c383f4d655
Prior to this patch, variadic DIExpressions (i.e. ones that contain DW_OP_LLVM_arg) could only be created by salvaging debug values to create stack value expressions, resulting in a DBG_VALUE_LIST being created. As of the previous patch in this patch stack, DBG_INSTR_REF's syntax has been changed to match DBG_VALUE_LIST in preparation for supporting variadic expressions. This patch adds some minor changes needed to allow variadic expressions that aren't stack values to exist, and allows variadic expressions that are trivially reduceable to non-variadic expressions to be handled similarly to non-variadic expressions. Reviewed by: jmorse Differential Revision: https://reviews.llvm.org/D133926
112 lines
6.0 KiB
LLVM
112 lines
6.0 KiB
LLVM
; RUN: llc %s -stop-before=finalize-isel -o - \
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; RUN: -experimental-debug-variable-locations=true \
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; RUN: | FileCheck %s
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;; Copy of DebugInfo/COFF/types-array-advanced.ll. This features a dbg.declare
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;; of something (dynamic alloca) that isn't an argument, causing a SDDbgValue
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;; with the indirect flag set to be emitted. Test that it's preserved in
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;; instruction referencing mode -- we don't have an IsIndirect flag on
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;; DBG_INSTR_REF, so it gets encoded as an additional DW_OP_deref.
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;;
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;; NB: the original test has an additional spurious DW_OP_deref in the
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;; dbg.declare's arguments, which is preserved here, translating to two derefs.
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; CHECK: DBG_INSTR_REF !{{[0-9]+}}, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_deref, DW_OP_deref), dbg-instr-ref(1, 2)
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source_filename = "test/DebugInfo/COFF/types-array-advanced.ll"
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target datalayout = "e-m:x-p:32:32-i64:64-f80:32-n8:16:32-a:0:32-S32"
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target triple = "i686-pc-windows-msvc18.0.31101"
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%struct.incomplete_struct = type { i32 }
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@"\01?multi_dim_arr@@3PAY146DA" = global [2 x [5 x [7 x i8]]] zeroinitializer, align 1, !dbg !0
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@"\01?p_incomplete_struct_arr@@3PAY02Uincomplete_struct@@A" = global ptr null, align 4, !dbg !6
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@"\01?incomplete_struct_arr@@3PAUincomplete_struct@@A" = global [3 x %struct.incomplete_struct] zeroinitializer, align 4, !dbg !16
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@"\01?typedef_arr@@3SDHD" = constant [4 x i32] zeroinitializer, align 4, !dbg !18
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; Function Attrs: nounwind
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define void @"\01?foo@@YAXH@Z"(i32 %x) #0 !dbg !35 {
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entry:
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%x.addr = alloca i32, align 4
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%saved_stack = alloca ptr, align 4
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store i32 %x, ptr %x.addr, align 4
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%0 = load i32, ptr %x.addr, align 4, !dbg !41
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%1 = call ptr @llvm.stacksave(), !dbg !42
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store ptr %1, ptr %saved_stack, align 4, !dbg !42
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%vla = alloca i32, i32 %0, align 4, !dbg !42
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;; This dbg.declare turns into a DBG_INSTR_REF, rather than an argument
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;; DBG_VALUE. It needs to keep the extra indirectness.
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call void @llvm.dbg.declare(metadata ptr %vla, metadata !43, metadata !47), !dbg !48
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store i32 0, ptr %vla, align 4, !dbg !50
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%2 = load ptr, ptr %saved_stack, align 4, !dbg !51
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call void @llvm.stackrestore(ptr %2), !dbg !51
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ret void, !dbg !51
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}
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; Function Attrs: nounwind readnone
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declare void @llvm.dbg.declare(metadata, metadata, metadata)
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; Function Attrs: nounwind
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declare ptr @llvm.stacksave()
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; Function Attrs: nounwind
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declare void @llvm.stackrestore(ptr)
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!llvm.dbg.cu = !{!2}
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!llvm.module.flags = !{!32, !33}
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!llvm.ident = !{!34}
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!0 = distinct !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
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!1 = !DIGlobalVariable(name: "multi_dim_arr", linkageName: "\01?multi_dim_arr@@3PAY146DA", scope: !2, file: !3, line: 1, type: !26, isLocal: false, isDefinition: true)
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!2 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !3, producer: "clang version 3.9.0 (trunk 273874)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5)
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!3 = !DIFile(filename: "t.cpp", directory: "/")
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!4 = !{}
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!5 = !{!0, !6, !16, !18}
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!6 = distinct !DIGlobalVariableExpression(var: !7, expr: !DIExpression())
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!7 = !DIGlobalVariable(name: "p_incomplete_struct_arr", linkageName: "\01?p_incomplete_struct_arr@@3PAY02Uincomplete_struct@@A", scope: !2, file: !3, line: 3, type: !8, isLocal: false, isDefinition: true)
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!8 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !9, size: 32, align: 32)
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!9 = !DICompositeType(tag: DW_TAG_array_type, baseType: !10, elements: !14)
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!10 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "incomplete_struct", file: !3, line: 4, size: 32, align: 32, elements: !11, identifier: ".?AUincomplete_struct@@")
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!11 = !{!12}
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!12 = !DIDerivedType(tag: DW_TAG_member, name: "s1", scope: !10, file: !3, line: 5, baseType: !13, size: 32, align: 32)
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!13 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
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!14 = !{!15}
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!15 = !DISubrange(count: 3)
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!16 = distinct !DIGlobalVariableExpression(var: !17, expr: !DIExpression())
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!17 = !DIGlobalVariable(name: "incomplete_struct_arr", linkageName: "\01?incomplete_struct_arr@@3PAUincomplete_struct@@A", scope: !2, file: !3, line: 6, type: !9, isLocal: false, isDefinition: true)
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!18 = distinct !DIGlobalVariableExpression(var: !19, expr: !DIExpression())
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!19 = !DIGlobalVariable(name: "typedef_arr", linkageName: "\01?typedef_arr@@3SDHD", scope: !2, file: !3, line: 14, type: !20, isLocal: false, isDefinition: true)
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!20 = !DICompositeType(tag: DW_TAG_array_type, baseType: !21, size: 128, align: 32, elements: !24)
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!21 = !DIDerivedType(tag: DW_TAG_typedef, name: "T_INT", file: !3, line: 13, baseType: !22)
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!22 = !DIDerivedType(tag: DW_TAG_const_type, baseType: !23)
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!23 = !DIDerivedType(tag: DW_TAG_volatile_type, baseType: !13)
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!24 = !{!25}
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!25 = !DISubrange(count: 4)
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!26 = !DICompositeType(tag: DW_TAG_array_type, baseType: !27, size: 560, align: 8, elements: !28)
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!27 = !DIBasicType(name: "char", size: 8, align: 8, encoding: DW_ATE_signed_char)
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!28 = !{!29, !30, !31}
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!29 = !DISubrange(count: 2)
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!30 = !DISubrange(count: 5)
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!31 = !DISubrange(count: 7)
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!32 = !{i32 2, !"CodeView", i32 1}
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!33 = !{i32 2, !"Debug Info Version", i32 3}
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!34 = !{!"clang version 3.9.0 (trunk 273874)"}
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!35 = distinct !DISubprogram(name: "foo", linkageName: "\01?foo@@YAXH@Z", scope: !3, file: !3, line: 8, type: !36, isLocal: false, isDefinition: true, scopeLine: 8, flags: DIFlagPrototyped, isOptimized: false, unit: !2, retainedNodes: !4)
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!36 = !DISubroutineType(types: !37)
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!37 = !{null, !13}
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!38 = !DILocalVariable(name: "x", arg: 1, scope: !35, file: !3, line: 8, type: !13)
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!39 = !DIExpression()
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!40 = !DILocation(line: 8, column: 14, scope: !35)
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!41 = !DILocation(line: 9, column: 21, scope: !35)
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!42 = !DILocation(line: 9, column: 4, scope: !35)
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!43 = !DILocalVariable(name: "dyn_size_arr", scope: !35, file: !3, line: 9, type: !44)
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!44 = !DICompositeType(tag: DW_TAG_array_type, baseType: !13, align: 32, elements: !45)
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!45 = !{!46}
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!46 = !DISubrange(count: -1)
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!47 = !DIExpression(DW_OP_deref)
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!48 = !DILocation(line: 9, column: 8, scope: !35)
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!49 = !DILocation(line: 10, column: 4, scope: !35)
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!50 = !DILocation(line: 10, column: 20, scope: !35)
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!51 = !DILocation(line: 11, column: 1, scope: !35)
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