1; RUN: llc -mtriple x86_64-pc-linux -O0 < %s | FileCheck %s
2
3; Make sure that the sequence of debug locations for function foo is correctly
4; generated. More specifically, .loc entries for lines 4,5,6,7 must appear in
5; the correct sequence.
6
7; $ clang -emit-llvm -S -g dbg-combine.c
8; 1.  int foo()
9; 2.  {
10; 3.     int elems = 3;
11; 4.     int array1[elems];
12; 5.     array1[0]=0;
13; 6.     array1[1]=1;
14; 7.     array1[2]=2;
15; 8.     int array2[elems];
16; 9.     array2[0]=1;
17; 10.    return array2[0];
18; 11. }
19
20; CHECK: .loc    1 4
21; CHECK: .loc    1 5
22; CHECK: .loc    1 6
23; CHECK: .loc    1 7
24
25; ModuleID = 'dbg-combine.c'
26; Function Attrs: nounwind uwtable
27define i32 @foo() #0 !dbg !4 {
28entry:
29  %elems = alloca i32, align 4
30  %saved_stack = alloca i8*
31  %cleanup.dest.slot = alloca i32
32  call void @llvm.dbg.declare(metadata i32* %elems, metadata !12, metadata !13), !dbg !14
33  store i32 3, i32* %elems, align 4, !dbg !14
34  %0 = load i32, i32* %elems, align 4, !dbg !15
35  %1 = zext i32 %0 to i64, !dbg !16
36  %2 = call i8* @llvm.stacksave(), !dbg !16
37  store i8* %2, i8** %saved_stack, !dbg !16
38  %vla = alloca i32, i64 %1, align 16, !dbg !16
39  call void @llvm.dbg.declare(metadata i32* %vla, metadata !17, metadata !21), !dbg !22
40  %arrayidx = getelementptr inbounds i32, i32* %vla, i64 0, !dbg !23
41  store i32 0, i32* %arrayidx, align 4, !dbg !24
42  %arrayidx1 = getelementptr inbounds i32, i32* %vla, i64 1, !dbg !25
43  store i32 1, i32* %arrayidx1, align 4, !dbg !26
44  %arrayidx2 = getelementptr inbounds i32, i32* %vla, i64 2, !dbg !27
45  store i32 2, i32* %arrayidx2, align 4, !dbg !28
46  %3 = load i32, i32* %elems, align 4, !dbg !29
47  %4 = zext i32 %3 to i64, !dbg !30
48  %vla3 = alloca i32, i64 %4, align 16, !dbg !30
49  call void @llvm.dbg.declare(metadata i32* %vla3, metadata !31, metadata !21), !dbg !32
50  %arrayidx4 = getelementptr inbounds i32, i32* %vla3, i64 0, !dbg !33
51  store i32 1, i32* %arrayidx4, align 4, !dbg !34
52  %arrayidx5 = getelementptr inbounds i32, i32* %vla3, i64 0, !dbg !35
53  %5 = load i32, i32* %arrayidx5, align 4, !dbg !35
54  store i32 1, i32* %cleanup.dest.slot
55  %6 = load i8*, i8** %saved_stack, !dbg !36
56  call void @llvm.stackrestore(i8* %6), !dbg !36
57  ret i32 %5, !dbg !36
58}
59
60; Function Attrs: nounwind readnone
61declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
62
63; Function Attrs: nounwind
64declare i8* @llvm.stacksave() #2
65
66; Function Attrs: nounwind
67declare void @llvm.stackrestore(i8*) #2
68
69attributes #0 = { nounwind uwtable "less-precise-fpmad"="false" "frame-pointer"="all" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
70attributes #1 = { nounwind readnone }
71attributes #2 = { nounwind }
72
73!llvm.dbg.cu = !{!0}
74!llvm.module.flags = !{!9, !10}
75!llvm.ident = !{!11}
76
77!0 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang version 3.7.0 (trunk 227074)", isOptimized: false, emissionKind: FullDebug, file: !1, enums: !2, retainedTypes: !2, globals: !2, imports: !2)
78!1 = !DIFile(filename: "dbg-combine.c", directory: "/home/probinson/projects/scratch")
79!2 = !{}
80!4 = distinct !DISubprogram(name: "foo", line: 1, isLocal: false, isDefinition: true, isOptimized: false, unit: !0, scopeLine: 2, file: !1, scope: !5, type: !6, retainedNodes: !2)
81!5 = !DIFile(filename: "dbg-combine.c", directory: "/home/probinson/projects/scratch")
82!6 = !DISubroutineType(types: !7)
83!7 = !{!8}
84!8 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
85!9 = !{i32 2, !"Dwarf Version", i32 4}
86!10 = !{i32 2, !"Debug Info Version", i32 3}
87!11 = !{!"clang version 3.7.0 (trunk 227074)"}
88!12 = !DILocalVariable(name: "elems", line: 3, scope: !4, file: !5, type: !8)
89!13 = !DIExpression()
90!14 = !DILocation(line: 3, column: 8, scope: !4)
91!15 = !DILocation(line: 4, column: 15, scope: !4)
92!16 = !DILocation(line: 4, column: 4, scope: !4)
93!17 = !DILocalVariable(name: "array1", line: 4, scope: !4, file: !5, type: !18)
94!18 = !DICompositeType(tag: DW_TAG_array_type, align: 32, baseType: !8, elements: !19)
95!19 = !{!20}
96!20 = !DISubrange(count: -1)
97!21 = !DIExpression(DW_OP_deref)
98!22 = !DILocation(line: 4, column: 8, scope: !4)
99!23 = !DILocation(line: 5, column: 4, scope: !4)
100!24 = !DILocation(line: 5, column: 13, scope: !4)
101!25 = !DILocation(line: 6, column: 4, scope: !4)
102!26 = !DILocation(line: 6, column: 13, scope: !4)
103!27 = !DILocation(line: 7, column: 4, scope: !4)
104!28 = !DILocation(line: 7, column: 13, scope: !4)
105!29 = !DILocation(line: 8, column: 15, scope: !4)
106!30 = !DILocation(line: 8, column: 4, scope: !4)
107!31 = !DILocalVariable(name: "array2", line: 8, scope: !4, file: !5, type: !18)
108!32 = !DILocation(line: 8, column: 8, scope: !4)
109!33 = !DILocation(line: 9, column: 4, scope: !4)
110!34 = !DILocation(line: 9, column: 13, scope: !4)
111!35 = !DILocation(line: 10, column: 11, scope: !4)
112!36 = !DILocation(line: 11, column: 1, scope: !4)
113