1; RUN: opt -S -globalopt < %s | FileCheck %s
2source_filename = "test.c"
3target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
4target triple = "x86_64-apple-macosx10.12.0"
5
6%struct.mystruct = type { i32, i64 }
7; Generated at -Os from:
8;
9; static struct { int a; char b; } array[2];
10; void __attribute__((nodebug)) foo(int in) { array[0].a = in; }
11; void __attribute__((nodebug)) bar(int in) { array[1].a = in; }
12; int main(int argc, char **argv)
13; {
14;   foo(argv[0][1]);
15;   bar(argv[0][1]);
16;   return array[0].a + array[1].a;
17; }
18
19%struct.anon = type { i32, i8 }
20
21; This array is first split into two struct, which are then split into their
22; elements, of which only .a survives.
23@array = internal global [2 x %struct.anon] zeroinitializer, align 16, !dbg !0
24; CHECK: @array.0.0 = internal unnamed_addr global i32 0, align 16, !dbg ![[EL0:.*]]
25; CHECK: @array.1.0 = internal unnamed_addr global i32 0, align 8, !dbg ![[EL1:.*]]
26;
27; CHECK: ![[EL0]] = !DIGlobalVariableExpression(var: ![[VAR:.*]], expr: !DIExpression(DW_OP_LLVM_fragment, 0, 32))
28; CHECK: ![[VAR]] = distinct !DIGlobalVariable(name: "array"
29; CHECK: ![[EL1]] = !DIGlobalVariableExpression(var: ![[VAR]], expr: !DIExpression(DW_OP_LLVM_fragment, 64, 32))
30
31
32; Function Attrs: nounwind optsize ssp uwtable
33define void @foo(i32 %in) #0 {
34entry:
35  store i32 %in, i32* getelementptr inbounds ([2 x %struct.anon], [2 x %struct.anon]* @array, i64 0, i64 0, i32 0), align 16, !tbaa !20
36  ret void
37}
38
39; Function Attrs: nounwind optsize ssp uwtable
40define void @bar(i32 %in) #0 {
41entry:
42  store i32 %in, i32* getelementptr inbounds ([2 x %struct.anon], [2 x %struct.anon]* @array, i64 0, i64 1, i32 0), align 8, !tbaa !20
43  ret void
44}
45
46; Function Attrs: nounwind optsize ssp uwtable
47define i32 @main(i32 %argc, i8** %argv) #0 !dbg !25 {
48entry:
49  call void @llvm.dbg.value(metadata i32 %argc, metadata !31, metadata !33), !dbg !34
50  call void @llvm.dbg.value(metadata i8** %argv, metadata !32, metadata !33), !dbg !35
51  %0 = load i8*, i8** %argv, align 8, !dbg !36, !tbaa !37
52  %arrayidx1 = getelementptr inbounds i8, i8* %0, i64 1, !dbg !36
53  %1 = load i8, i8* %arrayidx1, align 1, !dbg !36, !tbaa !39
54  %conv = sext i8 %1 to i32, !dbg !36
55  call void @foo(i32 %conv) #2, !dbg !40
56  %2 = load i8*, i8** %argv, align 8, !dbg !41, !tbaa !37
57  %arrayidx3 = getelementptr inbounds i8, i8* %2, i64 1, !dbg !41
58  %3 = load i8, i8* %arrayidx3, align 1, !dbg !41, !tbaa !39
59  %conv4 = sext i8 %3 to i32, !dbg !41
60  call void @bar(i32 %conv4) #2, !dbg !42
61  %4 = load i32, i32* getelementptr inbounds ([2 x %struct.anon], [2 x %struct.anon]* @array, i64 0, i64 0, i32 0), align 16, !dbg !43, !tbaa !20
62  %5 = load i32, i32* getelementptr inbounds ([2 x %struct.anon], [2 x %struct.anon]* @array, i64 0, i64 1, i32 0), align 8, !dbg !44, !tbaa !20
63  %add = add nsw i32 %4, %5, !dbg !45
64  ret i32 %add, !dbg !46
65}
66
67; Function Attrs: nounwind readnone speculatable
68declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
69
70; Function Attrs: nounwind readnone speculatable
71declare void @llvm.dbg.value(metadata, metadata, metadata) #1
72
73attributes #0 = { nounwind optsize ssp uwtable "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "frame-pointer"="all" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="penryn" "target-features"="+cx16,+fxsr,+mmx,+sse,+sse2,+sse3,+sse4.1,+ssse3,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" }
74attributes #1 = { nounwind readnone speculatable }
75attributes #2 = { optsize }
76
77!llvm.dbg.cu = !{!2}
78!llvm.module.flags = !{!15, !16, !17, !18}
79!llvm.ident = !{!19}
80
81!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
82!1 = distinct !DIGlobalVariable(name: "array", scope: !2, file: !3, line: 1, type: !6, isLocal: true, isDefinition: true)
83!2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang version 6.0.0 (trunk 309960) (llvm/trunk 309961)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5)
84!3 = !DIFile(filename: "test.c", directory: "/")
85!4 = !{}
86!5 = !{!0}
87!6 = !DICompositeType(tag: DW_TAG_array_type, baseType: !7, size: 128, elements: !13)
88!7 = distinct !DICompositeType(tag: DW_TAG_structure_type, file: !3, line: 1, size: 64, elements: !8)
89!8 = !{!9, !11}
90!9 = !DIDerivedType(tag: DW_TAG_member, name: "a", scope: !7, file: !3, line: 1, baseType: !10, size: 32)
91!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
92!11 = !DIDerivedType(tag: DW_TAG_member, name: "b", scope: !7, file: !3, line: 1, baseType: !12, size: 8, offset: 32)
93!12 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char)
94!13 = !{!14}
95!14 = !DISubrange(count: 2)
96!15 = !{i32 2, !"Dwarf Version", i32 4}
97!16 = !{i32 2, !"Debug Info Version", i32 3}
98!17 = !{i32 1, !"wchar_size", i32 4}
99!18 = !{i32 7, !"PIC Level", i32 2}
100!19 = !{!"clang version 6.0.0 (trunk 309960) (llvm/trunk 309961)"}
101!20 = !{!21, !22, i64 0}
102!21 = !{!"", !22, i64 0, !23, i64 4}
103!22 = !{!"int", !23, i64 0}
104!23 = !{!"omnipotent char", !24, i64 0}
105!24 = !{!"Simple C/C++ TBAA"}
106!25 = distinct !DISubprogram(name: "main", scope: !3, file: !3, line: 4, type: !26, isLocal: false, isDefinition: true, scopeLine: 5, flags: DIFlagPrototyped, isOptimized: true, unit: !2, retainedNodes: !30)
107!26 = !DISubroutineType(types: !27)
108!27 = !{!10, !10, !28}
109!28 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !29, size: 64)
110!29 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !12, size: 64)
111!30 = !{!31, !32}
112!31 = !DILocalVariable(name: "argc", arg: 1, scope: !25, file: !3, line: 4, type: !10)
113!32 = !DILocalVariable(name: "argv", arg: 2, scope: !25, file: !3, line: 4, type: !28)
114!33 = !DIExpression()
115!34 = !DILocation(line: 4, column: 14, scope: !25)
116!35 = !DILocation(line: 4, column: 27, scope: !25)
117!36 = !DILocation(line: 6, column: 7, scope: !25)
118!37 = !{!38, !38, i64 0}
119!38 = !{!"any pointer", !23, i64 0}
120!39 = !{!23, !23, i64 0}
121!40 = !DILocation(line: 6, column: 3, scope: !25)
122!41 = !DILocation(line: 7, column: 7, scope: !25)
123!42 = !DILocation(line: 7, column: 3, scope: !25)
124!43 = !DILocation(line: 8, column: 19, scope: !25)
125!44 = !DILocation(line: 8, column: 32, scope: !25)
126!45 = !DILocation(line: 8, column: 21, scope: !25)
127!46 = !DILocation(line: 8, column: 3, scope: !25)
128