1 ; RUN: llc -mtriple x86_64-pc-linux -O0 < %s | FileCheck %s
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.
7 ; $ clang -emit-llvm -S -g dbg-combine.c
11 ; 4. int array1[elems];
15 ; 8. int array2[elems];
17 ; 10. return array2[0];
25 ; ModuleID = 'dbg-combine.c'
26 ; Function Attrs: nounwind uwtable
27 define i32 @foo() #0 !dbg !4 {
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
60 ; Function Attrs: nounwind readnone
61 declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
63 ; Function Attrs: nounwind
64 declare i8* @llvm.stacksave() #2
66 ; Function Attrs: nounwind
67 declare void @llvm.stackrestore(i8*) #2
69 attributes #0 = { nounwind uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
70 attributes #1 = { nounwind readnone }
71 attributes #2 = { nounwind }
74 !llvm.module.flags = !{!9, !10}
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")
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)
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)
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)
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)