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c074efe1c7
Fix PR24852 (crash with -debug -instcombine) Patch by Than McIntosh <thanm@google.com> Summary: Add guards to the asm writer to prevent crashing when dumping an instruction that has no basic block. Differential Revision: http://reviews.llvm.org/D15798 From: Than McIntosh <thanm@google.com> llvm-svn: 257094
38 lines
1.1 KiB
C++
38 lines
1.1 KiB
C++
//===- llvm/unittest/IR/AsmWriter.cpp - AsmWriter tests -------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/IR/IRBuilder.h"
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#include "llvm/IR/Function.h"
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#include "llvm/IR/LLVMContext.h"
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#include "llvm/IR/MDBuilder.h"
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#include "llvm/IR/Module.h"
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#include "gtest/gtest.h"
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using namespace llvm;
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namespace {
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TEST(AsmWriterTest, DebugPrintDetachedInstruction) {
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// PR24852: Ensure that an instruction can be printed even when it
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// has metadata attached but no parent.
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LLVMContext Ctx;
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auto Ty = Type::getInt32Ty(Ctx);
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auto Undef = UndefValue::get(Ty);
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std::unique_ptr<BinaryOperator> Add(BinaryOperator::CreateAdd(Undef, Undef));
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Add->setMetadata(
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"", MDNode::get(Ctx, {ConstantAsMetadata::get(ConstantInt::get(Ty, 1))}));
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std::string S;
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raw_string_ostream OS(S);
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Add->print(OS);
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std::size_t r = OS.str().find("<badref> = add i32 undef, undef, !<empty");
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EXPECT_TRUE(r != std::string::npos);
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}
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}
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