1; RUN: opt %s -sroa -verify -S -o - | FileCheck %s
2;
3; Test that we can partial emit debug info for aggregates repeatedly
4; split up by SROA.
5;
6;    // Compile with -O1
7;    typedef struct {
8;      int a;
9;      int b;
10;    } Inner;
11;
12;    typedef struct {
13;      Inner inner[2];
14;    } Outer;
15;
16;    int foo(Outer outer) {
17;      Inner i1 = outer.inner[1];
18;      return i1.a;
19;    }
20;
21
22; Verify that SROA creates a variable piece when splitting i1.
23; CHECK:  call void @llvm.dbg.value(metadata i64 %outer.coerce0, i64 0, metadata ![[O:[0-9]+]], metadata ![[PIECE1:[0-9]+]]),
24; CHECK:  call void @llvm.dbg.value(metadata i64 %outer.coerce1, i64 0, metadata ![[O]], metadata ![[PIECE2:[0-9]+]]),
25; CHECK:  call void @llvm.dbg.value({{.*}}, i64 0, metadata ![[I1:[0-9]+]], metadata ![[PIECE3:[0-9]+]]),
26; CHECK-DAG: ![[O]] = !DILocalVariable(name: "outer",{{.*}} line: 10
27; CHECK-DAG: ![[PIECE1]] = !DIExpression(DW_OP_bit_piece, 0, 64)
28; CHECK-DAG: ![[PIECE2]] = !DIExpression(DW_OP_bit_piece, 64, 64)
29; CHECK-DAG: ![[I1]] = !DILocalVariable(name: "i1",{{.*}} line: 11
30; CHECK-DAG: ![[PIECE3]] = !DIExpression(DW_OP_bit_piece, 0, 32)
31
32; ModuleID = 'sroasplit-2.c'
33target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
34target triple = "x86_64-apple-macosx10.9.0"
35
36%struct.Outer = type { [2 x %struct.Inner] }
37%struct.Inner = type { i32, i32 }
38
39; Function Attrs: nounwind ssp uwtable
40define i32 @foo(i64 %outer.coerce0, i64 %outer.coerce1) #0 !dbg !4 {
41  %outer = alloca %struct.Outer, align 8
42  %i1 = alloca %struct.Inner, align 4
43  %1 = bitcast %struct.Outer* %outer to { i64, i64 }*
44  %2 = getelementptr { i64, i64 }, { i64, i64 }* %1, i32 0, i32 0
45  store i64 %outer.coerce0, i64* %2
46  %3 = getelementptr { i64, i64 }, { i64, i64 }* %1, i32 0, i32 1
47  store i64 %outer.coerce1, i64* %3
48  call void @llvm.dbg.declare(metadata %struct.Outer* %outer, metadata !24, metadata !2), !dbg !25
49  call void @llvm.dbg.declare(metadata %struct.Inner* %i1, metadata !26, metadata !2), !dbg !27
50  %4 = getelementptr inbounds %struct.Outer, %struct.Outer* %outer, i32 0, i32 0, !dbg !27
51  %5 = getelementptr inbounds [2 x %struct.Inner], [2 x %struct.Inner]* %4, i32 0, i64 1, !dbg !27
52  %6 = bitcast %struct.Inner* %i1 to i8*, !dbg !27
53  %7 = bitcast %struct.Inner* %5 to i8*, !dbg !27
54  call void @llvm.memcpy.p0i8.p0i8.i64(i8* %6, i8* %7, i64 8, i32 4, i1 false), !dbg !27
55  %8 = getelementptr inbounds %struct.Inner, %struct.Inner* %i1, i32 0, i32 0, !dbg !28
56  %9 = load i32, i32* %8, align 4, !dbg !28
57  ret i32 %9, !dbg !28
58}
59
60; Function Attrs: nounwind readnone
61declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
62
63; Function Attrs: nounwind
64declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture readonly, i64, i32, i1) #2
65
66attributes #0 = { nounwind ssp uwtable "no-frame-pointer-elim"="true" }
67attributes #1 = { nounwind readnone }
68attributes #2 = { nounwind }
69
70!llvm.dbg.cu = !{!0}
71!llvm.module.flags = !{!21, !22}
72!llvm.ident = !{!23}
73
74!0 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang version 3.5.0 ", isOptimized: false, emissionKind: 1, file: !1, enums: !{}, retainedTypes: !{}, subprograms: !3, globals: !{}, imports: !{})
75!1 = !DIFile(filename: "sroasplit-2.c", directory: "")
76!2 = !DIExpression()
77!3 = !{!4}
78!4 = distinct !DISubprogram(name: "foo", line: 10, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, scopeLine: 10, file: !1, scope: !5, type: !6, variables: !{})
79!5 = !DIFile(filename: "sroasplit-2.c", directory: "")
80!6 = !DISubroutineType(types: !7)
81!7 = !{!8, !9}
82!8 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
83!9 = !DIDerivedType(tag: DW_TAG_typedef, name: "Outer", line: 8, file: !1, baseType: !10)
84!10 = !DICompositeType(tag: DW_TAG_structure_type, line: 6, size: 128, align: 32, file: !1, elements: !11)
85!11 = !{!12}
86!12 = !DIDerivedType(tag: DW_TAG_member, name: "inner", line: 7, size: 128, align: 32, file: !1, scope: !10, baseType: !13)
87!13 = !DICompositeType(tag: DW_TAG_array_type, size: 128, align: 32, baseType: !14, elements: !19)
88!14 = !DIDerivedType(tag: DW_TAG_typedef, name: "Inner", line: 4, file: !1, baseType: !15)
89!15 = !DICompositeType(tag: DW_TAG_structure_type, line: 1, size: 64, align: 32, file: !1, elements: !16)
90!16 = !{!17, !18}
91!17 = !DIDerivedType(tag: DW_TAG_member, name: "a", line: 2, size: 32, align: 32, file: !1, scope: !15, baseType: !8)
92!18 = !DIDerivedType(tag: DW_TAG_member, name: "b", line: 3, size: 32, align: 32, offset: 32, file: !1, scope: !15, baseType: !8)
93!19 = !{!20}
94!20 = !DISubrange(count: 2)
95!21 = !{i32 2, !"Dwarf Version", i32 2}
96!22 = !{i32 1, !"Debug Info Version", i32 3}
97!23 = !{!"clang version 3.5.0 "}
98!24 = !DILocalVariable(name: "outer", line: 10, arg: 1, scope: !4, file: !5, type: !9)
99!25 = !DILocation(line: 10, scope: !4)
100!26 = !DILocalVariable(name: "i1", line: 11, scope: !4, file: !5, type: !14)
101!27 = !DILocation(line: 11, scope: !4)
102!28 = !DILocation(line: 12, scope: !4)
103