique_ptr<Module>
+extractFunctionsFromModule(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 (!F.isDeclaration() && I < ChunksToKeep.size()) {
if (FunctionCount >= ChunksToKeep[I].begin &&
- FunctionCount <= ChunksToKeep[I].end) {
+ FunctionCount <= ChunksToKeep[I].end)
FuncsToKeep.insert(&F);
- }
- if (FunctionCount >= ChunksToKeep[I].end)
+ if (FunctionCount == ChunksToKeep[I].end)
++I;
++FunctionCount;
}
@@ -68,11 +65,11 @@
}
/// Counts the amount of non-declaration functions and prints their
-/// respective index & name
-int RemoveFunctions::getTargetCount(Module *Program) {
+/// respective name & index
+static int countFunctions(Module *Program) {
// TODO: Silence index with --quiet flag
outs() << "----------------------------\n";
- outs() << "Chunk Index Reference:\n";
+ outs() << "Function Index Reference:\n";
int FunctionCount = 0;
for (auto &F : *Program)
if (!F.isDeclaration()) {
@@ -82,3 +79,8 @@
outs() << "----------------------------\n";
return FunctionCount;
}
+
+void llvm::removeFunctionsDeltaPass(TestRunner &Test) {
+ int FunctionCount = countFunctions(Test.getProgram());
+ runDeltaPass(Test, FunctionCount, extractFunctionsFromModule);
+}
\ No newline at end of file
diff --git a/llvm/tools/llvm-reduce/deltas/RemoveGlobalVars.h b/llvm/tools/llvm-reduce/deltas/RemoveGlobalVars.h
new file mode 100644
--- /dev/null
+++ b/llvm/tools/llvm-reduce/deltas/RemoveGlobalVars.h
@@ -0,0 +1,20 @@
+//===- RemoveGlobalVars.h - Specialized Delta Pass ------------------------===//
+//
+// 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 implements a function which calls the Generic Delta pass in order
+// to reduce initialized Global Variables in the provided Module.
+//
+//===----------------------------------------------------------------------===//
+
+#include "Delta.h"
+#include "llvm/IR/Value.h"
+#include "llvm/Transforms/Utils/Cloning.h"
+
+namespace llvm {
+void removeGlobalsDeltaPass(TestRunner &Test);
+} // namespace llvm
diff --git a/llvm/tools/llvm-reduce/deltas/RemoveGlobalVars.cpp b/llvm/tools/llvm-reduce/deltas/RemoveGlobalVars.cpp
new file mode 100644
--- /dev/null
+++ b/llvm/tools/llvm-reduce/deltas/RemoveGlobalVars.cpp
@@ -0,0 +1,79 @@
+//===- RemoveGlobalVars.cpp - Specialized Delta Pass ----------------------===//
+//
+// 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 implements a function which calls the Generic Delta pass in order
+// to reduce initialized Global Variables in the provided Module.
+//
+//===----------------------------------------------------------------------===//
+
+#include "RemoveGlobalVars.h"
+
+/// Removes all the Initialized GVs that aren't inside the desired Chunks.
+/// @returns the Module stripped of out-of-chunk GVs
+static std::unique_ptr<Module>
+extractGVsFromModule(std::vector<Chunk> ChunksToKeep, Module *Program) {
+ std::unique_ptr<Module> Clone = CloneModule(*Program);
+
+ // Get GVs inside desired chunks
+ std::set<GlobalVariable *> GVsToKeep;
+ int I = 0, GVCount = 1;
+ for (auto &GV : Clone->globals()) {
+ if (GV.hasInitializer() && I < ChunksToKeep.size()) {
+ if (GVCount >= ChunksToKeep[I].begin && GVCount <= ChunksToKeep[I].end)
+ GVsToKeep.insert(&GV);
+ if (GVCount == ChunksToKeep[I].end)
+ ++I;
+ ++GVCount;
+ }
+ }
+
+ // Replace out-of-chunk GV uses with undef
+ std::vector<GlobalVariable *> ToRemove;
+ std::vector<Instruction *> InstToRemove;
+ for (auto &GV : Clone->globals())
+ if (GV.hasInitializer() && !GVsToKeep.count(&GV)) {
+ for (auto U : GV.users())
+ if (auto *Inst = dyn_cast<Instruction>(U))
+ InstToRemove.push_back(Inst);
+
+ GV.replaceAllUsesWith(UndefValue::get(GV.getType()));
+ ToRemove.push_back(&GV);
+ }
+
+ // Delete Instruction uses of unwanted GVs
+ for (auto *Inst : InstToRemove) {
+ Inst->replaceAllUsesWith(UndefValue::get(Inst->getType()));
+ Inst->eraseFromParent();
+ }
+
+ for (auto *GV : ToRemove)
+ GV->eraseFromParent();
+
+ return Clone;
+}
+
+/// Counts the amount of initialized GVs and displays their
+/// respective name & index
+static int countGVs(Module *Program) {
+ // TODO: Silence index with --quiet flag
+ outs() << "----------------------------\n";
+ outs() << "GlobalVariable Index Reference:\n";
+ int GVCount = 0;
+ for (auto &GV : Program->globals())
+ if (GV.hasInitializer()) {
+ ++GVCount;
+ outs() << "\t" << GVCount << ": " << GV.getName() << "\n";
+ }
+ outs() << "----------------------------\n";
+ return GVCount;
+}
+
+void llvm::removeGlobalsDeltaPass(TestRunner &Test) {
+ int GVCount = countGVs(Test.getProgram());
+ runDeltaPass(Test, GVCount, extractGVsFromModule);
+}
diff --git a/llvm/tools/llvm-reduce/llvm-reduce.cpp b/llvm/tools/llvm-reduce/llvm-reduce.cpp
--- a/llvm/tools/llvm-reduce/llvm-reduce.cpp
+++ b/llvm/tools/llvm-reduce/llvm-reduce.cpp
@@ -8,8 +8,9 @@
//
// 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.
+// file. It's worth noting that this is a part of the bugpoint redesign
+// proposal, and thus a *temporary* tool that will eventually be integrated
+// into the bugpoint tool itself.
//
//===----------------------------------------------------------------------===//