Nerixyz 91b90652bb
Reland "[CodeView] Generate S_DEFRANGE_REGISTER_REL_INDIR" (#189401)
Initially added in #187709. It was reverted in #188833, because
[llvm-clang-x86_64-sie-win](https://lab.llvm.org/buildbot/#/builders/46/builds/32873)
was failing in
`cross-project-tests/debuginfo-tests/dexter-tests/nrvo.cpp`.

The test passed for me locally. After checking on another machine, I
found that `S_DEFRANGE_REGISTER_REL_INDIR` is only supported by
dbgeng/WinDbg from Windows 10.0 Build 19041 (released 2020) onwards.
SDKs before this will fail to read the value. That buildbot is on
Windows 10.0 Build 17763.

I'm not sure if we should make the generation of that record
conditional. Debuggers that can't read the record will skip it. They'll
still see that there's some local variable, but won't be able to display
the value.

As far as I know, users of older Windows 10 builds should be able to
install a newer Windows SDK and use the WinDbg from that version. But I
haven't tested that.
2026-04-02 12:15:11 +02:00

438 lines
20 KiB
LLVM

; RUN: llc < %s -experimental-debug-variable-locations=true | FileCheck %s --check-prefix=ASM
; RUN: llc < %s -filetype=obj -experimental-debug-variable-locations=true | llvm-readobj --codeview - | FileCheck %s --check-prefix=OBJ
; Compile with -O1 as C
; struct IntPair { int x, y; };
; struct PadRight { long a; int b; };
; struct PadLeft { int a; long b; };
; struct Nested { struct PadLeft a[2]; };
;
; extern int g(int r);
; extern int i;
; extern int n;
;
; int loop_csr() {
; struct IntPair o = {0, 0};
; for (i = 0; i < n; i++) {
; o.x = g(o.x);
; o.y = g(o.y);
; }
; return o.x + o.y;
; }
;
; int pad_right(struct PadRight o) {
; return o.b;
; }
;
; int pad_left(struct PadLeft o) {
; return o.a;
; }
;
; int nested(struct Nested o) {
; struct PadLeft p = o.a[1];
; return p.b;
; }
; ASM-LABEL: loop_csr: # @loop_csr
; ASM: #DEBUG_VALUE: loop_csr:o <- [DW_OP_LLVM_fragment 0 32] 0
; ASM: #DEBUG_VALUE: loop_csr:o <- [DW_OP_LLVM_fragment 32 32] 0
; ASM: # %bb.2: # %for.body.preheader
; ASM: xorl %edi, %edi
; ASM: xorl %esi, %esi
; ASM: [[oy_ox_start:\.Ltmp[0-9]+]]:
; ASM: .p2align 4
; ASM: .LBB0_3: # %for.body
; ASM: #DEBUG_VALUE: loop_csr:o <- [DW_OP_LLVM_fragment 0 32] $edi
; ASM: #DEBUG_VALUE: loop_csr:o <- [DW_OP_LLVM_fragment 32 32] $esi
; ASM: .cv_loc 0 1 13 11 # t.c:13:11
; ASM: movl %edi, %ecx
; ASM: callq g
; ASM: movl %eax, %edi
; ASM: [[ox_start:\.Ltmp[0-9]+]]:
; ASM: #DEBUG_VALUE: loop_csr:o <- [DW_OP_LLVM_fragment 0 32] $edi
; ASM: .cv_loc 0 1 14 11 # t.c:14:11
; ASM: movl %esi, %ecx
; ASM: callq g
; ASM: movl %eax, %esi
; ASM: [[oy_start:\.Ltmp[0-9]+]]:
; ASM: #DEBUG_VALUE: loop_csr:o <- [DW_OP_LLVM_fragment 32 32] $esi
; ASM: cmpl n(%rip), %eax
; ASM: jl .LBB0_3
; ASM: [[loopskip_start:\.Ltmp[0-9]+]]:
; ASM: #DEBUG_VALUE: loop_csr:o <- [DW_OP_LLVM_fragment 0 32] 0
; ASM: xorl %esi, %esi
; ASM: xorl %edi, %edi
; ASM: [[oy_end:\.Ltmp[0-9]+]]:
; ASM: addl %edi, %esi
; ASM: movl %esi, %eax
; XXX FIXME: the debug value line after loopskip_start should be repeated
; because both fields of 'o' are zero flowing into this block. However, it
; appears livedebugvalues doesn't account for fragments.
; ASM-LABEL: pad_right: # @pad_right
; ASM: movq %rcx, %rax
; ASM: [[pad_right_tmp:\.Ltmp[0-9]+]]:
; ASM: #DEBUG_VALUE: pad_right:o <- [DW_OP_LLVM_fragment 32 32] $eax
; ASM: retq
; ASM: [[pad_right_end:\.Lfunc_end1]]:
; ASM-LABEL: pad_left: # @pad_left
; ASM: .cv_loc 2 1 24 3 # t.c:24:3
; ASM: movq %rcx, %rax
; ASM: [[pad_left_tmp:\.Ltmp[0-9]+]]:
; ASM: #DEBUG_VALUE: pad_left:o <- [DW_OP_LLVM_fragment 0 32] $ecx
; ASM: retq
; ASM: [[pad_left_end:\.Lfunc_end2]]:
; ASM-LABEL: nested: # @nested
; ASM: #DEBUG_VALUE: nested:o <- [DW_OP_deref] [$rcx+0]
; ASM: movl 12(%rcx), %eax
; ASM: [[p_start:\.Ltmp[0-9]+]]:
; ASM: #DEBUG_VALUE: nested:p <- [DW_OP_LLVM_fragment 32 32] $eax
; ASM: retq
; ASM-LABEL: bitpiece_spill: # @bitpiece_spill
; ASM: #DEBUG_VALUE: bitpiece_spill:o <- [DW_OP_LLVM_fragment 0 32] 0
; ASM: xorl %ecx, %ecx
; ASM: callq g
; ASM: movl %eax, [[offset_o_x:[0-9]+]](%rsp) # 4-byte Spill
; ASM: [[spill_o_x_start:\.Ltmp[0-9]+]]:
; ASM: #DEBUG_VALUE: bitpiece_spill:o <- [DW_OP_plus_uconst [[offset_o_x]], DW_OP_deref, DW_OP_LLVM_fragment 32 32] $rsp
; ASM: #APP
; ASM: #NO_APP
; ASM: movl [[offset_o_x]](%rsp), %eax # 4-byte Reload
; ASM: retq
; ASM: [[spill_o_x_end_func:\.Ltmp[0-9]+]]:
; ASM-NEXT: .Lfunc_end4:
; ASM-LABEL: .short 4423 # Record kind: S_GPROC32_ID
; ASM: .asciz "loop_csr" # Function name
; ASM: .short 4359 # Record kind: S_CONSTANT
; ASM: .long 4099 # Type
; ASM: .byte 0x00, 0x00 # Value
; ASM: .asciz "o"
; OBJ-LABEL: GlobalProcIdSym {
; OBJ: Kind: S_GPROC32_ID (0x1147)
; OBJ: DisplayName: loop_csr
; OBJ: }
; OBJ: ConstantSym {
; OBJ: Kind: S_CONSTANT (0x1107)
; OBJ: Type: IntPair (0x1003)
; OBJ: Value: 0
; OBJ: Name: o
; OBJ: }
; OBJ: ProcEnd {
; OBJ: }
; ASM-LABEL: .short 4423 # Record kind: S_GPROC32_ID
; ASM: .asciz "pad_right" # Function name
; ASM: .short 4414 # Record kind: S_LOCAL
; ASM: .asciz "o"
; ASM: .cv_def_range [[pad_right_tmp]] [[pad_right_end]], subfield_reg, 17, 4
; OBJ-LABEL: GlobalProcIdSym {
; OBJ: Kind: S_GPROC32_ID (0x1147)
; OBJ: DisplayName: pad_right
; OBJ: }
; OBJ: LocalSym {
; OBJ: VarName: o
; OBJ: }
; OBJ: DefRangeSubfieldRegisterSym {
; OBJ: Register: EAX (0x11)
; OBJ: MayHaveNoName: 0
; OBJ: OffsetInParent: 4
; OBJ: LocalVariableAddrRange {
; OBJ: }
; OBJ: }
; OBJ: ProcEnd {
; OBJ: }
; ASM-LABEL: .short 4423 # Record kind: S_GPROC32_ID
; ASM: .asciz "pad_left" # Function name
; ASM: .short 4414 # Record kind: S_LOCAL
; ASM: .asciz "o"
; ASM: .cv_def_range [[pad_left_tmp]] [[pad_left_end]], subfield_reg, 18, 0
; OBJ-LABEL: GlobalProcIdSym {
; OBJ: Kind: S_GPROC32_ID (0x1147)
; OBJ: DisplayName: pad_left
; OBJ: }
; OBJ: LocalSym {
; OBJ: VarName: o
; OBJ: }
; OBJ: DefRangeSubfieldRegisterSym {
; OBJ: Register: ECX (0x12)
; OBJ: MayHaveNoName: 0
; OBJ: OffsetInParent: 0
; OBJ: LocalVariableAddrRange {
; OBJ: }
; OBJ: }
; OBJ: ProcEnd {
; OBJ: }
; ASM-LABEL: .short 4423 # Record kind: S_GPROC32_ID
; ASM: .asciz "nested" # Function name
; ASM: .short 4414 # Record kind: S_LOCAL
; ASM: .long 4123 # TypeIndex
; ASM: .asciz "o"
; ASM: .cv_def_range .Lfunc_begin3 .Lfunc_end3, reg_rel_indir, 330, 0, 0, 0
; ASM: .short 4414 # Record kind: S_LOCAL
; ASM: .asciz "p"
; ASM: .cv_def_range [[p_start]] .Lfunc_end3, subfield_reg, 17, 4
; OBJ-LABEL: GlobalProcIdSym {
; OBJ: Kind: S_GPROC32_ID (0x1147)
; OBJ: DisplayName: nested
; OBJ: }
; OBJ: LocalSym {
; OBJ: Type: Nested
; OBJ: VarName: o
; OBJ: }
; OBJ: DefRangeRegisterRelIndirSym {
; OBJ: BaseRegister: RCX (0x14A)
; OBJ: HasSpilledUDTMember: No
; OBJ: OffsetInParent: 0
; OBJ: BasePointerOffset: 0
; OBJ: OffsetInUDT: 0
; OBJ: LocalVariableAddrRange {
; OBJ: }
; OBJ: }
; OBJ: LocalSym {
; OBJ: VarName: p
; OBJ: }
; OBJ: DefRangeSubfieldRegisterSym {
; OBJ: Register: EAX (0x11)
; OBJ: MayHaveNoName: 0
; OBJ: OffsetInParent: 4
; OBJ: LocalVariableAddrRange {
; OBJ: }
; OBJ: }
; OBJ: ProcEnd {
; OBJ: }
; ASM-LABEL: .short 4423 # Record kind: S_GPROC32_ID
; ASM: .asciz "bitpiece_spill" # Function name
; ASM: .short 4359 # Record kind: S_CONSTANT
; ASM: .long 4099 # Type
; ASM: .byte 0x00, 0x00 # Value
; ASM: .asciz "o" # Name
; OBJ-LABEL: GlobalProcIdSym {
; OBJ: Kind: S_GPROC32_ID (0x1147)
; OBJ: DisplayName: bitpiece_spill
; OBJ: }
; OBJ: ConstantSym {
; OBJ: Kind: S_CONSTANT (0x1107)
; OBJ: Type: IntPair (0x1003)
; OBJ: Value: 0
; OBJ: Name: o
; OBJ: }
; OBJ: ProcEnd {
; OBJ: }
; ModuleID = 't.c'
source_filename = "t.c"
target datalayout = "e-m:w-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-pc-windows-msvc19.0.24210"
%struct.IntPair = type { i32, i32 }
%struct.PadRight = type { i32, i32 }
%struct.PadLeft = type { i32, i32 }
%struct.Nested = type { [2 x %struct.PadLeft] }
@i = external local_unnamed_addr global i32, align 4
@n = external local_unnamed_addr global i32, align 4
; Function Attrs: nounwind uwtable
define i32 @loop_csr() local_unnamed_addr #0 !dbg !7 {
entry:
tail call void @llvm.dbg.declare(metadata ptr undef, metadata !12, metadata !17), !dbg !18
tail call void @llvm.dbg.value(metadata i32 0, metadata !12, metadata !19), !dbg !18
tail call void @llvm.dbg.value(metadata i32 0, metadata !12, metadata !20), !dbg !18
tail call void @llvm.dbg.value(metadata i32 0, metadata !12, metadata !19), !dbg !18
tail call void @llvm.dbg.value(metadata i32 0, metadata !12, metadata !20), !dbg !18
store i32 0, ptr @i, align 4, !dbg !21, !tbaa !24
%0 = load i32, ptr @n, align 4, !dbg !28, !tbaa !24
%cmp9 = icmp sgt i32 %0, 0, !dbg !29
br i1 %cmp9, label %for.body, label %for.end, !dbg !30
for.body: ; preds = %entry, %for.body
%o.sroa.0.011 = phi i32 [ %call, %for.body ], [ 0, %entry ]
%o.sroa.5.010 = phi i32 [ %call2, %for.body ], [ 0, %entry ]
tail call void @llvm.dbg.value(metadata i32 %o.sroa.0.011, metadata !12, metadata !19), !dbg !18
tail call void @llvm.dbg.value(metadata i32 %o.sroa.5.010, metadata !12, metadata !20), !dbg !18
%call = tail call i32 @g(i32 %o.sroa.0.011) #5, !dbg !31
tail call void @llvm.dbg.value(metadata i32 %call, metadata !12, metadata !19), !dbg !18
%call2 = tail call i32 @g(i32 %o.sroa.5.010) #5, !dbg !33
tail call void @llvm.dbg.value(metadata i32 %call2, metadata !12, metadata !20), !dbg !18
%1 = load i32, ptr @i, align 4, !dbg !21, !tbaa !24
%inc = add nsw i32 %1, 1, !dbg !21
store i32 %inc, ptr @i, align 4, !dbg !21, !tbaa !24
%2 = load i32, ptr @n, align 4, !dbg !28, !tbaa !24
%cmp = icmp slt i32 %inc, %2, !dbg !29
br i1 %cmp, label %for.body, label %for.end, !dbg !30, !llvm.loop !34
for.end: ; preds = %for.body, %entry
%o.sroa.5.0.lcssa = phi i32 [ 0, %entry ], [ %call2, %for.body ]
%o.sroa.0.0.lcssa = phi i32 [ 0, %entry ], [ %call, %for.body ]
%add = add nsw i32 %o.sroa.0.0.lcssa, %o.sroa.5.0.lcssa, !dbg !36
ret i32 %add, !dbg !37
}
; Function Attrs: nounwind readnone
declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
declare i32 @g(i32) local_unnamed_addr #2
; Function Attrs: nounwind readnone uwtable
define i32 @pad_right(i64 %o.coerce) local_unnamed_addr #3 !dbg !38 {
entry:
%o.sroa.1.0.extract.shift = lshr i64 %o.coerce, 32
%o.sroa.1.0.extract.trunc = trunc i64 %o.sroa.1.0.extract.shift to i32
tail call void @llvm.dbg.value(metadata i32 %o.sroa.1.0.extract.trunc, metadata !47, metadata !20), !dbg !48
tail call void @llvm.dbg.declare(metadata ptr undef, metadata !47, metadata !17), !dbg !48
ret i32 %o.sroa.1.0.extract.trunc, !dbg !49
}
; Function Attrs: nounwind readnone uwtable
define i32 @pad_left(i64 %o.coerce) local_unnamed_addr #3 !dbg !50 {
entry:
%o.sroa.0.0.extract.trunc = trunc i64 %o.coerce to i32
tail call void @llvm.dbg.value(metadata i32 %o.sroa.0.0.extract.trunc, metadata !58, metadata !19), !dbg !59
tail call void @llvm.dbg.declare(metadata ptr undef, metadata !58, metadata !17), !dbg !59
ret i32 %o.sroa.0.0.extract.trunc, !dbg !60
}
; Function Attrs: nounwind readonly uwtable
define i32 @nested(ptr nocapture readonly %o) local_unnamed_addr #4 !dbg !61 {
entry:
tail call void @llvm.dbg.declare(metadata ptr %o, metadata !71, metadata !73), !dbg !74
tail call void @llvm.dbg.declare(metadata ptr undef, metadata !72, metadata !17), !dbg !75
%p.sroa.3.0..sroa_idx2 = getelementptr inbounds %struct.Nested, ptr %o, i64 0, i32 0, i64 1, i32 1, !dbg !76
%p.sroa.3.0.copyload = load i32, ptr %p.sroa.3.0..sroa_idx2, align 4, !dbg !76
tail call void @llvm.dbg.value(metadata i32 %p.sroa.3.0.copyload, metadata !72, metadata !20), !dbg !75
ret i32 %p.sroa.3.0.copyload, !dbg !77
}
; Function Attrs: nounwind uwtable
define i32 @bitpiece_spill() local_unnamed_addr #0 !dbg !78 {
entry:
tail call void @llvm.dbg.declare(metadata ptr undef, metadata !80, metadata !17), !dbg !81
tail call void @llvm.dbg.value(metadata i32 0, metadata !80, metadata !19), !dbg !81
%call = tail call i32 @g(i32 0) #5, !dbg !82
tail call void @llvm.dbg.value(metadata i32 %call, metadata !80, metadata !20), !dbg !81
tail call void asm sideeffect "", "~{rax},~{rbx},~{rcx},~{rdx},~{rsi},~{rdi},~{rbp},~{r8},~{r9},~{r10},~{r11},~{r12},~{r13},~{r14},~{r15},~{dirflag},~{fpsr},~{flags}"() #5, !dbg !83, !srcloc !84
ret i32 %call, !dbg !85
}
; Function Attrs: nounwind readnone
declare void @llvm.dbg.value(metadata, metadata, metadata) #1
attributes #0 = { nounwind uwtable "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "frame-pointer"="none" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+fxsr,+mmx,+sse,+sse2,+x87" "use-soft-float"="false" }
attributes #1 = { nounwind readnone }
attributes #2 = { "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "frame-pointer"="none" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+fxsr,+mmx,+sse,+sse2,+x87" "use-soft-float"="false" }
attributes #3 = { nounwind readnone uwtable "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "frame-pointer"="none" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+fxsr,+mmx,+sse,+sse2,+x87" "use-soft-float"="false" }
attributes #4 = { nounwind readonly uwtable "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "frame-pointer"="none" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+fxsr,+mmx,+sse,+sse2,+x87" "use-soft-float"="false" }
attributes #5 = { nounwind }
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!3, !4, !5}
!llvm.ident = !{!6}
!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 4.0.0 (trunk 283332) (llvm/trunk 283355)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
!1 = !DIFile(filename: "t.c", directory: "C:\5Csrc\5Cllvm\5Cbuild")
!2 = !{}
!3 = !{i32 2, !"CodeView", i32 1}
!4 = !{i32 2, !"Debug Info Version", i32 3}
!5 = !{i32 1, !"PIC Level", i32 2}
!6 = !{!"clang version 4.0.0 (trunk 283332) (llvm/trunk 283355)"}
!7 = distinct !DISubprogram(name: "loop_csr", scope: !1, file: !1, line: 10, type: !8, isLocal: false, isDefinition: true, scopeLine: 10, isOptimized: true, unit: !0, retainedNodes: !11)
!8 = !DISubroutineType(types: !9)
!9 = !{!10}
!10 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
!11 = !{!12}
!12 = !DILocalVariable(name: "o", scope: !7, file: !1, line: 11, type: !13)
!13 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "IntPair", file: !1, line: 1, size: 64, align: 32, elements: !14)
!14 = !{!15, !16}
!15 = !DIDerivedType(tag: DW_TAG_member, name: "x", scope: !13, file: !1, line: 1, baseType: !10, size: 32, align: 32)
!16 = !DIDerivedType(tag: DW_TAG_member, name: "y", scope: !13, file: !1, line: 1, baseType: !10, size: 32, align: 32, offset: 32)
!17 = !DIExpression()
!18 = !DILocation(line: 11, column: 18, scope: !7)
!19 = !DIExpression(DW_OP_LLVM_fragment, 0, 32)
!20 = !DIExpression(DW_OP_LLVM_fragment, 32, 32)
!21 = !DILocation(line: 12, column: 23, scope: !22)
!22 = distinct !DILexicalBlock(scope: !23, file: !1, line: 12, column: 3)
!23 = distinct !DILexicalBlock(scope: !7, file: !1, line: 12, column: 3)
!24 = !{!25, !25, i64 0}
!25 = !{!"int", !26, i64 0}
!26 = !{!"omnipotent char", !27, i64 0}
!27 = !{!"Simple C/C++ TBAA"}
!28 = !DILocation(line: 12, column: 19, scope: !22)
!29 = !DILocation(line: 12, column: 17, scope: !22)
!30 = !DILocation(line: 12, column: 3, scope: !23)
!31 = !DILocation(line: 13, column: 11, scope: !32)
!32 = distinct !DILexicalBlock(scope: !22, file: !1, line: 12, column: 27)
!33 = !DILocation(line: 14, column: 11, scope: !32)
!34 = distinct !{!34, !35}
!35 = !DILocation(line: 12, column: 3, scope: !7)
!36 = !DILocation(line: 16, column: 14, scope: !7)
!37 = !DILocation(line: 16, column: 3, scope: !7)
!38 = distinct !DISubprogram(name: "pad_right", scope: !1, file: !1, line: 19, type: !39, isLocal: false, isDefinition: true, scopeLine: 19, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !46)
!39 = !DISubroutineType(types: !40)
!40 = !{!10, !41}
!41 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "PadRight", file: !1, line: 2, size: 64, align: 32, elements: !42)
!42 = !{!43, !45}
!43 = !DIDerivedType(tag: DW_TAG_member, name: "a", scope: !41, file: !1, line: 2, baseType: !44, size: 32, align: 32)
!44 = !DIBasicType(name: "long int", size: 32, align: 32, encoding: DW_ATE_signed)
!45 = !DIDerivedType(tag: DW_TAG_member, name: "b", scope: !41, file: !1, line: 2, baseType: !10, size: 32, align: 32, offset: 32)
!46 = !{!47}
!47 = !DILocalVariable(name: "o", arg: 1, scope: !38, file: !1, line: 19, type: !41)
!48 = !DILocation(line: 19, column: 31, scope: !38)
!49 = !DILocation(line: 20, column: 3, scope: !38)
!50 = distinct !DISubprogram(name: "pad_left", scope: !1, file: !1, line: 23, type: !51, isLocal: false, isDefinition: true, scopeLine: 23, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !57)
!51 = !DISubroutineType(types: !52)
!52 = !{!10, !53}
!53 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "PadLeft", file: !1, line: 3, size: 64, align: 32, elements: !54)
!54 = !{!55, !56}
!55 = !DIDerivedType(tag: DW_TAG_member, name: "a", scope: !53, file: !1, line: 3, baseType: !10, size: 32, align: 32)
!56 = !DIDerivedType(tag: DW_TAG_member, name: "b", scope: !53, file: !1, line: 3, baseType: !44, size: 32, align: 32, offset: 32)
!57 = !{!58}
!58 = !DILocalVariable(name: "o", arg: 1, scope: !50, file: !1, line: 23, type: !53)
!59 = !DILocation(line: 23, column: 29, scope: !50)
!60 = !DILocation(line: 24, column: 3, scope: !50)
!61 = distinct !DISubprogram(name: "nested", scope: !1, file: !1, line: 27, type: !62, isLocal: false, isDefinition: true, scopeLine: 27, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !70)
!62 = !DISubroutineType(types: !63)
!63 = !{!10, !64}
!64 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "Nested", file: !1, line: 4, size: 128, align: 32, elements: !65)
!65 = !{!66}
!66 = !DIDerivedType(tag: DW_TAG_member, name: "a", scope: !64, file: !1, line: 4, baseType: !67, size: 128, align: 32)
!67 = !DICompositeType(tag: DW_TAG_array_type, baseType: !53, size: 128, align: 32, elements: !68)
!68 = !{!69}
!69 = !DISubrange(count: 2)
!70 = !{!71, !72}
!71 = !DILocalVariable(name: "o", arg: 1, scope: !61, file: !1, line: 27, type: !64)
!72 = !DILocalVariable(name: "p", scope: !61, file: !1, line: 28, type: !53)
!73 = !DIExpression(DW_OP_deref)
!74 = !DILocation(line: 27, column: 26, scope: !61)
!75 = !DILocation(line: 28, column: 18, scope: !61)
!76 = !DILocation(line: 28, column: 22, scope: !61)
!77 = !DILocation(line: 29, column: 3, scope: !61)
!78 = distinct !DISubprogram(name: "bitpiece_spill", scope: !1, file: !1, line: 32, type: !8, isLocal: false, isDefinition: true, scopeLine: 32, isOptimized: true, unit: !0, retainedNodes: !79)
!79 = !{!80}
!80 = !DILocalVariable(name: "o", scope: !78, file: !1, line: 33, type: !13)
!81 = !DILocation(line: 33, column: 18, scope: !78)
!82 = !DILocation(line: 33, column: 26, scope: !78)
!83 = !DILocation(line: 35, column: 3, scope: !78)
!84 = !{i32 603}
!85 = !DILocation(line: 37, column: 3, scope: !78)