DebugInfo: support for DWARFv5 DW_AT_alignment attribute

* Assume that clang passes non-zero alignment value to DIBuilder
only in case when it was forced by C++11 'alignas', C11 '_Alignas'
or compiler attribute '__attribute__((aligned (N)))'.

* Emit DW_AT_alignment if alignment is specified for type/object.

Differential Revision: https://reviews.llvm.org/D24425

llvm-svn: 285181

4 files changed, 357 insertions, 4 deletions

diff --git a/llvm/test/DebugInfo/X86/align_c11.ll b/llvm/test/DebugInfo/X86/align_c11.ll
new file mode 100644
index 00000000000..0e9119de5b0
--- /dev/null
+++ b/llvm/test/DebugInfo/X86/align_c11.ll
@@ -0,0 +1,83 @@
+; RUN: %llc_dwarf -filetype=obj < %s | llvm-dwarfdump -debug-dump=info - | FileCheck %s
+; REQUIRES: object-emission
+
+; Generated by clang -c -g -std=c11 -S -emit-llvm from the following C11 source
+;
+; // every object of type struct data will be aligned to 128-byte boundary
+; struct data {
+;   char x;
+;   _Alignas(128) char arr[2];
+; };
+;
+; _Alignas(2048) struct data d; // this instance of data is aligned even stricter
+; int foo(void)
+; {
+;     struct data local_data;
+;     return 0;
+; }
+
+; CHECK: DW_TAG_variable
+; CHECK-NOT: DW_TAG
+; CHECK: DW_AT_name{{.*}}"d"
+; CHECK-NOT: DW_TAG
+; CHECK: DW_AT_alignment{{.*}}2048
+; CHECK: DW_TAG_structure_type
+; CHECK: DW_TAG_member
+; CHECK: DW_TAG_member
+; CHECK-NOT: DW_TAG
+; CHECK: DW_AT_name{{.*}}"arr"
+; CHECK-NOT: DW_TAG
+; CHECK: DW_AT_alignment{{.*}}128
+
+; ModuleID = 'test.c'
+source_filename = "test.c"
+target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-unknown-linux-gnu"
+
+%struct.data = type { i8, [127 x i8], [2 x i8], [126 x i8] }
+
+@d = common global %struct.data zeroinitializer, align 2048, !dbg !0
+
+; Function Attrs: nounwind uwtable
+define i32 @foo() #0 !dbg !17 {
+entry:
+  %local_data = alloca %struct.data, align 128
+  call void @llvm.dbg.declare(metadata %struct.data* %local_data, metadata !21, metadata !22), !dbg !23
+  ret i32 0, !dbg !24
+}
+
+; Function Attrs: nounwind readnone
+declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
+
+attributes #0 = { nounwind uwtable }
+attributes #1 = { nounwind readnone }
+
+!llvm.dbg.cu = !{!1}
+!llvm.module.flags = !{!14, !15}
+!llvm.ident = !{!16}
+
+!0 = distinct !DIGlobalVariable(name: "d", scope: !1, file: !5, line: 7, type: !6, isLocal: false, isDefinition: true, align: 16384)
+!1 = distinct !DICompileUnit(language: DW_LANG_C99, file: !2, producer: "clang version 4.0.0 (http://llvm.org/git/clang.git 9ce5220b821054019059c2ac4a9b132c7723832d) (http://llvm.org/git/llvm.git 9a6298be89ce0359b151c0a37af2776a12c69e85)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !3, globals: !4)
+!2 = !DIFile(filename: "test.c", directory: "/tmp")
+!3 = !{}
+!4 = !{!0}
+!5 = !DIFile(filename: "test.c", directory: "/tmp")
+!6 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "data", file: !5, line: 2, size: 2048, elements: !7)
+!7 = !{!8, !10}
+!8 = !DIDerivedType(tag: DW_TAG_member, name: "x", scope: !6, file: !5, line: 3, baseType: !9, size: 8)
+!9 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char)
+!10 = !DIDerivedType(tag: DW_TAG_member, name: "arr", scope: !6, file: !5, line: 4, baseType: !11, size: 16, align: 1024, offset: 1024)
+!11 = !DICompositeType(tag: DW_TAG_array_type, baseType: !9, size: 16, elements: !12)
+!12 = !{!13}
+!13 = !DISubrange(count: 2)
+!14 = !{i32 2, !"Dwarf Version", i32 4}
+!15 = !{i32 2, !"Debug Info Version", i32 3}
+!16 = !{!"clang version 4.0.0 (http://llvm.org/git/clang.git 9ce5220b821054019059c2ac4a9b132c7723832d) (http://llvm.org/git/llvm.git 9a6298be89ce0359b151c0a37af2776a12c69e85)"}
+!17 = distinct !DISubprogram(name: "foo", scope: !5, file: !5, line: 8, type: !18, isLocal: false, isDefinition: true, scopeLine: 9, flags: DIFlagPrototyped, isOptimized: false, unit: !1, variables: !3)
+!18 = !DISubroutineType(types: !19)
+!19 = !{!20}
+!20 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
+!21 = !DILocalVariable(name: "local_data", scope: !17, file: !5, line: 10, type: !6)
+!22 = !DIExpression()
+!23 = !DILocation(line: 10, column: 17, scope: !17)
+!24 = !DILocation(line: 11, column: 5, scope: !17)
diff --git a/llvm/test/DebugInfo/X86/align_cpp11.ll b/llvm/test/DebugInfo/X86/align_cpp11.ll
new file mode 100644
index 00000000000..796b6c73464
--- /dev/null
+++ b/llvm/test/DebugInfo/X86/align_cpp11.ll
@@ -0,0 +1,172 @@
+; RUN: %llc_dwarf -filetype=obj < %s | llvm-dwarfdump -debug-dump=info - | FileCheck %s
+; REQUIRES: object-emission
+
+; Generated by clang++ -c -g -std=c++11 -S -emit-llvm from the following C++11 source
+; struct S {
+;   char x;
+;   alignas(128) char xx;
+; };
+;
+; class alignas(64) C0 {
+; };
+;
+; class C1 {
+;   alignas(64) static void *p;
+; };
+;
+; enum alignas(16) E {
+;   A,
+;   B,
+;   C,
+; };
+;
+; C0 c0;
+;
+; alignas(2048) S s;
+;
+; void foo()
+; {
+;     S ss;
+;     E e;
+;     C1 c1;
+;     alignas(32) int i = 42;
+;     auto Lambda = [i](){};
+; }
+
+; CHECK: DW_TAG_class_type
+; CHECK-NOT: DW_TAG
+; CHECK: DW_AT_name{{.*}}"C0"
+; CHECK-NOT: DW_TAG
+; CHECK: DW_AT_alignment{{.*}}64
+
+; CHECK: DW_TAG_variable
+; CHECK-NOT: DW_TAG
+; CHECK: DW_AT_name{{.*}}"s"
+; CHECK-NOT: DW_TAG
+; CHECK: DW_AT_alignment{{.*}}2048
+
+; CHECK: DW_TAG_structure_type
+; CHECK: DW_TAG_member
+; CHECK: DW_AT_name{{.*}}"xx"
+; CHECK-NOT: DW_TAG
+; CHECK: DW_AT_alignment{{.*}}128
+
+; CHECK: DW_TAG_enumeration_type
+; CHECK-NOT: DW_TAG
+; CHECK: DW_AT_alignment{{.*}}16
+
+; CHECK: DW_TAG_variable
+; CHECK: DW_AT_name{{.*}}"i"
+; CHECK-NOT: DW_TAG
+; CHECK: DW_AT_alignment{{.*}}32
+; CHECK: DW_TAG_class_type
+; CHECK: DW_TAG_member
+; CHECK-NOT: DW_TAG
+; CHECK: DW_AT_name{{.*}}"i"
+; CHECK-NOT: DW_TAG
+; CHECK: DW_AT_alignment{{.*}}32
+
+; CHECK: DW_TAG_class_type
+; CHECK-NOT: DW_TAG
+; CHECK: DW_AT_name{{.*}}"C1"
+; CHECK: DW_TAG_member
+; CHECK-NOT: DW_TAG
+; CHECK: DW_AT_name{{.*}}"p"
+; CHECK-NOT: DW_TAG
+; CHECK: DW_AT_alignment{{.*}}64
+
+; ModuleID = 'test.cpp'
+source_filename = "test.cpp"
+target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-unknown-linux-gnu"
+
+%class.C0 = type { [64 x i8] }
+%struct.S = type { i8, [127 x i8], i8, [127 x i8] }
+%class.C1 = type { i8 }
+%class.anon = type { i32 }
+
+@c0 = global %class.C0 zeroinitializer, align 64, !dbg !0
+@s = global %struct.S zeroinitializer, align 2048, !dbg !11
+
+; Function Attrs: nounwind uwtable
+define void @_Z3foov() #0 !dbg !22 {
+entry:
+  %ss = alloca %struct.S, align 128
+  %e = alloca i32, align 16
+  %c1 = alloca %class.C1, align 1
+  %i = alloca i32, align 32
+  %Lambda = alloca %class.anon, align 4
+  call void @llvm.dbg.declare(metadata %struct.S* %ss, metadata !25, metadata !26), !dbg !27
+  call void @llvm.dbg.declare(metadata i32* %e, metadata !28, metadata !26), !dbg !29
+  call void @llvm.dbg.declare(metadata %class.C1* %c1, metadata !30, metadata !26), !dbg !35
+  call void @llvm.dbg.declare(metadata i32* %i, metadata !36, metadata !26), !dbg !38
+  store i32 42, i32* %i, align 32, !dbg !38
+  call void @llvm.dbg.declare(metadata %class.anon* %Lambda, metadata !39, metadata !26), !dbg !48
+  %0 = getelementptr inbounds %class.anon, %class.anon* %Lambda, i32 0, i32 0, !dbg !49
+  %1 = load i32, i32* %i, align 32, !dbg !50
+  store i32 %1, i32* %0, align 4, !dbg !49
+  ret void, !dbg !51
+}
+
+; Function Attrs: nounwind readnone
+declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
+
+attributes #0 = { nounwind uwtable }
+attributes #1 = { nounwind readnone }
+
+!llvm.dbg.cu = !{!1}
+!llvm.module.flags = !{!19, !20}
+!llvm.ident = !{!21}
+
+!0 = distinct !DIGlobalVariable(name: "c0", scope: !1, file: !5, line: 19, type: !17, isLocal: false, isDefinition: true)
+!1 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !2, producer: "clang version 4.0.0 (http://llvm.org/git/clang.git 9ce5220b821054019059c2ac4a9b132c7723832d) (http://llvm.org/git/llvm.git 9a6298be89ce0359b151c0a37af2776a12c69e85)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !3, globals: !10)
+!2 = !DIFile(filename: "test.cpp", directory: "/tmp")
+!3 = !{!4}
+!4 = !DICompositeType(tag: DW_TAG_enumeration_type, name: "E", file: !5, line: 13, size: 32, align: 128, elements: !6, identifier: "_ZTS1E")
+!5 = !DIFile(filename: "./test.cpp", directory: "/tmp")
+!6 = !{!7, !8, !9}
+!7 = !DIEnumerator(name: "A", value: 0)
+!8 = !DIEnumerator(name: "B", value: 1)
+!9 = !DIEnumerator(name: "C", value: 2)
+!10 = !{!0, !11}
+!11 = distinct !DIGlobalVariable(name: "s", scope: !1, file: !5, line: 21, type: !12, isLocal: false, isDefinition: true, align: 16384)
+!12 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "S", file: !5, line: 1, size: 2048, elements: !13, identifier: "_ZTS1S")
+!13 = !{!14, !16}
+!14 = !DIDerivedType(tag: DW_TAG_member, name: "x", scope: !12, file: !5, line: 2, baseType: !15, size: 8)
+!15 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char)
+!16 = !DIDerivedType(tag: DW_TAG_member, name: "xx", scope: !12, file: !5, line: 3, baseType: !15, size: 8, align: 1024, offset: 1024)
+!17 = distinct !DICompositeType(tag: DW_TAG_class_type, name: "C0", file: !5, line: 6, size: 512, align: 512, elements: !18, identifier: "_ZTS2C0")
+!18 = !{}
+!19 = !{i32 2, !"Dwarf Version", i32 4}
+!20 = !{i32 2, !"Debug Info Version", i32 3}
+!21 = !{!"clang version 4.0.0 (http://llvm.org/git/clang.git 9ce5220b821054019059c2ac4a9b132c7723832d) (http://llvm.org/git/llvm.git 9a6298be89ce0359b151c0a37af2776a12c69e85)"}
+!22 = distinct !DISubprogram(name: "foo", linkageName: "_Z3foov", scope: !5, file: !5, line: 23, type: !23, isLocal: false, isDefinition: true, scopeLine: 24, flags: DIFlagPrototyped, isOptimized: false, unit: !1, variables: !18)
+!23 = !DISubroutineType(types: !24)
+!24 = !{null}
+!25 = !DILocalVariable(name: "ss", scope: !22, file: !5, line: 25, type: !12)
+!26 = !DIExpression()
+!27 = !DILocation(line: 25, column: 7, scope: !22)
+!28 = !DILocalVariable(name: "e", scope: !22, file: !5, line: 26, type: !4)
+!29 = !DILocation(line: 26, column: 7, scope: !22)
+!30 = !DILocalVariable(name: "c1", scope: !22, file: !5, line: 27, type: !31)
+!31 = distinct !DICompositeType(tag: DW_TAG_class_type, name: "C1", file: !5, line: 9, size: 8, elements: !32, identifier: "_ZTS2C1")
+!32 = !{!33}
+!33 = !DIDerivedType(tag: DW_TAG_member, name: "p", scope: !31, file: !5, line: 10, baseType: !34, align: 512, flags: DIFlagStaticMember)
+!34 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
+!35 = !DILocation(line: 27, column: 8, scope: !22)
+!36 = !DILocalVariable(name: "i", scope: !22, file: !5, line: 28, type: !37, align: 256)
+!37 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
+!38 = !DILocation(line: 28, column: 21, scope: !22)
+!39 = !DILocalVariable(name: "Lambda", scope: !22, file: !5, line: 29, type: !40)
+!40 = distinct !DICompositeType(tag: DW_TAG_class_type, scope: !22, file: !5, line: 29, size: 32, elements: !41)
+!41 = !{!42, !43}
+!42 = !DIDerivedType(tag: DW_TAG_member, name: "i", scope: !40, file: !5, line: 29, baseType: !37, size: 32, align: 256)
+!43 = !DISubprogram(name: "operator()", scope: !40, file: !5, line: 29, type: !44, isLocal: false, isDefinition: false, scopeLine: 29, flags: DIFlagPublic | DIFlagPrototyped, isOptimized: false)
+!44 = !DISubroutineType(types: !45)
+!45 = !{null, !46}
+!46 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !47, size: 64, flags: DIFlagArtificial | DIFlagObjectPointer)
+!47 = !DIDerivedType(tag: DW_TAG_const_type, baseType: !40)
+!48 = !DILocation(line: 29, column: 10, scope: !22)
+!49 = !DILocation(line: 29, column: 19, scope: !22)
+!50 = !DILocation(line: 29, column: 20, scope: !22)
+!51 = !DILocation(line: 30, column: 1, scope: !22)
diff --git a/llvm/test/DebugInfo/X86/align_objc.ll b/llvm/test/DebugInfo/X86/align_objc.ll
new file mode 100644
index 00000000000..c82d1a53555
--- /dev/null
+++ b/llvm/test/DebugInfo/X86/align_objc.ll
@@ -0,0 +1,98 @@
+; RUN: %llc_dwarf -filetype=obj < %s | llvm-dwarfdump -debug-dump=info - | FileCheck %s
+; REQUIRES: object-emission
+
+; typedef struct __attribute__((aligned (128))) {
+;   char c;
+; } S0;
+;
+; typedef struct {
+;   __attribute__((aligned (64))) char c;
+; } S1;
+;
+; S0 s0;
+;
+; void f() {
+;   S1 s1;
+;   __attribute__((aligned (32))) int i;
+; }
+
+; CHECK: DW_TAG_typedef
+; CHECK-NOT: DW_TAG
+; CHECK: DW_AT_name{{.*}}"S0"
+; CHECK: DW_TAG_structure_type
+; CHECK-NOT: DW_TAG
+; CHECK: DW_AT_alignment{{.*}}128
+
+; CHECK: DW_TAG_variable
+; CHECK: DW_AT_name{{.*}}"i"
+; CHECK-NOT: DW_TAG
+; CHECK: DW_AT_alignment{{.*}}32
+
+; CHECK: DW_TAG_typedef
+; CHECK-NOT: DW_TAG
+; CHECK: DW_AT_name{{.*}}"S1"
+; CHECK: DW_TAG_structure_type
+; CHECK: DW_TAG_member
+; CHECK-NOT: DW_TAG
+; CHECK: DW_AT_name{{.*}}"c"
+; CHECK-NOT: DW_TAG
+; CHECK: DW_AT_alignment{{.*}}64
+
+; ModuleID = 'test.m'
+source_filename = "test.m"
+target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-unknown-linux-gnu"
+
+%struct.S0 = type { i8, [127 x i8] }
+%struct.S1 = type { i8, [63 x i8] }
+
+@s0 = common global %struct.S0 zeroinitializer, align 128, !dbg !0
+
+; Function Attrs: nounwind uwtable
+define void @f() #0 !dbg !14 {
+entry:
+  %s1 = alloca %struct.S1, align 64
+  %i = alloca i32, align 32
+  call void @llvm.dbg.declare(metadata %struct.S1* %s1, metadata !17, metadata !22), !dbg !23
+  call void @llvm.dbg.declare(metadata i32* %i, metadata !24, metadata !22), !dbg !26
+  ret void, !dbg !27
+}
+
+; Function Attrs: nounwind readnone
+declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
+
+attributes #0 = { nounwind uwtable }
+attributes #1 = { nounwind readnone }
+
+!llvm.dbg.cu = !{!1}
+!llvm.module.flags = !{!11, !12}
+!llvm.ident = !{!13}
+
+!0 = distinct !DIGlobalVariable(name: "s0", scope: !1, file: !5, line: 10, type: !6, isLocal: false, isDefinition: true)
+!1 = distinct !DICompileUnit(language: DW_LANG_ObjC, file: !2, producer: "clang version 4.0.0 (http://llvm.org/git/clang.git 9ce5220b821054019059c2ac4a9b132c7723832d) (http://llvm.org/git/llvm.git 9a6298be89ce0359b151c0a37af2776a12c69e85)", isOptimized: false, runtimeVersion: 1, emissionKind: FullDebug, enums: !3, globals: !4)
+!2 = !DIFile(filename: "test.m", directory: "/tmp")
+!3 = !{}
+!4 = !{!0}
+!5 = !DIFile(filename: "test.m", directory: "/tmp")
+!6 = !DIDerivedType(tag: DW_TAG_typedef, name: "S0", file: !5, line: 3, baseType: !7)
+!7 = distinct !DICompositeType(tag: DW_TAG_structure_type, file: !5, line: 1, size: 1024, align: 1024, elements: !8)
+!8 = !{!9}
+!9 = !DIDerivedType(tag: DW_TAG_member, name: "c", scope: !7, file: !5, line: 2, baseType: !10, size: 8)
+!10 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char)
+!11 = !{i32 2, !"Dwarf Version", i32 4}
+!12 = !{i32 2, !"Debug Info Version", i32 3}
+!13 = !{!"clang version 4.0.0 (http://llvm.org/git/clang.git 9ce5220b821054019059c2ac4a9b132c7723832d) (http://llvm.org/git/llvm.git 9a6298be89ce0359b151c0a37af2776a12c69e85)"}
+!14 = distinct !DISubprogram(name: "f", scope: !5, file: !5, line: 12, type: !15, isLocal: false, isDefinition: true, scopeLine: 12, isOptimized: false, unit: !1, variables: !3)
+!15 = !DISubroutineType(types: !16)
+!16 = !{null}
+!17 = !DILocalVariable(name: "s1", scope: !14, file: !5, line: 13, type: !18)
+!18 = !DIDerivedType(tag: DW_TAG_typedef, name: "S1", file: !5, line: 8, baseType: !19)
+!19 = distinct !DICompositeType(tag: DW_TAG_structure_type, file: !5, line: 6, size: 512, elements: !20)
+!20 = !{!21}
+!21 = !DIDerivedType(tag: DW_TAG_member, name: "c", scope: !19, file: !5, line: 7, baseType: !10, size: 8, align: 512)
+!22 = !DIExpression()
+!23 = !DILocation(line: 13, column: 6, scope: !14)
+!24 = !DILocalVariable(name: "i", scope: !14, file: !5, line: 14, type: !25, align: 256)
+!25 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
+!26 = !DILocation(line: 14, column: 37, scope: !14)
+!27 = !DILocation(line: 15, column: 1, scope: !14)
diff --git a/llvm/test/DebugInfo/X86/dwarf-public-names.ll b/llvm/test/DebugInfo/X86/dwarf-public-names.ll
index 70fdb5b758c..c28f793774a 100644
--- a/llvm/test/DebugInfo/X86/dwarf-public-names.ll
+++ b/llvm/test/DebugInfo/X86/dwarf-public-names.ll
@@ -102,11 +102,11 @@ attributes #1 = { nounwind readnone }
 !4 = !DIFile(filename: "dwarf-public-names.cpp", directory: "/usr2/kparzysz/s.hex/t")
 !5 = !DISubroutineType(types: !6)
 !6 = !{null, !7}
-!7 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, flags: DIFlagArtificial | DIFlagObjectPointer, baseType: !8)
-!8 = !DICompositeType(tag: DW_TAG_structure_type, name: "C", line: 1, size: 8, align: 8, file: !37, elements: !9)
+!7 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, flags: DIFlagArtificial | DIFlagObjectPointer, baseType: !8)
+!8 = !DICompositeType(tag: DW_TAG_structure_type, name: "C", line: 1, size: 8, file: !37, elements: !9)
 !9 = !{!10, !12, !14}
 !10 = !DIDerivedType(tag: DW_TAG_member, name: "static_member_variable", line: 4, flags: DIFlagStaticMember, file: !37, scope: !8, baseType: !11)
-!11 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
+!11 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, encoding: DW_ATE_signed)
 !12 = !DISubprogram(name: "member_function", linkageName: "_ZN1C15member_functionEv", line: 2, isLocal: false, isDefinition: false, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, scopeLine: 2, file: !4, scope: !8, type: !5, variables: !13)
 !13 = !{} ; previously: invalid DW_TAG_base_type
 !14 = !DISubprogram(name: "static_member_function", linkageName: "_ZN1C22static_member_functionEv", line: 3, isLocal: false, isDefinition: false, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, scopeLine: 3, file: !4, scope: !8, type: !15, variables: !17)
@@ -124,7 +124,7 @@ attributes #1 = { nounwind readnone }
 !26 = !DIGlobalVariable(name: "global_variable", line: 17, isLocal: false, isDefinition: true, scope: null, file: !4, type: !8)
 !27 = !DIGlobalVariable(name: "global_namespace_variable", linkageName: "_ZN2ns25global_namespace_variableE", line: 27, isLocal: false, isDefinition: true, scope: !21, file: !4, type: !11)
 !28 = !DILocalVariable(name: "this", line: 9, arg: 1, flags: DIFlagArtificial | DIFlagObjectPointer, scope: !3, file: !4, type: !29)
-!29 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, baseType: !8)
+!29 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, baseType: !8)
 !30 = !DILocation(line: 9, scope: !3)
 !31 = !DILocation(line: 10, scope: !3)
 !32 = !DILocation(line: 11, scope: !3)