1; RUN: llc -O0 %s -filetype=obj -o %t.o
2; RUN: llvm-dwarfdump -debug-loc %t.o | FileCheck %s
3;
4; rdar://problem/15928306
5;
6; Test that we can emit debug info for aggregate values that are split
7; up across multiple registers by SROA.
8;
9;    // Compile with -O1.
10;    typedef struct { long int a; int b;} S;
11;
12;    int foo(S s) {
13;            return s.b;
14;    }
15;
16;
17; CHECK: .debug_loc contents:
18;
19
20; CHECK: [0x0000000000000000, 0x[[LTMP3:.*]]): DW_OP_reg5 RDI, DW_OP_piece 0x8, DW_OP_reg4 RSI, DW_OP_piece 0x4
21; 0x0000000000000006 - 0x0000000000000008: rbp-8, piece 0x8, rax, piece 0x4 )
22; CHECK: [0x[[LTMP3]], {{.*}}): DW_OP_breg6 RBP-8, DW_OP_piece 0x8, DW_OP_reg4 RSI, DW_OP_piece 0x4
23
24target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
25target triple = "x86_64-apple-macosx10.9.0"
26
27; Function Attrs: nounwind ssp uwtable
28define i32 @foo(i64 %s.coerce0, i32 %s.coerce1) #0 !dbg !4 {
29entry:
30  call void @llvm.dbg.value(metadata i64 %s.coerce0, metadata !20, metadata !24), !dbg !21
31  call void @llvm.dbg.value(metadata i32 %s.coerce1, metadata !22, metadata !27), !dbg !21
32  ret i32 %s.coerce1, !dbg !23
33}
34
35; Function Attrs: nounwind readnone
36declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
37
38; Function Attrs: nounwind readnone
39declare void @llvm.dbg.value(metadata, metadata, metadata) #1
40
41attributes #0 = { nounwind ssp uwtable "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" }
42attributes #1 = { nounwind readnone }
43
44!llvm.dbg.cu = !{!0}
45!llvm.module.flags = !{!17, !18}
46!llvm.ident = !{!19}
47
48!0 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang version 3.5 ", isOptimized: true, emissionKind: FullDebug, file: !1, enums: !2, retainedTypes: !2, globals: !2, imports: !2)
49!1 = !DIFile(filename: "pieces.c", directory: "")
50!2 = !{}
51!4 = distinct !DISubprogram(name: "foo", line: 3, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !0, scopeLine: 3, file: !1, scope: !5, type: !6, retainedNodes: !15)
52!5 = !DIFile(filename: "pieces.c", directory: "")
53!6 = !DISubroutineType(types: !7)
54!7 = !{!8, !9}
55!8 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
56!9 = !DIDerivedType(tag: DW_TAG_typedef, name: "S", line: 1, file: !1, baseType: !10)
57!10 = !DICompositeType(tag: DW_TAG_structure_type, line: 1, size: 128, align: 64, file: !1, elements: !11)
58!11 = !{!12, !14}
59!12 = !DIDerivedType(tag: DW_TAG_member, name: "a", line: 1, size: 64, align: 64, file: !1, scope: !10, baseType: !13)
60!13 = !DIBasicType(tag: DW_TAG_base_type, name: "long int", size: 64, align: 64, encoding: DW_ATE_signed)
61!14 = !DIDerivedType(tag: DW_TAG_member, name: "b", line: 1, size: 32, align: 32, offset: 64, file: !1, scope: !10, baseType: !8)
62!15 = !{!16}
63!16 = !DILocalVariable(name: "s", line: 3, arg: 1, scope: !4, file: !5, type: !9)
64!17 = !{i32 2, !"Dwarf Version", i32 4}
65!18 = !{i32 1, !"Debug Info Version", i32 3}
66!19 = !{!"clang version 3.5 "}
67!20 = !DILocalVariable(name: "s", line: 3, arg: 1, scope: !4, file: !5, type: !9)
68!21 = !DILocation(line: 3, scope: !4)
69!22 = !DILocalVariable(name: "s", line: 3, arg: 1, scope: !4, file: !5, type: !9)
70!23 = !DILocation(line: 4, scope: !4)
71!24 = !DIExpression(DW_OP_LLVM_fragment, 0, 64)
72!25 = !{}
73!27 = !DIExpression(DW_OP_LLVM_fragment, 64, 32)
74