1; RUN: llc < %s -mtriple=armv7-linux-gnueabihf -stop-before=finalize-isel | FileCheck %s
2
3; When splitting-up integers during CodeGen, if the debug info contains
4; an expression with carry operators (i.e. arithmetic and shift ops), the
5; debug information will be dropped as these operators cannot be correctly
6; expressed across different registers.
7
8; CHECK: [[HIGH:![0-9]+]] = !DILocalVariable(name: "high"
9; CHECK: [[LOW:![0-9]+]] = !DILocalVariable(name: "low"
10;
11; As the debug information for "high" contains an arithmetic shift, while for
12; "low" it does not, only the former should be undefined.
13; CHECK-LABEL: body:
14; CHECK: [[LOWR:%[0-9]+]]:gpr = COPY $r0
15; CHECK: DBG_VALUE [[LOWR]], $noreg, [[LOW]]
16; CHECK: DBG_VALUE $noreg, $noreg, [[HIGH]]
17; CHECK: DBG_VALUE $noreg, $noreg, [[HIGH]]
18
19define dso_local i64 @_Z2fnx(i64 returned %value) local_unnamed_addr !dbg !7 {
20entry:
21  call void @llvm.dbg.value(metadata i64 %value, metadata !13, metadata !DIExpression()), !dbg !17
22  call void @llvm.dbg.value(metadata i64 %value, metadata !14, metadata !DIExpression(DW_OP_constu, 32, DW_OP_shra, DW_OP_LLVM_convert, 64, DW_ATE_unsigned, DW_OP_LLVM_convert, 32, DW_ATE_unsigned, DW_OP_stack_value)), !dbg !17
23  call void @llvm.dbg.value(metadata i64 %value, metadata !16, metadata !DIExpression(DW_OP_LLVM_convert, 64, DW_ATE_unsigned, DW_OP_LLVM_convert, 32, DW_ATE_unsigned, DW_OP_stack_value)), !dbg !17
24  ret i64 %value, !dbg !18
25}
26
27declare void @llvm.dbg.value(metadata, metadata, metadata)
28
29!llvm.dbg.cu = !{!0}
30!llvm.module.flags = !{!3, !4, !5}
31!llvm.ident = !{!6}
32
33!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !1, producer: "clang version 10.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, nameTableKind: None)
34!1 = !DIFile(filename: "test.cpp", directory: "/tmp")
35!2 = !{}
36!3 = !{i32 2, !"Dwarf Version", i32 4}
37!4 = !{i32 2, !"Debug Info Version", i32 3}
38!5 = !{i32 1, !"wchar_size", i32 4}
39!6 = !{!"clang version 10.0.0"}
40!7 = distinct !DISubprogram(name: "fn", linkageName: "_Z2fnx", scope: !8, file: !8, line: 2, type: !9, scopeLine: 2, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !12)
41!8 = !DIFile(filename: "test.cpp", directory: "/tmp")
42!9 = !DISubroutineType(types: !10)
43!10 = !{!11, !11}
44!11 = !DIBasicType(name: "long long int", size: 64, encoding: DW_ATE_signed)
45!12 = !{!13, !14, !16}
46!13 = !DILocalVariable(name: "value", arg: 1, scope: !7, file: !8, line: 2, type: !11)
47!14 = !DILocalVariable(name: "high", scope: !7, file: !8, line: 3, type: !15)
48!15 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
49!16 = !DILocalVariable(name: "low", scope: !7, file: !8, line: 4, type: !15)
50!17 = !DILocation(line: 0, scope: !7)
51!18 = !DILocation(line: 5, column: 3, scope: !7)
52