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llvm / llvm-project / llvm / 49a8cd29ed54c64b3b1fd80612508262a4a7b519 / . / unittests / Analysis / IRSimilarityIdentifierTest.cpp
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//===- IRSimilarityIdentifierTest.cpp - IRSimilarityIdentifier unit tests -===//
//
// 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
//
//===----------------------------------------------------------------------===//
//
// Tests for components for finding similarity such as the instruction mapper,
// suffix tree usage, and structural analysis.
//
//===----------------------------------------------------------------------===//
#include "llvm/Analysis/IRSimilarityIdentifier.h"
#include "llvm/AsmParser/Parser.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/IR/Module.h"
#include "llvm/Support/Allocator.h"
#include "llvm/Support/SourceMgr.h"
#include "gtest/gtest.h"
using namespace llvm;
using namespace IRSimilarity;
static std::unique_ptr<Module> makeLLVMModule(LLVMContext &Context,
StringRef ModuleStr) {
SMDiagnostic Err;
std::unique_ptr<Module> M = parseAssemblyString(ModuleStr, Err, Context);
assert(M && "Bad LLVM IR?");
return M;
}
void getVectors(Module &M, IRInstructionMapper &Mapper,
std::vector<IRInstructionData *> &InstrList,
std::vector<unsigned> &UnsignedVec) {
for (Function &F : M)
for (BasicBlock &BB : F)
Mapper.convertToUnsignedVec(BB, InstrList, UnsignedVec);
}
void getSimilarities(
Module &M,
std::vector<std::vector<IRSimilarityCandidate>> &SimilarityCandidates) {
IRSimilarityIdentifier Identifier;
SimilarityCandidates = Identifier.findSimilarity(M);
}
// Checks that different opcodes are mapped to different values
TEST(IRInstructionMapper, OpcodeDifferentiation) {
StringRef ModuleString = R"(
define i32 @f(i32 %a, i32 %b) {
bb0:
%0 = add i32 %a, %b
%1 = mul i32 %a, %b
ret i32 0
})";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<IRInstructionData *> InstrList;
std::vector<unsigned> UnsignedVec;
SpecificBumpPtrAllocator<IRInstructionData> InstDataAllocator;
SpecificBumpPtrAllocator<IRInstructionDataList> IDLAllocator;
IRInstructionMapper Mapper(&InstDataAllocator, &IDLAllocator);
getVectors(*M, Mapper, InstrList, UnsignedVec);
// Check that the size of the unsigned vector and the instruction list are the
// same as a safety check.
ASSERT_TRUE(InstrList.size() == UnsignedVec.size());
// Make sure that the unsigned vector is the expected size.
ASSERT_TRUE(UnsignedVec.size() == 3);
// Check whether the instructions are not mapped to the same value.
ASSERT_TRUE(UnsignedVec[0] != UnsignedVec[1]);
}
// Checks that the same opcodes and types are mapped to the same values.
TEST(IRInstructionMapper, OpcodeTypeSimilarity) {
StringRef ModuleString = R"(
define i32 @f(i32 %a, i32 %b) {
bb0:
%0 = add i32 %a, %b
%1 = add i32 %b, %a
ret i32 0
})";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<IRInstructionData *> InstrList;
std::vector<unsigned> UnsignedVec;
SpecificBumpPtrAllocator<IRInstructionData> InstDataAllocator;
SpecificBumpPtrAllocator<IRInstructionDataList> IDLAllocator;
IRInstructionMapper Mapper(&InstDataAllocator, &IDLAllocator);
getVectors(*M, Mapper, InstrList, UnsignedVec);
ASSERT_TRUE(InstrList.size() == UnsignedVec.size());
ASSERT_TRUE(UnsignedVec.size() == 3);
// Check whether the instructions are mapped to the same value.
ASSERT_TRUE(UnsignedVec[0] == UnsignedVec[1]);
}
// Checks that the same opcode and different types are mapped to different
// values.
TEST(IRInstructionMapper, TypeDifferentiation) {
StringRef ModuleString = R"(
define i32 @f(i32 %a, i32 %b, i64 %c, i64 %d) {
bb0:
%0 = add i32 %a, %b
%1 = add i64 %c, %d
ret i32 0
})";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<IRInstructionData *> InstrList;
std::vector<unsigned> UnsignedVec;
SpecificBumpPtrAllocator<IRInstructionData> InstDataAllocator;
SpecificBumpPtrAllocator<IRInstructionDataList> IDLAllocator;
IRInstructionMapper Mapper(&InstDataAllocator, &IDLAllocator);
getVectors(*M, Mapper, InstrList, UnsignedVec);
ASSERT_TRUE(InstrList.size() == UnsignedVec.size());
ASSERT_TRUE(UnsignedVec.size() == 3);
ASSERT_TRUE(UnsignedVec[0] != UnsignedVec[1]);
}
// Checks that different predicates map to different values.
TEST(IRInstructionMapper, PredicateDifferentiation) {
StringRef ModuleString = R"(
define i32 @f(i32 %a, i32 %b) {
bb0:
%0 = icmp sge i32 %b, %a
%1 = icmp slt i32 %a, %b
ret i32 0
})";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<IRInstructionData *> InstrList;
std::vector<unsigned> UnsignedVec;
SpecificBumpPtrAllocator<IRInstructionData> InstDataAllocator;
SpecificBumpPtrAllocator<IRInstructionDataList> IDLAllocator;
IRInstructionMapper Mapper(&InstDataAllocator, &IDLAllocator);
getVectors(*M, Mapper, InstrList, UnsignedVec);
ASSERT_TRUE(InstrList.size() == UnsignedVec.size());
ASSERT_TRUE(UnsignedVec.size() == 3);
ASSERT_TRUE(UnsignedVec[0] != UnsignedVec[1]);
}
// Checks that predicates where that can be considered the same when the
// operands are swapped, i.e. greater than to less than are mapped to the same
// unsigned integer.
TEST(IRInstructionMapper, PredicateIsomorphism) {
StringRef ModuleString = R"(
define i32 @f(i32 %a, i32 %b) {
bb0:
%0 = icmp sgt i32 %a, %b
%1 = icmp slt i32 %b, %a
ret i32 0
})";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<IRInstructionData *> InstrList;
std::vector<unsigned> UnsignedVec;
SpecificBumpPtrAllocator<IRInstructionData> InstDataAllocator;
SpecificBumpPtrAllocator<IRInstructionDataList> IDLAllocator;
IRInstructionMapper Mapper(&InstDataAllocator, &IDLAllocator);
getVectors(*M, Mapper, InstrList, UnsignedVec);
ASSERT_TRUE(InstrList.size() == UnsignedVec.size());
ASSERT_TRUE(UnsignedVec.size() == 3);
ASSERT_TRUE(UnsignedVec[0] == UnsignedVec[1]);
}
// Checks that the same predicate maps to the same value.
TEST(IRInstructionMapper, PredicateSimilarity) {
StringRef ModuleString = R"(
define i32 @f(i32 %a, i32 %b) {
bb0:
%0 = icmp slt i32 %a, %b
%1 = icmp slt i32 %b, %a
ret i32 0
})";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<IRInstructionData *> InstrList;
std::vector<unsigned> UnsignedVec;
SpecificBumpPtrAllocator<IRInstructionData> InstDataAllocator;
SpecificBumpPtrAllocator<IRInstructionDataList> IDLAllocator;
IRInstructionMapper Mapper(&InstDataAllocator, &IDLAllocator);
getVectors(*M, Mapper, InstrList, UnsignedVec);
ASSERT_TRUE(InstrList.size() == UnsignedVec.size());
ASSERT_TRUE(UnsignedVec.size() == 3);
ASSERT_TRUE(UnsignedVec[0] == UnsignedVec[1]);
}
// Checks that the same predicate maps to the same value for floating point
// CmpInsts.
TEST(IRInstructionMapper, FPPredicateSimilarity) {
StringRef ModuleString = R"(
define i32 @f(double %a, double %b) {
bb0:
%0 = fcmp olt double %a, %b
%1 = fcmp olt double %b, %a
ret i32 0
})";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<IRInstructionData *> InstrList;
std::vector<unsigned> UnsignedVec;
SpecificBumpPtrAllocator<IRInstructionData> InstDataAllocator;
SpecificBumpPtrAllocator<IRInstructionDataList> IDLAllocator;
IRInstructionMapper Mapper(&InstDataAllocator, &IDLAllocator);
getVectors(*M, Mapper, InstrList, UnsignedVec);
ASSERT_TRUE(InstrList.size() == UnsignedVec.size());
ASSERT_TRUE(UnsignedVec.size() == 3);
ASSERT_TRUE(UnsignedVec[0] == UnsignedVec[1]);
}
// Checks that the different predicate maps to a different value for floating
// point CmpInsts.
TEST(IRInstructionMapper, FPPredicatDifference) {
StringRef ModuleString = R"(
define i32 @f(double %a, double %b) {
bb0:
%0 = fcmp olt double %a, %b
%1 = fcmp oge double %b, %a
ret i32 0
})";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<IRInstructionData *> InstrList;
std::vector<unsigned> UnsignedVec;
SpecificBumpPtrAllocator<IRInstructionData> InstDataAllocator;
SpecificBumpPtrAllocator<IRInstructionDataList> IDLAllocator;
IRInstructionMapper Mapper(&InstDataAllocator, &IDLAllocator);
getVectors(*M, Mapper, InstrList, UnsignedVec);
ASSERT_TRUE(InstrList.size() == UnsignedVec.size());
ASSERT_TRUE(UnsignedVec.size() == 3);
ASSERT_TRUE(UnsignedVec[0] != UnsignedVec[1]);
}
// Checks that the zexts that have the same type parameters map to the same
// unsigned integer.
TEST(IRInstructionMapper, ZextTypeSimilarity) {
StringRef ModuleString = R"(
define i32 @f(i32 %a) {
bb0:
%0 = zext i32 %a to i64
%1 = zext i32 %a to i64
ret i32 0
})";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<IRInstructionData *> InstrList;
std::vector<unsigned> UnsignedVec;
SpecificBumpPtrAllocator<IRInstructionData> InstDataAllocator;
SpecificBumpPtrAllocator<IRInstructionDataList> IDLAllocator;
IRInstructionMapper Mapper(&InstDataAllocator, &IDLAllocator);
getVectors(*M, Mapper, InstrList, UnsignedVec);
ASSERT_TRUE(InstrList.size() == UnsignedVec.size());
ASSERT_TRUE(UnsignedVec.size() == 3);
ASSERT_TRUE(UnsignedVec[0] == UnsignedVec[1]);
}
// Checks that the sexts that have the same type parameters map to the same
// unsigned integer.
TEST(IRInstructionMapper, SextTypeSimilarity) {
StringRef ModuleString = R"(
define i32 @f(i32 %a) {
bb0:
%0 = sext i32 %a to i64
%1 = sext i32 %a to i64
ret i32 0
})";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<IRInstructionData *> InstrList;
std::vector<unsigned> UnsignedVec;
SpecificBumpPtrAllocator<IRInstructionData> InstDataAllocator;
SpecificBumpPtrAllocator<IRInstructionDataList> IDLAllocator;
IRInstructionMapper Mapper(&InstDataAllocator, &IDLAllocator);
getVectors(*M, Mapper, InstrList, UnsignedVec);
ASSERT_TRUE(InstrList.size() == UnsignedVec.size());
ASSERT_TRUE(UnsignedVec.size() == 3);
ASSERT_TRUE(UnsignedVec[0] == UnsignedVec[1]);
}
// Checks that the zexts that have the different type parameters map to the
// different unsigned integers.
TEST(IRInstructionMapper, ZextTypeDifference) {
StringRef ModuleString = R"(
define i32 @f(i32 %a, i8 %b) {
bb0:
%0 = zext i32 %a to i64
%1 = zext i8 %b to i32
ret i32 0
})";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<IRInstructionData *> InstrList;
std::vector<unsigned> UnsignedVec;
SpecificBumpPtrAllocator<IRInstructionData> InstDataAllocator;
SpecificBumpPtrAllocator<IRInstructionDataList> IDLAllocator;
IRInstructionMapper Mapper(&InstDataAllocator, &IDLAllocator);
getVectors(*M, Mapper, InstrList, UnsignedVec);
ASSERT_TRUE(InstrList.size() == UnsignedVec.size());
ASSERT_TRUE(UnsignedVec.size() == 3);
ASSERT_TRUE(UnsignedVec[0] != UnsignedVec[1]);
}
// Checks that the sexts that have the different type parameters map to the
// different unsigned integers.
TEST(IRInstructionMapper, SextTypeDifference) {
StringRef ModuleString = R"(
define i32 @f(i32 %a, i8 %b) {
bb0:
%0 = sext i32 %a to i64
%1 = sext i8 %b to i32
ret i32 0
})";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<IRInstructionData *> InstrList;
std::vector<unsigned> UnsignedVec;
SpecificBumpPtrAllocator<IRInstructionData> InstDataAllocator;
SpecificBumpPtrAllocator<IRInstructionDataList> IDLAllocator;
IRInstructionMapper Mapper(&InstDataAllocator, &IDLAllocator);
getVectors(*M, Mapper, InstrList, UnsignedVec);
ASSERT_TRUE(InstrList.size() == UnsignedVec.size());
ASSERT_TRUE(UnsignedVec.size() == 3);
ASSERT_TRUE(UnsignedVec[0] != UnsignedVec[1]);
}
// Checks that loads that have the same type are mapped to the same unsigned
// integer.
TEST(IRInstructionMapper, LoadSimilarType) {
StringRef ModuleString = R"(
define i32 @f(i32* %a, i32* %b) {
bb0:
%0 = load i32, i32* %a
%1 = load i32, i32* %b
ret i32 0
})";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<IRInstructionData *> InstrList;
std::vector<unsigned> UnsignedVec;
SpecificBumpPtrAllocator<IRInstructionData> InstDataAllocator;
SpecificBumpPtrAllocator<IRInstructionDataList> IDLAllocator;
IRInstructionMapper Mapper(&InstDataAllocator, &IDLAllocator);
getVectors(*M, Mapper, InstrList, UnsignedVec);
ASSERT_TRUE(InstrList.size() == UnsignedVec.size());
ASSERT_TRUE(UnsignedVec.size() == 3);
ASSERT_TRUE(UnsignedVec[0] == UnsignedVec[1]);
}
// Checks that loads that have the different types are mapped to
// different unsigned integers.
TEST(IRInstructionMapper, LoadDifferentType) {
StringRef ModuleString = R"(
define i32 @f(i32* %a, i64* %b) {
bb0:
%0 = load i32, i32* %a
%1 = load i64, i64* %b
ret i32 0
})";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<IRInstructionData *> InstrList;
std::vector<unsigned> UnsignedVec;
SpecificBumpPtrAllocator<IRInstructionData> InstDataAllocator;
SpecificBumpPtrAllocator<IRInstructionDataList> IDLAllocator;
IRInstructionMapper Mapper(&InstDataAllocator, &IDLAllocator);
getVectors(*M, Mapper, InstrList, UnsignedVec);
ASSERT_TRUE(InstrList.size() == UnsignedVec.size());
ASSERT_TRUE(UnsignedVec.size() == 3);
ASSERT_TRUE(UnsignedVec[0] != UnsignedVec[1]);
}
// Checks that loads that have the different aligns are mapped to different
// unsigned integers.
TEST(IRInstructionMapper, LoadDifferentAlign) {
StringRef ModuleString = R"(
define i32 @f(i32* %a, i32* %b) {
bb0:
%0 = load i32, i32* %a, align 4
%1 = load i32, i32* %b, align 8
ret i32 0
})";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<IRInstructionData *> InstrList;
std::vector<unsigned> UnsignedVec;
SpecificBumpPtrAllocator<IRInstructionData> InstDataAllocator;
SpecificBumpPtrAllocator<IRInstructionDataList> IDLAllocator;
IRInstructionMapper Mapper(&InstDataAllocator, &IDLAllocator);
getVectors(*M, Mapper, InstrList, UnsignedVec);
ASSERT_TRUE(InstrList.size() == UnsignedVec.size());
ASSERT_TRUE(UnsignedVec.size() == 3);
ASSERT_TRUE(UnsignedVec[0] != UnsignedVec[1]);
}
// Checks that loads that have the different volatile settings are mapped to
// different unsigned integers.
TEST(IRInstructionMapper, LoadDifferentVolatile) {
StringRef ModuleString = R"(
define i32 @f(i32* %a, i32* %b) {
bb0:
%0 = load volatile i32, i32* %a
%1 = load i32, i32* %b
ret i32 0
})";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<IRInstructionData *> InstrList;
std::vector<unsigned> UnsignedVec;
SpecificBumpPtrAllocator<IRInstructionData> InstDataAllocator;
SpecificBumpPtrAllocator<IRInstructionDataList> IDLAllocator;
IRInstructionMapper Mapper(&InstDataAllocator, &IDLAllocator);
getVectors(*M, Mapper, InstrList, UnsignedVec);
ASSERT_TRUE(InstrList.size() == UnsignedVec.size());
ASSERT_TRUE(UnsignedVec.size() == 3);
ASSERT_TRUE(UnsignedVec[0] != UnsignedVec[1]);
}
// Checks that loads that have the same volatile settings are mapped to
// different unsigned integers.
TEST(IRInstructionMapper, LoadSameVolatile) {
StringRef ModuleString = R"(
define i32 @f(i32* %a, i32* %b) {
bb0:
%0 = load volatile i32, i32* %a
%1 = load volatile i32, i32* %b
ret i32 0
})";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<IRInstructionData *> InstrList;
std::vector<unsigned> UnsignedVec;
SpecificBumpPtrAllocator<IRInstructionData> InstDataAllocator;
SpecificBumpPtrAllocator<IRInstructionDataList> IDLAllocator;
IRInstructionMapper Mapper(&InstDataAllocator, &IDLAllocator);
getVectors(*M, Mapper, InstrList, UnsignedVec);
ASSERT_TRUE(InstrList.size() == UnsignedVec.size());
ASSERT_TRUE(UnsignedVec.size() == 3);
ASSERT_TRUE(UnsignedVec[0] == UnsignedVec[1]);
}
// Checks that loads that have the different atomicity settings are mapped to
// different unsigned integers.
TEST(IRInstructionMapper, LoadDifferentAtomic) {
StringRef ModuleString = R"(
define i32 @f(i32* %a, i32* %b) {
bb0:
%0 = load atomic i32, i32* %a unordered, align 4
%1 = load atomic i32, i32* %b monotonic, align 4
ret i32 0
})";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<IRInstructionData *> InstrList;
std::vector<unsigned> UnsignedVec;
SpecificBumpPtrAllocator<IRInstructionData> InstDataAllocator;
SpecificBumpPtrAllocator<IRInstructionDataList> IDLAllocator;
IRInstructionMapper Mapper(&InstDataAllocator, &IDLAllocator);
getVectors(*M, Mapper, InstrList, UnsignedVec);
ASSERT_TRUE(InstrList.size() == UnsignedVec.size());
ASSERT_TRUE(UnsignedVec.size() == 3);
ASSERT_TRUE(UnsignedVec[0] != UnsignedVec[1]);
}
// Checks that loads that have the same atomicity settings are mapped to
// different unsigned integers.
TEST(IRInstructionMapper, LoadSameAtomic) {
StringRef ModuleString = R"(
define i32 @f(i32* %a, i32* %b) {
bb0:
%0 = load atomic i32, i32* %a unordered, align 4
%1 = load atomic i32, i32* %b unordered, align 4
ret i32 0
})";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<IRInstructionData *> InstrList;
std::vector<unsigned> UnsignedVec;
SpecificBumpPtrAllocator<IRInstructionData> InstDataAllocator;
SpecificBumpPtrAllocator<IRInstructionDataList> IDLAllocator;
IRInstructionMapper Mapper(&InstDataAllocator, &IDLAllocator);
getVectors(*M, Mapper, InstrList, UnsignedVec);
ASSERT_TRUE(InstrList.size() == UnsignedVec.size());
ASSERT_TRUE(UnsignedVec.size() == 3);
ASSERT_TRUE(UnsignedVec[0] == UnsignedVec[1]);
}
// Checks that stores that have the same type are mapped to the same unsigned
// integer.
TEST(IRInstructionMapper, StoreSimilarType) {
StringRef ModuleString = R"(
define i32 @f(i32* %a, i32* %b) {
bb0:
store i32 1, i32* %a
store i32 2, i32* %a
ret i32 0
})";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<IRInstructionData *> InstrList;
std::vector<unsigned> UnsignedVec;
SpecificBumpPtrAllocator<IRInstructionData> InstDataAllocator;
SpecificBumpPtrAllocator<IRInstructionDataList> IDLAllocator;
IRInstructionMapper Mapper(&InstDataAllocator, &IDLAllocator);
getVectors(*M, Mapper, InstrList, UnsignedVec);
ASSERT_TRUE(InstrList.size() == UnsignedVec.size());
ASSERT_TRUE(UnsignedVec.size() == 3);
ASSERT_TRUE(UnsignedVec[0] == UnsignedVec[1]);
}
// Checks that stores that have the different types are mapped to
// different unsigned integers.
TEST(IRInstructionMapper, StoreDifferentType) {
StringRef ModuleString = R"(
define i32 @f(i32* %a, i64* %b) {
bb0:
store i32 1, i32* %a
store i64 1, i64* %b
ret i32 0
})";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<IRInstructionData *> InstrList;
std::vector<unsigned> UnsignedVec;
SpecificBumpPtrAllocator<IRInstructionData> InstDataAllocator;
SpecificBumpPtrAllocator<IRInstructionDataList> IDLAllocator;
IRInstructionMapper Mapper(&InstDataAllocator, &IDLAllocator);
getVectors(*M, Mapper, InstrList, UnsignedVec);
ASSERT_TRUE(InstrList.size() == UnsignedVec.size());
ASSERT_TRUE(UnsignedVec.size() == 3);
ASSERT_TRUE(UnsignedVec[0] != UnsignedVec[1]);
}
// Checks that stores that have the different aligns are mapped to different
// unsigned integers.
TEST(IRInstructionMapper, StoreDifferentAlign) {
StringRef ModuleString = R"(
define i32 @f(i32* %a, i32* %b) {
bb0:
store i32 1, i32* %a, align 4
store i32 1, i32* %b, align 8
ret i32 0
})";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<IRInstructionData *> InstrList;
std::vector<unsigned> UnsignedVec;
SpecificBumpPtrAllocator<IRInstructionData> InstDataAllocator;
SpecificBumpPtrAllocator<IRInstructionDataList> IDLAllocator;
IRInstructionMapper Mapper(&InstDataAllocator, &IDLAllocator);
getVectors(*M, Mapper, InstrList, UnsignedVec);
ASSERT_TRUE(InstrList.size() == UnsignedVec.size());
ASSERT_TRUE(UnsignedVec.size() == 3);
ASSERT_TRUE(UnsignedVec[0] != UnsignedVec[1]);
}
// Checks that stores that have the different volatile settings are mapped to
// different unsigned integers.
TEST(IRInstructionMapper, StoreDifferentVolatile) {
StringRef ModuleString = R"(
define i32 @f(i32* %a, i32* %b) {
bb0:
store volatile i32 1, i32* %a
store i32 1, i32* %b
ret i32 0
})";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<IRInstructionData *> InstrList;
std::vector<unsigned> UnsignedVec;
SpecificBumpPtrAllocator<IRInstructionData> InstDataAllocator;
SpecificBumpPtrAllocator<IRInstructionDataList> IDLAllocator;
IRInstructionMapper Mapper(&InstDataAllocator, &IDLAllocator);
getVectors(*M, Mapper, InstrList, UnsignedVec);
ASSERT_TRUE(InstrList.size() == UnsignedVec.size());
ASSERT_TRUE(UnsignedVec.size() == 3);
ASSERT_TRUE(UnsignedVec[0] != UnsignedVec[1]);
}
// Checks that stores that have the same volatile settings are mapped to
// different unsigned integers.
TEST(IRInstructionMapper, StoreSameVolatile) {
StringRef ModuleString = R"(
define i32 @f(i32* %a, i32* %b) {
bb0:
store volatile i32 1, i32* %a
store volatile i32 1, i32* %b
ret i32 0
})";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<IRInstructionData *> InstrList;
std::vector<unsigned> UnsignedVec;
SpecificBumpPtrAllocator<IRInstructionData> InstDataAllocator;
SpecificBumpPtrAllocator<IRInstructionDataList> IDLAllocator;
IRInstructionMapper Mapper(&InstDataAllocator, &IDLAllocator);
getVectors(*M, Mapper, InstrList, UnsignedVec);
ASSERT_TRUE(InstrList.size() == UnsignedVec.size());
ASSERT_TRUE(UnsignedVec.size() == 3);
ASSERT_TRUE(UnsignedVec[0] == UnsignedVec[1]);
}
// Checks that loads that have the same atomicity settings are mapped to
// different unsigned integers.
TEST(IRInstructionMapper, StoreSameAtomic) {
StringRef ModuleString = R"(
define i32 @f(i32* %a, i32* %b) {
bb0:
store atomic i32 1, i32* %a unordered, align 4
store atomic i32 1, i32* %b unordered, align 4
ret i32 0
})";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<IRInstructionData *> InstrList;
std::vector<unsigned> UnsignedVec;
SpecificBumpPtrAllocator<IRInstructionData> InstDataAllocator;
SpecificBumpPtrAllocator<IRInstructionDataList> IDLAllocator;
IRInstructionMapper Mapper(&InstDataAllocator, &IDLAllocator);
getVectors(*M, Mapper, InstrList, UnsignedVec);
ASSERT_TRUE(InstrList.size() == UnsignedVec.size());
ASSERT_TRUE(UnsignedVec.size() == 3);
ASSERT_TRUE(UnsignedVec[0] == UnsignedVec[1]);
}
// Checks that loads that have the different atomicity settings are mapped to
// different unsigned integers.
TEST(IRInstructionMapper, StoreDifferentAtomic) {
StringRef ModuleString = R"(
define i32 @f(i32* %a, i32* %b) {
bb0:
store atomic i32 1, i32* %a unordered, align 4
store atomic i32 1, i32* %b monotonic, align 4
ret i32 0
})";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<IRInstructionData *> InstrList;
std::vector<unsigned> UnsignedVec;
SpecificBumpPtrAllocator<IRInstructionData> InstDataAllocator;
SpecificBumpPtrAllocator<IRInstructionDataList> IDLAllocator;
IRInstructionMapper Mapper(&InstDataAllocator, &IDLAllocator);
getVectors(*M, Mapper, InstrList, UnsignedVec);
ASSERT_TRUE(InstrList.size() == UnsignedVec.size());
ASSERT_TRUE(UnsignedVec.size() == 3);
ASSERT_TRUE(UnsignedVec[0] != UnsignedVec[1]);
}
// In most cases, the illegal instructions we are collecting don't require any
// sort of setup. In these cases, we can just only have illegal instructions,
// and the mapper will create 0 length vectors, and we can check that.
// In cases where we have legal instructions needed to set up the illegal
// instruction, to check illegal instructions are assigned unsigned integers
// from the maximum value decreasing to 0, it will be greater than a legal
// instruction that comes after. So to check that we have an illegal
// instruction, we place a legal instruction after an illegal instruction, and
// check that the illegal unsigned integer is greater than the unsigned integer
// of the legal instruction.
// Checks that the branch is mapped to be illegal since there is extra checking
// needed to ensure that a branch in one region is branching to an isomorphic
// location in a different region.
TEST(IRInstructionMapper, BranchIllegal) {
StringRef ModuleString = R"(
define i32 @f(i32 %a, i32 %b) {
bb0:
%0 = icmp slt i32 %a, %b
br i1 %0, label %bb0, label %bb1
bb1:
ret i32 0
})";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<IRInstructionData *> InstrList;
std::vector<unsigned> UnsignedVec;
SpecificBumpPtrAllocator<IRInstructionData> InstDataAllocator;
SpecificBumpPtrAllocator<IRInstructionDataList> IDLAllocator;
IRInstructionMapper Mapper(&InstDataAllocator, &IDLAllocator);
getVectors(*M, Mapper, InstrList, UnsignedVec);
ASSERT_EQ(InstrList.size(), UnsignedVec.size());
ASSERT_EQ(UnsignedVec.size(), static_cast<unsigned>(0));
}
// Checks that a PHINode is mapped to be illegal since there is extra checking
// needed to ensure that a branch in one region is bin an isomorphic
// location in a different region.
TEST(IRInstructionMapper, PhiIllegal) {
StringRef ModuleString = R"(
define i32 @f(i32 %a, i32 %b) {
bb0:
%0 = phi i1 [ 0, %bb0 ], [ %0, %bb1 ]
ret i32 0
bb1:
ret i32 1
})";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<IRInstructionData *> InstrList;
std::vector<unsigned> UnsignedVec;
SpecificBumpPtrAllocator<IRInstructionData> InstDataAllocator;
SpecificBumpPtrAllocator<IRInstructionDataList> IDLAllocator;
IRInstructionMapper Mapper(&InstDataAllocator, &IDLAllocator);
getVectors(*M, Mapper, InstrList, UnsignedVec);
ASSERT_EQ(InstrList.size(), UnsignedVec.size());
ASSERT_EQ(UnsignedVec.size(), static_cast<unsigned>(0));
}
// Checks that an alloca instruction is mapped to be illegal.
TEST(IRInstructionMapper, AllocaIllegal) {
StringRef ModuleString = R"(
define i32 @f(i32 %a, i32 %b) {
bb0:
%0 = alloca i32
ret i32 0
})";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<IRInstructionData *> InstrList;
std::vector<unsigned> UnsignedVec;
SpecificBumpPtrAllocator<IRInstructionData> InstDataAllocator;
SpecificBumpPtrAllocator<IRInstructionDataList> IDLAllocator;
IRInstructionMapper Mapper(&InstDataAllocator, &IDLAllocator);
getVectors(*M, Mapper, InstrList, UnsignedVec);
ASSERT_EQ(InstrList.size(), UnsignedVec.size());
ASSERT_EQ(UnsignedVec.size(), static_cast<unsigned>(0));
}
// Checks that an getelementptr instruction is mapped to be legal. And that
// the operands in getelementpointer instructions are the exact same after the
// first element operand, which only requires the same type.
TEST(IRInstructionMapper, GetElementPtrSameEndOperands) {
StringRef ModuleString = R"(
%struct.RT = type { i8, [10 x [20 x i32]], i8 }
%struct.ST = type { i32, double, %struct.RT }
define i32 @f(%struct.ST* %s, i64 %a, i64 %b) {
bb0:
%0 = getelementptr inbounds %struct.ST, %struct.ST* %s, i64 %a, i32 0
%1 = getelementptr inbounds %struct.ST, %struct.ST* %s, i64 %b, i32 0
ret i32 0
})";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<IRInstructionData *> InstrList;
std::vector<unsigned> UnsignedVec;
SpecificBumpPtrAllocator<IRInstructionData> InstDataAllocator;
SpecificBumpPtrAllocator<IRInstructionDataList> IDLAllocator;
IRInstructionMapper Mapper(&InstDataAllocator, &IDLAllocator);
getVectors(*M, Mapper, InstrList, UnsignedVec);
ASSERT_EQ(InstrList.size(), UnsignedVec.size());
ASSERT_EQ(UnsignedVec.size(), static_cast<unsigned>(3));
ASSERT_EQ(UnsignedVec[0], UnsignedVec[1]);
}
// Check that when the operands in getelementpointer instructions are not the
// exact same after the first element operand, the instructions are mapped to
// different values.
TEST(IRInstructionMapper, GetElementPtrDifferentEndOperands) {
StringRef ModuleString = R"(
%struct.RT = type { i8, [10 x [20 x i32]], i8 }
%struct.ST = type { i32, double, %struct.RT }
define i32 @f(%struct.ST* %s, i64 %a, i64 %b) {
bb0:
%0 = getelementptr inbounds %struct.ST, %struct.ST* %s, i64 %a, i32 0
%1 = getelementptr inbounds %struct.ST, %struct.ST* %s, i64 %b, i32 2
ret i32 0
})";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<IRInstructionData *> InstrList;
std::vector<unsigned> UnsignedVec;
SpecificBumpPtrAllocator<IRInstructionData> InstDataAllocator;
SpecificBumpPtrAllocator<IRInstructionDataList> IDLAllocator;
IRInstructionMapper Mapper(&InstDataAllocator, &IDLAllocator);
getVectors(*M, Mapper, InstrList, UnsignedVec);
ASSERT_EQ(InstrList.size(), UnsignedVec.size());
ASSERT_EQ(UnsignedVec.size(), static_cast<unsigned>(3));
ASSERT_NE(UnsignedVec[0], UnsignedVec[1]);
}
// Check that when the operands in getelementpointer instructions are not the
// same initial base type, each instruction is mapped to a different value.
TEST(IRInstructionMapper, GetElementPtrDifferentBaseType) {
StringRef ModuleString = R"(
%struct.RT = type { i8, [10 x [20 x i32]], i8 }
%struct.ST = type { i32, double, %struct.RT }
define i32 @f(%struct.ST* %s, %struct.RT* %r, i64 %a, i64 %b) {
bb0:
%0 = getelementptr inbounds %struct.ST, %struct.ST* %s, i64 %a
%1 = getelementptr inbounds %struct.RT, %struct.RT* %r, i64 %b
ret i32 0
})";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<IRInstructionData *> InstrList;
std::vector<unsigned> UnsignedVec;
SpecificBumpPtrAllocator<IRInstructionData> InstDataAllocator;
SpecificBumpPtrAllocator<IRInstructionDataList> IDLAllocator;
IRInstructionMapper Mapper(&InstDataAllocator, &IDLAllocator);
getVectors(*M, Mapper, InstrList, UnsignedVec);
ASSERT_EQ(InstrList.size(), UnsignedVec.size());
ASSERT_EQ(UnsignedVec.size(), static_cast<unsigned>(3));
ASSERT_NE(UnsignedVec[0], UnsignedVec[1]);
}
// Check that when the operands in getelementpointer instructions do not have
// the same inbounds modifier, they are not counted as the same.
TEST(IRInstructionMapper, GetElementPtrDifferentInBounds) {
StringRef ModuleString = R"(
%struct.RT = type { i8, [10 x [20 x i32]], i8 }
%struct.ST = type { i32, double, %struct.RT }
define i32 @f(%struct.ST* %s, %struct.RT* %r, i64 %a, i64 %b) {
bb0:
%0 = getelementptr inbounds %struct.ST, %struct.ST* %s, i64 %a, i32 0
%1 = getelementptr %struct.ST, %struct.ST* %s, i64 %b, i32 0
ret i32 0
})";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<IRInstructionData *> InstrList;
std::vector<unsigned> UnsignedVec;
SpecificBumpPtrAllocator<IRInstructionData> InstDataAllocator;
SpecificBumpPtrAllocator<IRInstructionDataList> IDLAllocator;
IRInstructionMapper Mapper(&InstDataAllocator, &IDLAllocator);
getVectors(*M, Mapper, InstrList, UnsignedVec);
ASSERT_EQ(InstrList.size(), UnsignedVec.size());
ASSERT_EQ(UnsignedVec.size(), static_cast<unsigned>(3));
ASSERT_NE(UnsignedVec[0], UnsignedVec[1]);
}
// Checks that indirect call instructions are mapped to be illegal since we
// cannot guarantee the same function in two different cases.
TEST(IRInstructionMapper, CallsIllegalIndirect) {
StringRef ModuleString = R"(
define i32 @f(void()* %func) {
bb0:
call void %func()
ret i32 0
})";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<IRInstructionData *> InstrList;
std::vector<unsigned> UnsignedVec;
SpecificBumpPtrAllocator<IRInstructionData> InstDataAllocator;
SpecificBumpPtrAllocator<IRInstructionDataList> IDLAllocator;
IRInstructionMapper Mapper(&InstDataAllocator, &IDLAllocator);
getVectors(*M, Mapper, InstrList, UnsignedVec);
ASSERT_EQ(InstrList.size(), UnsignedVec.size());
ASSERT_EQ(UnsignedVec.size(), static_cast<unsigned>(0));
}
// Checks that a call instruction is mapped to be legal. Here we check that
// a call with the same name, and same types are mapped to the same
// value.
TEST(IRInstructionMapper, CallsSameTypeSameName) {
StringRef ModuleString = R"(
declare i32 @f1(i32, i32)
define i32 @f(i32 %a, i32 %b) {
bb0:
%0 = call i32 @f1(i32 %a, i32 %b)
%1 = call i32 @f1(i32 %a, i32 %b)
ret i32 0
})";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<IRInstructionData *> InstrList;
std::vector<unsigned> UnsignedVec;
SpecificBumpPtrAllocator<IRInstructionData> InstDataAllocator;
SpecificBumpPtrAllocator<IRInstructionDataList> IDLAllocator;
IRInstructionMapper Mapper(&InstDataAllocator, &IDLAllocator);
getVectors(*M, Mapper, InstrList, UnsignedVec);
ASSERT_EQ(InstrList.size(), UnsignedVec.size());
ASSERT_EQ(UnsignedVec.size(), static_cast<unsigned>(3));
ASSERT_EQ(UnsignedVec[0], UnsignedVec[1]);
}
// Here we check that a calls with different names, but the same arguments types
// are mapped to different value.
TEST(IRInstructionMapper, CallsSameArgTypeDifferentName) {
StringRef ModuleString = R"(
declare i32 @f1(i32, i32)
declare i32 @f2(i32, i32)
define i32 @f(i32 %a, i32 %b) {
bb0:
%0 = call i32 @f1(i32 %a, i32 %b)
%1 = call i32 @f2(i32 %a, i32 %b)
ret i32 0
})";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<IRInstructionData *> InstrList;
std::vector<unsigned> UnsignedVec;
SpecificBumpPtrAllocator<IRInstructionData> InstDataAllocator;
SpecificBumpPtrAllocator<IRInstructionDataList> IDLAllocator;
IRInstructionMapper Mapper(&InstDataAllocator, &IDLAllocator);
getVectors(*M, Mapper, InstrList, UnsignedVec);
ASSERT_EQ(InstrList.size(), UnsignedVec.size());
ASSERT_EQ(UnsignedVec.size(), static_cast<unsigned>(3));
ASSERT_NE(UnsignedVec[0], UnsignedVec[1]);
}
// Here we check that a calls with different names, and different arguments
// types are mapped to different value.
TEST(IRInstructionMapper, CallsDifferentArgTypeDifferentName) {
StringRef ModuleString = R"(
declare i32 @f1(i32, i32)
declare i32 @f2(i32)
define i32 @f(i32 %a, i32 %b) {
bb0:
%0 = call i32 @f1(i32 %a, i32 %b)
%1 = call i32 @f2(i32 %a)
ret i32 0
})";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<IRInstructionData *> InstrList;
std::vector<unsigned> UnsignedVec;
SpecificBumpPtrAllocator<IRInstructionData> InstDataAllocator;
SpecificBumpPtrAllocator<IRInstructionDataList> IDLAllocator;
IRInstructionMapper Mapper(&InstDataAllocator, &IDLAllocator);
getVectors(*M, Mapper, InstrList, UnsignedVec);
ASSERT_EQ(InstrList.size(), UnsignedVec.size());
ASSERT_EQ(UnsignedVec.size(), static_cast<unsigned>(3));
ASSERT_NE(UnsignedVec[0], UnsignedVec[1]);
}
// Here we check that calls with different names, and different return
// types are mapped to different value.
TEST(IRInstructionMapper, CallsDifferentReturnTypeDifferentName) {
StringRef ModuleString = R"(
declare i64 @f1(i32, i32)
declare i32 @f2(i32, i32)
define i32 @f(i32 %a, i32 %b) {
bb0:
%0 = call i64 @f1(i32 %a, i32 %b)
%1 = call i32 @f2(i32 %a, i32 %b)
ret i32 0
})";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<IRInstructionData *> InstrList;
std::vector<unsigned> UnsignedVec;
SpecificBumpPtrAllocator<IRInstructionData> InstDataAllocator;
SpecificBumpPtrAllocator<IRInstructionDataList> IDLAllocator;
IRInstructionMapper Mapper(&InstDataAllocator, &IDLAllocator);
getVectors(*M, Mapper, InstrList, UnsignedVec);
ASSERT_EQ(InstrList.size(), UnsignedVec.size());
ASSERT_EQ(UnsignedVec.size(), static_cast<unsigned>(3));
ASSERT_NE(UnsignedVec[0], UnsignedVec[1]);
}
// Here we check that calls with the same name, types, and parameters map to the
// same unsigned integer.
TEST(IRInstructionMapper, CallsSameParameters) {
StringRef ModuleString = R"(
declare i32 @f1(i32, i32)
define i32 @f(i32 %a, i32 %b) {
bb0:
%0 = tail call fastcc i32 @f1(i32 %a, i32 %b)
%1 = tail call fastcc i32 @f1(i32 %a, i32 %b)
ret i32 0
})";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<IRInstructionData *> InstrList;
std::vector<unsigned> UnsignedVec;
SpecificBumpPtrAllocator<IRInstructionData> InstDataAllocator;
SpecificBumpPtrAllocator<IRInstructionDataList> IDLAllocator;
IRInstructionMapper Mapper(&InstDataAllocator, &IDLAllocator);
getVectors(*M, Mapper, InstrList, UnsignedVec);
ASSERT_EQ(InstrList.size(), UnsignedVec.size());
ASSERT_EQ(UnsignedVec.size(), static_cast<unsigned>(3));
ASSERT_EQ(UnsignedVec[0], UnsignedVec[1]);
}
// Here we check that calls with different tail call settings are mapped to
// different values.
TEST(IRInstructionMapper, CallsDifferentTails) {
StringRef ModuleString = R"(
declare i32 @f1(i32, i32)
define i32 @f(i32 %a, i32 %b) {
bb0:
%0 = tail call i32 @f1(i32 %a, i32 %b)
%1 = call i32 @f1(i32 %a, i32 %b)
ret i32 0
})";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<IRInstructionData *> InstrList;
std::vector<unsigned> UnsignedVec;
SpecificBumpPtrAllocator<IRInstructionData> InstDataAllocator;
SpecificBumpPtrAllocator<IRInstructionDataList> IDLAllocator;
IRInstructionMapper Mapper(&InstDataAllocator, &IDLAllocator);
getVectors(*M, Mapper, InstrList, UnsignedVec);
ASSERT_EQ(InstrList.size(), UnsignedVec.size());
ASSERT_EQ(UnsignedVec.size(), static_cast<unsigned>(3));
ASSERT_NE(UnsignedVec[0], UnsignedVec[1]);
}
// Here we check that calls with different calling convention settings are
// mapped to different values.
TEST(IRInstructionMapper, CallsDifferentCallingConventions) {
StringRef ModuleString = R"(
declare i32 @f1(i32, i32)
define i32 @f(i32 %a, i32 %b) {
bb0:
%0 = call fastcc i32 @f1(i32 %a, i32 %b)
%1 = call i32 @f1(i32 %a, i32 %b)
ret i32 0
})";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<IRInstructionData *> InstrList;
std::vector<unsigned> UnsignedVec;
SpecificBumpPtrAllocator<IRInstructionData> InstDataAllocator;
SpecificBumpPtrAllocator<IRInstructionDataList> IDLAllocator;
IRInstructionMapper Mapper(&InstDataAllocator, &IDLAllocator);
getVectors(*M, Mapper, InstrList, UnsignedVec);
ASSERT_EQ(InstrList.size(), UnsignedVec.size());
ASSERT_EQ(UnsignedVec.size(), static_cast<unsigned>(3));
ASSERT_NE(UnsignedVec[0], UnsignedVec[1]);
}
// Checks that an invoke instruction is mapped to be illegal. Invoke
// instructions are considered to be illegal because of the change in the
// control flow that is currently not recognized.
TEST(IRInstructionMapper, InvokeIllegal) {
StringRef ModuleString = R"(
define i32 @f(i8 *%gep1, i32 %b) {
then:
invoke i32 undef(i8* undef)
to label %invoke unwind label %lpad
invoke:
unreachable
lpad:
landingpad { i8*, i32 }
catch i8* null
unreachable
})";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<IRInstructionData *> InstrList;
std::vector<unsigned> UnsignedVec;
SpecificBumpPtrAllocator<IRInstructionData> InstDataAllocator;
SpecificBumpPtrAllocator<IRInstructionDataList> IDLAllocator;
IRInstructionMapper Mapper(&InstDataAllocator, &IDLAllocator);
getVectors(*M, Mapper, InstrList, UnsignedVec);
ASSERT_EQ(InstrList.size(), UnsignedVec.size());
ASSERT_EQ(UnsignedVec.size(), static_cast<unsigned>(0));
}
// Checks that an callbr instructions are considered to be illegal. Callbr
// instructions are considered to be illegal because of the change in the
// control flow that is currently not recognized.
TEST(IRInstructionMapper, CallBrInstIllegal) {
StringRef ModuleString = R"(
define void @test() {
fail:
ret void
}
define i32 @f(i32 %a, i32 %b) {
bb0:
callbr void asm "xorl $0, $0; jmp ${1:l}", "r,X,~{dirflag},~{fpsr},~{flags}"(i32 %a, i8* blockaddress(@test, %fail)) to label %normal [label %fail]
fail:
ret i32 0
normal:
ret i32 0
})";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<IRInstructionData *> InstrList;
std::vector<unsigned> UnsignedVec;
SpecificBumpPtrAllocator<IRInstructionData> InstDataAllocator;
SpecificBumpPtrAllocator<IRInstructionDataList> IDLAllocator;
IRInstructionMapper Mapper(&InstDataAllocator, &IDLAllocator);
getVectors(*M, Mapper, InstrList, UnsignedVec);
ASSERT_EQ(InstrList.size(), UnsignedVec.size());
ASSERT_EQ(UnsignedVec.size(), static_cast<unsigned>(0));
}
// Checks that an debuginfo intrinsics are mapped to be invisible. Since they
// do not semantically change the program, they can be recognized as similar.
TEST(IRInstructionMapper, DebugInfoInvisible) {
StringRef ModuleString = R"(
define i32 @f(i32 %a, i32 %b) {
then:
%0 = add i32 %a, %b
call void @llvm.dbg.value(metadata !0)
%1 = add i32 %a, %b
ret i32 0
}
declare void @llvm.dbg.value(metadata)
!0 = distinct !{!"test\00", i32 10})";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<IRInstructionData *> InstrList;
std::vector<unsigned> UnsignedVec;
SpecificBumpPtrAllocator<IRInstructionData> InstDataAllocator;
SpecificBumpPtrAllocator<IRInstructionDataList> IDLAllocator;
IRInstructionMapper Mapper(&InstDataAllocator, &IDLAllocator);
getVectors(*M, Mapper, InstrList, UnsignedVec);
ASSERT_EQ(InstrList.size(), UnsignedVec.size());
ASSERT_EQ(UnsignedVec.size(), static_cast<unsigned>(3));
}
// The following are all exception handling intrinsics. We do not currently
// handle these instruction because they are very context dependent.
// Checks that an eh.typeid.for intrinsic is mapped to be illegal.
TEST(IRInstructionMapper, ExceptionHandlingTypeIdIllegal) {
StringRef ModuleString = R"(
@_ZTIi = external constant i8*
define i32 @f() {
then:
%0 = call i32 @llvm.eh.typeid.for(i8* bitcast (i8** @_ZTIi to i8*))
ret i32 0
}
declare i32 @llvm.eh.typeid.for(i8*))";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<IRInstructionData *> InstrList;
std::vector<unsigned> UnsignedVec;
SpecificBumpPtrAllocator<IRInstructionData> InstDataAllocator;
SpecificBumpPtrAllocator<IRInstructionDataList> IDLAllocator;
IRInstructionMapper Mapper(&InstDataAllocator, &IDLAllocator);
getVectors(*M, Mapper, InstrList, UnsignedVec);
ASSERT_EQ(InstrList.size(), UnsignedVec.size());
ASSERT_EQ(UnsignedVec.size(), static_cast<unsigned>(0));
}
// Checks that an eh.exceptioncode intrinsic is mapped to be illegal.
TEST(IRInstructionMapper, ExceptionHandlingExceptionCodeIllegal) {
StringRef ModuleString = R"(
define i32 @f(i32 %a, i32 %b) {
entry:
%0 = catchswitch within none [label %__except] unwind to caller
__except:
%1 = catchpad within %0 [i8* null]
catchret from %1 to label %__except
then:
%2 = call i32 @llvm.eh.exceptioncode(token %1)
ret i32 0
}
declare i32 @llvm.eh.exceptioncode(token))";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<IRInstructionData *> InstrList;
std::vector<unsigned> UnsignedVec;
SpecificBumpPtrAllocator<IRInstructionData> InstDataAllocator;
SpecificBumpPtrAllocator<IRInstructionDataList> IDLAllocator;
IRInstructionMapper Mapper(&InstDataAllocator, &IDLAllocator);
getVectors(*M, Mapper, InstrList, UnsignedVec);
ASSERT_EQ(InstrList.size(), UnsignedVec.size());
ASSERT_EQ(UnsignedVec.size(), static_cast<unsigned>(0));
}
// Checks that an eh.unwind intrinsic is mapped to be illegal.
TEST(IRInstructionMapper, ExceptionHandlingUnwindIllegal) {
StringRef ModuleString = R"(
define i32 @f(i32 %a, i32 %b) {
entry:
call void @llvm.eh.unwind.init()
ret i32 0
}
declare void @llvm.eh.unwind.init())";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<IRInstructionData *> InstrList;
std::vector<unsigned> UnsignedVec;
SpecificBumpPtrAllocator<IRInstructionData> InstDataAllocator;
SpecificBumpPtrAllocator<IRInstructionDataList> IDLAllocator;
IRInstructionMapper Mapper(&InstDataAllocator, &IDLAllocator);
getVectors(*M, Mapper, InstrList, UnsignedVec);
ASSERT_EQ(InstrList.size(), UnsignedVec.size());
ASSERT_EQ(UnsignedVec.size(), static_cast<unsigned>(0));
}
// Checks that an eh.exceptionpointer intrinsic is mapped to be illegal.
TEST(IRInstructionMapper, ExceptionHandlingExceptionPointerIllegal) {
StringRef ModuleString = R"(
define i32 @f(i32 %a, i32 %b) {
entry:
%0 = call i8* @llvm.eh.exceptionpointer.p0i8(i32 0)
ret i32 0
}
declare i8* @llvm.eh.exceptionpointer.p0i8(i32))";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<IRInstructionData *> InstrList;
std::vector<unsigned> UnsignedVec;
SpecificBumpPtrAllocator<IRInstructionData> InstDataAllocator;
SpecificBumpPtrAllocator<IRInstructionDataList> IDLAllocator;
IRInstructionMapper Mapper(&InstDataAllocator, &IDLAllocator);
getVectors(*M, Mapper, InstrList, UnsignedVec);
ASSERT_EQ(InstrList.size(), UnsignedVec.size());
ASSERT_EQ(UnsignedVec.size(), static_cast<unsigned>(0));
}
// Checks that a catchpad instruction is mapped to an illegal value.
TEST(IRInstructionMapper, CatchpadIllegal) {
StringRef ModuleString = R"(
declare void @llvm.donothing() nounwind readnone
define void @function() personality i8 3 {
entry:
invoke void @llvm.donothing() to label %normal unwind label %exception
exception:
%cs1 = catchswitch within none [label %catchpad1] unwind to caller
catchpad1:
catchpad within %cs1 []
br label %normal
normal:
ret void
})";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<IRInstructionData *> InstrList;
std::vector<unsigned> UnsignedVec;
SpecificBumpPtrAllocator<IRInstructionData> InstDataAllocator;
SpecificBumpPtrAllocator<IRInstructionDataList> IDLAllocator;
IRInstructionMapper Mapper(&InstDataAllocator, &IDLAllocator);
getVectors(*M, Mapper, InstrList, UnsignedVec);
ASSERT_EQ(InstrList.size(), UnsignedVec.size());
ASSERT_EQ(UnsignedVec.size(), static_cast<unsigned>(0));
}
// Checks that a cleanuppad instruction is mapped to an illegal value.
TEST(IRInstructionMapper, CleanuppadIllegal) {
StringRef ModuleString = R"(
declare void @llvm.donothing() nounwind readnone
define void @function() personality i8 3 {
entry:
invoke void @llvm.donothing() to label %normal unwind label %exception
exception:
%cs1 = catchswitch within none [label %catchpad1] unwind to caller
catchpad1:
%clean = cleanuppad within none []
br label %normal
normal:
ret void
})";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<IRInstructionData *> InstrList;
std::vector<unsigned> UnsignedVec;
SpecificBumpPtrAllocator<IRInstructionData> InstDataAllocator;
SpecificBumpPtrAllocator<IRInstructionDataList> IDLAllocator;
IRInstructionMapper Mapper(&InstDataAllocator, &IDLAllocator);
getVectors(*M, Mapper, InstrList, UnsignedVec);
ASSERT_EQ(InstrList.size(), UnsignedVec.size());
ASSERT_EQ(UnsignedVec.size(), static_cast<unsigned>(0));
}
// The following three instructions are memory transfer and setting based, which
// are considered illegal since is extra checking needed to handle the address
// space checking.
// Checks that a memset instruction is mapped to an illegal value.
TEST(IRInstructionMapper, MemSetIllegal) {
StringRef ModuleString = R"(
declare void @llvm.memset.p0i8.i64(i8* nocapture writeonly, i8, i64, i32, i1)
define i64 @function(i64 %x, i64 %z, i64 %n) {
entry:
%pool = alloca [59 x i64], align 4
%tmp = bitcast [59 x i64]* %pool to i8*
call void @llvm.memset.p0i8.i64(i8* nonnull %tmp, i8 0, i64 236, i32 4, i1 false)
%cmp3 = icmp eq i64 %n, 0
%a = add i64 %x, %z
%c = add i64 %x, %z
ret i64 0
})";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<IRInstructionData *> InstrList;
std::vector<unsigned> UnsignedVec;
SpecificBumpPtrAllocator<IRInstructionData> InstDataAllocator;
SpecificBumpPtrAllocator<IRInstructionDataList> IDLAllocator;
IRInstructionMapper Mapper(&InstDataAllocator, &IDLAllocator);
getVectors(*M, Mapper, InstrList, UnsignedVec);
ASSERT_EQ(InstrList.size(), UnsignedVec.size());
ASSERT_EQ(UnsignedVec.size(), static_cast<unsigned>(6));
ASSERT_TRUE(UnsignedVec[2] < UnsignedVec[1]);
}
// Checks that a memcpy instruction is mapped to an illegal value.
TEST(IRInstructionMapper, MemCpyIllegal) {
StringRef ModuleString = R"(
declare void @llvm.memcpy.p0i8.i64(i8* nocapture writeonly, i8, i64, i32, i1)
define i64 @function(i64 %x, i64 %z, i64 %n) {
entry:
%pool = alloca [59 x i64], align 4
%tmp = bitcast [59 x i64]* %pool to i8*
call void @llvm.memcpy.p0i8.i64(i8* nonnull %tmp, i8 0, i64 236, i32 4, i1 false)
%cmp3 = icmp eq i64 %n, 0
%a = add i64 %x, %z
%c = add i64 %x, %z
ret i64 0
})";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<IRInstructionData *> InstrList;
std::vector<unsigned> UnsignedVec;
SpecificBumpPtrAllocator<IRInstructionData> InstDataAllocator;
SpecificBumpPtrAllocator<IRInstructionDataList> IDLAllocator;
IRInstructionMapper Mapper(&InstDataAllocator, &IDLAllocator);
getVectors(*M, Mapper, InstrList, UnsignedVec);
ASSERT_EQ(InstrList.size(), UnsignedVec.size());
ASSERT_EQ(UnsignedVec.size(), static_cast<unsigned>(6));
ASSERT_TRUE(UnsignedVec[2] < UnsignedVec[1]);
}
// Checks that a memmove instruction is mapped to an illegal value.
TEST(IRInstructionMapper, MemMoveIllegal) {
StringRef ModuleString = R"(
declare void @llvm.memmove.p0i8.i64(i8* nocapture writeonly, i8, i64, i32, i1)
define i64 @function(i64 %x, i64 %z, i64 %n) {
entry:
%pool = alloca [59 x i64], align 4
%tmp = bitcast [59 x i64]* %pool to i8*
call void @llvm.memmove.p0i8.i64(i8* nonnull %tmp, i8 0, i64 236, i32 4, i1 false)
%cmp3 = icmp eq i64 %n, 0
%a = add i64 %x, %z
%c = add i64 %x, %z
ret i64 0
})";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<IRInstructionData *> InstrList;
std::vector<unsigned> UnsignedVec;
SpecificBumpPtrAllocator<IRInstructionData> InstDataAllocator;
SpecificBumpPtrAllocator<IRInstructionDataList> IDLAllocator;
IRInstructionMapper Mapper(&InstDataAllocator, &IDLAllocator);
getVectors(*M, Mapper, InstrList, UnsignedVec);
ASSERT_EQ(InstrList.size(), UnsignedVec.size());
ASSERT_EQ(UnsignedVec.size(), static_cast<unsigned>(6));
ASSERT_TRUE(UnsignedVec[2] < UnsignedVec[1]);
}
// Checks that a variable argument instructions are mapped to an illegal value.
// We exclude variable argument instructions since variable arguments
// requires extra checking of the argument list.
TEST(IRInstructionMapper, VarArgsIllegal) {
StringRef ModuleString = R"(
declare void @llvm.va_start(i8*)
declare void @llvm.va_copy(i8*, i8*)
declare void @llvm.va_end(i8*)
define i32 @func1(i32 %a, double %b, i8* %v, ...) nounwind {
entry:
%a.addr = alloca i32, align 4
%b.addr = alloca double, align 8
%ap = alloca i8*, align 4
%c = alloca i32, align 4
store i32 %a, i32* %a.addr, align 4
store double %b, double* %b.addr, align 8
%ap1 = bitcast i8** %ap to i8*
call void @llvm.va_start(i8* %ap1)
store double %b, double* %b.addr, align 8
store double %b, double* %b.addr, align 8
%0 = va_arg i8** %ap, i32
store double %b, double* %b.addr, align 8
store double %b, double* %b.addr, align 8
call void @llvm.va_copy(i8* %v, i8* %ap1)
store double %b, double* %b.addr, align 8
store double %b, double* %b.addr, align 8
call void @llvm.va_end(i8* %ap1)
store i32 %0, i32* %c, align 4
%tmp = load i32, i32* %c, align 4
ret i32 %tmp
})";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<IRInstructionData *> InstrList;
std::vector<unsigned> UnsignedVec;
SpecificBumpPtrAllocator<IRInstructionData> InstDataAllocator;
SpecificBumpPtrAllocator<IRInstructionDataList> IDLAllocator;
IRInstructionMapper Mapper(&InstDataAllocator, &IDLAllocator);
getVectors(*M, Mapper, InstrList, UnsignedVec);
ASSERT_EQ(InstrList.size(), UnsignedVec.size());
ASSERT_EQ(UnsignedVec.size(), static_cast<unsigned>(16));
ASSERT_TRUE(UnsignedVec[4] < UnsignedVec[3]);
ASSERT_TRUE(UnsignedVec[7] < UnsignedVec[6]);
ASSERT_TRUE(UnsignedVec[10] < UnsignedVec[9]);
ASSERT_TRUE(UnsignedVec[13] < UnsignedVec[12]);
}
// Check the length of adding two illegal instructions one after th other. We
// should find that only one element is added for each illegal range.
TEST(IRInstructionMapper, RepeatedIllegalLength) {
StringRef ModuleString = R"(
define i32 @f(i32 %a, i32 %b) {
bb0:
%0 = add i32 %a, %b
%1 = mul i32 %a, %b
%2 = alloca i32
%3 = alloca i32
%4 = add i32 %a, %b
%5 = mul i32 %a, %b
ret i32 0
})";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<IRInstructionData *> InstrList;
std::vector<unsigned> UnsignedVec;
SpecificBumpPtrAllocator<IRInstructionData> InstDataAllocator;
SpecificBumpPtrAllocator<IRInstructionDataList> IDLAllocator;
IRInstructionMapper Mapper(&InstDataAllocator, &IDLAllocator);
getVectors(*M, Mapper, InstrList, UnsignedVec);
// Check that the size of the unsigned vector and the instruction list are the
// same as a safety check.
ASSERT_TRUE(InstrList.size() == UnsignedVec.size());
// Make sure that the unsigned vector is the expected size.
ASSERT_TRUE(UnsignedVec.size() == 6);
}
// A helper function that accepts an instruction list from a module made up of
// two blocks of two legal instructions and terminator, and checks them for
// instruction similarity.
static bool longSimCandCompare(std::vector<IRInstructionData *> &InstrList,
bool Structure = false) {
std::vector<IRInstructionData *>::iterator Start, End;
Start = InstrList.begin();
End = InstrList.begin();
std::advance(End, 1);
IRSimilarityCandidate Cand1(0, 2, *Start, *End);
Start = InstrList.begin();
End = InstrList.begin();
std::advance(Start, 3);
std::advance(End, 4);
IRSimilarityCandidate Cand2(3, 2, *Start, *End);
if (Structure)
return IRSimilarityCandidate::compareStructure(Cand1, Cand2);
return IRSimilarityCandidate::isSimilar(Cand1, Cand2);
}
// Checks that two adds with commuted operands are considered to be the same
// instructions.
TEST(IRSimilarityCandidate, CheckIdenticalInstructions) {
StringRef ModuleString = R"(
define i32 @f(i32 %a, i32 %b) {
bb0:
%0 = add i32 %a, %b
%1 = add i32 %b, %a
ret i32 0
})";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<IRInstructionData *> InstrList;
std::vector<unsigned> UnsignedVec;
SpecificBumpPtrAllocator<IRInstructionData> InstDataAllocator;
SpecificBumpPtrAllocator<IRInstructionDataList> IDLAllocator;
IRInstructionMapper Mapper(&InstDataAllocator, &IDLAllocator);
getVectors(*M, Mapper, InstrList, UnsignedVec);
// Check to make sure that we have a long enough region.
ASSERT_EQ(InstrList.size(), static_cast<unsigned>(3));
// Check that the instructions were added correctly to both vectors.
ASSERT_TRUE(InstrList.size() == UnsignedVec.size());
std::vector<IRInstructionData *>::iterator Start, End;
Start = InstrList.begin();
End = InstrList.begin();
std::advance(End, 1);
IRSimilarityCandidate Cand1(0, 2, *Start, *End);
IRSimilarityCandidate Cand2(0, 2, *Start, *End);
ASSERT_TRUE(IRSimilarityCandidate::isSimilar(Cand1, Cand2));
}
// Checks that comparison instructions are found to be similar instructions
// when the operands are flipped and the predicate is also swapped.
TEST(IRSimilarityCandidate, PredicateIsomorphism) {
StringRef ModuleString = R"(
define i32 @f(i32 %a, i32 %b) {
bb0:
%0 = icmp sgt i32 %a, %b
%1 = add i32 %b, %a
br label %bb1
bb1:
%2 = icmp slt i32 %a, %b
%3 = add i32 %a, %b
ret i32 0
})";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<IRInstructionData *> InstrList;
std::vector<unsigned> UnsignedVec;
SpecificBumpPtrAllocator<IRInstructionData> InstDataAllocator;
SpecificBumpPtrAllocator<IRInstructionDataList> IDLAllocator;
IRInstructionMapper Mapper(&InstDataAllocator, &IDLAllocator);
getVectors(*M, Mapper, InstrList, UnsignedVec);
ASSERT_TRUE(InstrList.size() > 5);
ASSERT_TRUE(InstrList.size() == UnsignedVec.size());
std::vector<IRInstructionData *>::iterator Start, End;
Start = InstrList.begin();
End = InstrList.begin();
std::advance(End, 1);
IRSimilarityCandidate Cand1(0, 2, *Start, *End);
Start = InstrList.begin();
End = InstrList.begin();
std::advance(Start, 3);
std::advance(End, 4);
IRSimilarityCandidate Cand2(3, 2, *Start, *End);
ASSERT_TRUE(IRSimilarityCandidate::isSimilar(Cand1, Cand2));
}
// Checks that IRSimilarityCandidates wrapping these two regions of instructions
// are able to differentiate between instructions that have different opcodes.
TEST(IRSimilarityCandidate, CheckRegionsDifferentInstruction) {
StringRef ModuleString = R"(
define i32 @f(i32 %a, i32 %b) {
bb0:
%0 = add i32 %a, %b
%1 = add i32 %b, %a
ret i32 0
bb1:
%2 = sub i32 %a, %b
%3 = add i32 %b, %a
ret i32 0
})";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<IRInstructionData *> InstrList;
std::vector<unsigned> UnsignedVec;
SpecificBumpPtrAllocator<IRInstructionData> InstDataAllocator;
SpecificBumpPtrAllocator<IRInstructionDataList> IDLAllocator;
IRInstructionMapper Mapper(&InstDataAllocator, &IDLAllocator);
getVectors(*M, Mapper, InstrList, UnsignedVec);
// Check to make sure that we have a long enough region.
ASSERT_EQ(InstrList.size(), static_cast<unsigned>(6));
// Check that the instructions were added correctly to both vectors.
ASSERT_TRUE(InstrList.size() == UnsignedVec.size());
ASSERT_FALSE(longSimCandCompare(InstrList));
}
// Checks that IRSimilarityCandidates wrapping these two regions of instructions
// are able to differentiate between instructions that have different types.
TEST(IRSimilarityCandidate, CheckRegionsDifferentTypes) {
StringRef ModuleString = R"(
define i32 @f(i32 %a, i32 %b, i64 %c, i64 %d) {
bb0:
%0 = add i32 %a, %b
%1 = add i32 %b, %a
ret i32 0
bb1:
%2 = add i64 %c, %d
%3 = add i64 %d, %c
ret i32 0
})";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<IRInstructionData *> InstrList;
std::vector<unsigned> UnsignedVec;
SpecificBumpPtrAllocator<IRInstructionData> InstDataAllocator;
SpecificBumpPtrAllocator<IRInstructionDataList> IDLAllocator;
IRInstructionMapper Mapper(&InstDataAllocator, &IDLAllocator);
getVectors(*M, Mapper, InstrList, UnsignedVec);
// Check to make sure that we have a long enough region.
ASSERT_EQ(InstrList.size(), static_cast<unsigned>(6));
// Check that the instructions were added correctly to both vectors.
ASSERT_TRUE(InstrList.size() == UnsignedVec.size());
ASSERT_FALSE(longSimCandCompare(InstrList));
}
// Check that debug instructions do not impact similarity. They are marked as
// invisible.
TEST(IRSimilarityCandidate, IdenticalWithDebug) {
StringRef ModuleString = R"(
define i32 @f(i32 %a, i32 %b) {
bb0:
%0 = add i32 %a, %b
call void @llvm.dbg.value(metadata !0)
%1 = add i32 %b, %a
ret i32 0
bb1:
%2 = add i32 %a, %b
call void @llvm.dbg.value(metadata !1)
%3 = add i32 %b, %a
ret i32 0
bb2:
%4 = add i32 %a, %b
%5 = add i32 %b, %a
ret i32 0
}
declare void @llvm.dbg.value(metadata)
!0 = distinct !{!"test\00", i32 10}
!1 = distinct !{!"test\00", i32 11})";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<IRInstructionData *> InstrList;
std::vector<unsigned> UnsignedVec;
SpecificBumpPtrAllocator<IRInstructionData> InstDataAllocator;
SpecificBumpPtrAllocator<IRInstructionDataList> IDLAllocator;
IRInstructionMapper Mapper(&InstDataAllocator, &IDLAllocator);
getVectors(*M, Mapper, InstrList, UnsignedVec);
// Check to make sure that we have a long enough region.
ASSERT_EQ(InstrList.size(), static_cast<unsigned>(9));
// Check that the instructions were added correctly to both vectors.
ASSERT_TRUE(InstrList.size() == UnsignedVec.size());
ASSERT_TRUE(longSimCandCompare(InstrList));
}
// Checks that IRSimilarityCandidates that include illegal instructions, are not
// considered to be the same set of instructions. In these sets of instructions
// the allocas are illegal.
TEST(IRSimilarityCandidate, IllegalInCandidate) {
StringRef ModuleString = R"(
define i32 @f(i32 %a, i32 %b) {
bb0:
%0 = add i32 %a, %b
%1 = add i32 %a, %b
%2 = alloca i32
ret i32 0
bb1:
%3 = add i32 %a, %b
%4 = add i32 %a, %b
%5 = alloca i32
ret i32 0
})";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<IRInstructionData *> InstrList;
std::vector<unsigned> UnsignedVec;
SpecificBumpPtrAllocator<IRInstructionData> InstDataAllocator;
SpecificBumpPtrAllocator<IRInstructionDataList> IDLAllocator;
IRInstructionMapper Mapper(&InstDataAllocator, &IDLAllocator);
getVectors(*M, Mapper, InstrList, UnsignedVec);
// Check to make sure that we have a long enough region.
ASSERT_EQ(InstrList.size(), static_cast<unsigned>(6));
// Check that the instructions were added correctly to both vectors.
ASSERT_TRUE(InstrList.size() == UnsignedVec.size());
std::vector<IRInstructionData *>::iterator Start, End;
Start = InstrList.begin();
End = InstrList.begin();
std::advance(End, 2);
IRSimilarityCandidate Cand1(0, 3, *Start, *End);
Start = InstrList.begin();
End = InstrList.begin();
std::advance(Start, 3);
std::advance(End, 5);
IRSimilarityCandidate Cand2(3, 3, *Start, *End);
ASSERT_FALSE(IRSimilarityCandidate::isSimilar(Cand1, Cand2));
}
// Checks that different structure, in this case, where we introduce a new
// needed input in one region, is recognized as different.
TEST(IRSimilarityCandidate, DifferentStructure) {
StringRef ModuleString = R"(
define i32 @f(i32 %a, i32 %b) {
bb0:
%0 = add i32 %a, %b
%1 = add i32 %b, %a
ret i32 0
bb1:
%2 = add i32 %a, %b
%3 = add i32 %b, %0
ret i32 0
})";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<IRInstructionData *> InstrList;
std::vector<unsigned> UnsignedVec;
SpecificBumpPtrAllocator<IRInstructionData> InstDataAllocator;
SpecificBumpPtrAllocator<IRInstructionDataList> IDLAllocator;
IRInstructionMapper Mapper(&InstDataAllocator, &IDLAllocator);
getVectors(*M, Mapper, InstrList, UnsignedVec);
// Check to make sure that we have a long enough region.
ASSERT_EQ(InstrList.size(), static_cast<unsigned>(6));
// Check that the instructions were added correctly to both vectors.
ASSERT_TRUE(InstrList.size() == UnsignedVec.size());
ASSERT_FALSE(longSimCandCompare(InstrList, true));
}
// Checks that comparison instructions are found to have the same structure
// when the operands are flipped and the predicate is also swapped.
TEST(IRSimilarityCandidate, PredicateIsomorphismStructure) {
StringRef ModuleString = R"(
define i32 @f(i32 %a, i32 %b) {
bb0:
%0 = icmp sgt i32 %a, %b
%1 = add i32 %a, %b
br label %bb1
bb1:
%2 = icmp slt i32 %b, %a
%3 = add i32 %a, %b
ret i32 0
})";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<IRInstructionData *> InstrList;
std::vector<unsigned> UnsignedVec;
SpecificBumpPtrAllocator<IRInstructionData> InstDataAllocator;
SpecificBumpPtrAllocator<IRInstructionDataList> IDLAllocator;
IRInstructionMapper Mapper(&InstDataAllocator, &IDLAllocator);
getVectors(*M, Mapper, InstrList, UnsignedVec);
ASSERT_TRUE(InstrList.size() > 5);
ASSERT_TRUE(InstrList.size() == UnsignedVec.size());
ASSERT_TRUE(longSimCandCompare(InstrList, true));
}
// Checks that different predicates are counted as diferent.
TEST(IRSimilarityCandidate, PredicateDifference) {
StringRef ModuleString = R"(
define i32 @f(i32 %a, i32 %b) {
bb0:
%0 = icmp sge i32 %a, %b
%1 = add i32 %b, %a
br label %bb1
bb1:
%2 = icmp slt i32 %b, %a
%3 = add i32 %a, %b
ret i32 0
})";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<IRInstructionData *> InstrList;
std::vector<unsigned> UnsignedVec;
SpecificBumpPtrAllocator<IRInstructionData> InstDataAllocator;
SpecificBumpPtrAllocator<IRInstructionDataList> IDLAllocator;
IRInstructionMapper Mapper(&InstDataAllocator, &IDLAllocator);
getVectors(*M, Mapper, InstrList, UnsignedVec);
ASSERT_TRUE(InstrList.size() > 5);
ASSERT_TRUE(InstrList.size() == UnsignedVec.size());
ASSERT_FALSE(longSimCandCompare(InstrList));
}
// Checks that the same structure is recognized between two candidates. The
// items %a and %b are used in the same way in both sets of instructions.
TEST(IRSimilarityCandidate, SameStructure) {
StringRef ModuleString = R"(
define i32 @f(i32 %a, i32 %b) {
bb0:
%0 = add i32 %a, %b
%1 = sub i32 %b, %a
ret i32 0
bb1:
%2 = add i32 %a, %b
%3 = sub i32 %b, %a
ret i32 0
})";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<IRInstructionData *> InstrList;
std::vector<unsigned> UnsignedVec;
SpecificBumpPtrAllocator<IRInstructionData> InstDataAllocator;
SpecificBumpPtrAllocator<IRInstructionDataList> IDLAllocator;
IRInstructionMapper Mapper(&InstDataAllocator, &IDLAllocator);
getVectors(*M, Mapper, InstrList, UnsignedVec);
// Check to make sure that we have a long enough region.
ASSERT_EQ(InstrList.size(), static_cast<unsigned>(6));
// Check that the instructions were added correctly to both vectors.
ASSERT_TRUE(InstrList.size() == UnsignedVec.size());
ASSERT_TRUE(longSimCandCompare(InstrList, true));
}
// Checks that the same structure is recognized between two candidates. While
// the input names are reversed, they still perform the same overall operation.
TEST(IRSimilarityCandidate, DifferentNameSameStructure) {
StringRef ModuleString = R"(
define i32 @f(i32 %a, i32 %b) {
bb0:
%0 = add i32 %a, %b
%1 = add i32 %b, %a
ret i32 0
bb1:
%2 = add i32 %b, %a
%3 = add i32 %a, %b
ret i32 0
})";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<IRInstructionData *> InstrList;
std::vector<unsigned> UnsignedVec;
SpecificBumpPtrAllocator<IRInstructionData> InstDataAllocator;
SpecificBumpPtrAllocator<IRInstructionDataList> IDLAllocator;
IRInstructionMapper Mapper(&InstDataAllocator, &IDLAllocator);
getVectors(*M, Mapper, InstrList, UnsignedVec);
// Check to make sure that we have a long enough region.
ASSERT_EQ(InstrList.size(), static_cast<unsigned>(6));
// Check that the instructions were added correctly to both vectors.
ASSERT_TRUE(InstrList.size() == UnsignedVec.size());
ASSERT_TRUE(longSimCandCompare(InstrList, true));
}
// Checks that two sets of identical instructions are found to be the same.
// Both sequences of adds have the same operand ordering, and the same
// instructions, making them strcturally equivalent.
TEST(IRSimilarityIdentifier, IdentitySimilarity) {
StringRef ModuleString = R"(
define i32 @f(i32 %a, i32 %b) {
bb0:
%0 = add i32 %a, %b
%1 = sub i32 %b, %a
br label %bb1
bb1:
%2 = add i32 %a, %b
%3 = sub i32 %b, %a
ret i32 0
})";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<std::vector<IRSimilarityCandidate>> SimilarityCandidates;
getSimilarities(*M, SimilarityCandidates);
ASSERT_TRUE(SimilarityCandidates.size() == 1);
for (std::vector<IRSimilarityCandidate> &Cands : SimilarityCandidates) {
ASSERT_TRUE(Cands.size() == 2);
unsigned InstIdx = 0;
for (IRSimilarityCandidate &Cand : Cands) {
ASSERT_TRUE(Cand.getStartIdx() == InstIdx);
InstIdx += 3;
}
}
}
// Checks that incorrect sequences are not found as similar. In this case,
// we have different sequences of instructions.
TEST(IRSimilarityIdentifier, InstructionDifference) {
StringRef ModuleString = R"(
define i32 @f(i32 %a, i32 %b, i32 %c, i32 %d) {
bb0:
%0 = sub i32 %a, %b
%1 = add i32 %b, %a
br label %bb1
bb1:
%2 = add i32 %c, %d
%3 = sub i32 %d, %c
ret i32 0
})";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<std::vector<IRSimilarityCandidate>> SimilarityCandidates;
getSimilarities(*M, SimilarityCandidates);
ASSERT_TRUE(SimilarityCandidates.empty());
}
// This test checks to see whether we can detect similarity for commutative
// instructions where the operands have been reversed.
TEST(IRSimilarityIdentifier, CommutativeSimilarity) {
StringRef ModuleString = R"(
define i32 @f(i32 %a, i32 %b) {
bb0:
%0 = add i32 %a, %b
%1 = add i32 %b, %a
br label %bb1
bb1:
%2 = add i32 %a, %b
%3 = add i32 %a, %b
ret i32 0
})";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<std::vector<IRSimilarityCandidate>> SimilarityCandidates;
getSimilarities(*M, SimilarityCandidates);
ASSERT_TRUE(SimilarityCandidates.size() == 1);
for (std::vector<IRSimilarityCandidate> &Cands : SimilarityCandidates) {
ASSERT_TRUE(Cands.size() == 2);
unsigned InstIdx = 0;
for (IRSimilarityCandidate &Cand : Cands) {
ASSERT_TRUE(Cand.getStartIdx() == InstIdx);
InstIdx += 3;
}
}
}
// This test checks to see whether we can detect different structure in
// commutative instructions. In this case, the second operand in the second
// add is different.
TEST(IRSimilarityIdentifier, NoCommutativeSimilarity) {
StringRef ModuleString = R"(
define i32 @f(i32 %a, i32 %b) {
bb0:
%0 = add i32 %a, %b
%1 = add i32 %1, %b
br label %bb1
bb1:
%2 = add i32 %a, %b
%3 = add i32 %2, %a
ret i32 0
})";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<std::vector<IRSimilarityCandidate>> SimilarityCandidates;
getSimilarities(*M, SimilarityCandidates);
ASSERT_TRUE(SimilarityCandidates.size() == 0);
}
// Check that we are not finding similarity in non commutative
// instructions. That is, while the instruction and operands used are the same
// in the two subtraction sequences, they are in a different order, and cannot
// be counted as the same since a subtraction is not commutative.
TEST(IRSimilarityIdentifier, NonCommutativeDifference) {
StringRef ModuleString = R"(
define i32 @f(i32 %a, i32 %b) {
bb0:
%0 = sub i32 %a, %b
%1 = sub i32 %b, %a
br label %bb1
bb1:
%2 = sub i32 %a, %b
%3 = sub i32 %a, %b
ret i32 0
})";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<std::vector<IRSimilarityCandidate>> SimilarityCandidates;
getSimilarities(*M, SimilarityCandidates);
ASSERT_TRUE(SimilarityCandidates.empty());
}
// Check that we find similarity despite changing the register names.
TEST(IRSimilarityIdentifier, MappingSimilarity) {
StringRef ModuleString = R"(
define i32 @f(i32 %a, i32 %b, i32 %c, i32 %d) {
bb0:
%0 = add i32 %a, %b
%1 = sub i32 %b, %a
br label %bb1
bb1:
%2 = add i32 %c, %d
%3 = sub i32 %d, %c
ret i32 0
})";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<std::vector<IRSimilarityCandidate>> SimilarityCandidates;
getSimilarities(*M, SimilarityCandidates);
ASSERT_TRUE(SimilarityCandidates.size() == 1);
for (std::vector<IRSimilarityCandidate> &Cands : SimilarityCandidates) {
ASSERT_TRUE(Cands.size() == 2);
unsigned InstIdx = 0;
for (IRSimilarityCandidate &Cand : Cands) {
ASSERT_TRUE(Cand.getStartIdx() == InstIdx);
InstIdx += 3;
}
}
}
// Check that we find instances of swapped predicate isomorphism. That is,
// for predicates that can be flipped, e.g. greater than to less than,
// we can identify that instances of these different literal predicates, but are
// the same within a single swap can be found.
TEST(IRSimilarityIdentifier, PredicateIsomorphism) {
StringRef ModuleString = R"(
define i32 @f(i32 %a, i32 %b) {
bb0:
%0 = add i32 %a, %b
%1 = icmp sgt i32 %b, %a
br label %bb1
bb1:
%2 = add i32 %a, %b
%3 = icmp slt i32 %a, %b
ret i32 0
})";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<std::vector<IRSimilarityCandidate>> SimilarityCandidates;
getSimilarities(*M, SimilarityCandidates);
ASSERT_TRUE(SimilarityCandidates.size() == 1);
for (std::vector<IRSimilarityCandidate> &Cands : SimilarityCandidates) {
ASSERT_TRUE(Cands.size() == 2);
unsigned InstIdx = 0;
for (IRSimilarityCandidate &Cand : Cands) {
ASSERT_TRUE(Cand.getStartIdx() == InstIdx);
InstIdx += 3;
}
}
}
// Checks that constants are detected as the same operand in each use in the
// sequences of instructions. Also checks that we can find structural
// equivalence using constants. In this case the 1 has the same use pattern as
// %a.
TEST(IRSimilarityIdentifier, ConstantMappingSimilarity) {
StringRef ModuleString = R"(
define i32 @f(i32 %a, i32 %b) {
bb0:
%0 = add i32 1, %b
%1 = icmp sgt i32 %b, 1
br label %bb1
bb1:
%2 = add i32 %a, %b
%3 = icmp sgt i32 %b, %a
ret i32 0
})";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<std::vector<IRSimilarityCandidate>> SimilarityCandidates;
getSimilarities(*M, SimilarityCandidates);
ASSERT_TRUE(SimilarityCandidates.size() == 1);
for (std::vector<IRSimilarityCandidate> &Cands : SimilarityCandidates) {
ASSERT_TRUE(Cands.size() == 2);
unsigned InstIdx = 0;
for (IRSimilarityCandidate &Cand : Cands) {
ASSERT_TRUE(Cand.getStartIdx() == InstIdx);
InstIdx += 3;
}
}
}
// Check that constants are uniquely identified. i.e. two different constants
// are not considered the same. This means that this should not find any
// structural similarity.
TEST(IRSimilarityIdentifier, ConstantMappingDifference) {
StringRef ModuleString = R"(
define i32 @f(i32 %a, i32 %b) {
bb0:
%0 = add i32 1, %b
%1 = icmp sgt i32 %b, 2
br label %bb1
bb1:
%2 = add i32 %a, %b
%3 = icmp slt i32 %a, %b
ret i32 0
})";
LLVMContext Context;
std::unique_ptr<Module> M = makeLLVMModule(Context, ModuleString);
std::vector<std::vector<IRSimilarityCandidate>> SimilarityCandidates;
getSimilarities(*M, SimilarityCandidates);
ASSERT_TRUE(SimilarityCandidates.empty());
}