1 //===- llvm/unittest/IR/AsmWriter.cpp - AsmWriter tests -------------------===//
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 #include "llvm/BinaryFormat/Dwarf.h"
9 #include "llvm/IR/DebugInfoMetadata.h"
10 #include "llvm/IR/Function.h"
11 #include "llvm/IR/IRBuilder.h"
12 #include "llvm/IR/LLVMContext.h"
13 #include "llvm/IR/MDBuilder.h"
14 #include "llvm/IR/Module.h"
15 #include "gtest/gtest.h"
16
17 using namespace llvm;
18
19 namespace {
20
TEST(AsmWriterTest,DebugPrintDetachedInstruction)21 TEST(AsmWriterTest, DebugPrintDetachedInstruction) {
22
23 // PR24852: Ensure that an instruction can be printed even when it
24 // has metadata attached but no parent.
25 LLVMContext Ctx;
26 auto Ty = Type::getInt32Ty(Ctx);
27 auto Undef = UndefValue::get(Ty);
28 std::unique_ptr<BinaryOperator> Add(BinaryOperator::CreateAdd(Undef, Undef));
29 Add->setMetadata(
30 "", MDNode::get(Ctx, {ConstantAsMetadata::get(ConstantInt::get(Ty, 1))}));
31 std::string S;
32 raw_string_ostream OS(S);
33 Add->print(OS);
34 std::size_t r = OS.str().find("<badref> = add i32 undef, undef, !<empty");
35 EXPECT_TRUE(r != std::string::npos);
36 }
37
TEST(AsmWriterTest,DebugPrintDetachedArgument)38 TEST(AsmWriterTest, DebugPrintDetachedArgument) {
39 LLVMContext Ctx;
40 auto Ty = Type::getInt32Ty(Ctx);
41 auto Arg = new Argument(Ty);
42
43 std::string S;
44 raw_string_ostream OS(S);
45 Arg->print(OS);
46 EXPECT_EQ(S, "i32 <badref>");
47 delete Arg;
48 }
49
TEST(AsmWriterTest,DumpDIExpression)50 TEST(AsmWriterTest, DumpDIExpression) {
51 LLVMContext Ctx;
52 uint64_t Ops[] = {
53 dwarf::DW_OP_constu, 4,
54 dwarf::DW_OP_minus,
55 dwarf::DW_OP_deref,
56 };
57 DIExpression *Expr = DIExpression::get(Ctx, Ops);
58 std::string S;
59 raw_string_ostream OS(S);
60 Expr->print(OS);
61 EXPECT_EQ("!DIExpression(DW_OP_constu, 4, DW_OP_minus, DW_OP_deref)",
62 OS.str());
63 }
64
65 }
66