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77 lines
3.8 KiB
77 lines
3.8 KiB
4 months ago
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; RUN: opt -instcombine -S %s -o - | FileCheck %s
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; In pr40648 one of two dbg.values used to describe the variable bumble was
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; being dropped by instcombine. Test that both dbg.values survive instcombine.
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; $ clang -O0 -Xclang -disable-O0-optnone -g bees.c -emit-llvm -S -o - \
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; | opt -opt-bisect-limit=10 -O2 -o -
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; $ cat bees.c
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; struct bees {
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; int a;
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; int b;
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; }
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; int global = 0;
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; struct bees foo(struct bees bumble)
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; {
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; global = 1;
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; int temp = bumble.a + bumble.b;
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; return bumble;
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; }
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; CHECK: define dso_local i64 @foo
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; CHECK: @llvm.dbg.value(metadata i64 {{.*}}, metadata ![[BEE:[0-9]+]], metadata !DIExpression(DW_OP_LLVM_fragment, 0, 32)),
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; CHECK: @llvm.dbg.value(metadata i64 {{.*}}, metadata ![[BEE]], metadata !DIExpression({{.*}}, DW_OP_LLVM_fragment, 32, 32)),
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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-unknown"
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@global = dso_local local_unnamed_addr global i32 0, align 4, !dbg !0
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define dso_local i64 @foo(i64 %bumble.coerce) local_unnamed_addr !dbg !11 {
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entry:
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%bumble.sroa.0.0.extract.trunc = trunc i64 %bumble.coerce to i32
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call void @llvm.dbg.value(metadata i32 %bumble.sroa.0.0.extract.trunc, metadata !18, metadata !DIExpression(DW_OP_LLVM_fragment, 0, 32)), !dbg !19
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%bumble.sroa.3.0.extract.shift = lshr i64 %bumble.coerce, 32
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%bumble.sroa.3.0.extract.trunc = trunc i64 %bumble.sroa.3.0.extract.shift to i32
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call void @llvm.dbg.value(metadata i32 %bumble.sroa.3.0.extract.trunc, metadata !18, metadata !DIExpression(DW_OP_LLVM_fragment, 32, 32)), !dbg !19
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store i32 1, i32* @global, align 4, !dbg !20
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call void @llvm.dbg.value(metadata i32 undef, metadata !21, metadata !DIExpression()), !dbg !19
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%retval.sroa.2.0.insert.ext = zext i32 %bumble.sroa.3.0.extract.trunc to i64, !dbg !22
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%retval.sroa.2.0.insert.shift = shl i64 %retval.sroa.2.0.insert.ext, 32, !dbg !22
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%retval.sroa.0.0.insert.ext = zext i32 %bumble.sroa.0.0.extract.trunc to i64, !dbg !22
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%retval.sroa.0.0.insert.insert = or i64 %retval.sroa.2.0.insert.shift, %retval.sroa.0.0.insert.ext, !dbg !22
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ret i64 %retval.sroa.0.0.insert.insert, !dbg !22
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}
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declare void @llvm.dbg.value(metadata, metadata, metadata)
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!llvm.dbg.cu = !{!2}
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!llvm.module.flags = !{!7, !8, !9}
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!llvm.ident = !{!10}
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!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
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!1 = distinct !DIGlobalVariable(name: "global", scope: !2, file: !3, line: 6, type: !6, isLocal: false, isDefinition: true)
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!2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang version 10.0.0", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5, nameTableKind: None)
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!3 = !DIFile(filename: "bees.c", directory: "/")
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!4 = !{}
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!5 = !{!0}
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!6 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!7 = !{i32 2, !"Dwarf Version", i32 4}
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!8 = !{i32 2, !"Debug Info Version", i32 3}
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!9 = !{i32 1, !"wchar_size", i32 4}
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!10 = !{!"clang version 10.0.0"}
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!11 = distinct !DISubprogram(name: "foo", scope: !3, file: !3, line: 8, type: !12, scopeLine: 9, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !2, retainedNodes: !4)
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!12 = !DISubroutineType(types: !13)
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!13 = !{!14, !14}
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!14 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "bees", file: !3, line: 1, size: 64, elements: !15)
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!15 = !{!16, !17}
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!16 = !DIDerivedType(tag: DW_TAG_member, name: "a", scope: !14, file: !3, line: 2, baseType: !6, size: 32)
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!17 = !DIDerivedType(tag: DW_TAG_member, name: "b", scope: !14, file: !3, line: 3, baseType: !6, size: 32, offset: 32)
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!18 = !DILocalVariable(name: "bumble", arg: 1, scope: !11, file: !3, line: 8, type: !14)
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!19 = !DILocation(line: 0, scope: !11)
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!20 = !DILocation(line: 10, column: 10, scope: !11)
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!21 = !DILocalVariable(name: "temp", scope: !11, file: !3, line: 11, type: !6)
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!22 = !DILocation(line: 12, column: 3, scope: !11)
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