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//===- InjectorIRStrategyTest.cpp - Tests for injector strategy -----------===//
//
// 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 "llvm/ADT/StringRef.h"
#include "llvm/AsmParser/Parser.h"
#include "llvm/AsmParser/SlotMapping.h"
#include "llvm/FuzzMutate/IRMutator.h"
#include "llvm/FuzzMutate/Operations.h"
#include "llvm/IR/Instructions.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/IR/Module.h"
#include "llvm/IR/Verifier.h"
#include "llvm/Support/SourceMgr.h"
#include "gtest/gtest.h"
using namespace llvm;
static constexpr int Seed = 5;
namespace {
std::unique_ptr<IRMutator> createInjectorMutator() {
std::vector<TypeGetter> Types{
Type::getInt1Ty, Type::getInt8Ty, Type::getInt16Ty, Type::getInt32Ty,
Type::getInt64Ty, Type::getFloatTy, Type::getDoubleTy};
std::vector<std::unique_ptr<IRMutationStrategy>> Strategies;
Strategies.push_back(
llvm::make_unique<InjectorIRStrategy>(
InjectorIRStrategy::getDefaultOps()));
return llvm::make_unique<IRMutator>(std::move(Types), std::move(Strategies));
}
std::unique_ptr<IRMutator> createDeleterMutator() {
std::vector<TypeGetter> Types{
Type::getInt1Ty, Type::getInt8Ty, Type::getInt16Ty, Type::getInt32Ty,
Type::getInt64Ty, Type::getFloatTy, Type::getDoubleTy};
std::vector<std::unique_ptr<IRMutationStrategy>> Strategies;
Strategies.push_back(llvm::make_unique<InstDeleterIRStrategy>());
return llvm::make_unique<IRMutator>(std::move(Types), std::move(Strategies));
}
std::unique_ptr<Module> parseAssembly(
const char *Assembly, LLVMContext &Context) {
SMDiagnostic Error;
std::unique_ptr<Module> M = parseAssemblyString(Assembly, Error, Context);
std::string ErrMsg;
raw_string_ostream OS(ErrMsg);
Error.print("", OS);
assert(M && !verifyModule(*M, &errs()));
return M;
}
void IterateOnSource(StringRef Source, IRMutator &Mutator) {
LLVMContext Ctx;
for (int i = 0; i < 10; ++i) {
auto M = parseAssembly(Source.data(), Ctx);
ASSERT_TRUE(M && !verifyModule(*M, &errs()));
Mutator.mutateModule(*M, Seed, Source.size(), Source.size() + 100);
EXPECT_TRUE(!verifyModule(*M, &errs()));
}
}
TEST(InjectorIRStrategyTest, EmptyModule) {
// Test that we can inject into empty module
LLVMContext Ctx;
auto M = llvm::make_unique<Module>("M", Ctx);
ASSERT_TRUE(M && !verifyModule(*M, &errs()));
auto Mutator = createInjectorMutator();
ASSERT_TRUE(Mutator);
Mutator->mutateModule(*M, Seed, 1, 1);
EXPECT_TRUE(!verifyModule(*M, &errs()));
}
TEST(InstDeleterIRStrategyTest, EmptyFunction) {
// Test that we don't crash even if we can't remove from one of the functions.
StringRef Source = ""
"define <8 x i32> @func1() {\n"
"ret <8 x i32> undef\n"
"}\n"
"\n"
"define i32 @func2() {\n"
"%A9 = alloca i32\n"
"%L6 = load i32, i32* %A9\n"
"ret i32 %L6\n"
"}\n";
auto Mutator = createDeleterMutator();
ASSERT_TRUE(Mutator);
IterateOnSource(Source, *Mutator);
}
TEST(InstDeleterIRStrategyTest, PhiNodes) {
// Test that inst deleter works correctly with the phi nodes.
LLVMContext Ctx;
StringRef Source = "\n\
define i32 @earlyreturncrash(i32 %x) {\n\
entry:\n\
switch i32 %x, label %sw.epilog [\n\
i32 1, label %sw.bb1\n\
]\n\
\n\
sw.bb1:\n\
br label %sw.epilog\n\
\n\
sw.epilog:\n\
%a.0 = phi i32 [ 7, %entry ], [ 9, %sw.bb1 ]\n\
%b.0 = phi i32 [ 10, %entry ], [ 4, %sw.bb1 ]\n\
ret i32 %a.0\n\
}";
auto Mutator = createDeleterMutator();
ASSERT_TRUE(Mutator);
IterateOnSource(Source, *Mutator);
}
}
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