UseTest.cpp
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//===- llvm/unittest/IR/UseTest.cpp - Use 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/AsmParser/Parser.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/IR/Module.h"
#include "llvm/IR/User.h"
#include "llvm/Support/Format.h"
#include "llvm/Support/SourceMgr.h"
#include "gtest/gtest.h"
using namespace llvm;
namespace {
TEST(UseTest, sort) {
LLVMContext C;
const char *ModuleString = "define void @f(i32 %x) {\n"
"entry:\n"
" %v0 = add i32 %x, 0\n"
" %v2 = add i32 %x, 2\n"
" %v5 = add i32 %x, 5\n"
" %v1 = add i32 %x, 1\n"
" %v3 = add i32 %x, 3\n"
" %v7 = add i32 %x, 7\n"
" %v6 = add i32 %x, 6\n"
" %v4 = add i32 %x, 4\n"
" ret void\n"
"}\n";
SMDiagnostic Err;
char vnbuf[8];
std::unique_ptr<Module> M = parseAssemblyString(ModuleString, Err, C);
Function *F = M->getFunction("f");
ASSERT_TRUE(F);
ASSERT_TRUE(F->arg_begin() != F->arg_end());
Argument &X = *F->arg_begin();
ASSERT_EQ("x", X.getName());
X.sortUseList([](const Use &L, const Use &R) {
return L.getUser()->getName() < R.getUser()->getName();
});
unsigned I = 0;
for (User *U : X.users()) {
format("v%u", I++).snprint(vnbuf, sizeof(vnbuf));
EXPECT_EQ(vnbuf, U->getName());
}
ASSERT_EQ(8u, I);
X.sortUseList([](const Use &L, const Use &R) {
return L.getUser()->getName() > R.getUser()->getName();
});
I = 0;
for (User *U : X.users()) {
format("v%u", (7 - I++)).snprint(vnbuf, sizeof(vnbuf));
EXPECT_EQ(vnbuf, U->getName());
}
ASSERT_EQ(8u, I);
}
TEST(UseTest, reverse) {
LLVMContext C;
const char *ModuleString = "define void @f(i32 %x) {\n"
"entry:\n"
" %v0 = add i32 %x, 0\n"
" %v2 = add i32 %x, 2\n"
" %v5 = add i32 %x, 5\n"
" %v1 = add i32 %x, 1\n"
" %v3 = add i32 %x, 3\n"
" %v7 = add i32 %x, 7\n"
" %v6 = add i32 %x, 6\n"
" %v4 = add i32 %x, 4\n"
" ret void\n"
"}\n";
SMDiagnostic Err;
char vnbuf[8];
std::unique_ptr<Module> M = parseAssemblyString(ModuleString, Err, C);
Function *F = M->getFunction("f");
ASSERT_TRUE(F);
ASSERT_TRUE(F->arg_begin() != F->arg_end());
Argument &X = *F->arg_begin();
ASSERT_EQ("x", X.getName());
X.sortUseList([](const Use &L, const Use &R) {
return L.getUser()->getName() < R.getUser()->getName();
});
unsigned I = 0;
for (User *U : X.users()) {
format("v%u", I++).snprint(vnbuf, sizeof(vnbuf));
EXPECT_EQ(vnbuf, U->getName());
}
ASSERT_EQ(8u, I);
X.reverseUseList();
I = 0;
for (User *U : X.users()) {
format("v%u", (7 - I++)).snprint(vnbuf, sizeof(vnbuf));
EXPECT_EQ(vnbuf, U->getName());
}
ASSERT_EQ(8u, I);
}
} // end anonymous namespace