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[flang][debug] Support derived type components with box types. #109424

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Sep 30, 2024
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[flang][debug] Support derived type components with box types. #109424

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d362dea
[flang][debug] Support derived type components with box types.
abidh Sep 16, 2024
01739a9
Update cyclic derived type test.
abidh Sep 20, 2024
4f81e4d
Add new line at the end of file.
abidh Sep 20, 2024
2e726b3
Handle review comments.
abidh Sep 24, 2024
9f162b3
Make llvmTypeConverter a class member.
abidh Sep 25, 2024
a45bef3
Workaround limitation in mlir handling of cyclic debug attributes.
abidh Sep 25, 2024
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39 changes: 39 additions & 0 deletions flang/include/flang/Optimizer/CodeGen/DescriptorOffsets.h
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@@ -0,0 +1,39 @@
//===-- DescriptorOffsets.h -- offsets of descriptors fields ---*- C++ -*-====//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

#ifndef OPTIMIZER_DESCRIPTOR_OFFSETS_H
#define OPTIMIZER_DESCRIPTOR_OFFSETS_H

#include "flang/Optimizer/CodeGen/DescriptorModel.h"

namespace fir {

/// Calculate offset of any field in the descriptor.
template <int Field>
static std::uint64_t getDescComponentOffset(const mlir::DataLayout &dl,
mlir::MLIRContext *context,
mlir::Type fieldType) {
static_assert(Field > 0 && Field < 8);
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mlir::Type previousFieldType = getDescFieldTypeModel<Field - 1>()(context);
std::uint64_t previousOffset =
getDescComponentOffset<Field - 1>(dl, context, previousFieldType);
std::uint64_t offset = previousOffset + dl.getTypeSize(previousFieldType);
std::uint64_t fieldAlignment = dl.getTypeABIAlignment(fieldType);
return llvm::alignTo(offset, fieldAlignment);
}

template <>
std::uint64_t getDescComponentOffset<0>(const mlir::DataLayout &dl,
mlir::MLIRContext *context,
mlir::Type fieldType) {
return 0;
}

} // namespace fir

#endif // OPTIMIZER_DESCRIPTOR_OFFSETS_H
28 changes: 28 additions & 0 deletions flang/lib/Optimizer/Dialect/FIRType.cpp
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Expand Up @@ -13,6 +13,9 @@
#include "flang/Optimizer/Dialect/FIRType.h"
#include "flang/ISO_Fortran_binding_wrapper.h"
#include "flang/Optimizer/Builder/Todo.h"
#include "flang/Optimizer/CodeGen/DescriptorModel.h"
#include "flang/Optimizer/CodeGen/DescriptorOffsets.h"
#include "flang/Optimizer/CodeGen/TypeConverter.h"
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So far I was rather against handling fir.box<> into getTypeSizeAndAlignment because to me it is meant to be an abstract type as much possible (could be implemented as a CFI descriptor, or some descriptor compatible with existing compilers if we wanted). Instead, I was more in favor of translating type to LLVM and using getTypeSizeAndAlignment at that level. That way, the codegen of abstract FIR types is centralized in the type codegen and needs not to be spilled in other places.

Now I understand this is inconvenient given there are several places that needs to know about the size at different stage of the compilation.

But as far as debugging is concerned, I would still be in favor of calling translating types to LLVM and calling getTypeSizeAndAlignment with that.

Otherwise, we at least need to centralize all low level descriptor related tools in some flang/Optimizer/Dialect/Support/DescriptorModel.h file. The Dialect library should not depend upon Codegen.

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Thanks for your comments. I have updated the PR and it does not use getTypeSizeAndAlignment to get the size for any type. We use LLVMTypeConverter to convert fieldTy into LLVM type and then use DataLayout to get the size. It all seems to works ok. My concern was whether it is safe to call DataLayout::getTypeSize on any type that is returned by LLVMTypeConverter::convertType. I did not see any problem with my testing but would be happy to add any type specific check.

#include "flang/Optimizer/Dialect/FIRDialect.h"
#include "flang/Optimizer/Dialect/Support/KindMapping.h"
#include "flang/Tools/PointerModels.h"
Expand Down Expand Up @@ -1455,6 +1458,31 @@ fir::getTypeSizeAndAlignment(mlir::Location loc, mlir::Type ty,
compSize *= character.getLen();
return std::pair{compSize, compAlign};
}
if (auto boxTy = mlir::dyn_cast<fir::BoxType>(ty)) {
mlir::MLIRContext *context = boxTy.getContext();
mlir::Type ptrType = getDescFieldTypeModel<kAddrPosInBox>()(context);
mlir::Type dimsType = getDescFieldTypeModel<kDimsPosInBox>()(context);
std::uint64_t size =
getDescComponentOffset<kDimsPosInBox>(dl, context, dimsType);
unsigned rank = getBoxRank(ty);
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What about assumed-ranks, the descriptor size is not a compile time constant? They cannot be used as derived type components, but this generic helper would need to handle them or bail correctly.

if (rank > 0) {
std::uint64_t dimsSize = dl.getTypeSize(dimsType);
size += (rank * dimsSize);
}
if (boxHasAddendum(boxTy)) {
mlir::Type optType =
getExtendedDescFieldTypeModel<kOptTypePtrPosInBox>()(context);
mlir::Type rowType =
getExtendedDescFieldTypeModel<kOptRowTypePosInBox>()(context);
std::uint64_t fieldSize = dl.getTypeSize(optType);
std::uint64_t fieldAlignment = dl.getTypeABIAlignment(optType);
size += llvm::alignTo(fieldSize, fieldAlignment);
fieldSize = dl.getTypeSize(rowType);
fieldAlignment = dl.getTypeABIAlignment(rowType);
size += llvm::alignTo(fieldSize, fieldAlignment);
}
return std::pair{size, (unsigned short)dl.getTypeSize(ptrType)};
}
return std::nullopt;
}

Expand Down
32 changes: 25 additions & 7 deletions flang/lib/Optimizer/Transforms/DebugTypeGenerator.cpp
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Expand Up @@ -13,7 +13,7 @@
#define DEBUG_TYPE "flang-debug-type-generator"

#include "DebugTypeGenerator.h"
#include "flang/Optimizer/CodeGen/DescriptorModel.h"
#include "flang/Optimizer/CodeGen/DescriptorOffsets.h"
#include "flang/Optimizer/CodeGen/TypeConverter.h"
#include "flang/Optimizer/Support/InternalNames.h"
#include "mlir/Pass/Pass.h"
Expand Down Expand Up @@ -59,11 +59,11 @@ DebugTypeGenerator::DebugTypeGenerator(mlir::ModuleOp m,
mlir::Type llvmPtrType = getDescFieldTypeModel<kAddrPosInBox>()(context);
mlir::Type llvmLenType = getDescFieldTypeModel<kElemLenPosInBox>()(context);
dimsOffset =
getComponentOffset<kDimsPosInBox>(*dataLayout, context, llvmDimsType);
getDescComponentOffset<kDimsPosInBox>(*dataLayout, context, llvmDimsType);
dimsSize = dataLayout->getTypeSize(llvmDimsType);
ptrSize = dataLayout->getTypeSize(llvmPtrType);
lenOffset =
getComponentOffset<kElemLenPosInBox>(*dataLayout, context, llvmLenType);
lenOffset = getDescComponentOffset<kElemLenPosInBox>(*dataLayout, context,
llvmLenType);
}

static mlir::LLVM::DITypeAttr genBasicType(mlir::MLIRContext *context,
Expand Down Expand Up @@ -163,15 +163,31 @@ mlir::LLVM::DITypeAttr DebugTypeGenerator::convertBoxedSequenceType(
mlir::LLVM::DITypeAttr DebugTypeGenerator::convertRecordType(
fir::RecordType Ty, mlir::LLVM::DIFileAttr fileAttr,
mlir::LLVM::DIScopeAttr scope, fir::cg::XDeclareOp declOp) {
// Check if this type has already been converted.
auto iter = typeCache.find(Ty);
if (iter != typeCache.end())
return iter->second;

llvm::SmallVector<mlir::LLVM::DINodeAttr> elements;
mlir::MLIRContext *context = module.getContext();
auto recId = mlir::DistinctAttr::create(mlir::UnitAttr::get(context));
// Generate a place holder TypeAttr which will be used if a member
// references the parent type.
auto comAttr = mlir::LLVM::DICompositeTypeAttr::get(
context, recId, /*isRecSelf=*/true, llvm::dwarf::DW_TAG_structure_type,
mlir::StringAttr::get(context, ""), fileAttr, /*line=*/0, scope,
/*baseType=*/nullptr, mlir::LLVM::DIFlags::Zero, /*sizeInBits=*/0,
/*alignInBits=*/0, elements, /*dataLocation=*/nullptr, /*rank=*/nullptr,
/*allocated=*/nullptr, /*associated=*/nullptr);
typeCache[Ty] = comAttr;

auto result = fir::NameUniquer::deconstruct(Ty.getName());
if (result.first != fir::NameUniquer::NameKind::DERIVED_TYPE)
return genPlaceholderType(context);

fir::TypeInfoOp tiOp = symbolTable->lookup<fir::TypeInfoOp>(Ty.getName());
unsigned line = (tiOp) ? getLineFromLoc(tiOp.getLoc()) : 1;

llvm::SmallVector<mlir::LLVM::DINodeAttr> elements;
std::uint64_t offset = 0;
for (auto [fieldName, fieldTy] : Ty.getTypeList()) {
auto result = fir::getTypeSizeAndAlignment(module.getLoc(), fieldTy,
Expand All @@ -195,12 +211,14 @@ mlir::LLVM::DITypeAttr DebugTypeGenerator::convertRecordType(
offset += llvm::alignTo(byteSize, byteAlign);
}

return mlir::LLVM::DICompositeTypeAttr::get(
context, llvm::dwarf::DW_TAG_structure_type,
auto finalAttr = mlir::LLVM::DICompositeTypeAttr::get(
context, recId, /*isRecSelf=*/false, llvm::dwarf::DW_TAG_structure_type,
mlir::StringAttr::get(context, result.second.name), fileAttr, line, scope,
/*baseType=*/nullptr, mlir::LLVM::DIFlags::Zero, offset * 8,
/*alignInBits=*/0, elements, /*dataLocation=*/nullptr, /*rank=*/nullptr,
/*allocated=*/nullptr, /*associated=*/nullptr);
typeCache[Ty] = finalAttr;
return finalAttr;
}

mlir::LLVM::DITypeAttr DebugTypeGenerator::convertSequenceType(
Expand Down
1 change: 1 addition & 0 deletions flang/lib/Optimizer/Transforms/DebugTypeGenerator.h
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Expand Up @@ -72,6 +72,7 @@ class DebugTypeGenerator {
std::uint64_t dimsOffset;
std::uint64_t ptrSize;
std::uint64_t lenOffset;
llvm::DenseMap<mlir::Type, mlir::LLVM::DITypeAttr> typeCache;
};

} // namespace fir
Expand Down
10 changes: 8 additions & 2 deletions flang/test/Integration/debug-cyclic-derived-type.f90
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Expand Up @@ -11,5 +11,11 @@ module m
type(t2) :: v3
end module

! CHECK-DAG: !DICompositeType(tag: DW_TAG_structure_type, name: "t1"{{.*}})
! CHECK-DAG: !DICompositeType(tag: DW_TAG_structure_type, name: "t2"{{.*}})
! CHECK-DAG: ![[T1:[0-9]+]] = {{.*}}!DICompositeType(tag: DW_TAG_structure_type, name: "t1"{{.*}}elements: ![[T1_ELEMS:[0-9]+]])
! CHECK-DAG: ![[T1_ELEMS]] = !{![[T1_ELEM1:[0-9]+]]}
! CHECK-DAG: ![[T1_ELEM1]] = !DIDerivedType(tag: DW_TAG_member, name: "p", baseType: ![[T2P:[0-9]+]]{{.*}})
! CHECK-DAG: ![[T2P]] = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: ![[T2:[0-9]+]]{{.*}})

! CHECK-DAG: ![[T2]] = {{.*}}!DICompositeType(tag: DW_TAG_structure_type, name: "t2"{{.*}}elements: ![[T2_ELEMS:[0-9]+]])
! CHECK-DAG: ![[T2_ELEMS]] = !{![[T2_ELEM1:[0-9]+]]}
! CHECK-DAG: ![[T2_ELEM1]] = !DIDerivedType(tag: DW_TAG_member, name: "v1", baseType: ![[T1]]{{.*}})
35 changes: 29 additions & 6 deletions flang/test/Transforms/debug-derived-type-1.fir
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Expand Up @@ -12,12 +12,18 @@ module attributes {dlti.dl_spec = #dlti.dl_spec<#dlti.dl_entry<!llvm.ptr<272>, d
%0 = fir.zero_bits !fir.type<_QMt1Tt_t1{age:i32,points:!fir.array<3x!fir.complex<4>>,cond:!fir.logical<1>,name:!fir.char<1,20>,ratio:f64}>
fir.has_value %0 : !fir.type<_QMt1Tt_t1{age:i32,points:!fir.array<3x!fir.complex<4>>,cond:!fir.logical<1>,name:!fir.char<1,20>,ratio:f64}>
} loc(#loc6)
fir.global @_QMtest_1Exyz : !fir.type<_QMtest_1Tsometype{m_array:!fir.array<3xi32>,m_vt1:!fir.box<!fir.heap<!fir.type<_QMtest_1Tt1{name:!fir.char<1,20>,height:f32}>>>,v2:i32,m_alloc:!fir.box<!fir.heap<!fir.array<?xi32>>>,v3:i32,m_first:!fir.box<!fir.heap<!fir.char<1,?>>>,v4:i32,m_p1:!fir.box<!fir.ptr<i32>>,v5:i32,m_p2:!fir.box<!fir.ptr<i32>>,v6:i32,m_p3:!fir.box<!fir.ptr<!fir.array<?xi32>>>,v7:i32}> {
%0 = fir.zero_bits !fir.type<_QMtest_1Tsometype{m_array:!fir.array<3xi32>,m_vt1:!fir.box<!fir.heap<!fir.type<_QMtest_1Tt1{name:!fir.char<1,20>,height:f32}>>>,v2:i32,m_alloc:!fir.box<!fir.heap<!fir.array<?xi32>>>,v3:i32,m_first:!fir.box<!fir.heap<!fir.char<1,?>>>,v4:i32,m_p1:!fir.box<!fir.ptr<i32>>,v5:i32,m_p2:!fir.box<!fir.ptr<i32>>,v6:i32,m_p3:!fir.box<!fir.ptr<!fir.array<?xi32>>>,v7:i32}>
fir.has_value %0 : !fir.type<_QMtest_1Tsometype{m_array:!fir.array<3xi32>,m_vt1:!fir.box<!fir.heap<!fir.type<_QMtest_1Tt1{name:!fir.char<1,20>,height:f32}>>>,v2:i32,m_alloc:!fir.box<!fir.heap<!fir.array<?xi32>>>,v3:i32,m_first:!fir.box<!fir.heap<!fir.char<1,?>>>,v4:i32,m_p1:!fir.box<!fir.ptr<i32>>,v5:i32,m_p2:!fir.box<!fir.ptr<i32>>,v6:i32,m_p3:!fir.box<!fir.ptr<!fir.array<?xi32>>>,v7:i32}>
} loc(#loc12)
fir.type_info @_QMt1Tt_t1 noinit nodestroy nofinal : !fir.type<_QMt1Tt_t1{age:i32,points:!fir.array<3x!fir.complex<4>>,cond:!fir.logical<1>,name:!fir.char<1,20>,ratio:f64}> loc(#loc7)
fir.type_info @_QMm_employeeTt_address noinit nodestroy nofinal : !fir.type<_QMm_employeeTt_address{house_number:i32}> loc(#loc1)
fir.type_info @_QMm_employeeTt_person noinit nodestroy nofinal extends !fir.type<_QMm_employeeTt_address{house_number:i32}> : !fir.type<_QMm_employeeTt_person{t_address:!fir.type<_QMm_employeeTt_address{house_number:i32}>,name:!fir.char<1,20>}> loc(#loc2)
fir.type_info @_QMm_employeeTt_date noinit nodestroy nofinal : !fir.type<_QMm_employeeTt_date{year:i32,month:i32,day:i32}> loc(#loc3)
fir.type_info @_QMm_employeeTt_employee noinit nodestroy nofinal extends !fir.type<_QMm_employeeTt_person{t_address:!fir.type<_QMm_employeeTt_address{house_number:i32}>,name:!fir.char<1,20>}> : !fir.type<_QMm_employeeTt_employee{t_person:!fir.type<_QMm_employeeTt_person{t_address:!fir.type<_QMm_employeeTt_address{house_number:i32}>,name:!fir.char<1,20>}>,hired_date:!fir.type<_QMm_employeeTt_date{year:i32,month:i32,day:i32}>,monthly_salary:f32}> loc(#loc4)
fir.type_info @_QFTt_pair noinit nodestroy nofinal : !fir.type<_QFTt_pair{i:i64,x:f64}> loc(#loc8)
fir.type_info @_QMtest_1Tt1 noinit nodestroy nofinal : !fir.type<_QMtest_1Tt1{name:!fir.char<1,20>,height:f32}> loc(#loc11)
fir.type_info @_QMtest_1Tsometype nofinal : !fir.type<_QMtest_1Tsometype{m_array:!fir.array<3xi32>,m_vt1:!fir.box<!fir.heap<!fir.type<_QMtest_1Tt1{name:!fir.char<1,20>,height:f32}>>>,v2:i32,m_alloc:!fir.box<!fir.heap<!fir.array<?xi32>>>,v3:i32,m_first:!fir.box<!fir.heap<!fir.char<1,?>>>,v4:i32,m_p1:!fir.box<!fir.ptr<i32>>,v5:i32,m_p2:!fir.box<!fir.ptr<i32>>,v6:i32,m_p3:!fir.box<!fir.ptr<!fir.array<?xi32>>>,v7:i32}> loc(#loc12)
func.func @_QQmain() attributes {fir.bindc_name = "test"} {
%1 = fir.alloca !fir.type<_QFTt_pair{i:i64,x:f64}> {bindc_name = "pair", uniq_name = "_QFEpair"}
%2 = fircg.ext_declare %1 {uniq_name = "_QFEpair"} : (!fir.ref<!fir.type<_QFTt_pair{i:i64,x:f64}>>) -> !fir.ref<!fir.type<_QFTt_pair{i:i64,x:f64}>> loc(#loc9)
Expand All @@ -34,6 +40,8 @@ module attributes {dlti.dl_spec = #dlti.dl_spec<#dlti.dl_entry<!llvm.ptr<272>, d
#loc8 = loc("derived1.f90":85:3)
#loc9 = loc("derived1.f90":77:3)
#loc10 = loc("derived1.f90":75:3)
#loc11 = loc("derived1.f90":95:3)
#loc12 = loc("derived1.f90":105:3)


// CHECK-DAG: #[[INT_TY:.*]] = #llvm.di_basic_type<tag = DW_TAG_base_type, name = "integer", sizeInBits = 32, encoding = DW_ATE_signed>
Expand All @@ -47,27 +55,42 @@ module attributes {dlti.dl_spec = #dlti.dl_spec<#dlti.dl_entry<!llvm.ptr<272>, d
// CHECK-DAG: #[[MOD:.*]] = #llvm.di_module<{{.*}}name = "m_employee"{{.*}}>
// CHECK-DAG: #[[MOD1:.*]] = #llvm.di_module<{{.*}}name = "t1"{{.*}}>
// CHECK-DAG: #[[ELMA1:.*]] = #llvm.di_derived_type<tag = DW_TAG_member, name = "house_number", baseType = #[[INT_TY]], sizeInBits = 32, alignInBits = 32>
// CHECK-DAG: #[[ADDR:.*]] = #llvm.di_composite_type<tag = DW_TAG_structure_type, name = "t_address"{{.*}}line = 24, scope = #[[MOD]], sizeInBits = 32, elements = #[[ELMA1]]>
// CHECK-DAG: #[[ADDR:.*]] = #llvm.di_composite_type<{{.*}}tag = DW_TAG_structure_type, name = "t_address"{{.*}}line = 24, scope = #[[MOD]], sizeInBits = 32, elements = #[[ELMA1]]>
// CHECK-DAG: #[[ELMD1:.*]] = #llvm.di_derived_type<tag = DW_TAG_member, name = "year", baseType = #[[INT_TY]], sizeInBits = 32, alignInBits = 32>
// CHECK-DAG: #[[ELMD2:.*]] = #llvm.di_derived_type<tag = DW_TAG_member, name = "month", baseType = #[[INT_TY]], sizeInBits = 32, alignInBits = 32, offsetInBits = 32>
// CHECK-DAG: #[[ELMD3:.*]] = #llvm.di_derived_type<tag = DW_TAG_member, name = "day", baseType = #[[INT_TY]], sizeInBits = 32, alignInBits = 32, offsetInBits = 64>
// CHECK-DAG: #[[DATE:.*]] = #llvm.di_composite_type<tag = DW_TAG_structure_type, name = "t_date", file = #di_file, line = 17, scope = #[[MOD]], sizeInBits = 96, elements = #[[ELMD1]], #[[ELMD2]], #[[ELMD3]]>
// CHECK-DAG: #[[DATE:.*]] = #llvm.di_composite_type<{{.*}}tag = DW_TAG_structure_type, name = "t_date", file = #di_file, line = 17, scope = #[[MOD]], sizeInBits = 96, elements = #[[ELMD1]], #[[ELMD2]], #[[ELMD3]]>
// CHECK-DAG: #[[ELMP1:.*]] = #llvm.di_derived_type<tag = DW_TAG_member, name = "t_address", baseType = #[[ADDR]], sizeInBits = 32, alignInBits = 32>
// CHECK-DAG: #[[ELMP2:.*]] = #llvm.di_derived_type<tag = DW_TAG_member, name = "name", baseType = #[[STR_TY]], sizeInBits = 160, alignInBits = 8, offsetInBits = 32>
// CHECK-DAG: #[[PERS:.*]] = #llvm.di_composite_type<tag = DW_TAG_structure_type, name = "t_person"{{.*}}line = 35, scope = #[[MOD]], sizeInBits = 192, elements = #[[ELMP1]], #[[ELMP2]]>
// CHECK-DAG: #[[PERS:.*]] = #llvm.di_composite_type<{{.*}}tag = DW_TAG_structure_type, name = "t_person"{{.*}}line = 35, scope = #[[MOD]], sizeInBits = 192, elements = #[[ELMP1]], #[[ELMP2]]>
// CHECK-DAG: #[[ELME1:.*]] = #llvm.di_derived_type<tag = DW_TAG_member, name = "t_person", baseType = #[[PERS]], sizeInBits = 192, alignInBits = 32>
// CHECK-DAG: #[[ELME2:.*]] = #llvm.di_derived_type<tag = DW_TAG_member, name = "hired_date", baseType = #[[DATE]], sizeInBits = 96, alignInBits = 32, offsetInBits = 192>
// CHECK-DAG: #[[ELME3:.*]] = #llvm.di_derived_type<tag = DW_TAG_member, name = "monthly_salary", baseType = #[[REAL4_TY]], sizeInBits = 32, alignInBits = 32, offsetInBits = 288>
// CHECK-DAG: #[[EMP:.*]] = #llvm.di_composite_type<tag = DW_TAG_structure_type, name = "t_employee"{{.*}}line = 46, scope = #[[MOD]], sizeInBits = 320, elements = #[[ELME1]], #[[ELME2]], #[[ELME3]]>
// CHECK-DAG: #[[EMP:.*]] = #llvm.di_composite_type<{{.*}}tag = DW_TAG_structure_type, name = "t_employee"{{.*}}line = 46, scope = #[[MOD]], sizeInBits = 320, elements = #[[ELME1]], #[[ELME2]], #[[ELME3]]>

// CHECK-DAG: #[[ELM1:.*]] = #llvm.di_derived_type<tag = DW_TAG_member, name = "age", baseType = #[[INT_TY]], sizeInBits = 32, alignInBits = 32>
// CHECK-DAG: #[[ELM2:.*]] = #llvm.di_derived_type<tag = DW_TAG_member, name = "points", baseType = #[[CMX_ARR]], sizeInBits = 192, alignInBits = 32, offsetInBits = 32>
// CHECK-DAG: #[[ELM3:.*]] = #llvm.di_derived_type<tag = DW_TAG_member, name = "cond", baseType = #[[LOG_TY]], sizeInBits = 8, alignInBits = 8, offsetInBits = 224>
// CHECK-DAG: #[[ELM4:.*]] = #llvm.di_derived_type<tag = DW_TAG_member, name = "name", baseType = #[[STR_TY]], sizeInBits = 160, alignInBits = 8, offsetInBits = 232>
// CHECK-DAG: #[[ELM5:.*]] = #llvm.di_derived_type<tag = DW_TAG_member, name = "ratio", baseType = #[[REAL8_TY]], sizeInBits = 64, alignInBits = 64, offsetInBits = 448>
// CHECK-DAG: #llvm.di_composite_type<tag = DW_TAG_structure_type, name = "t_t1"{{.*}}, line = 70, scope = #[[MOD1]], sizeInBits = 512, elements = #[[ELM1]], #[[ELM2]], #[[ELM3]], #[[ELM4]], #[[ELM5]]>
// CHECK-DAG: #llvm.di_composite_type<{{.*}}tag = DW_TAG_structure_type, name = "t_t1"{{.*}}, line = 70, scope = #[[MOD1]], sizeInBits = 512, elements = #[[ELM1]], #[[ELM2]], #[[ELM3]], #[[ELM4]], #[[ELM5]]>

// CHECK-DAG: #[[SP:.*]] = #llvm.di_subprogram
// CHECK-DAG: #[[ELML1:.*]] = #llvm.di_derived_type<tag = DW_TAG_member, name = "i", baseType = #[[INT8_TY]], sizeInBits = 64, alignInBits = 64>
// CHECK-DAG: #[[ELML2:.*]] = #llvm.di_derived_type<tag = DW_TAG_member, name = "x", baseType = #[[REAL8_TY]], sizeInBits = 64, alignInBits = 64, offsetInBits = 64>
// CHECK-DAG: #llvm.di_composite_type<tag = DW_TAG_structure_type, name = "t_pair"{{.*}}line = 85, scope = #di_subprogram, sizeInBits = 128, elements = #[[ELML1]], #[[ELML2]]>
// CHECK-DAG: #llvm.di_composite_type<{{.*}}tag = DW_TAG_structure_type, name = "t_pair"{{.*}}line = 85, scope = #di_subprogram, sizeInBits = 128, elements = #[[ELML1]], #[[ELML2]]>

// CHECK-DAG: #[[E1:.*]] = #llvm.di_derived_type<tag = DW_TAG_member, name = "m_array", baseType = #{{.*}}, sizeInBits = 96, alignInBits = 32>
// CHECK-DAG: #[[E2:.*]] = #llvm.di_derived_type<tag = DW_TAG_member, name = "m_vt1", baseType = #{{.*}}, sizeInBits = 320, alignInBits = 64, offsetInBits = 128>
// CHECK-DAG: #[[E3:.*]] = #llvm.di_derived_type<tag = DW_TAG_member, name = "v2", baseType = #{{.*}}, sizeInBits = 32, alignInBits = 32, offsetInBits = 448>
// CHECK-DAG: #[[E4:.*]] = #llvm.di_derived_type<tag = DW_TAG_member, name = "m_alloc", baseType = #{{.*}}, sizeInBits = 384, alignInBits = 64, offsetInBits = 512>
// CHECK-DAG: #[[E5:.*]] = #llvm.di_derived_type<tag = DW_TAG_member, name = "v3", baseType = #{{.*}}, sizeInBits = 32, alignInBits = 32, offsetInBits = 896>
// CHECK-DAG: #[[E6:.*]] = #llvm.di_derived_type<tag = DW_TAG_member, name = "m_first", baseType = #{{.*}}, sizeInBits = 192, alignInBits = 64, offsetInBits = 960>
// CHECK-DAG: #[[E7:.*]] = #llvm.di_derived_type<tag = DW_TAG_member, name = "v4", baseType = #{{.*}}, sizeInBits = 32, alignInBits = 32, offsetInBits = 1152>
// CHECK-DAG: #[[E8:.*]] = #llvm.di_derived_type<tag = DW_TAG_member, name = "m_p1", baseType = #{{.*}}, sizeInBits = 192, alignInBits = 64, offsetInBits = 1216>
// CHECK-DAG: #[[E9:.*]] = #llvm.di_derived_type<tag = DW_TAG_member, name = "v5", baseType = #{{.*}}, sizeInBits = 32, alignInBits = 32, offsetInBits = 1408>
// CHECK-DAG: #[[E10:.*]] = #llvm.di_derived_type<tag = DW_TAG_member, name = "m_p2", baseType = #{{.*}}, sizeInBits = 192, alignInBits = 64, offsetInBits = 1472>
// CHECK-DAG: #[[E11:.*]] = #llvm.di_derived_type<tag = DW_TAG_member, name = "v6", baseType = #{{.*}}, sizeInBits = 32, alignInBits = 32, offsetInBits = 1664>
// CHECK-DAG: #[[E12:.*]] = #llvm.di_derived_type<tag = DW_TAG_member, name = "m_p3", baseType = #{{.*}}, sizeInBits = 384, alignInBits = 64, offsetInBits = 1728>
// CHECK-DAG: #[[E13:.*]] = #llvm.di_derived_type<tag = DW_TAG_member, name = "v7", baseType = #{{.*}}, sizeInBits = 32, alignInBits = 32, offsetInBits = 2112>
// CHECK-DAG: #llvm.di_composite_type<{{.*}}tag = DW_TAG_structure_type, name = "sometype"{{.*}}sizeInBits = 2144, elements = #[[E1]], #[[E2]], #[[E3]], #[[E4]], #[[E5]], #[[E6]], #[[E7]], #[[E8]], #[[E9]], #[[E10]], #[[E11]], #[[E12]], #[[E13]]>
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