1 //===- llvm/unittest/IR/AsmWriter.cpp - AsmWriter tests -------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 #include "llvm/IR/IRBuilder.h" 10 #include "llvm/IR/Function.h" 11 #include "llvm/IR/LLVMContext.h" 12 #include "llvm/IR/MDBuilder.h" 13 #include "llvm/IR/Module.h" 14 #include "gtest/gtest.h" 15 16 using namespace llvm; 17 18 namespace { 19 20 TEST(AsmWriterTest, DebugPrintDetachedInstruction) { 21 22 // PR24852: Ensure that an instruction can be printed even when it 23 // has metadata attached but no parent. 24 LLVMContext Ctx; 25 auto Ty = Type::getInt32Ty(Ctx); 26 auto Undef = UndefValue::get(Ty); 27 std::unique_ptr<BinaryOperator> Add(BinaryOperator::CreateAdd(Undef, Undef)); 28 Add->setMetadata( 29 "", MDNode::get(Ctx, {ConstantAsMetadata::get(ConstantInt::get(Ty, 1))})); 30 std::string S; 31 raw_string_ostream OS(S); 32 Add->print(OS); 33 std::size_t r = OS.str().find("<badref> = add i32 undef, undef, !<empty"); 34 EXPECT_TRUE(r != std::string::npos); 35 } 36 37 } 38
