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//===- unittests/IR/ModuleTest.cpp - Module 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
//
//===----------------------------------------------------------------------===//
#include "llvm/IR/Module.h"
#include "llvm/IR/GlobalVariable.h"
#include "llvm/Support/RandomNumberGenerator.h"
#include "gtest/gtest.h"
#include <random>
using namespace llvm;
namespace {
bool sortByName(const GlobalVariable &L, const GlobalVariable &R) {
return L.getName() < R.getName();
}
bool sortByNameReverse(const GlobalVariable &L, const GlobalVariable &R) {
return sortByName(R, L);
}
TEST(ModuleTest, sortGlobalsByName) {
LLVMContext Context;
for (auto compare : {&sortByName, &sortByNameReverse}) {
Module M("M", Context);
Type *T = Type::getInt8Ty(Context);
GlobalValue::LinkageTypes L = GlobalValue::ExternalLinkage;
(void)new GlobalVariable(M, T, false, L, nullptr, "A");
(void)new GlobalVariable(M, T, false, L, nullptr, "F");
(void)new GlobalVariable(M, T, false, L, nullptr, "G");
(void)new GlobalVariable(M, T, false, L, nullptr, "E");
(void)new GlobalVariable(M, T, false, L, nullptr, "B");
(void)new GlobalVariable(M, T, false, L, nullptr, "H");
(void)new GlobalVariable(M, T, false, L, nullptr, "C");
(void)new GlobalVariable(M, T, false, L, nullptr, "D");
// Sort the globals by name.
EXPECT_FALSE(std::is_sorted(M.global_begin(), M.global_end(), compare));
M.getGlobalList().sort(compare);
EXPECT_TRUE(std::is_sorted(M.global_begin(), M.global_end(), compare));
}
}
TEST(ModuleTest, randomNumberGenerator) {
LLVMContext Context;
static char ID;
struct DummyPass : ModulePass {
DummyPass() : ModulePass(ID) {}
bool runOnModule(Module &) { return true; }
} DP;
Module M("R", Context);
std::uniform_int_distribution<int> dist;
const size_t NBCheck = 10;
std::array<int, NBCheck> RandomStreams[2];
for (auto &RandomStream : RandomStreams) {
std::unique_ptr<RandomNumberGenerator> RNG = M.createRNG(&DP);
std::generate(RandomStream.begin(), RandomStream.end(),
[&]() { return dist(*RNG); });
}
EXPECT_TRUE(std::equal(RandomStreams[0].begin(), RandomStreams[0].end(),
RandomStreams[1].begin()));
}
} // end namespace
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