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 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 38 TEST(AsmWriterTest, DumpDIExpression) { 39 LLVMContext Ctx; 40 uint64_t Ops[] = { 41 dwarf::DW_OP_constu, 4, 42 dwarf::DW_OP_minus, 43 dwarf::DW_OP_deref, 44 }; 45 DIExpression *Expr = DIExpression::get(Ctx, Ops); 46 std::string S; 47 raw_string_ostream OS(S); 48 Expr->print(OS); 49 EXPECT_EQ("!DIExpression(DW_OP_constu, 4, DW_OP_minus, DW_OP_deref)", 50 OS.str()); 51 } 52 53 } 54