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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -S -passes=redundant-dbg-inst-elim | FileCheck %s
; All dbg.value with location "!dbg !19" are redundant in the input.
; FIXME: We do not handle non-overlapping/overlapping fragments perfectly yet.
define dso_local i16 @main(i16 %a1, i16 %a2) local_unnamed_addr !dbg !7 {
; CHECK-LABEL: @main(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[BB0:%.*]]
; CHECK: bb0:
; CHECK-NEXT: #dbg_value(i16 13, [[META13:![0-9]+]], !DIExpression(), [[META16:![0-9]+]])
; CHECK-NEXT: #dbg_value(i16 14, [[META14:![0-9]+]], !DIExpression(), [[META18:![0-9]+]])
; CHECK-NEXT: #dbg_value(i16 13, [[META13]], !DIExpression(), [[META18]])
; CHECK-NEXT: #dbg_value(i16 12, [[META12:![0-9]+]], !DIExpression(), [[META18]])
; CHECK-NEXT: br label [[BB1:%.*]]
; CHECK: bb1:
; CHECK-NEXT: #dbg_value(i16 [[A1:%.*]], [[META14]], !DIExpression(), [[META18]])
; CHECK-NEXT: #dbg_value(i16 888, [[META13]], !DIExpression(), [[META18]])
; CHECK-NEXT: #dbg_value(i16 [[A2:%.*]], [[META12]], !DIExpression(), [[META18]])
; CHECK-NEXT: [[T1:%.*]] = call i16 @bar(i16 0)
; CHECK-NEXT: #dbg_value(i16 [[T1]], [[META13]], !DIExpression(), [[META18]])
; CHECK-NEXT: #dbg_value(i16 [[A2]], [[META12]], !DIExpression(DW_OP_constu, 2, DW_OP_shr, DW_OP_stack_value), [[META18]])
; CHECK-NEXT: br label [[BB2:%.*]]
; CHECK: bb2:
; CHECK-NEXT: #dbg_declare(i16 %a1, !19, !DIExpression(), [[META18]])
; CHECK-NEXT: #dbg_label([[META21:![0-9]+]], [[META18]])
; CHECK-NEXT: #dbg_value(i16 [[A1]], [[META13]], !DIExpression(DW_OP_LLVM_fragment, 0, 8), [[META18]])
; CHECK-NEXT: #dbg_value(i16 [[A1]], [[META13]], !DIExpression(DW_OP_LLVM_fragment, 8, 8), [[META18]])
; CHECK-NEXT: [[T2:%.*]] = call i16 @bar(i16 [[T1]])
; CHECK-NEXT: #dbg_value(i16 [[T2]], [[META13]], !DIExpression(DW_OP_LLVM_fragment, 0, 8), [[META18]])
; CHECK-NEXT: #dbg_value(i16 [[A1]], [[META13]], !DIExpression(DW_OP_LLVM_fragment, 8, 8), [[META19:![0-9]+]])
; CHECK-NEXT: br label [[BB3:%.*]]
; CHECK: bb3:
; CHECK-NEXT: #dbg_value(i16 [[A1]], [[META13]], !DIExpression(DW_OP_LLVM_fragment, 0, 8), [[META19]])
; CHECK-NEXT: #dbg_value(i16 [[A1]], [[META13]], !DIExpression(), [[META18]])
; CHECK-NEXT: br label [[EXIT:%.*]]
; CHECK: exit:
; CHECK-NEXT: ret i16 [[T2]]
;
entry:
br label %bb0
bb0:
#dbg_value(i16 999, !12, !DIExpression(), !19)
#dbg_value(i16 996, !13, !DIExpression(), !19)
#dbg_value(i16 13, !13, !DIExpression(), !17)
#dbg_value(i16 998, !12, !DIExpression(DW_OP_constu, 2, DW_OP_shr, DW_OP_stack_value), !19)
#dbg_value(i16 14, !14, !DIExpression(), !16)
#dbg_value(i16 997, !12, !DIExpression(), !19)
#dbg_value(i16 13, !13, !DIExpression(), !16)
#dbg_value(i16 12, !12, !DIExpression(), !16)
br label %bb1
bb1:
#dbg_value(i16 %a1, !14, !DIExpression(), !16)
#dbg_value(i16 888, !13, !DIExpression(), !16)
#dbg_value(i16 %a2, !12, !DIExpression(), !16)
%t1 = call i16 @bar(i16 0)
#dbg_value(i16 %a1, !14, !DIExpression(), !19)
#dbg_value(i16 %t1, !13, !DIExpression(), !16)
#dbg_value(i16 %a2, !12, !DIExpression(DW_OP_constu, 2, DW_OP_shr, DW_OP_stack_value), !16)
br label %bb2
bb2:
#dbg_value(i16 %a1, !13, !DIExpression(DW_OP_LLVM_fragment, 0, 8), !19)
#dbg_value(i16 %a1, !13, !DIExpression(DW_OP_LLVM_fragment, 8, 8), !19)
; Check dbg_declare and dbg_label don't interfere with the backward scan.
#dbg_declare(i16 %a1, !21, !DIExpression(), !16)
#dbg_label(!20, !16)
#dbg_value(i16 %a1, !13, !DIExpression(DW_OP_LLVM_fragment, 0, 8), !16)
#dbg_value(i16 %a1, !13, !DIExpression(DW_OP_LLVM_fragment, 8, 8), !16)
%t2 = call i16 @bar(i16 %t1)
#dbg_value(i16 %t2, !13, !DIExpression(DW_OP_LLVM_fragment, 0, 8), !16)
#dbg_value(i16 %a1, !13, !DIExpression(DW_OP_LLVM_fragment, 8, 8), !19)
br label %bb3
bb3:
#dbg_value(i16 %a1, !13, !DIExpression(DW_OP_LLVM_fragment, 0, 8), !19)
#dbg_value(i16 %a1, !13, !DIExpression(), !16)
br label %exit
exit:
ret i16 %t2
}
declare i16 @bar(i16)
!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 10.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, globals: !2, nameTableKind: None)
!1 = !DIFile(filename: "foo.c", directory: "")
!2 = !{}
!3 = !{i32 7, !"Dwarf Version", i32 4}
!4 = !{i32 2, !"Debug Info Version", i32 3}
!5 = !{i32 1, !"wchar_size", i32 1}
!6 = !{!"clang version 10.0.0"}
!7 = distinct !DISubprogram(name: "main", scope: !1, file: !1, line: 8, type: !8, scopeLine: 8, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !11)
!8 = !DISubroutineType(types: !9)
!9 = !{!10}
!10 = !DIBasicType(name: "int", size: 16, encoding: DW_ATE_signed)
!11 = !{!12, !13, !14}
!12 = !DILocalVariable(name: "x", scope: !7, file: !1, line: 9, type: !10)
!13 = !DILocalVariable(name: "y", scope: !7, file: !1, line: 10, type: !10)
!14 = !DILocalVariable(name: "u", scope: !15, file: !1, line: 11, type: !10)
!15 = distinct !DILexicalBlock(scope: !7, file: !1, line: 11, column: 3)
!16 = !DILocation(line: 0, scope: !7)
!17 = !DILocation(line: 0, scope: !7, inlinedAt: !18)
!18 = !DILocation(line: 1, scope: !7)
!19 = !DILocation(line: 77, scope: !7)
!20 = !DILabel(scope: !7, name: "label", file: !1, line: 3)
!21 = !DILocalVariable(name: "z", scope: !7, file: !1, line: 10, type: !10)
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