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llvm-project/llvm/test/DebugInfo/salvage-duplicate-values.ll

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[NFC] Port all DebugInfo tests to `-passes=` syntax
2022-12-09 00:51:01 +03:00
; RUN: opt %s -passes=dce -S | FileCheck %s
[DebugInfo] Correctly update dbg.values with duplicated location ops This patch fixes code that incorrectly handled dbg.values with duplicate location operands, i.e. !DIArgList(i32 %a, i32 %a). The errors in question were caused by either applying an update to dbg.value multiple times when the update is only valid once, or by updating the DIExpression for only the first instance of a value that appears multiple times. Differential Revision: https://reviews.llvm.org/D105831
2021-07-13 13:31:11 +01:00
; Tests the results of salvaging variadic dbg.values that use the same SSA value
; multiple times.
; CHECK: call void @llvm.dbg.value(metadata !DIArgList(i32 %a, i32 %a),
; CHECK-SAME: ![[VAR_C:[0-9]+]],
; CHECK-SAME: !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_plus_uconst, 5, DW_OP_LLVM_arg, 1, DW_OP_plus_uconst, 5, DW_OP_plus, DW_OP_stack_value))
; CHECK: call void @llvm.dbg.value(metadata !DIArgList(i32 %a, i32 %a, i32 %b, i32 %b),
; CHECK-SAME: ![[VAR_C]],
; CHECK-SAME: !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 2, DW_OP_plus, DW_OP_LLVM_arg, 1, DW_OP_LLVM_arg, 3, DW_OP_plus, DW_OP_plus, DW_OP_stack_value))
; CHECK: ![[VAR_C]] = !DILocalVariable(name: "c"
define i32 @"?multiply@@YAHHH@Z"(i32 %a, i32 %b) !dbg !8 {
entry:
%add1 = add nsw i32 %a, 5, !dbg !15
%add2 = add nsw i32 %a, %b, !dbg !15
call void @llvm.dbg.value(metadata !DIArgList(i32 %add1, i32 %add1), metadata !16, metadata !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_plus, DW_OP_stack_value)), !dbg !13
call void @llvm.dbg.value(metadata !DIArgList(i32 %add2, i32 %add2), metadata !16, metadata !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_plus, DW_OP_stack_value)), !dbg !13
%mul = mul nsw i32 %a, %b, !dbg !17
ret i32 %mul, !dbg !17
}
declare void @llvm.dbg.value(metadata, metadata, metadata)
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!3, !4, !5, !6}
!llvm.ident = !{!7}
!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !1, producer: "clang version 11.0.0", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, nameTableKind: None)
!1 = !DIFile(filename: "test.cpp", directory: "/")
!2 = !{}
!3 = !{i32 2, !"CodeView", i32 1}
!4 = !{i32 2, !"Debug Info Version", i32 3}
!5 = !{i32 1, !"wchar_size", i32 2}
!6 = !{i32 7, !"PIC Level", i32 2}
!7 = !{!"clang version 11.0.0"}
!8 = distinct !DISubprogram(name: "multiply", linkageName: "?multiply@@YAHHH@Z", scope: !1, file: !1, line: 1, type: !9, scopeLine: 1, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !2)
!9 = !DISubroutineType(types: !10)
!10 = !{!11, !11, !11}
!11 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
!12 = !DILocalVariable(name: "b", arg: 2, scope: !8, file: !1, line: 1, type: !11)
!13 = !DILocation(line: 0, scope: !8)
!14 = !DILocalVariable(name: "a", arg: 1, scope: !8, file: !1, line: 1, type: !11)
!15 = !DILocation(line: 2, scope: !8)
!16 = !DILocalVariable(name: "c", scope: !8, file: !1, line: 2, type: !11)
!17 = !DILocation(line: 3, scope: !8)
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