# RUN: llc -global-isel=1 -O0 -run-pass=aarch64-O0-prelegalizer-combiner %s -o - -verify-machineinstrs | FileCheck %s --check-prefix=CHECK
--- |
; ModuleID = 'salvage-debug-info-dead.mir'
target datalayout = "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128"
target triple = "aarch64--"
@A = global i8 1234
declare external i128 @foo()
define void @main() !dbg !6 {
ret void
}
!llvm.dbg.cu = !{!2}
!llvm.module.flags = !{!10, !11, !12}
!llvm.ident = !{!20}
!1 = distinct !DIGlobalVariable(name: "A", scope: !2, file: !3, line: 1, type: !7, isLocal: false, isDefinition: true)
!2 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !3, producer: "clang", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, splitDebugInlining: false, nameTableKind: None)
!3 = !DIFile(filename: "test.ll", directory: "/")
!7 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
!8 = !DISubroutineType(types: !23)
!9 = distinct !DIGlobalVariable(name: "C", scope: !2, file: !3, line: 3, type: !7, isLocal: false, isDefinition: true)
!10 = !{i32 7, !"Dwarf Version", i32 4}
!11 = !{i32 2, !"Debug Info Version", i32 3}
!12 = !{i32 1, !"wchar_size", i32 4}
!20 = !{!"clang"}
!6 = distinct !DISubprogram(name: "main", scope: !3, file: !3, line: 5, type: !8, scopeLine: 5, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !2, retainedNodes: !24)
!23 = !{!7}
!24 = !{}
!25 = !DILocalVariable(name: "X", scope: !6, file: !3, line: 6, type: !7)
!42 = !DILocalVariable(name: "Y", scope: !6, file: !3, line: 12, type: !7)
!52 = !DILocalVariable(name: "Z", scope: !6, file: !3, line: 16, type: !7)
!56 = !DILocalVariable(name: "W", scope: !6, file: !3, line: 18, type: !7)
!57 = !DILocalVariable(name: "P", scope: !6, file: !3, line: 18, type: !7)
...
---
# Check that we salvage debug information for instructions
# deleted as dead in Combiner pass
name: main
tracksRegLiveness: true
body: |
; CHECK-LABEL: name: main
; CHECK: bb.0:
; CHECK: liveins: $x0
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: DBG_VALUE $x0, $noreg, {{.*}}, !DIExpression(DW_OP_LLVM_convert, 64, DW_ATE_unsigned, DW_OP_LLVM_convert, 32, DW_ATE_unsigned, DW_OP_stack_value), debug-location !DILocation(line: 6, column: 7, scope: !6)
; CHECK-NEXT: DBG_VALUE $x0, $noreg, {{.*}}, !DIExpression(DW_OP_LLVM_convert, 64, DW_ATE_unsigned, DW_OP_LLVM_convert, 32, DW_ATE_unsigned, DW_OP_LLVM_convert, 32, DW_ATE_unsigned, DW_OP_LLVM_convert, 16, DW_ATE_unsigned, DW_OP_stack_value), debug-location !DILocation(line: 7, column: 7, scope: !6)
; CHECK-NEXT: DBG_VALUE $x0, $noreg, {{.*}}, !DIExpression(DW_OP_LLVM_convert, 64, DW_ATE_unsigned, DW_OP_LLVM_convert, 32, DW_ATE_unsigned, DW_OP_LLVM_convert, 32, DW_ATE_unsigned, DW_OP_LLVM_convert, 16, DW_ATE_unsigned, DW_OP_LLVM_convert, 16, DW_ATE_unsigned, DW_OP_LLVM_convert, 8, DW_ATE_unsigned, DW_OP_stack_value), debug-location !DILocation(line: 8, column: 7, scope: !6)
; CHECK: bb.1:
; CHECK-NEXT: DBG_VALUE $x0, $noreg, {{.*}}, !DIExpression(DW_OP_LLVM_convert, 64, DW_ATE_unsigned, DW_OP_LLVM_convert, 32, DW_ATE_unsigned, DW_OP_stack_value), debug-location !DILocation(line: 9, column: 7, scope: !6)
; CHECK-NEXT: DBG_VALUE %4:_(s32), 0, {{.*}}, !DIExpression(), debug-location !DILocation(line: 9, column: 7, scope: !6)
bb.0:
liveins: $x0
%0:_(s64) = COPY $x0
%1:_(s32) = G_TRUNC %0:_(s64)
DBG_VALUE %1:_(s32), $noreg, !25, !DIExpression(), debug-location !DILocation(line: 6, column: 7, scope: !6)
%2:_(s16) = G_TRUNC %1:_(s32)
DBG_VALUE %2:_(s16), $noreg, !42, !DIExpression(), debug-location !DILocation(line: 7, column: 7, scope: !6)
%3:_(s8) = G_TRUNC %2:_(s16)
DBG_VALUE %3:_(s8), $noreg, !52, !DIExpression(), debug-location !DILocation(line: 8, column: 7, scope: !6)
bb.1:
%4:_(s32) = G_TRUNC %0:_(s64)
DBG_VALUE %4:_(s32), $noreg, !56, !DIExpression(), debug-location !DILocation(line: 9, column: 7, scope: !6)
DBG_VALUE %4:_(s32), 0, !57, !DIExpression(), debug-location !DILocation(line: 9, column: 7, scope: !6)
...
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