4424903156
This patch updates the last few places in LLVM using findDbgValues that don't also collect and handle DPValue objects. This largely involves instcombine and mem2reg changes, and are largely mechanical, calling existing utilities on collections of DPValues instead of just DbgValuesInsts. A variety of tests have had RemoveDIs RUN lines added to them to cover these behaviours. We have some technical debt of the instcombine sinking code for DPValues not being implemented yet, so I've left FIXME stubs indicating that we intend to cover tests with RemoveDIs but haven't yet.
83 lines
4.4 KiB
LLVM
83 lines
4.4 KiB
LLVM
; RUN: opt < %s -passes=instcombine -S | FileCheck %s
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; RUN: opt < %s -passes=instcombine -S --try-experimental-debuginfo-iterators | FileCheck %s
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; Make sure to update the debug value after dead code elimination.
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; CHECK: %call = call signext i8 @b(i32 6), !dbg !39
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; CHECK-NEXT: call void @llvm.dbg.value(metadata i8 %call, metadata !30, metadata !DIExpression(DW_OP_LLVM_convert, 8, DW_ATE_signed, DW_OP_LLVM_convert, 32, DW_ATE_signed, DW_OP_stack_value)), !dbg !38
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@e = common local_unnamed_addr global i8 0, align 1, !dbg !0
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@c = common local_unnamed_addr global i32 0, align 4, !dbg !6
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@d = common local_unnamed_addr global i32 0, align 4, !dbg !10
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define signext i8 @b(i32 %f) local_unnamed_addr #0 !dbg !18 {
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entry:
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call void @llvm.dbg.value(metadata i32 %f, metadata !22, metadata !DIExpression()), !dbg !23
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%conv = trunc i32 %f to i8, !dbg !24
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ret i8 %conv, !dbg !25
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}
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define i32 @main() local_unnamed_addr #0 !dbg !26 {
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entry:
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%0 = load i8, ptr @e, align 1, !dbg !31, !tbaa !32
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%conv = sext i8 %0 to i32, !dbg !31
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store i32 %conv, ptr @c, align 4, !dbg !35, !tbaa !36
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call void @llvm.dbg.value(metadata i32 -1372423381, metadata !30, metadata !DIExpression()), !dbg !38
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%call = call signext i8 @b(i32 6), !dbg !39
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%conv1 = sext i8 %call to i32, !dbg !39
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call void @llvm.dbg.value(metadata i32 %conv1, metadata !30, metadata !DIExpression()), !dbg !38
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%1 = load i32, ptr @d, align 4, !dbg !40, !tbaa !36
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%call2 = call i32 (...) @optimize_me_not(), !dbg !41
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ret i32 0, !dbg !42
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}
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declare i32 @optimize_me_not(...) local_unnamed_addr #1
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declare void @llvm.dbg.value(metadata, metadata, metadata) #2
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!llvm.dbg.cu = !{!2}
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!llvm.module.flags = !{!13, !14, !15, !16}
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!llvm.ident = !{!17}
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!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
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!1 = distinct !DIGlobalVariable(name: "e", scope: !2, file: !3, line: 3, type: !12, isLocal: false, isDefinition: true)
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!2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang version 9.0.0 (https://github.com/llvm/llvm-project b306ef12f046353ea5bda4b3b77759e57909a0db)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5, nameTableKind: GNU)
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!3 = !DIFile(filename: "a.c", directory: "/Users/davide/llvm/build/bin")
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!4 = !{}
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!5 = !{!6, !10, !0}
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!6 = !DIGlobalVariableExpression(var: !7, expr: !DIExpression())
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!7 = distinct !DIGlobalVariable(name: "c", scope: !2, file: !3, line: 2, type: !8, isLocal: false, isDefinition: true)
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!8 = !DIDerivedType(tag: DW_TAG_typedef, name: "a", file: !3, line: 1, baseType: !9)
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!9 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!10 = !DIGlobalVariableExpression(var: !11, expr: !DIExpression())
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!11 = distinct !DIGlobalVariable(name: "d", scope: !2, file: !3, line: 2, type: !8, isLocal: false, isDefinition: true)
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!12 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char)
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!13 = !{i32 2, !"Dwarf Version", i32 4}
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!14 = !{i32 2, !"Debug Info Version", i32 3}
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!15 = !{i32 1, !"wchar_size", i32 4}
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!16 = !{i32 7, !"PIC Level", i32 2}
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!17 = !{!"clang version 9.0.0 (https://github.com/llvm/llvm-project b306ef12f046353ea5bda4b3b77759e57909a0db)"}
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!18 = distinct !DISubprogram(name: "b", scope: !3, file: !3, line: 4, type: !19, scopeLine: 4, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !2, retainedNodes: !21)
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!19 = !DISubroutineType(types: !20)
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!20 = !{!12, !9}
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!21 = !{!22}
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!22 = !DILocalVariable(name: "f", arg: 1, scope: !18, file: !3, line: 4, type: !9)
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!23 = !DILocation(line: 4, column: 9, scope: !18)
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!24 = !DILocation(line: 4, column: 21, scope: !18)
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!25 = !DILocation(line: 4, column: 14, scope: !18)
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!26 = distinct !DISubprogram(name: "main", scope: !3, file: !3, line: 5, type: !27, scopeLine: 5, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !2, retainedNodes: !29)
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!27 = !DISubroutineType(types: !28)
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!28 = !{!9}
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!29 = !{!30}
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!30 = !DILocalVariable(name: "l_1499", scope: !26, file: !3, line: 7, type: !8)
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!31 = !DILocation(line: 6, column: 7, scope: !26)
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!32 = !{!33, !33, i64 0}
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!33 = !{!"omnipotent char", !34, i64 0}
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!34 = !{!"Simple C/C++ TBAA"}
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!35 = !DILocation(line: 6, column: 5, scope: !26)
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!36 = !{!37, !37, i64 0}
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!37 = !{!"int", !33, i64 0}
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!38 = !DILocation(line: 7, column: 5, scope: !26)
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!39 = !DILocation(line: 8, column: 12, scope: !26)
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!40 = !DILocation(line: 9, column: 11, scope: !26)
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!41 = !DILocation(line: 10, column: 3, scope: !26)
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!42 = !DILocation(line: 11, column: 1, scope: !26)
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