--- a/unittests/CodeGen/DIEHashTest.cpp	Wed Feb 18 14:56:07 2015 +0900
+++ b/unittests/CodeGen/DIEHashTest.cpp	Tue Oct 13 17:48:58 2015 +0900
@@ -10,6 +10,7 @@
 #include "llvm/CodeGen/DIE.h"
 #include "../lib/CodeGen/AsmPrinter/DIEHash.h"
 #include "llvm/ADT/STLExtras.h"
+#include "llvm/CodeGen/DwarfStringPoolEntry.h"
 #include "llvm/Support/Debug.h"
 #include "llvm/Support/Dwarf.h"
 #include "llvm/Support/Format.h"
@@ -18,24 +19,41 @@
 using namespace llvm;
 
 namespace {
-TEST(DIEHashTest, Data1) {
+
+// Test fixture
+class DIEHashTest : public testing::Test {
+public:
+  BumpPtrAllocator Alloc;
+
+private:
+  StringMap<DwarfStringPoolEntry> Pool;
+
+public:
+  DIEString getString(StringRef S) {
+    DwarfStringPoolEntry Entry = {nullptr, 1, 1};
+    return DIEString(
+        DwarfStringPoolEntryRef(*Pool.insert(std::make_pair(S, Entry)).first));
+  }
+};
+
+TEST_F(DIEHashTest, Data1) {
   DIEHash Hash;
-  DIE Die(dwarf::DW_TAG_base_type);
+  DIE &Die = *DIE::get(Alloc, dwarf::DW_TAG_base_type);
   DIEInteger Size(4);
-  Die.addValue(dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, &Size);
+  Die.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, Size);
   uint64_t MD5Res = Hash.computeTypeSignature(Die);
   ASSERT_EQ(0x1AFE116E83701108ULL, MD5Res);
 }
 
 // struct {};
-TEST(DIEHashTest, TrivialType) {
-  DIE Unnamed(dwarf::DW_TAG_structure_type);
+TEST_F(DIEHashTest, TrivialType) {
+  DIE &Unnamed = *DIE::get(Alloc, dwarf::DW_TAG_structure_type);
   DIEInteger One(1);
-  Unnamed.addValue(dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, &One);
+  Unnamed.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, One);
 
   // Line and file number are ignored.
-  Unnamed.addValue(dwarf::DW_AT_decl_file, dwarf::DW_FORM_data1, &One);
-  Unnamed.addValue(dwarf::DW_AT_decl_line, dwarf::DW_FORM_data1, &One);
+  Unnamed.addValue(Alloc, dwarf::DW_AT_decl_file, dwarf::DW_FORM_data1, One);
+  Unnamed.addValue(Alloc, dwarf::DW_AT_decl_line, dwarf::DW_FORM_data1, One);
   uint64_t MD5Res = DIEHash().computeTypeSignature(Unnamed);
 
   // The exact same hash GCC produces for this DIE.
@@ -43,12 +61,12 @@
 }
 
 // struct foo { };
-TEST(DIEHashTest, NamedType) {
-  DIE Foo(dwarf::DW_TAG_structure_type);
+TEST_F(DIEHashTest, NamedType) {
+  DIE &Foo = *DIE::get(Alloc, dwarf::DW_TAG_structure_type);
   DIEInteger One(1);
-  DIEString FooStr(&One, "foo");
-  Foo.addValue(dwarf::DW_AT_name, dwarf::DW_FORM_strp, &FooStr);
-  Foo.addValue(dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, &One);
+  DIEString FooStr = getString("foo");
+  Foo.addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, FooStr);
+  Foo.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, One);
 
   uint64_t MD5Res = DIEHash().computeTypeSignature(Foo);
 
@@ -57,21 +75,22 @@
 }
 
 // namespace space { struct foo { }; }
-TEST(DIEHashTest, NamespacedType) {
-  DIE CU(dwarf::DW_TAG_compile_unit);
+TEST_F(DIEHashTest, NamespacedType) {
+  DIE &CU = *DIE::get(Alloc, dwarf::DW_TAG_compile_unit);
 
-  auto Space = make_unique<DIE>(dwarf::DW_TAG_namespace);
+  auto Space = DIE::get(Alloc, dwarf::DW_TAG_namespace);
   DIEInteger One(1);
-  DIEString SpaceStr(&One, "space");
-  Space->addValue(dwarf::DW_AT_name, dwarf::DW_FORM_strp, &SpaceStr);
+  DIEString SpaceStr = getString("space");
+  Space->addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, SpaceStr);
   // DW_AT_declaration is ignored.
-  Space->addValue(dwarf::DW_AT_declaration, dwarf::DW_FORM_flag_present, &One);
+  Space->addValue(Alloc, dwarf::DW_AT_declaration, dwarf::DW_FORM_flag_present,
+                  One);
   // sibling?
 
-  auto Foo = make_unique<DIE>(dwarf::DW_TAG_structure_type);
-  DIEString FooStr(&One, "foo");
-  Foo->addValue(dwarf::DW_AT_name, dwarf::DW_FORM_strp, &FooStr);
-  Foo->addValue(dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, &One);
+  auto Foo = DIE::get(Alloc, dwarf::DW_TAG_structure_type);
+  DIEString FooStr = getString("foo");
+  Foo->addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, FooStr);
+  Foo->addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, One);
 
   DIE &N = *Foo;
   Space->addChild(std::move(Foo));
@@ -84,27 +103,27 @@
 }
 
 // struct { int member; };
-TEST(DIEHashTest, TypeWithMember) {
-  DIE Unnamed(dwarf::DW_TAG_structure_type);
+TEST_F(DIEHashTest, TypeWithMember) {
+  DIE &Unnamed = *DIE::get(Alloc, dwarf::DW_TAG_structure_type);
   DIEInteger Four(4);
-  Unnamed.addValue(dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, &Four);
+  Unnamed.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, Four);
 
-  DIE Int(dwarf::DW_TAG_base_type);
-  DIEString IntStr(&Four, "int");
-  Int.addValue(dwarf::DW_AT_name, dwarf::DW_FORM_strp, &IntStr);
-  Int.addValue(dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, &Four);
+  DIE &Int = *DIE::get(Alloc, dwarf::DW_TAG_base_type);
+  DIEString IntStr = getString("int");
+  Int.addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, IntStr);
+  Int.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, Four);
   DIEInteger Five(5);
-  Int.addValue(dwarf::DW_AT_encoding, dwarf::DW_FORM_data1, &Five);
+  Int.addValue(Alloc, dwarf::DW_AT_encoding, dwarf::DW_FORM_data1, Five);
 
   DIEEntry IntRef(Int);
 
-  auto Member = make_unique<DIE>(dwarf::DW_TAG_member);
-  DIEString MemberStr(&Four, "member");
-  Member->addValue(dwarf::DW_AT_name, dwarf::DW_FORM_strp, &MemberStr);
+  auto Member = DIE::get(Alloc, dwarf::DW_TAG_member);
+  DIEString MemberStr = getString("member");
+  Member->addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, MemberStr);
   DIEInteger Zero(0);
-  Member->addValue(dwarf::DW_AT_data_member_location, dwarf::DW_FORM_data1,
-                   &Zero);
-  Member->addValue(dwarf::DW_AT_type, dwarf::DW_FORM_ref4, &IntRef);
+  Member->addValue(Alloc, dwarf::DW_AT_data_member_location,
+                   dwarf::DW_FORM_data1, Zero);
+  Member->addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4, IntRef);
 
   Unnamed.addChild(std::move(Member));
 
@@ -114,37 +133,37 @@
 }
 
 // struct foo { int mem1, mem2; };
-TEST(DIEHashTest, ReusedType) {
-  DIE Unnamed(dwarf::DW_TAG_structure_type);
+TEST_F(DIEHashTest, ReusedType) {
+  DIE &Unnamed = *DIE::get(Alloc, dwarf::DW_TAG_structure_type);
   DIEInteger Eight(8);
-  Unnamed.addValue(dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, &Eight);
+  Unnamed.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, Eight);
 
   DIEInteger Four(4);
-  DIE Int(dwarf::DW_TAG_base_type);
-  DIEString IntStr(&Four, "int");
-  Int.addValue(dwarf::DW_AT_name, dwarf::DW_FORM_strp, &IntStr);
-  Int.addValue(dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, &Four);
+  DIE &Int = *DIE::get(Alloc, dwarf::DW_TAG_base_type);
+  DIEString IntStr = getString("int");
+  Int.addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, IntStr);
+  Int.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, Four);
   DIEInteger Five(5);
-  Int.addValue(dwarf::DW_AT_encoding, dwarf::DW_FORM_data1, &Five);
+  Int.addValue(Alloc, dwarf::DW_AT_encoding, dwarf::DW_FORM_data1, Five);
 
   DIEEntry IntRef(Int);
 
-  auto Mem1 = make_unique<DIE>(dwarf::DW_TAG_member);
-  DIEString Mem1Str(&Four, "mem1");
-  Mem1->addValue(dwarf::DW_AT_name, dwarf::DW_FORM_strp, &Mem1Str);
+  auto Mem1 = DIE::get(Alloc, dwarf::DW_TAG_member);
+  DIEString Mem1Str = getString("mem1");
+  Mem1->addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, Mem1Str);
   DIEInteger Zero(0);
-  Mem1->addValue(dwarf::DW_AT_data_member_location, dwarf::DW_FORM_data1,
-                 &Zero);
-  Mem1->addValue(dwarf::DW_AT_type, dwarf::DW_FORM_ref4, &IntRef);
+  Mem1->addValue(Alloc, dwarf::DW_AT_data_member_location, dwarf::DW_FORM_data1,
+                 Zero);
+  Mem1->addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4, IntRef);
 
   Unnamed.addChild(std::move(Mem1));
 
-  auto Mem2 = make_unique<DIE>(dwarf::DW_TAG_member);
-  DIEString Mem2Str(&Four, "mem2");
-  Mem2->addValue(dwarf::DW_AT_name, dwarf::DW_FORM_strp, &Mem2Str);
-  Mem2->addValue(dwarf::DW_AT_data_member_location, dwarf::DW_FORM_data1,
-                 &Four);
-  Mem2->addValue(dwarf::DW_AT_type, dwarf::DW_FORM_ref4, &IntRef);
+  auto Mem2 = DIE::get(Alloc, dwarf::DW_TAG_member);
+  DIEString Mem2Str = getString("mem2");
+  Mem2->addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, Mem2Str);
+  Mem2->addValue(Alloc, dwarf::DW_AT_data_member_location, dwarf::DW_FORM_data1,
+                 Four);
+  Mem2->addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4, IntRef);
 
   Unnamed.addChild(std::move(Mem2));
 
@@ -154,18 +173,18 @@
 }
 
 // struct foo { static foo f; };
-TEST(DIEHashTest, RecursiveType) {
-  DIE Foo(dwarf::DW_TAG_structure_type);
+TEST_F(DIEHashTest, RecursiveType) {
+  DIE &Foo = *DIE::get(Alloc, dwarf::DW_TAG_structure_type);
   DIEInteger One(1);
-  Foo.addValue(dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, &One);
-  DIEString FooStr(&One, "foo");
-  Foo.addValue(dwarf::DW_AT_name, dwarf::DW_FORM_strp, &FooStr);
+  Foo.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, One);
+  DIEString FooStr = getString("foo");
+  Foo.addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, FooStr);
 
-  auto Mem = make_unique<DIE>(dwarf::DW_TAG_member);
-  DIEString MemStr(&One, "mem");
-  Mem->addValue(dwarf::DW_AT_name, dwarf::DW_FORM_strp, &MemStr);
+  auto Mem = DIE::get(Alloc, dwarf::DW_TAG_member);
+  DIEString MemStr = getString("mem");
+  Mem->addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, MemStr);
   DIEEntry FooRef(Foo);
-  Mem->addValue(dwarf::DW_AT_type, dwarf::DW_FORM_ref4, &FooRef);
+  Mem->addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4, FooRef);
   // DW_AT_external and DW_AT_declaration are ignored anyway, so skip them.
 
   Foo.addChild(std::move(Mem));
@@ -176,26 +195,27 @@
 }
 
 // struct foo { foo *mem; };
-TEST(DIEHashTest, Pointer) {
-  DIE Foo(dwarf::DW_TAG_structure_type);
+TEST_F(DIEHashTest, Pointer) {
+  DIE &Foo = *DIE::get(Alloc, dwarf::DW_TAG_structure_type);
   DIEInteger Eight(8);
-  Foo.addValue(dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, &Eight);
-  DIEString FooStr(&Eight, "foo");
-  Foo.addValue(dwarf::DW_AT_name, dwarf::DW_FORM_strp, &FooStr);
+  Foo.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, Eight);
+  DIEString FooStr = getString("foo");
+  Foo.addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, FooStr);
 
-  auto Mem = make_unique<DIE>(dwarf::DW_TAG_member);
-  DIEString MemStr(&Eight, "mem");
-  Mem->addValue(dwarf::DW_AT_name, dwarf::DW_FORM_strp, &MemStr);
+  auto Mem = DIE::get(Alloc, dwarf::DW_TAG_member);
+  DIEString MemStr = getString("mem");
+  Mem->addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, MemStr);
   DIEInteger Zero(0);
-  Mem->addValue(dwarf::DW_AT_data_member_location, dwarf::DW_FORM_data1, &Zero);
+  Mem->addValue(Alloc, dwarf::DW_AT_data_member_location, dwarf::DW_FORM_data1,
+                Zero);
 
-  DIE FooPtr(dwarf::DW_TAG_pointer_type);
-  FooPtr.addValue(dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, &Eight);
+  DIE &FooPtr = *DIE::get(Alloc, dwarf::DW_TAG_pointer_type);
+  FooPtr.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, Eight);
   DIEEntry FooRef(Foo);
-  FooPtr.addValue(dwarf::DW_AT_type, dwarf::DW_FORM_ref4, &FooRef);
+  FooPtr.addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4, FooRef);
 
   DIEEntry FooPtrRef(FooPtr);
-  Mem->addValue(dwarf::DW_AT_type, dwarf::DW_FORM_ref4, &FooPtrRef);
+  Mem->addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4, FooPtrRef);
 
   Foo.addChild(std::move(Mem));
 
@@ -205,30 +225,32 @@
 }
 
 // struct foo { foo &mem; };
-TEST(DIEHashTest, Reference) {
-  DIE Foo(dwarf::DW_TAG_structure_type);
+TEST_F(DIEHashTest, Reference) {
+  DIE &Foo = *DIE::get(Alloc, dwarf::DW_TAG_structure_type);
   DIEInteger Eight(8);
-  Foo.addValue(dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, &Eight);
-  DIEString FooStr(&Eight, "foo");
-  Foo.addValue(dwarf::DW_AT_name, dwarf::DW_FORM_strp, &FooStr);
+  Foo.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, Eight);
+  DIEString FooStr = getString("foo");
+  Foo.addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, FooStr);
 
-  auto Mem = make_unique<DIE>(dwarf::DW_TAG_member);
-  DIEString MemStr(&Eight, "mem");
-  Mem->addValue(dwarf::DW_AT_name, dwarf::DW_FORM_strp, &MemStr);
+  auto Mem = DIE::get(Alloc, dwarf::DW_TAG_member);
+  DIEString MemStr = getString("mem");
+  Mem->addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, MemStr);
   DIEInteger Zero(0);
-  Mem->addValue(dwarf::DW_AT_data_member_location, dwarf::DW_FORM_data1, &Zero);
+  Mem->addValue(Alloc, dwarf::DW_AT_data_member_location, dwarf::DW_FORM_data1,
+                Zero);
 
-  DIE FooRef(dwarf::DW_TAG_reference_type);
-  FooRef.addValue(dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, &Eight);
+  DIE &FooRef = *DIE::get(Alloc, dwarf::DW_TAG_reference_type);
+  FooRef.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, Eight);
   DIEEntry FooEntry(Foo);
-  FooRef.addValue(dwarf::DW_AT_type, dwarf::DW_FORM_ref4, &FooEntry);
+  FooRef.addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4, FooEntry);
 
-  DIE FooRefConst(dwarf::DW_TAG_const_type);
+  DIE &FooRefConst = *DIE::get(Alloc, dwarf::DW_TAG_const_type);
   DIEEntry FooRefRef(FooRef);
-  FooRefConst.addValue(dwarf::DW_AT_type, dwarf::DW_FORM_ref4, &FooRefRef);
+  FooRefConst.addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4,
+                       FooRefRef);
 
   DIEEntry FooRefConstRef(FooRefConst);
-  Mem->addValue(dwarf::DW_AT_type, dwarf::DW_FORM_ref4, &FooRefConstRef);
+  Mem->addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4, FooRefConstRef);
 
   Foo.addChild(std::move(Mem));
 
@@ -238,30 +260,32 @@
 }
 
 // struct foo { foo &&mem; };
-TEST(DIEHashTest, RValueReference) {
-  DIE Foo(dwarf::DW_TAG_structure_type);
+TEST_F(DIEHashTest, RValueReference) {
+  DIE &Foo = *DIE::get(Alloc, dwarf::DW_TAG_structure_type);
   DIEInteger Eight(8);
-  Foo.addValue(dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, &Eight);
-  DIEString FooStr(&Eight, "foo");
-  Foo.addValue(dwarf::DW_AT_name, dwarf::DW_FORM_strp, &FooStr);
+  Foo.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, Eight);
+  DIEString FooStr = getString("foo");
+  Foo.addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, FooStr);
 
-  auto Mem = make_unique<DIE>(dwarf::DW_TAG_member);
-  DIEString MemStr(&Eight, "mem");
-  Mem->addValue(dwarf::DW_AT_name, dwarf::DW_FORM_strp, &MemStr);
+  auto Mem = DIE::get(Alloc, dwarf::DW_TAG_member);
+  DIEString MemStr = getString("mem");
+  Mem->addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, MemStr);
   DIEInteger Zero(0);
-  Mem->addValue(dwarf::DW_AT_data_member_location, dwarf::DW_FORM_data1, &Zero);
+  Mem->addValue(Alloc, dwarf::DW_AT_data_member_location, dwarf::DW_FORM_data1,
+                Zero);
 
-  DIE FooRef(dwarf::DW_TAG_rvalue_reference_type);
-  FooRef.addValue(dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, &Eight);
+  DIE &FooRef = *DIE::get(Alloc, dwarf::DW_TAG_rvalue_reference_type);
+  FooRef.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, Eight);
   DIEEntry FooEntry(Foo);
-  FooRef.addValue(dwarf::DW_AT_type, dwarf::DW_FORM_ref4, &FooEntry);
+  FooRef.addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4, FooEntry);
 
-  DIE FooRefConst(dwarf::DW_TAG_const_type);
+  DIE &FooRefConst = *DIE::get(Alloc, dwarf::DW_TAG_const_type);
   DIEEntry FooRefRef(FooRef);
-  FooRefConst.addValue(dwarf::DW_AT_type, dwarf::DW_FORM_ref4, &FooRefRef);
+  FooRefConst.addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4,
+                       FooRefRef);
 
   DIEEntry FooRefConstRef(FooRefConst);
-  Mem->addValue(dwarf::DW_AT_type, dwarf::DW_FORM_ref4, &FooRefConstRef);
+  Mem->addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4, FooRefConstRef);
 
   Foo.addChild(std::move(Mem));
 
@@ -271,27 +295,28 @@
 }
 
 // struct foo { foo foo::*mem; };
-TEST(DIEHashTest, PtrToMember) {
-  DIE Foo(dwarf::DW_TAG_structure_type);
+TEST_F(DIEHashTest, PtrToMember) {
+  DIE &Foo = *DIE::get(Alloc, dwarf::DW_TAG_structure_type);
   DIEInteger Eight(8);
-  Foo.addValue(dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, &Eight);
-  DIEString FooStr(&Eight, "foo");
-  Foo.addValue(dwarf::DW_AT_name, dwarf::DW_FORM_strp, &FooStr);
+  Foo.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, Eight);
+  DIEString FooStr = getString("foo");
+  Foo.addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, FooStr);
 
-  auto Mem = make_unique<DIE>(dwarf::DW_TAG_member);
-  DIEString MemStr(&Eight, "mem");
-  Mem->addValue(dwarf::DW_AT_name, dwarf::DW_FORM_strp, &MemStr);
+  auto Mem = DIE::get(Alloc, dwarf::DW_TAG_member);
+  DIEString MemStr = getString("mem");
+  Mem->addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, MemStr);
   DIEInteger Zero(0);
-  Mem->addValue(dwarf::DW_AT_data_member_location, dwarf::DW_FORM_data1, &Zero);
+  Mem->addValue(Alloc, dwarf::DW_AT_data_member_location, dwarf::DW_FORM_data1,
+                Zero);
 
-  DIE PtrToFooMem(dwarf::DW_TAG_ptr_to_member_type);
+  DIE &PtrToFooMem = *DIE::get(Alloc, dwarf::DW_TAG_ptr_to_member_type);
   DIEEntry FooEntry(Foo);
-  PtrToFooMem.addValue(dwarf::DW_AT_type, dwarf::DW_FORM_ref4, &FooEntry);
-  PtrToFooMem.addValue(dwarf::DW_AT_containing_type, dwarf::DW_FORM_ref4,
-                       &FooEntry);
+  PtrToFooMem.addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4, FooEntry);
+  PtrToFooMem.addValue(Alloc, dwarf::DW_AT_containing_type, dwarf::DW_FORM_ref4,
+                       FooEntry);
 
   DIEEntry PtrToFooMemRef(PtrToFooMem);
-  Mem->addValue(dwarf::DW_AT_type, dwarf::DW_FORM_ref4, &PtrToFooMemRef);
+  Mem->addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4, PtrToFooMemRef);
 
   Foo.addChild(std::move(Mem));
 
@@ -305,37 +330,40 @@
 //
 //   struct bar; // { };
 //   struct foo { bar foo::*mem; };
-TEST(DIEHashTest, PtrToMemberDeclDefMatch) {
+TEST_F(DIEHashTest, PtrToMemberDeclDefMatch) {
   DIEInteger Zero(0);
   DIEInteger One(1);
   DIEInteger Eight(8);
-  DIEString FooStr(&Eight, "foo");
-  DIEString BarStr(&Eight, "bar");
-  DIEString MemStr(&Eight, "mem");
+  DIEString FooStr = getString("foo");
+  DIEString BarStr = getString("bar");
+  DIEString MemStr = getString("mem");
   uint64_t MD5ResDecl;
   {
-    DIE Bar(dwarf::DW_TAG_structure_type);
-    Bar.addValue(dwarf::DW_AT_name, dwarf::DW_FORM_strp, &BarStr);
-    Bar.addValue(dwarf::DW_AT_declaration, dwarf::DW_FORM_flag_present, &One);
+    DIE &Bar = *DIE::get(Alloc, dwarf::DW_TAG_structure_type);
+    Bar.addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, BarStr);
+    Bar.addValue(Alloc, dwarf::DW_AT_declaration, dwarf::DW_FORM_flag_present,
+                 One);
 
-    DIE Foo(dwarf::DW_TAG_structure_type);
-    Foo.addValue(dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, &Eight);
-    Foo.addValue(dwarf::DW_AT_name, dwarf::DW_FORM_strp, &FooStr);
+    DIE &Foo = *DIE::get(Alloc, dwarf::DW_TAG_structure_type);
+    Foo.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, Eight);
+    Foo.addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, FooStr);
 
-    auto Mem = make_unique<DIE>(dwarf::DW_TAG_member);
-    Mem->addValue(dwarf::DW_AT_name, dwarf::DW_FORM_strp, &MemStr);
-    Mem->addValue(dwarf::DW_AT_data_member_location, dwarf::DW_FORM_data1,
-                  &Zero);
+    auto Mem = DIE::get(Alloc, dwarf::DW_TAG_member);
+    Mem->addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, MemStr);
+    Mem->addValue(Alloc, dwarf::DW_AT_data_member_location,
+                  dwarf::DW_FORM_data1, Zero);
 
-    DIE PtrToFooMem(dwarf::DW_TAG_ptr_to_member_type);
+    DIE &PtrToFooMem = *DIE::get(Alloc, dwarf::DW_TAG_ptr_to_member_type);
     DIEEntry BarEntry(Bar);
-    PtrToFooMem.addValue(dwarf::DW_AT_type, dwarf::DW_FORM_ref4, &BarEntry);
+    PtrToFooMem.addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4,
+                         BarEntry);
     DIEEntry FooEntry(Foo);
-    PtrToFooMem.addValue(dwarf::DW_AT_containing_type, dwarf::DW_FORM_ref4,
-                         &FooEntry);
+    PtrToFooMem.addValue(Alloc, dwarf::DW_AT_containing_type,
+                         dwarf::DW_FORM_ref4, FooEntry);
 
     DIEEntry PtrToFooMemRef(PtrToFooMem);
-    Mem->addValue(dwarf::DW_AT_type, dwarf::DW_FORM_ref4, &PtrToFooMemRef);
+    Mem->addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4,
+                  PtrToFooMemRef);
 
     Foo.addChild(std::move(Mem));
 
@@ -343,28 +371,30 @@
   }
   uint64_t MD5ResDef;
   {
-    DIE Bar(dwarf::DW_TAG_structure_type);
-    Bar.addValue(dwarf::DW_AT_name, dwarf::DW_FORM_strp, &BarStr);
-    Bar.addValue(dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, &One);
+    DIE &Bar = *DIE::get(Alloc, dwarf::DW_TAG_structure_type);
+    Bar.addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, BarStr);
+    Bar.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, One);
 
-    DIE Foo(dwarf::DW_TAG_structure_type);
-    Foo.addValue(dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, &Eight);
-    Foo.addValue(dwarf::DW_AT_name, dwarf::DW_FORM_strp, &FooStr);
+    DIE &Foo = *DIE::get(Alloc, dwarf::DW_TAG_structure_type);
+    Foo.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, Eight);
+    Foo.addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, FooStr);
 
-    auto Mem = make_unique<DIE>(dwarf::DW_TAG_member);
-    Mem->addValue(dwarf::DW_AT_name, dwarf::DW_FORM_strp, &MemStr);
-    Mem->addValue(dwarf::DW_AT_data_member_location, dwarf::DW_FORM_data1,
-                  &Zero);
+    auto Mem = DIE::get(Alloc, dwarf::DW_TAG_member);
+    Mem->addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, MemStr);
+    Mem->addValue(Alloc, dwarf::DW_AT_data_member_location,
+                  dwarf::DW_FORM_data1, Zero);
 
-    DIE PtrToFooMem(dwarf::DW_TAG_ptr_to_member_type);
+    DIE &PtrToFooMem = *DIE::get(Alloc, dwarf::DW_TAG_ptr_to_member_type);
     DIEEntry BarEntry(Bar);
-    PtrToFooMem.addValue(dwarf::DW_AT_type, dwarf::DW_FORM_ref4, &BarEntry);
+    PtrToFooMem.addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4,
+                         BarEntry);
     DIEEntry FooEntry(Foo);
-    PtrToFooMem.addValue(dwarf::DW_AT_containing_type, dwarf::DW_FORM_ref4,
-                         &FooEntry);
+    PtrToFooMem.addValue(Alloc, dwarf::DW_AT_containing_type,
+                         dwarf::DW_FORM_ref4, FooEntry);
 
     DIEEntry PtrToFooMemRef(PtrToFooMem);
-    Mem->addValue(dwarf::DW_AT_type, dwarf::DW_FORM_ref4, &PtrToFooMemRef);
+    Mem->addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4,
+                  PtrToFooMemRef);
 
     Foo.addChild(std::move(Mem));
 
@@ -378,36 +408,39 @@
 //
 //   struct bar; // { };
 //   struct foo { bar bar::*mem; };
-TEST(DIEHashTest, PtrToMemberDeclDefMisMatch) {
+TEST_F(DIEHashTest, PtrToMemberDeclDefMisMatch) {
   DIEInteger Zero(0);
   DIEInteger One(1);
   DIEInteger Eight(8);
-  DIEString FooStr(&Eight, "foo");
-  DIEString BarStr(&Eight, "bar");
-  DIEString MemStr(&Eight, "mem");
+  DIEString FooStr = getString("foo");
+  DIEString BarStr = getString("bar");
+  DIEString MemStr = getString("mem");
   uint64_t MD5ResDecl;
   {
-    DIE Bar(dwarf::DW_TAG_structure_type);
-    Bar.addValue(dwarf::DW_AT_name, dwarf::DW_FORM_strp, &BarStr);
-    Bar.addValue(dwarf::DW_AT_declaration, dwarf::DW_FORM_flag_present, &One);
+    DIE &Bar = *DIE::get(Alloc, dwarf::DW_TAG_structure_type);
+    Bar.addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, BarStr);
+    Bar.addValue(Alloc, dwarf::DW_AT_declaration, dwarf::DW_FORM_flag_present,
+                 One);
 
-    DIE Foo(dwarf::DW_TAG_structure_type);
-    Foo.addValue(dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, &Eight);
-    Foo.addValue(dwarf::DW_AT_name, dwarf::DW_FORM_strp, &FooStr);
+    DIE &Foo = *DIE::get(Alloc, dwarf::DW_TAG_structure_type);
+    Foo.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, Eight);
+    Foo.addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, FooStr);
 
-    auto Mem = make_unique<DIE>(dwarf::DW_TAG_member);
-    Mem->addValue(dwarf::DW_AT_name, dwarf::DW_FORM_strp, &MemStr);
-    Mem->addValue(dwarf::DW_AT_data_member_location, dwarf::DW_FORM_data1,
-                  &Zero);
+    auto Mem = DIE::get(Alloc, dwarf::DW_TAG_member);
+    Mem->addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, MemStr);
+    Mem->addValue(Alloc, dwarf::DW_AT_data_member_location,
+                  dwarf::DW_FORM_data1, Zero);
 
-    DIE PtrToFooMem(dwarf::DW_TAG_ptr_to_member_type);
+    DIE &PtrToFooMem = *DIE::get(Alloc, dwarf::DW_TAG_ptr_to_member_type);
     DIEEntry BarEntry(Bar);
-    PtrToFooMem.addValue(dwarf::DW_AT_type, dwarf::DW_FORM_ref4, &BarEntry);
-    PtrToFooMem.addValue(dwarf::DW_AT_containing_type, dwarf::DW_FORM_ref4,
-                         &BarEntry);
+    PtrToFooMem.addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4,
+                         BarEntry);
+    PtrToFooMem.addValue(Alloc, dwarf::DW_AT_containing_type,
+                         dwarf::DW_FORM_ref4, BarEntry);
 
     DIEEntry PtrToFooMemRef(PtrToFooMem);
-    Mem->addValue(dwarf::DW_AT_type, dwarf::DW_FORM_ref4, &PtrToFooMemRef);
+    Mem->addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4,
+                  PtrToFooMemRef);
 
     Foo.addChild(std::move(Mem));
 
@@ -415,27 +448,29 @@
   }
   uint64_t MD5ResDef;
   {
-    DIE Bar(dwarf::DW_TAG_structure_type);
-    Bar.addValue(dwarf::DW_AT_name, dwarf::DW_FORM_strp, &BarStr);
-    Bar.addValue(dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, &One);
+    DIE &Bar = *DIE::get(Alloc, dwarf::DW_TAG_structure_type);
+    Bar.addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, BarStr);
+    Bar.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, One);
 
-    DIE Foo(dwarf::DW_TAG_structure_type);
-    Foo.addValue(dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, &Eight);
-    Foo.addValue(dwarf::DW_AT_name, dwarf::DW_FORM_strp, &FooStr);
+    DIE &Foo = *DIE::get(Alloc, dwarf::DW_TAG_structure_type);
+    Foo.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, Eight);
+    Foo.addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, FooStr);
 
-    auto Mem = make_unique<DIE>(dwarf::DW_TAG_member);
-    Mem->addValue(dwarf::DW_AT_name, dwarf::DW_FORM_strp, &MemStr);
-    Mem->addValue(dwarf::DW_AT_data_member_location, dwarf::DW_FORM_data1,
-                  &Zero);
+    auto Mem = DIE::get(Alloc, dwarf::DW_TAG_member);
+    Mem->addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, MemStr);
+    Mem->addValue(Alloc, dwarf::DW_AT_data_member_location,
+                  dwarf::DW_FORM_data1, Zero);
 
-    DIE PtrToFooMem(dwarf::DW_TAG_ptr_to_member_type);
+    DIE &PtrToFooMem = *DIE::get(Alloc, dwarf::DW_TAG_ptr_to_member_type);
     DIEEntry BarEntry(Bar);
-    PtrToFooMem.addValue(dwarf::DW_AT_type, dwarf::DW_FORM_ref4, &BarEntry);
-    PtrToFooMem.addValue(dwarf::DW_AT_containing_type, dwarf::DW_FORM_ref4,
-                         &BarEntry);
+    PtrToFooMem.addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4,
+                         BarEntry);
+    PtrToFooMem.addValue(Alloc, dwarf::DW_AT_containing_type,
+                         dwarf::DW_FORM_ref4, BarEntry);
 
     DIEEntry PtrToFooMemRef(PtrToFooMem);
-    Mem->addValue(dwarf::DW_AT_type, dwarf::DW_FORM_ref4, &PtrToFooMemRef);
+    Mem->addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4,
+                  PtrToFooMemRef);
 
     Foo.addChild(std::move(Mem));
 
@@ -451,31 +486,34 @@
 
 // struct { } a;
 // struct foo { decltype(a) mem; };
-TEST(DIEHashTest, RefUnnamedType) {
+TEST_F(DIEHashTest, RefUnnamedType) {
   DIEInteger Zero(0);
   DIEInteger One(1);
   DIEInteger Eight(8);
-  DIEString FooStr(&Zero, "foo");
-  DIEString MemStr(&Zero, "mem");
+  DIEString FooStr = getString("foo");
+  DIEString MemStr = getString("mem");
 
-  DIE Unnamed(dwarf::DW_TAG_structure_type);
-  Unnamed.addValue(dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, &One);
+  DIE &Unnamed = *DIE::get(Alloc, dwarf::DW_TAG_structure_type);
+  Unnamed.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, One);
+
+  DIE &Foo = *DIE::get(Alloc, dwarf::DW_TAG_structure_type);
+  Foo.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, Eight);
+  Foo.addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, FooStr);
 
-  DIE Foo(dwarf::DW_TAG_structure_type);
-  Foo.addValue(dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, &Eight);
-  Foo.addValue(dwarf::DW_AT_name, dwarf::DW_FORM_strp, &FooStr);
+  auto Mem = DIE::get(Alloc, dwarf::DW_TAG_member);
+  Mem->addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, MemStr);
+  Mem->addValue(Alloc, dwarf::DW_AT_data_member_location, dwarf::DW_FORM_data1,
+                Zero);
 
-  auto Mem = make_unique<DIE>(dwarf::DW_TAG_member);
-  Mem->addValue(dwarf::DW_AT_name, dwarf::DW_FORM_strp, &MemStr);
-  Mem->addValue(dwarf::DW_AT_data_member_location, dwarf::DW_FORM_data1, &Zero);
-
-  DIE UnnamedPtr(dwarf::DW_TAG_pointer_type);
-  UnnamedPtr.addValue(dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, &Eight);
+  DIE &UnnamedPtr = *DIE::get(Alloc, dwarf::DW_TAG_pointer_type);
+  UnnamedPtr.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1,
+                      Eight);
   DIEEntry UnnamedRef(Unnamed);
-  UnnamedPtr.addValue(dwarf::DW_AT_type, dwarf::DW_FORM_ref4, &UnnamedRef);
+  UnnamedPtr.addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4,
+                      UnnamedRef);
 
   DIEEntry UnnamedPtrRef(UnnamedPtr);
-  Mem->addValue(dwarf::DW_AT_type, dwarf::DW_FORM_ref4, &UnnamedPtrRef);
+  Mem->addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4, UnnamedPtrRef);
 
   Foo.addChild(std::move(Mem));
 
@@ -485,15 +523,15 @@
 }
 
 // struct { struct foo { }; };
-TEST(DIEHashTest, NestedType) {
-  DIE Unnamed(dwarf::DW_TAG_structure_type);
+TEST_F(DIEHashTest, NestedType) {
+  DIE &Unnamed = *DIE::get(Alloc, dwarf::DW_TAG_structure_type);
   DIEInteger One(1);
-  Unnamed.addValue(dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, &One);
+  Unnamed.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, One);
 
-  auto Foo = make_unique<DIE>(dwarf::DW_TAG_structure_type);
-  DIEString FooStr(&One, "foo");
-  Foo->addValue(dwarf::DW_AT_name, dwarf::DW_FORM_strp, &FooStr);
-  Foo->addValue(dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, &One);
+  auto Foo = DIE::get(Alloc, dwarf::DW_TAG_structure_type);
+  DIEString FooStr = getString("foo");
+  Foo->addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, FooStr);
+  Foo->addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, One);
 
   Unnamed.addChild(std::move(Foo));
 
@@ -504,14 +542,14 @@
 }
 
 // struct { static void func(); };
-TEST(DIEHashTest, MemberFunc) {
-  DIE Unnamed(dwarf::DW_TAG_structure_type);
+TEST_F(DIEHashTest, MemberFunc) {
+  DIE &Unnamed = *DIE::get(Alloc, dwarf::DW_TAG_structure_type);
   DIEInteger One(1);
-  Unnamed.addValue(dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, &One);
+  Unnamed.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, One);
 
-  auto Func = make_unique<DIE>(dwarf::DW_TAG_subprogram);
-  DIEString FuncStr(&One, "func");
-  Func->addValue(dwarf::DW_AT_name, dwarf::DW_FORM_strp, &FuncStr);
+  auto Func = DIE::get(Alloc, dwarf::DW_TAG_subprogram);
+  DIEString FuncStr = getString("func");
+  Func->addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, FuncStr);
 
   Unnamed.addChild(std::move(Func));
 
@@ -524,25 +562,28 @@
 // struct A {
 //   static void func();
 // };
-TEST(DIEHashTest, MemberFuncFlag) {
-  DIE A(dwarf::DW_TAG_structure_type);
+TEST_F(DIEHashTest, MemberFuncFlag) {
+  DIE &A = *DIE::get(Alloc, dwarf::DW_TAG_structure_type);
   DIEInteger One(1);
-  DIEString AStr(&One, "A");
-  A.addValue(dwarf::DW_AT_name, dwarf::DW_FORM_strp, &AStr);
-  A.addValue(dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, &One);
-  A.addValue(dwarf::DW_AT_decl_file, dwarf::DW_FORM_data1, &One);
-  A.addValue(dwarf::DW_AT_decl_line, dwarf::DW_FORM_data1, &One);
+  DIEString AStr = getString("A");
+  A.addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, AStr);
+  A.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, One);
+  A.addValue(Alloc, dwarf::DW_AT_decl_file, dwarf::DW_FORM_data1, One);
+  A.addValue(Alloc, dwarf::DW_AT_decl_line, dwarf::DW_FORM_data1, One);
 
-  auto Func = make_unique<DIE>(dwarf::DW_TAG_subprogram);
-  DIEString FuncStr(&One, "func");
-  DIEString FuncLinkage(&One, "_ZN1A4funcEv");
+  auto Func = DIE::get(Alloc, dwarf::DW_TAG_subprogram);
+  DIEString FuncStr = getString("func");
+  DIEString FuncLinkage = getString("_ZN1A4funcEv");
   DIEInteger Two(2);
-  Func->addValue(dwarf::DW_AT_external, dwarf::DW_FORM_flag_present, &One);
-  Func->addValue(dwarf::DW_AT_name, dwarf::DW_FORM_strp, &FuncStr);
-  Func->addValue(dwarf::DW_AT_decl_file, dwarf::DW_FORM_data1, &One);
-  Func->addValue(dwarf::DW_AT_decl_line, dwarf::DW_FORM_data1, &Two);
-  Func->addValue(dwarf::DW_AT_linkage_name, dwarf::DW_FORM_strp, &FuncLinkage);
-  Func->addValue(dwarf::DW_AT_declaration, dwarf::DW_FORM_flag_present, &One);
+  Func->addValue(Alloc, dwarf::DW_AT_external, dwarf::DW_FORM_flag_present,
+                 One);
+  Func->addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, FuncStr);
+  Func->addValue(Alloc, dwarf::DW_AT_decl_file, dwarf::DW_FORM_data1, One);
+  Func->addValue(Alloc, dwarf::DW_AT_decl_line, dwarf::DW_FORM_data1, Two);
+  Func->addValue(Alloc, dwarf::DW_AT_linkage_name, dwarf::DW_FORM_strp,
+                 FuncLinkage);
+  Func->addValue(Alloc, dwarf::DW_AT_declaration, dwarf::DW_FORM_flag_present,
+                 One);
 
   A.addChild(std::move(Func));
 
@@ -557,39 +598,40 @@
 //   const static int PI = -3;
 // };
 // A a;
-TEST(DIEHashTest, MemberSdata) {
-  DIE A(dwarf::DW_TAG_structure_type);
+TEST_F(DIEHashTest, MemberSdata) {
+  DIE &A = *DIE::get(Alloc, dwarf::DW_TAG_structure_type);
   DIEInteger One(1);
-  DIEString AStr(&One, "A");
-  A.addValue(dwarf::DW_AT_name, dwarf::DW_FORM_strp, &AStr);
-  A.addValue(dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, &One);
-  A.addValue(dwarf::DW_AT_decl_file, dwarf::DW_FORM_data1, &One);
-  A.addValue(dwarf::DW_AT_decl_line, dwarf::DW_FORM_data1, &One);
+  DIEString AStr = getString("A");
+  A.addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, AStr);
+  A.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, One);
+  A.addValue(Alloc, dwarf::DW_AT_decl_file, dwarf::DW_FORM_data1, One);
+  A.addValue(Alloc, dwarf::DW_AT_decl_line, dwarf::DW_FORM_data1, One);
 
   DIEInteger Four(4);
   DIEInteger Five(5);
-  DIEString FStr(&One, "int");
-  DIE IntTyDIE(dwarf::DW_TAG_base_type);
-  IntTyDIE.addValue(dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, &Four);
-  IntTyDIE.addValue(dwarf::DW_AT_encoding, dwarf::DW_FORM_data1, &Five);
-  IntTyDIE.addValue(dwarf::DW_AT_name, dwarf::DW_FORM_strp, &FStr);
+  DIEString FStr = getString("int");
+  DIE &IntTyDIE = *DIE::get(Alloc, dwarf::DW_TAG_base_type);
+  IntTyDIE.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, Four);
+  IntTyDIE.addValue(Alloc, dwarf::DW_AT_encoding, dwarf::DW_FORM_data1, Five);
+  IntTyDIE.addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, FStr);
 
   DIEEntry IntTy(IntTyDIE);
-  auto PITyDIE = make_unique<DIE>(dwarf::DW_TAG_const_type);
-  PITyDIE->addValue(dwarf::DW_AT_type, dwarf::DW_FORM_ref4, &IntTy);
+  auto PITyDIE = DIE::get(Alloc, dwarf::DW_TAG_const_type);
+  PITyDIE->addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4, IntTy);
 
   DIEEntry PITy(*PITyDIE);
-  auto PI = make_unique<DIE>(dwarf::DW_TAG_member);
-  DIEString PIStr(&One, "PI");
+  auto PI = DIE::get(Alloc, dwarf::DW_TAG_member);
+  DIEString PIStr = getString("PI");
   DIEInteger Two(2);
   DIEInteger NegThree(-3);
-  PI->addValue(dwarf::DW_AT_name, dwarf::DW_FORM_strp, &PIStr);
-  PI->addValue(dwarf::DW_AT_decl_file, dwarf::DW_FORM_data1, &One);
-  PI->addValue(dwarf::DW_AT_decl_line, dwarf::DW_FORM_data1, &Two);
-  PI->addValue(dwarf::DW_AT_type, dwarf::DW_FORM_ref4, &PITy);
-  PI->addValue(dwarf::DW_AT_external, dwarf::DW_FORM_flag_present, &One);
-  PI->addValue(dwarf::DW_AT_declaration, dwarf::DW_FORM_flag_present, &One);
-  PI->addValue(dwarf::DW_AT_const_value, dwarf::DW_FORM_sdata, &NegThree);
+  PI->addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, PIStr);
+  PI->addValue(Alloc, dwarf::DW_AT_decl_file, dwarf::DW_FORM_data1, One);
+  PI->addValue(Alloc, dwarf::DW_AT_decl_line, dwarf::DW_FORM_data1, Two);
+  PI->addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4, PITy);
+  PI->addValue(Alloc, dwarf::DW_AT_external, dwarf::DW_FORM_flag_present, One);
+  PI->addValue(Alloc, dwarf::DW_AT_declaration, dwarf::DW_FORM_flag_present,
+               One);
+  PI->addValue(Alloc, dwarf::DW_AT_const_value, dwarf::DW_FORM_sdata, NegThree);
 
   A.addChild(std::move(PI));
 
@@ -602,36 +644,38 @@
 //   const static float PI = 3.14;
 // };
 // A a;
-TEST(DIEHashTest, MemberBlock) {
-  DIE A(dwarf::DW_TAG_structure_type);
+TEST_F(DIEHashTest, MemberBlock) {
+  DIE &A = *DIE::get(Alloc, dwarf::DW_TAG_structure_type);
   DIEInteger One(1);
-  DIEString AStr(&One, "A");
-  A.addValue(dwarf::DW_AT_name, dwarf::DW_FORM_strp, &AStr);
-  A.addValue(dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, &One);
-  A.addValue(dwarf::DW_AT_decl_file, dwarf::DW_FORM_data1, &One);
-  A.addValue(dwarf::DW_AT_decl_line, dwarf::DW_FORM_data1, &One);
+  DIEString AStr = getString("A");
+  A.addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, AStr);
+  A.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, One);
+  A.addValue(Alloc, dwarf::DW_AT_decl_file, dwarf::DW_FORM_data1, One);
+  A.addValue(Alloc, dwarf::DW_AT_decl_line, dwarf::DW_FORM_data1, One);
 
   DIEInteger Four(4);
-  DIEString FStr(&One, "float");
-  auto FloatTyDIE = make_unique<DIE>(dwarf::DW_TAG_base_type);
-  FloatTyDIE->addValue(dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, &Four);
-  FloatTyDIE->addValue(dwarf::DW_AT_encoding, dwarf::DW_FORM_data1, &Four);
-  FloatTyDIE->addValue(dwarf::DW_AT_name, dwarf::DW_FORM_strp, &FStr);
-
+  DIEString FStr = getString("float");
+  auto FloatTyDIE = DIE::get(Alloc, dwarf::DW_TAG_base_type);
+  FloatTyDIE->addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1,
+                       Four);
+  FloatTyDIE->addValue(Alloc, dwarf::DW_AT_encoding, dwarf::DW_FORM_data1,
+                       Four);
+  FloatTyDIE->addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, FStr);
   DIEEntry FloatTy(*FloatTyDIE);
-  auto PITyDIE = make_unique<DIE>(dwarf::DW_TAG_const_type);
-  PITyDIE->addValue(dwarf::DW_AT_type, dwarf::DW_FORM_ref4, &FloatTy);
+  auto PITyDIE = DIE::get(Alloc, dwarf::DW_TAG_const_type);
+  PITyDIE->addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4, FloatTy);
 
   DIEEntry PITy(*PITyDIE);
-  auto PI = make_unique<DIE>(dwarf::DW_TAG_member);
-  DIEString PIStr(&One, "PI");
+  auto PI = DIE::get(Alloc, dwarf::DW_TAG_member);
+  DIEString PIStr = getString("PI");
   DIEInteger Two(2);
-  PI->addValue(dwarf::DW_AT_name, dwarf::DW_FORM_strp, &PIStr);
-  PI->addValue(dwarf::DW_AT_decl_file, dwarf::DW_FORM_data1, &One);
-  PI->addValue(dwarf::DW_AT_decl_line, dwarf::DW_FORM_data1, &Two);
-  PI->addValue(dwarf::DW_AT_type, dwarf::DW_FORM_ref4, &PITy);
-  PI->addValue(dwarf::DW_AT_external, dwarf::DW_FORM_flag_present, &One);
-  PI->addValue(dwarf::DW_AT_declaration, dwarf::DW_FORM_flag_present, &One);
+  PI->addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, PIStr);
+  PI->addValue(Alloc, dwarf::DW_AT_decl_file, dwarf::DW_FORM_data1, One);
+  PI->addValue(Alloc, dwarf::DW_AT_decl_line, dwarf::DW_FORM_data1, Two);
+  PI->addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4, PITy);
+  PI->addValue(Alloc, dwarf::DW_AT_external, dwarf::DW_FORM_flag_present, One);
+  PI->addValue(Alloc, dwarf::DW_AT_declaration, dwarf::DW_FORM_flag_present,
+               One);
 
   DIEBlock PIBlock;
   DIEInteger Blk1(0xc3);
@@ -639,12 +683,13 @@
   DIEInteger Blk3(0x48);
   DIEInteger Blk4(0x40);
 
-  PIBlock.addValue((dwarf::Attribute)0, dwarf::DW_FORM_data1, &Blk1);
-  PIBlock.addValue((dwarf::Attribute)0, dwarf::DW_FORM_data1, &Blk2);
-  PIBlock.addValue((dwarf::Attribute)0, dwarf::DW_FORM_data1, &Blk3);
-  PIBlock.addValue((dwarf::Attribute)0, dwarf::DW_FORM_data1, &Blk4);
+  PIBlock.addValue(Alloc, (dwarf::Attribute)0, dwarf::DW_FORM_data1, Blk1);
+  PIBlock.addValue(Alloc, (dwarf::Attribute)0, dwarf::DW_FORM_data1, Blk2);
+  PIBlock.addValue(Alloc, (dwarf::Attribute)0, dwarf::DW_FORM_data1, Blk3);
+  PIBlock.addValue(Alloc, (dwarf::Attribute)0, dwarf::DW_FORM_data1, Blk4);
 
-  PI->addValue(dwarf::DW_AT_const_value, dwarf::DW_FORM_block1, &PIBlock);
+  PI->addValue(Alloc, dwarf::DW_AT_const_value, dwarf::DW_FORM_block1,
+               &PIBlock);
 
   A.addChild(std::move(PI));