792a6f8119
These date back to when the non-intrinsic format of variable locations was still being tested and was behind a compile-time flag, so not all builds / bots would correctly run them. The solution at the time, to get at least some test coverage, was to have tests opt-in to non-intrinsic debug-info if it was built into LLVM. Nowadays, non-intrinsic format is the default and has been on for more than a year, there's no need for this flag to exist. (I've downgraded the flag from "try" to explicitly requesting non-intrinsic format in some places, so that we can deal with tests that are explicitly about non-intrinsic format in their own commit).
64 lines
3.2 KiB
LLVM
64 lines
3.2 KiB
LLVM
; RUN: opt -passes=mem2reg -S %s -o - \
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; RUN: | FileCheck %s --implicit-check-not="call void @llvm.dbg"
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;; Test assignment tracking debug info when mem2reg promotes a single-store
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;; alloca. Additionally, check that all the dbg.assigns linked to the alloca
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;; are cleaned up, including duplciates.
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; CHECK: entry:
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; CHECK-NEXT: #dbg_value(i32 %a, ![[B:[0-9]+]]
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; CHECK-NEXT: #dbg_value(i32 %a, ![[A:[0-9]+]]
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; CHECK-NEXT: ret
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; CHECK-DAG: ![[A]] = !DILocalVariable(name: "a",
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; CHECK-DAG: ![[B]] = !DILocalVariable(name: "b",
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;; 1. using source:
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;; $ cat test.cpp
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;; int f(int a) { return a; }
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;; 2. manually duplicating the dbg.assign lnked to a's alloca to ensure
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;; duplicates are still cleaned up,
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;; 3. and with a dbg.assign for another variable ("b") attached to a's alloca
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;; to check that a dbg.value is generated for the variable to represent the
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;; store despite the store not having a dbg.assign linked for it.
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; Function Attrs: mustprogress nounwind uwtable
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define dso_local noundef i32 @_Z1fi(i32 noundef %a) #0 !dbg !7 {
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entry:
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%a.addr = alloca i32, align 4, !DIAssignID !13
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call void @llvm.dbg.assign(metadata i1 undef, metadata !12, metadata !DIExpression(), metadata !13, metadata ptr %a.addr, metadata !DIExpression()), !dbg !14
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call void @llvm.dbg.assign(metadata i1 undef, metadata !12, metadata !DIExpression(), metadata !13, metadata ptr %a.addr, metadata !DIExpression()), !dbg !14
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call void @llvm.dbg.assign(metadata i1 undef, metadata !22, metadata !DIExpression(), metadata !13, metadata ptr %a.addr, metadata !DIExpression()), !dbg !14
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store i32 %a, ptr %a.addr, align 4, !DIAssignID !19
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call void @llvm.dbg.assign(metadata i32 %a, metadata !12, metadata !DIExpression(), metadata !19, metadata ptr %a.addr, metadata !DIExpression()), !dbg !14
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%0 = load i32, ptr %a.addr, align 4, !dbg !20
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ret i32 %0, !dbg !21
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}
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declare void @llvm.dbg.assign(metadata, metadata, metadata, metadata, metadata, metadata)
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!2, !3, !4, !5, !1000}
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!llvm.ident = !{!6}
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!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !1, producer: "clang version 14.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, splitDebugInlining: false, nameTableKind: None)
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!1 = !DIFile(filename: "test.cpp", directory: "/")
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!2 = !{i32 7, !"Dwarf Version", i32 5}
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!3 = !{i32 2, !"Debug Info Version", i32 3}
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!4 = !{i32 1, !"wchar_size", i32 4}
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!5 = !{i32 7, !"uwtable", i32 1}
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!6 = !{!"clang version 14.0.0)"}
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!7 = distinct !DISubprogram(name: "f", linkageName: "_Z1fi", scope: !1, file: !1, line: 1, type: !8, scopeLine: 1, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !11)
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!8 = !DISubroutineType(types: !9)
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!9 = !{!10, !10}
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!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!11 = !{!12}
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!12 = !DILocalVariable(name: "a", arg: 1, scope: !7, file: !1, line: 1, type: !10)
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!13 = distinct !DIAssignID()
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!14 = !DILocation(line: 0, scope: !7)
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!19 = distinct !DIAssignID()
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!20 = !DILocation(line: 1, column: 23, scope: !7)
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!21 = !DILocation(line: 1, column: 16, scope: !7)
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!22 = !DILocalVariable(name: "b", scope: !7, file: !1, line: 1, type: !10)
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!1000 = !{i32 7, !"debug-info-assignment-tracking", i1 true}
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