1; RUN: llc %s -mtriple=x86_64-pc-linux-gnu -O0 -o - | FileCheck %s
2
3; We are testing that a value in a 16 bit register gets reported as
4; being in its superregister.
5
6; CHECK: .byte   80                      # super-register DW_OP_reg0
7; No need to a piece at offset 0.
8; CHECK-NOT: DW_OP_piece
9; CHECK-NOT: DW_OP_bit_piece
10
11define i16 @f(i16 signext %zzz) nounwind !dbg !1 {
12entry:
13  call void @llvm.dbg.value(metadata i16 %zzz, metadata !0, metadata !DIExpression()), !dbg !DILocation(scope: !1)
14  %conv = sext i16 %zzz to i32, !dbg !7
15  %conv1 = trunc i32 %conv to i16
16  ret i16 %conv1
17}
18
19declare void @llvm.dbg.value(metadata, metadata, metadata) nounwind readnone
20
21!llvm.dbg.cu = !{!3}
22!llvm.module.flags = !{!11}
23!9 = !{!1}
24
25!0 = !DILocalVariable(name: "zzz", line: 3, arg: 1, scope: !1, file: !2, type: !6)
26!1 = distinct !DISubprogram(name: "f", line: 3, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !3, scopeLine: 3, file: !10, scope: !2, type: !4)
27!2 = !DIFile(filename: "/home/espindola/llvm/test.c", directory: "/home/espindola/tmpfs/build")
28!3 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang version 3.0 ()", isOptimized: false, emissionKind: FullDebug, file: !10, enums: !{}, retainedTypes: !{}, imports:  null)
29!4 = !DISubroutineType(types: !5)
30!5 = !{null}
31!6 = !DIBasicType(tag: DW_TAG_base_type, name: "short", size: 16, align: 16, encoding: DW_ATE_signed)
32!7 = !DILocation(line: 4, column: 22, scope: !8)
33!8 = distinct !DILexicalBlock(line: 3, column: 19, file: !10, scope: !1)
34!10 = !DIFile(filename: "/home/espindola/llvm/test.c", directory: "/home/espindola/tmpfs/build")
35!11 = !{i32 1, !"Debug Info Version", i32 3}
36