Imported Upstream version 5.18.0.225

Former-commit-id: 10196d987d5fc5564b9d3b33b1fdf13190f4d0b5

external/llvm/unittests/IR/AsmWriterTest.cpp

@@ -0,0 +1,54 @@
+//===- llvm/unittest/IR/AsmWriter.cpp - AsmWriter tests -------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+#include "llvm/BinaryFormat/Dwarf.h"
+#include "llvm/IR/DebugInfoMetadata.h"
+#include "llvm/IR/Function.h"
+#include "llvm/IR/IRBuilder.h"
+#include "llvm/IR/LLVMContext.h"
+#include "llvm/IR/MDBuilder.h"
+#include "llvm/IR/Module.h"
+#include "gtest/gtest.h"
+
+using namespace llvm;
+
+namespace {
+
+TEST(AsmWriterTest, DebugPrintDetachedInstruction) {
+
+  // PR24852: Ensure that an instruction can be printed even when it
+  // has metadata attached but no parent.
+  LLVMContext Ctx;
+  auto Ty = Type::getInt32Ty(Ctx);
+  auto Undef = UndefValue::get(Ty);
+  std::unique_ptr<BinaryOperator> Add(BinaryOperator::CreateAdd(Undef, Undef));
+  Add->setMetadata(
+      "", MDNode::get(Ctx, {ConstantAsMetadata::get(ConstantInt::get(Ty, 1))}));
+  std::string S;
+  raw_string_ostream OS(S);
+  Add->print(OS);
+  std::size_t r = OS.str().find("<badref> = add i32 undef, undef, !<empty");
+  EXPECT_TRUE(r != std::string::npos);
+}
+
+TEST(AsmWriterTest, DumpDIExpression) {
+  LLVMContext Ctx;
+  uint64_t Ops[] = {
+    dwarf::DW_OP_constu, 4,
+    dwarf::DW_OP_minus,
+    dwarf::DW_OP_deref,
+  };
+  DIExpression *Expr = DIExpression::get(Ctx, Ops);
+  std::string S;
+  raw_string_ostream OS(S);
+  Expr->print(OS);
+  EXPECT_EQ("!DIExpression(DW_OP_constu, 4, DW_OP_minus, DW_OP_deref)",
+            OS.str());
+}
+
+}