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When DwarfExpression is emitting a fragment that is located in a register and that fragment is smaller than the register, and the register must be composed from sub-registers (are you still with me?) the last DW_OP_piece operation must not be larger than the size of the fragment itself, since the last piece of the fragment could be smaller than the last subregister that is being emitted. rdar://problem/29779065 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@290324 91177308-0d34-0410-b5e6-96231b3b80d8
67 lines
3.2 KiB
LLVM
67 lines
3.2 KiB
LLVM
; RUN: llc %s -filetype=obj -o - | llvm-dwarfdump - | FileCheck %s
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; This tests a fragment that partially covers subregister compositions.
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;
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; Our fragment is 96 bits long and lies in a 128-bit register, which
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; in turn has to be composed out of its two 64-bit subregisters.
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; CHECK: .debug_info
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; CHECK: DW_TAG_subprogram
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; CHECK: DW_AT_name {{.*}}"subscript.get"
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; CHECK: DW_TAG_formal_parameter
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; CHECK-NEXT: DW_AT_location [DW_FORM_sec_offset] (0x00000000)
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; CHECK: .debug_loc
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; CHECK: 0x00000000: Beginning address offset
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; CHECK-NEXT: Ending address offset
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; CHECK-NEXT: Location description: 90 90 02 93 08 90 91 02 93 04
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; d16, piece 0x00000008, d17, piece 0x00000004
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source_filename = "simd.ll"
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target datalayout = "e-m:o-p:32:32-f64:32:64-v64:32:64-v128:32:128-a:0:32-n32-S32"
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target triple = "armv7-apple-ios7.0"
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; Function Attrs: nounwind readnone
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declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #0
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define <3 x float> @_TFV4simd8float2x3g9subscriptFSiVS_6float3(i32, <3 x float>, <3 x float>) !dbg !5 {
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entry:
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tail call void @llvm.dbg.value(metadata <3 x float> %1, i64 0, metadata !8, metadata !9), !dbg !10
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tail call void @llvm.dbg.value(metadata <3 x float> %2, i64 0, metadata !8, metadata !11), !dbg !10
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%3 = icmp eq i32 %0, 0, !dbg !12
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br i1 %3, label %7, label %4, !dbg !12
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; <label>:4: ; preds = %entry
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%5 = icmp eq i32 %0, 1, !dbg !15
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br i1 %5, label %7, label %6, !dbg !15
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; <label>:6: ; preds = %4
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unreachable, !dbg !17
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; <label>:7: ; preds = %4, %entry
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%8 = phi <3 x float> [ %1, %entry ], [ %2, %4 ], !dbg !18
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ret <3 x float> %8, !dbg !18
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}
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attributes #0 = { nounwind readnone }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!3, !4}
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!0 = distinct !DICompileUnit(language: DW_LANG_Swift, file: !1, producer: "Swift", isOptimized: false, runtimeVersion: 3, emissionKind: FullDebug, enums: !2, imports: !2)
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!1 = !DIFile(filename: "simd.swift", directory: "/")
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!2 = !{}
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!3 = !{i32 2, !"Dwarf Version", i32 4}
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!4 = !{i32 2, !"Debug Info Version", i32 3}
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!5 = distinct !DISubprogram(name: "subscript.get", linkageName: "_TFV4simd8float2x3g9subscriptFSiVS_6float3", scope: !6, file: !1, type: !7, isLocal: false, isDefinition: true, isOptimized: true, unit: !0, variables: !2)
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!6 = !DICompositeType(tag: DW_TAG_structure_type, name: "float2x3", scope: !0, file: !1, line: 5824, size: 256, align: 128, elements: !2, runtimeLang: DW_LANG_Swift, identifier: "_TtV4simd8float2x3")
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!7 = !DISubroutineType(types: !2)
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!8 = !DILocalVariable(name: "self", arg: 2, scope: !5, file: !1, line: 5897, type: !6, flags: DIFlagArtificial)
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!9 = !DIExpression(DW_OP_LLVM_fragment, 0, 96)
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!10 = !DILocation(line: 5897, column: 5, scope: !5)
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!11 = !DIExpression(DW_OP_LLVM_fragment, 96, 96)
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!12 = !DILocation(line: 5900, column: 12, scope: !13)
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!13 = distinct !DILexicalBlock(scope: !14, file: !1, line: 5898, column: 7)
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!14 = distinct !DILexicalBlock(scope: !5, file: !1, line: 5897, column: 9)
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!15 = !DILocation(line: 5902, column: 12, scope: !16)
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!16 = distinct !DILexicalBlock(scope: !14, file: !1, line: 5898, column: 7)
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!17 = !DILocation(line: 0, scope: !5)
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!18 = !DILocation(line: 5906, column: 5, scope: !14)
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