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llvm/test/DebugInfo/COFF/pieces.ll
Adrian Prantl 460dd60c1a [DIExpression] Introduce a dedicated DW_OP_LLVM_fragment operation 
so we can stop using DW_OP_bit_piece with the wrong semantics.

The entire back story can be found here:
http://lists.llvm.org/pipermail/llvm-commits/Week-of-Mon-20161114/405934.html

The gist is that in LLVM we've been misinterpreting DW_OP_bit_piece's
offset field to mean the offset into the source variable rather than
the offset into the location at the top the DWARF expression stack. In
order to be able to fix this in a subsequent patch, this patch
introduces a dedicated DW_OP_LLVM_fragment operation with the
semantics that we used to apply to DW_OP_bit_piece, which is what we
actually need while inside of LLVM. This patch is complete with a
bitcode upgrade for expressions using the old format. It does not yet
fix the DWARF backend to use DW_OP_bit_piece correctly.

Implementation note: We discussed several options for implementing
this, including reserving a dedicated field in DIExpression for the
fragment size and offset, but using an custom operator at the end of
the expression works just fine and is more efficient because we then
only pay for it when we need it.

Differential Revision: https://reviews.llvm.org/D27361
rdar://problem/29335809

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@288683 91177308-0d34-0410-b5e6-96231b3b80d8
2016-12-05 18:04:47 +00:00

430 lines
20 KiB
LLVM
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; RUN: llc < %s | FileCheck %s --check-prefix=ASM
; RUN: llc < %s -filetype=obj | 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 [fragment offset=0 size=32] <- 0
; ASM: #DEBUG_VALUE: loop_csr:o [fragment offset=32 size=32] <- 0
; ASM: # BB#2: # %for.body.preheader
; ASM: xorl %edi, %edi
; ASM: xorl %esi, %esi
; ASM: .p2align 4, 0x90
; ASM: .LBB0_3: # %for.body
; ASM: [[ox_start:\.Ltmp[0-9]+]]:
; ASM: #DEBUG_VALUE: loop_csr:o [fragment offset=0 size=32] <- %EDI
; ASM: .cv_loc 0 1 13 11 # t.c:13:11
; ASM: movl %edi, %ecx
; ASM: callq g
; ASM: movl %eax, %edi
; ASM: [[oy_start:\.Ltmp[0-9]+]]:
; ASM: #DEBUG_VALUE: loop_csr:o [fragment offset=0 size=32] <- %EDI
; ASM: #DEBUG_VALUE: loop_csr:o [fragment offset=32 size=32] <- %ESI
; ASM: .cv_loc 0 1 14 11 # t.c:14:11
; ASM: movl %esi, %ecx
; ASM: callq g
; ASM: movl %eax, %esi
; ASM: #DEBUG_VALUE: loop_csr:o [fragment offset=32 size=32] <- %ESI
; ASM: cmpl n(%rip), %eax
; ASM: jl .LBB0_3
; ASM: [[oy_end:\.Ltmp[0-9]+]]:
; ASM: addl %edi, %esi
; ASM: movl %esi, %eax
; ASM-LABEL: pad_right: # @pad_right
; ASM: #DEBUG_VALUE: pad_right:o [fragment offset=32 size=32] <- %ECX
; ASM: movl %ecx, %eax
; ASM: retq
; ASM-LABEL: pad_left: # @pad_left
; ASM: #DEBUG_VALUE: pad_left:o [fragment offset=0 size=32] <- %ECX
; ASM: .cv_loc 2 1 24 3 # t.c:24:3
; ASM: movl %ecx, %eax
; ASM: retq
; ASM-LABEL: nested: # @nested
; ASM: #DEBUG_VALUE: nested:o <- [%RCX+0]
; ASM: movl 12(%rcx), %eax
; ASM: [[p_start:\.Ltmp[0-9]+]]:
; ASM: #DEBUG_VALUE: nested:p [fragment offset=32 size=32] <- %EAX
; ASM: retq
; ASM-LABEL: bitpiece_spill: # @bitpiece_spill
; ASM: #DEBUG_VALUE: bitpiece_spill:o [fragment offset=0 size=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 [fragment offset=32 size=32] <- [%RSP+[[offset_o_x]]]
; ASM: #APP
; ASM: #NO_APP
; ASM: movl [[offset_o_x]](%rsp), %eax # 4-byte Reload
; ASM: [[spill_o_x_end:\.Ltmp[0-9]+]]:
; ASM: retq
; ASM-LABEL: .short 4423 # Record kind: S_GPROC32_ID
; ASM: .asciz "loop_csr" # Function name
; ASM: .short 4414 # Record kind: S_LOCAL
; ASM: .asciz "o"
; ASM: .cv_def_range [[ox_start]] .Lfunc_end0, "C\021\030\000\000\000\000\000\000\000"
; ASM: .cv_def_range [[oy_start]] [[oy_end]], "C\021\027\000\000\000\004\000\000\000"
; OBJ-LABEL: ProcStart {
; OBJ: Kind: S_GPROC32_ID (0x1147)
; OBJ: DisplayName: loop_csr
; OBJ: }
; OBJ: Local {
; OBJ: VarName: o
; OBJ: }
; OBJ: DefRangeSubfieldRegister {
; OBJ: Register: 24
; OBJ: MayHaveNoName: 0
; OBJ: OffsetInParent: 0
; OBJ: LocalVariableAddrRange {
; OBJ: }
; OBJ: }
; OBJ: DefRangeSubfieldRegister {
; OBJ: Register: 23
; 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_right" # Function name
; ASM: .short 4414 # Record kind: S_LOCAL
; ASM: .asciz "o"
; ASM: .cv_def_range .Lfunc_begin1 .Lfunc_end1, "C\021\022\000\000\000\004\000\000\000"
; OBJ-LABEL: ProcStart {
; OBJ: Kind: S_GPROC32_ID (0x1147)
; OBJ: DisplayName: pad_right
; OBJ: }
; OBJ: Local {
; OBJ: VarName: o
; OBJ: }
; OBJ: DefRangeSubfieldRegister {
; OBJ: Register: 18
; 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 .Lfunc_begin2 .Lfunc_end2, "C\021\022\000\000\000\000\000\000\000"
; OBJ-LABEL: ProcStart {
; OBJ: Kind: S_GPROC32_ID (0x1147)
; OBJ: DisplayName: pad_left
; OBJ: }
; OBJ: Local {
; OBJ: VarName: o
; OBJ: }
; OBJ: DefRangeSubfieldRegister {
; OBJ: Register: 18
; 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: .asciz "o"
; FIXME: We should have a .cv_def_range for 'o', but we don't yet.
; ASM-NOT: .cv_def_range
; ASM: .short 4414 # Record kind: S_LOCAL
; ASM: .asciz "p"
; ASM: .cv_def_range [[p_start]] .Lfunc_end3, "C\021\021\000\000\000\004\000\000\000"
; OBJ-LABEL: ProcStart {
; OBJ: Kind: S_GPROC32_ID (0x1147)
; OBJ: DisplayName: nested
; OBJ: }
; OBJ: Local {
; OBJ: VarName: o
; OBJ: }
; OBJ: Local {
; OBJ: VarName: p
; OBJ: }
; OBJ: DefRangeSubfieldRegister {
; OBJ: Register: 17
; 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 4414 # Record kind: S_LOCAL
; ASM: .asciz "o"
; ASM: .cv_def_range [[spill_o_x_start]] [[spill_o_x_end]], "E\021O\001A\000$\000\000\000"
; OBJ-LABEL: ProcStart {
; OBJ: Kind: S_GPROC32_ID (0x1147)
; OBJ: DisplayName: bitpiece_spill
; OBJ: }
; OBJ: Local {
; OBJ: VarName: o
; OBJ: }
; OBJ: DefRangeRegisterRel {
; OBJ: BaseRegister: 335
; OBJ: HasSpilledUDTMember: Yes
; OBJ: OffsetInParent: 4
; OBJ: BasePointerOffset: 36
; OBJ: LocalVariableAddrRange {
; OBJ: }
; 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 %struct.IntPair* undef, metadata !12, metadata !17), !dbg !18
tail call void @llvm.dbg.value(metadata i32 0, i64 0, metadata !12, metadata !19), !dbg !18
tail call void @llvm.dbg.value(metadata i32 0, i64 0, metadata !12, metadata !20), !dbg !18
tail call void @llvm.dbg.value(metadata i32 0, i64 0, metadata !12, metadata !19), !dbg !18
tail call void @llvm.dbg.value(metadata i32 0, i64 0, metadata !12, metadata !20), !dbg !18
store i32 0, i32* @i, align 4, !dbg !21, !tbaa !24
%0 = load i32, i32* @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, i64 0, metadata !12, metadata !19), !dbg !18
tail call void @llvm.dbg.value(metadata i32 %o.sroa.5.010, i64 0, 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, i64 0, 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, i64 0, metadata !12, metadata !20), !dbg !18
%1 = load i32, i32* @i, align 4, !dbg !21, !tbaa !24
%inc = add nsw i32 %1, 1, !dbg !21
store i32 %inc, i32* @i, align 4, !dbg !21, !tbaa !24
%2 = load i32, i32* @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, i64 0, metadata !47, metadata !20), !dbg !48
tail call void @llvm.dbg.declare(metadata %struct.PadRight* 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, i64 0, metadata !58, metadata !19), !dbg !59
tail call void @llvm.dbg.declare(metadata %struct.PadLeft* 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(%struct.Nested* nocapture readonly %o) local_unnamed_addr #4 !dbg !61 {
entry:
tail call void @llvm.dbg.declare(metadata %struct.Nested* %o, metadata !71, metadata !73), !dbg !74
tail call void @llvm.dbg.declare(metadata %struct.PadLeft* undef, metadata !72, metadata !17), !dbg !75
%p.sroa.3.0..sroa_idx2 = getelementptr inbounds %struct.Nested, %struct.Nested* %o, i64 0, i32 0, i64 1, i32 1, !dbg !76
%p.sroa.3.0.copyload = load i32, i32* %p.sroa.3.0..sroa_idx2, align 4, !dbg !76
tail call void @llvm.dbg.value(metadata i32 %p.sroa.3.0.copyload, i64 0, 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 %struct.IntPair* undef, metadata !80, metadata !17), !dbg !81
tail call void @llvm.dbg.value(metadata i32 0, i64 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, i64 0, 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, i64, metadata, metadata) #1
attributes #0 = { nounwind uwtable "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "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" "unsafe-fp-math"="false" "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" "no-frame-pointer-elim"="false" "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" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #3 = { nounwind readnone uwtable "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "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" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #4 = { nounwind readonly uwtable "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "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" "unsafe-fp-math"="false" "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, variables: !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, variables: !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, variables: !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, variables: !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, variables: !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)
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