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AsmPrinter: Make DIEString small

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Expose the `DwarfStringPool` entry in a header, and store a pointer to
it directly in `DIEString`.  Instead of choosing at creation time how to
emit it, use the `dwarf::Form` to determine that at emission time.
Besides avoiding the other `DIEValue`, this shaves two pointers off of
`DIEString`; the data is now a single pointer.  This is a nice cleanup
on its own -- and drops memory usage from 861 MB down to 853 MB, around
0.9% -- but it's also preparation for passing `DIEValue`s by value.

(I'm looking at `llc` memory usage on `verify-uselistorder.lto.opt.bc`;
see r236629 for details.)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@238117 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Duncan P. N. Exon Smith
2015-05-24 16:40:47 +00:00
parent 1717728066
commit 24ad5c9e05
4 changed files with 112 additions and 90 deletions
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126
unittests/CodeGen/DIEHashTest.cpp
View File

@@ -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"
@@ -18,7 +19,20 @@
using namespace llvm;
namespace {
TEST(DIEHashTest, Data1) {
// Test fixture
class DIEHashTest : public testing::Test {
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);
DIEInteger Size(4);
@@ -28,7 +42,7 @@ TEST(DIEHashTest, Data1) {
}
// struct {};
TEST(DIEHashTest, TrivialType) {
TEST_F(DIEHashTest, TrivialType) {
DIE Unnamed(dwarf::DW_TAG_structure_type);
DIEInteger One(1);
Unnamed.addValue(dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, &One);
@@ -43,10 +57,10 @@ TEST(DIEHashTest, TrivialType) {
}
// struct foo { };
TEST(DIEHashTest, NamedType) {
TEST_F(DIEHashTest, NamedType) {
DIE Foo(dwarf::DW_TAG_structure_type);
DIEInteger One(1);
DIEString FooStr(&One, "foo");
DIEString FooStr = getString("foo");
Foo.addValue(dwarf::DW_AT_name, dwarf::DW_FORM_strp, &FooStr);
Foo.addValue(dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, &One);
@@ -57,19 +71,19 @@ TEST(DIEHashTest, NamedType) {
}
// namespace space { struct foo { }; }
TEST(DIEHashTest, NamespacedType) {
TEST_F(DIEHashTest, NamespacedType) {
DIE CU(dwarf::DW_TAG_compile_unit);
auto Space = make_unique<DIE>(dwarf::DW_TAG_namespace);
DIEInteger One(1);
DIEString SpaceStr(&One, "space");
DIEString SpaceStr = getString("space");
Space->addValue(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);
// sibling?
auto Foo = make_unique<DIE>(dwarf::DW_TAG_structure_type);
DIEString FooStr(&One, "foo");
DIEString FooStr = getString("foo");
Foo->addValue(dwarf::DW_AT_name, dwarf::DW_FORM_strp, &FooStr);
Foo->addValue(dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, &One);
@@ -84,13 +98,13 @@ TEST(DIEHashTest, NamespacedType) {
}
// struct { int member; };
TEST(DIEHashTest, TypeWithMember) {
TEST_F(DIEHashTest, TypeWithMember) {
DIE Unnamed(dwarf::DW_TAG_structure_type);
DIEInteger Four(4);
Unnamed.addValue(dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, &Four);
DIE Int(dwarf::DW_TAG_base_type);
DIEString IntStr(&Four, "int");
DIEString IntStr = getString("int");
Int.addValue(dwarf::DW_AT_name, dwarf::DW_FORM_strp, &IntStr);
Int.addValue(dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, &Four);
DIEInteger Five(5);
@@ -99,7 +113,7 @@ TEST(DIEHashTest, TypeWithMember) {
DIEEntry IntRef(Int);
auto Member = make_unique<DIE>(dwarf::DW_TAG_member);
DIEString MemberStr(&Four, "member");
DIEString MemberStr = getString("member");
Member->addValue(dwarf::DW_AT_name, dwarf::DW_FORM_strp, &MemberStr);
DIEInteger Zero(0);
Member->addValue(dwarf::DW_AT_data_member_location, dwarf::DW_FORM_data1,
@@ -114,14 +128,14 @@ TEST(DIEHashTest, TypeWithMember) {
}
// struct foo { int mem1, mem2; };
TEST(DIEHashTest, ReusedType) {
TEST_F(DIEHashTest, ReusedType) {
DIE Unnamed(dwarf::DW_TAG_structure_type);
DIEInteger Eight(8);
Unnamed.addValue(dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, &Eight);
DIEInteger Four(4);
DIE Int(dwarf::DW_TAG_base_type);
DIEString IntStr(&Four, "int");
DIEString IntStr = getString("int");
Int.addValue(dwarf::DW_AT_name, dwarf::DW_FORM_strp, &IntStr);
Int.addValue(dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, &Four);
DIEInteger Five(5);
@@ -130,7 +144,7 @@ TEST(DIEHashTest, ReusedType) {
DIEEntry IntRef(Int);
auto Mem1 = make_unique<DIE>(dwarf::DW_TAG_member);
DIEString Mem1Str(&Four, "mem1");
DIEString Mem1Str = getString("mem1");
Mem1->addValue(dwarf::DW_AT_name, dwarf::DW_FORM_strp, &Mem1Str);
DIEInteger Zero(0);
Mem1->addValue(dwarf::DW_AT_data_member_location, dwarf::DW_FORM_data1,
@@ -140,7 +154,7 @@ TEST(DIEHashTest, ReusedType) {
Unnamed.addChild(std::move(Mem1));
auto Mem2 = make_unique<DIE>(dwarf::DW_TAG_member);
DIEString Mem2Str(&Four, "mem2");
DIEString Mem2Str = getString("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);
@@ -154,15 +168,15 @@ TEST(DIEHashTest, ReusedType) {
}
// struct foo { static foo f; };
TEST(DIEHashTest, RecursiveType) {
TEST_F(DIEHashTest, RecursiveType) {
DIE Foo(dwarf::DW_TAG_structure_type);
DIEInteger One(1);
Foo.addValue(dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, &One);
DIEString FooStr(&One, "foo");
DIEString FooStr = getString("foo");
Foo.addValue(dwarf::DW_AT_name, dwarf::DW_FORM_strp, &FooStr);
auto Mem = make_unique<DIE>(dwarf::DW_TAG_member);
DIEString MemStr(&One, "mem");
DIEString MemStr = getString("mem");
Mem->addValue(dwarf::DW_AT_name, dwarf::DW_FORM_strp, &MemStr);
DIEEntry FooRef(Foo);
Mem->addValue(dwarf::DW_AT_type, dwarf::DW_FORM_ref4, &FooRef);
@@ -176,15 +190,15 @@ TEST(DIEHashTest, RecursiveType) {
}
// struct foo { foo *mem; };
TEST(DIEHashTest, Pointer) {
TEST_F(DIEHashTest, Pointer) {
DIE Foo(dwarf::DW_TAG_structure_type);
DIEInteger Eight(8);
Foo.addValue(dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, &Eight);
DIEString FooStr(&Eight, "foo");
DIEString FooStr = getString("foo");
Foo.addValue(dwarf::DW_AT_name, dwarf::DW_FORM_strp, &FooStr);
auto Mem = make_unique<DIE>(dwarf::DW_TAG_member);
DIEString MemStr(&Eight, "mem");
DIEString MemStr = getString("mem");
Mem->addValue(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);
@@ -205,15 +219,15 @@ TEST(DIEHashTest, Pointer) {
}
// struct foo { foo &mem; };
TEST(DIEHashTest, Reference) {
TEST_F(DIEHashTest, Reference) {
DIE Foo(dwarf::DW_TAG_structure_type);
DIEInteger Eight(8);
Foo.addValue(dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, &Eight);
DIEString FooStr(&Eight, "foo");
DIEString FooStr = getString("foo");
Foo.addValue(dwarf::DW_AT_name, dwarf::DW_FORM_strp, &FooStr);
auto Mem = make_unique<DIE>(dwarf::DW_TAG_member);
DIEString MemStr(&Eight, "mem");
DIEString MemStr = getString("mem");
Mem->addValue(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);
@@ -238,15 +252,15 @@ TEST(DIEHashTest, Reference) {
}
// struct foo { foo &&mem; };
TEST(DIEHashTest, RValueReference) {
TEST_F(DIEHashTest, RValueReference) {
DIE Foo(dwarf::DW_TAG_structure_type);
DIEInteger Eight(8);
Foo.addValue(dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, &Eight);
DIEString FooStr(&Eight, "foo");
DIEString FooStr = getString("foo");
Foo.addValue(dwarf::DW_AT_name, dwarf::DW_FORM_strp, &FooStr);
auto Mem = make_unique<DIE>(dwarf::DW_TAG_member);
DIEString MemStr(&Eight, "mem");
DIEString MemStr = getString("mem");
Mem->addValue(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);
@@ -271,15 +285,15 @@ TEST(DIEHashTest, RValueReference) {
}
// struct foo { foo foo::*mem; };
TEST(DIEHashTest, PtrToMember) {
TEST_F(DIEHashTest, PtrToMember) {
DIE Foo(dwarf::DW_TAG_structure_type);
DIEInteger Eight(8);
Foo.addValue(dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, &Eight);
DIEString FooStr(&Eight, "foo");
DIEString FooStr = getString("foo");
Foo.addValue(dwarf::DW_AT_name, dwarf::DW_FORM_strp, &FooStr);
auto Mem = make_unique<DIE>(dwarf::DW_TAG_member);
DIEString MemStr(&Eight, "mem");
DIEString MemStr = getString("mem");
Mem->addValue(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);
@@ -305,13 +319,13 @@ TEST(DIEHashTest, PtrToMember) {
//
// 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);
@@ -378,13 +392,13 @@ TEST(DIEHashTest, PtrToMemberDeclDefMatch) {
//
// 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);
@@ -451,12 +465,12 @@ TEST(DIEHashTest, PtrToMemberDeclDefMisMatch) {
// 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);
@@ -485,13 +499,13 @@ TEST(DIEHashTest, RefUnnamedType) {
}
// struct { struct foo { }; };
TEST(DIEHashTest, NestedType) {
TEST_F(DIEHashTest, NestedType) {
DIE Unnamed(dwarf::DW_TAG_structure_type);
DIEInteger One(1);
Unnamed.addValue(dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, &One);
auto Foo = make_unique<DIE>(dwarf::DW_TAG_structure_type);
DIEString FooStr(&One, "foo");
DIEString FooStr = getString("foo");
Foo->addValue(dwarf::DW_AT_name, dwarf::DW_FORM_strp, &FooStr);
Foo->addValue(dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, &One);
@@ -504,13 +518,13 @@ TEST(DIEHashTest, NestedType) {
}
// struct { static void func(); };
TEST(DIEHashTest, MemberFunc) {
TEST_F(DIEHashTest, MemberFunc) {
DIE Unnamed(dwarf::DW_TAG_structure_type);
DIEInteger One(1);
Unnamed.addValue(dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, &One);
auto Func = make_unique<DIE>(dwarf::DW_TAG_subprogram);
DIEString FuncStr(&One, "func");
DIEString FuncStr = getString("func");
Func->addValue(dwarf::DW_AT_name, dwarf::DW_FORM_strp, &FuncStr);
Unnamed.addChild(std::move(Func));
@@ -524,18 +538,18 @@ TEST(DIEHashTest, MemberFunc) {
// struct A {
// static void func();
// };
TEST(DIEHashTest, MemberFuncFlag) {
TEST_F(DIEHashTest, MemberFuncFlag) {
DIE A(dwarf::DW_TAG_structure_type);
DIEInteger One(1);
DIEString AStr(&One, "A");
DIEString AStr = getString("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);
auto Func = make_unique<DIE>(dwarf::DW_TAG_subprogram);
DIEString FuncStr(&One, "func");
DIEString FuncLinkage(&One, "_ZN1A4funcEv");
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);
@@ -557,10 +571,10 @@ TEST(DIEHashTest, MemberFuncFlag) {
// const static int PI = -3;
// };
// A a;
TEST(DIEHashTest, MemberSdata) {
TEST_F(DIEHashTest, MemberSdata) {
DIE A(dwarf::DW_TAG_structure_type);
DIEInteger One(1);
DIEString AStr(&One, "A");
DIEString AStr = getString("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);
@@ -568,7 +582,7 @@ TEST(DIEHashTest, MemberSdata) {
DIEInteger Four(4);
DIEInteger Five(5);
DIEString FStr(&One, "int");
DIEString FStr = getString("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);
@@ -580,7 +594,7 @@ TEST(DIEHashTest, MemberSdata) {
DIEEntry PITy(*PITyDIE);
auto PI = make_unique<DIE>(dwarf::DW_TAG_member);
DIEString PIStr(&One, "PI");
DIEString PIStr = getString("PI");
DIEInteger Two(2);
DIEInteger NegThree(-3);
PI->addValue(dwarf::DW_AT_name, dwarf::DW_FORM_strp, &PIStr);
@@ -602,17 +616,17 @@ TEST(DIEHashTest, MemberSdata) {
// const static float PI = 3.14;
// };
// A a;
TEST(DIEHashTest, MemberBlock) {
TEST_F(DIEHashTest, MemberBlock) {
DIE A(dwarf::DW_TAG_structure_type);
DIEInteger One(1);
DIEString AStr(&One, "A");
DIEString AStr = getString("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);
DIEInteger Four(4);
DIEString FStr(&One, "float");
DIEString FStr = getString("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);
@@ -624,7 +638,7 @@ TEST(DIEHashTest, MemberBlock) {
DIEEntry PITy(*PITyDIE);
auto PI = make_unique<DIE>(dwarf::DW_TAG_member);
DIEString PIStr(&One, "PI");
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);