xref: /llvm-project/llvm/unittests/tools/llvm-exegesis/AArch64/TargetTest.cpp (revision d422d3a755d25b44e66a37e487d99ca5065275a3)
1 //===-- TargetTest.cpp ------------------------------------------*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 #include "Target.h"
10 
11 #include <cassert>
12 #include <memory>
13 
14 #include "MCTargetDesc/AArch64MCTargetDesc.h"
15 #include "llvm/Support/TargetRegistry.h"
16 #include "llvm/Support/TargetSelect.h"
17 #include "gmock/gmock.h"
18 #include "gtest/gtest.h"
19 
20 namespace llvm {
21 namespace exegesis {
22 
23 void InitializeAArch64ExegesisTarget();
24 
25 namespace {
26 
27 using testing::Gt;
28 using testing::IsEmpty;
29 using testing::Not;
30 using testing::NotNull;
31 
32 constexpr const char kTriple[] = "aarch64-unknown-linux";
33 
34 class AArch64TargetTest : public ::testing::Test {
35 protected:
36   AArch64TargetTest()
37       : ExegesisTarget_(ExegesisTarget::lookup(Triple(kTriple))) {
38     EXPECT_THAT(ExegesisTarget_, NotNull());
39     std::string error;
40     Target_ = TargetRegistry::lookupTarget(kTriple, error);
41     EXPECT_THAT(Target_, NotNull());
42     STI_.reset(
43         Target_->createMCSubtargetInfo(kTriple, "generic", /*no features*/ ""));
44   }
45 
46   static void SetUpTestCase() {
47     LLVMInitializeAArch64TargetInfo();
48     LLVMInitializeAArch64Target();
49     LLVMInitializeAArch64TargetMC();
50     InitializeAArch64ExegesisTarget();
51   }
52 
53   std::vector<MCInst> setRegTo(unsigned Reg, const APInt &Value) {
54     return ExegesisTarget_->setRegTo(*STI_, Reg, Value);
55   }
56 
57   const Target *Target_;
58   const ExegesisTarget *const ExegesisTarget_;
59   std::unique_ptr<MCSubtargetInfo> STI_;
60 };
61 
62 TEST_F(AArch64TargetTest, SetRegToConstant) {
63   // The AArch64 target currently doesn't know how to set register values.
64   const auto Insts = setRegTo(AArch64::X0, APInt());
65   EXPECT_THAT(Insts, Not(IsEmpty()));
66 }
67 
68 TEST_F(AArch64TargetTest, DefaultPfmCounters) {
69   const std::string Expected = "CPU_CYCLES";
70   EXPECT_EQ(ExegesisTarget_->getPfmCounters("").CycleCounter, Expected);
71   EXPECT_EQ(ExegesisTarget_->getPfmCounters("unknown_cpu").CycleCounter,
72             Expected);
73 }
74 
75 } // namespace
76 } // namespace exegesis
77 } // namespace llvm
78