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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
69 lines
3.3 KiB
LLVM
69 lines
3.3 KiB
LLVM
;; At the moment we emit an undef as soon as we encounter "dangling" variadic
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;; dbg_value nodes. This does not reduce correctness but does reduce coverage.
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;; We should make variadic dbg_values work in the same way as their
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;; non-variadic counterparts here.
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;; FIXME: When dangling nodes for a variadic dbg_value are found, we should be
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;; able to recover the value in some cases.
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; RUN: llc %s -start-after=codegenprepare -stop-before=finalize-isel -o - | FileCheck %s
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;; Check that dangling debug info in the SelectionDAG build phase is handled
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;; in the same way for variadic dbg_value ndoes as non-variadics.
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;; Generated from the following source with -g -O2. Second dbg.value modified
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;; to be variadic by hand:
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;; void a(char*);
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;; void b() {
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;; char *c = "abc";
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;; char *d = "abc";
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;; a("abc");
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;; }
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; CHECK: ![[C:[0-9]+]] = !DILocalVariable(name: "c",
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; CHECK: ![[D:[0-9]+]] = !DILocalVariable(name: "d",
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; CHECK-DAG: DBG_VALUE %[[VREG:[0-9]]], $noreg, ![[C]], !DIExpression(), debug-location
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; CHECK-DAG: DBG_VALUE_LIST ![[D]], !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_stack_value), $noreg, debug-location
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target triple = "x86_64-unknown-linux-gnu"
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@.str = private unnamed_addr constant [4 x i8] c"abc\00", align 1
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define dso_local void @b() local_unnamed_addr !dbg !7 {
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entry:
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call void @llvm.dbg.value(metadata i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), metadata !11, metadata !DIExpression()), !dbg !15
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call void @llvm.dbg.value(metadata !DIArgList(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0)), metadata !14, metadata !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_stack_value)), !dbg !15
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tail call void @a(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0)) #3, !dbg !16
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ret void, !dbg !17
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}
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declare !dbg !18 dso_local void @a(i8*) local_unnamed_addr
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declare void @llvm.dbg.value(metadata, metadata, metadata)
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!3, !4, !5}
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!llvm.ident = !{!6}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 11.0.0)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, splitDebugInlining: false, nameTableKind: None)
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!1 = !DIFile(filename: "test.c", directory: "/")
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!2 = !{}
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!3 = !{i32 7, !"Dwarf Version", i32 4}
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!4 = !{i32 2, !"Debug Info Version", i32 3}
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!5 = !{i32 1, !"wchar_size", i32 4}
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!6 = !{!"clang version 11.0.0"}
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!7 = distinct !DISubprogram(name: "b", scope: !1, file: !1, line: 2, type: !8, scopeLine: 2, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !10)
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!8 = !DISubroutineType(types: !9)
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!9 = !{null}
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!10 = !{!11, !14}
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!11 = !DILocalVariable(name: "c", scope: !7, file: !1, line: 3, type: !12)
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!12 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !13, size: 64)
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!13 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char)
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!14 = !DILocalVariable(name: "d", scope: !7, file: !1, line: 4, type: !12)
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!15 = !DILocation(line: 0, scope: !7)
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!16 = !DILocation(line: 5, column: 3, scope: !7)
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!17 = !DILocation(line: 6, column: 1, scope: !7)
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!18 = !DISubprogram(name: "a", scope: !1, file: !1, line: 1, type: !19, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !2)
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!19 = !DISubroutineType(types: !20)
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!20 = !{null, !12}
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