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llvm-project/llvm/test/Bitcode/disubrange-v0.ll

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[Metadata] Extend 'count' field of DISubrange to take a metadata node Summary: This patch extends the DISubrange 'count' field to take either a (signed) constant integer value or a reference to a DILocalVariable or DIGlobalVariable. This is patch [1/3] in a series to extend LLVM's DISubrange Metadata node to support debugging of C99 variable length arrays and vectors with runtime length like the Scalable Vector Extension for AArch64. It is also a first step towards representing more complex cases like arrays in Fortran. Reviewers: echristo, pcc, aprantl, dexonsmith, clayborg, kristof.beyls, dblaikie Reviewed By: aprantl Subscribers: rnk, probinson, fhahn, aemerson, rengolin, JDevlieghere, llvm-commits Differential Revision: https://reviews.llvm.org/D41695 llvm-svn: 323313
2018-01-24 17:56:07 +08:00
; Check that a DISubrange built with an older version of LLVM is correctly restored.
; RUN: llvm-dis < %s.bc | FileCheck %s
; RUN: llvm-dis < %s.bc | llvm-as | llvm-dis | FileCheck %s
define void @foo(i32 %n) {
entry:
%array = alloca i32, i64 42, align 16
call void @llvm.dbg.declare(metadata i32* %array, metadata !19, metadata !12), !dbg !18
ret void
}
declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!3, !4, !5}
!llvm.ident = !{!6}
!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 5.0.1", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
!1 = !DIFile(filename: "vla.c", directory: "/path/to")
!2 = !{}
!3 = !{i32 2, !"Dwarf Version", i32 4}
!4 = !{i32 2, !"Debug Info Version", i32 3}
!5 = !{i32 1, !"wchar_size", i32 4}
!6 = !{!"clang version 5.0.1"}
[DebugInfo] Add DILabel metadata and intrinsic llvm.dbg.label. In order to set breakpoints on labels and list source code around labels, we need collect debug information for labels, i.e., label name, the function label belong, line number in the file, and the address label located. In order to keep these information in LLVM IR and to allow backend to generate debug information correctly. We create a new kind of metadata for labels, DILabel. The format of DILabel is !DILabel(scope: !1, name: "foo", file: !2, line: 3) We hope to keep debug information as much as possible even the code is optimized. So, we create a new kind of intrinsic for label metadata to avoid the metadata is eliminated with basic block. The intrinsic will keep existing if we keep it from optimized out. The format of the intrinsic is llvm.dbg.label(metadata !1) It has only one argument, that is the DILabel metadata. The intrinsic will follow the label immediately. Backend could get the label metadata through the intrinsic's parameter. We also create DIBuilder API for labels to be used by Frontend. Frontend could use createLabel() to allocate DILabel objects, and use insertLabel() to insert llvm.dbg.label intrinsic in LLVM IR. Differential Revision: https://reviews.llvm.org/D45024 Patch by Hsiangkai Wang. llvm-svn: 331841
2018-05-09 10:40:45 +08:00
!7 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 20, type: !8, isLocal: false, isDefinition: true, scopeLine: 20, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !11)
[Metadata] Extend 'count' field of DISubrange to take a metadata node Summary: This patch extends the DISubrange 'count' field to take either a (signed) constant integer value or a reference to a DILocalVariable or DIGlobalVariable. This is patch [1/3] in a series to extend LLVM's DISubrange Metadata node to support debugging of C99 variable length arrays and vectors with runtime length like the Scalable Vector Extension for AArch64. It is also a first step towards representing more complex cases like arrays in Fortran. Reviewers: echristo, pcc, aprantl, dexonsmith, clayborg, kristof.beyls, dblaikie Reviewed By: aprantl Subscribers: rnk, probinson, fhahn, aemerson, rengolin, JDevlieghere, llvm-commits Differential Revision: https://reviews.llvm.org/D41695 llvm-svn: 323313
2018-01-24 17:56:07 +08:00
!8 = !DISubroutineType(types: !9)
!9 = !{null, !10}
!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
!11 = !{!16, !19}
!12 = !DIExpression()
!16 = !DILocalVariable(name: "vla_expr", scope: !7, file: !1, line: 21, type: !17)
!17 = !DIBasicType(name: "long unsigned int", size: 64, encoding: DW_ATE_unsigned)
!18 = !DILocation(line: 21, column: 7, scope: !7)
!19 = !DILocalVariable(name: "array", scope: !7, file: !1, line: 21, type: !20)
!20 = !DICompositeType(tag: DW_TAG_array_type, baseType: !10, align: 32, elements: !21)
!21 = !{!22}
; CHECK-DAG: ![[NODE:[0-9]+]] = !DILocalVariable(name: "array"
; CHECK-DAG: ![[CONST:[0-9]+]] = !DISubrange(count: 42, lowerBound: 1)
; CHECK-DAG: ![[MULTI:[0-9]+]] = !{![[CONST]]}
; CHECK-DAG: elements: ![[MULTI]]
!22 = !DISubrange(count: 42, lowerBound: 1)