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c2c05d8f17
This patch adds a set of lit tests for ISel support of DIArgList/DBG_VALUE_LIST. Differential Revision: https://reviews.llvm.org/D88593
73 lines
3.4 KiB
LLVM
73 lines
3.4 KiB
LLVM
; RUN: llc %s -start-after=codegenprepare -stop-before=finalize-isel -o - | FileCheck %s
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;; Generated from clang -O2 -emit-llvm -S -g reduce.c -o -
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;; $ cat reduce.c
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;; struct {
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;; int a;
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;; } * b;
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;; int c;
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;; void d() {
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;; int *e = &b->a - 1; // XXX
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;; c = *e;
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;; }
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;;
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;; The line marked XXX becomes a load and gep in IR. We have a variadic
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;; dbg.value using the gep, but we lose that gep in SelectionDAG. Ensure that
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;; we salvage the value.
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; CHECK: [[E_REG:%[0-9]+]]{{.+}} = MOV{{.+}} @b
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; CHECK: DBG_VALUE_LIST {{.*}}, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_constu, 4, DW_OP_minus, DW_OP_stack_value), [[E_REG]], debug-location
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target triple = "x86_64-unknown-linux-gnu"
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%struct.anon = type { i32 }
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@b = dso_local local_unnamed_addr global %struct.anon* null, align 8, !dbg !0
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@c = dso_local local_unnamed_addr global i32 0, align 4, !dbg !6
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define dso_local void @d() local_unnamed_addr !dbg !17 {
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entry:
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%0 = load %struct.anon*, %struct.anon** @b, align 8, !dbg !23
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%add.ptr = getelementptr inbounds %struct.anon, %struct.anon* %0, i64 -1, i32 0, !dbg !28
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call void @llvm.dbg.value(metadata !DIArgList(i32* %add.ptr), metadata !21, metadata !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_stack_value)), !dbg !29
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%1 = load i32, i32* %add.ptr, align 4, !dbg !30
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store i32 %1, i32* @c, align 4, !dbg !33
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ret void, !dbg !34
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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 = !{!13, !14, !15}
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!llvm.ident = !{!16}
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!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
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!1 = distinct !DIGlobalVariable(name: "b", scope: !2, file: !3, line: 3, type: !9, isLocal: false, isDefinition: true)
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!2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang version 11.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5, splitDebugInlining: false, nameTableKind: None)
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!3 = !DIFile(filename: "reduce.c", directory: "/")
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!4 = !{}
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!5 = !{!0, !6}
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!6 = !DIGlobalVariableExpression(var: !7, expr: !DIExpression())
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!7 = distinct !DIGlobalVariable(name: "c", scope: !2, file: !3, line: 4, type: !8, isLocal: false, isDefinition: true)
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!8 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!9 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !10, size: 64)
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!10 = distinct !DICompositeType(tag: DW_TAG_structure_type, file: !3, line: 1, size: 32, elements: !11)
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!11 = !{!12}
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!12 = !DIDerivedType(tag: DW_TAG_member, name: "a", scope: !10, file: !3, line: 2, baseType: !8, size: 32)
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!13 = !{i32 7, !"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 = !{!"clang version 11.0.0"}
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!17 = distinct !DISubprogram(name: "d", scope: !3, file: !3, line: 5, type: !18, scopeLine: 5, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !2, retainedNodes: !20)
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!18 = !DISubroutineType(types: !19)
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!19 = !{null}
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!20 = !{!21}
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!21 = !DILocalVariable(name: "e", scope: !17, file: !3, line: 6, type: !22)
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!22 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !8, size: 64)
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!23 = !DILocation(line: 6, column: 13, scope: !17)
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!28 = !DILocation(line: 6, column: 18, scope: !17)
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!29 = !DILocation(line: 0, scope: !17)
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!30 = !DILocation(line: 7, column: 7, scope: !17)
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!33 = !DILocation(line: 7, column: 5, scope: !17)
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!34 = !DILocation(line: 8, column: 1, scope: !17)
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