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1; RUN: llc -O0 -mtriple=x86_64-apple-darwin < %s -filetype=obj \
2; RUN:     | llvm-dwarfdump -debug-dump=info - \
3; RUN:     | FileCheck %s -check-prefix=CHECK -check-prefix=DWARF4
4; RUN: llc -O0 -mtriple=x86_64-apple-darwin < %s -filetype=obj -dwarf-version=3 \
5; RUN:     | llvm-dwarfdump -debug-dump=info - \
6; RUN:     | FileCheck %s -check-prefix=CHECK -check-prefix=DWARF3
7
8; FIXME: The location here needs to be fixed, but llvm-dwarfdump doesn't handle
9; DW_AT_location lists yet.
10; DWARF4: DW_AT_location [DW_FORM_sec_offset]                      (0x00000000)
11
12; FIXME: The location here needs to be fixed, but llvm-dwarfdump doesn't handle
13; DW_AT_location lists yet.
14; DWARF3: DW_AT_location [DW_FORM_data4]                      (0x00000000)
15
16; CHECK-NOT: DW_TAG
17; CHECK: DW_AT_name [DW_FORM_strp]  ( .debug_str[0x00000067] = "vla")
18
19; Unfortunately llvm-dwarfdump can't unparse a list of DW_AT_locations
20; right now, so we check the asm output:
21; RUN: llc -O0 -mtriple=x86_64-apple-darwin %s -o - -filetype=asm | FileCheck %s -check-prefix=ASM-CHECK
22; vla should have a register-indirect address at one point.
23; ASM-CHECK: DEBUG_VALUE: vla <- [%RCX+0]
24; ASM-CHECK: DW_OP_breg2
25
26; RUN: llvm-as %s -o - | llvm-dis - | FileCheck %s --check-prefix=PRETTY-PRINT
27; PRETTY-PRINT: DIExpression(DW_OP_deref)
28
29define void @testVLAwithSize(i32 %s) nounwind uwtable ssp !dbg !5 {
30entry:
31  %s.addr = alloca i32, align 4
32  %saved_stack = alloca i8*
33  %i = alloca i32, align 4
34  store i32 %s, i32* %s.addr, align 4
35  call void @llvm.dbg.declare(metadata i32* %s.addr, metadata !10, metadata !DIExpression()), !dbg !11
36  %0 = load i32, i32* %s.addr, align 4, !dbg !12
37  %1 = zext i32 %0 to i64, !dbg !12
38  %2 = call i8* @llvm.stacksave(), !dbg !12
39  store i8* %2, i8** %saved_stack, !dbg !12
40  %vla = alloca i32, i64 %1, align 16, !dbg !12
41  call void @llvm.dbg.declare(metadata i32* %vla, metadata !14, metadata !30), !dbg !18
42  call void @llvm.dbg.declare(metadata i32* %i, metadata !19, metadata !DIExpression()), !dbg !20
43  store i32 0, i32* %i, align 4, !dbg !21
44  br label %for.cond, !dbg !21
45
46for.cond:                                         ; preds = %for.inc, %entry
47  %3 = load i32, i32* %i, align 4, !dbg !21
48  %4 = load i32, i32* %s.addr, align 4, !dbg !21
49  %cmp = icmp slt i32 %3, %4, !dbg !21
50  br i1 %cmp, label %for.body, label %for.end, !dbg !21
51
52for.body:                                         ; preds = %for.cond
53  %5 = load i32, i32* %i, align 4, !dbg !23
54  %6 = load i32, i32* %i, align 4, !dbg !23
55  %mul = mul nsw i32 %5, %6, !dbg !23
56  %7 = load i32, i32* %i, align 4, !dbg !23
57  %idxprom = sext i32 %7 to i64, !dbg !23
58  %arrayidx = getelementptr inbounds i32, i32* %vla, i64 %idxprom, !dbg !23
59  store i32 %mul, i32* %arrayidx, align 4, !dbg !23
60  br label %for.inc, !dbg !25
61
62for.inc:                                          ; preds = %for.body
63  %8 = load i32, i32* %i, align 4, !dbg !26
64  %inc = add nsw i32 %8, 1, !dbg !26
65  store i32 %inc, i32* %i, align 4, !dbg !26
66  br label %for.cond, !dbg !26
67
68for.end:                                          ; preds = %for.cond
69  %9 = load i8*, i8** %saved_stack, !dbg !27
70  call void @llvm.stackrestore(i8* %9), !dbg !27
71  ret void, !dbg !27
72}
73
74declare void @llvm.dbg.declare(metadata, metadata, metadata) nounwind readnone
75
76declare i8* @llvm.stacksave() nounwind
77
78declare void @llvm.stackrestore(i8*) nounwind
79
80!llvm.dbg.cu = !{!0}
81!llvm.module.flags = !{!29}
82
83!0 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang version 3.2 (trunk 156005) (llvm/trunk 156000)", isOptimized: false, emissionKind: FullDebug, file: !28, enums: !1, retainedTypes: !1, globals: !1, imports:  !1)
84!1 = !{}
85!5 = distinct !DISubprogram(name: "testVLAwithSize", line: 1, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 2, file: !28, scope: !6, type: !7, variables: !1)
86!6 = !DIFile(filename: "bar.c", directory: "/Users/echristo/tmp")
87!7 = !DISubroutineType(types: !8)
88!8 = !{null, !9}
89!9 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
90!10 = !DILocalVariable(name: "s", line: 1, arg: 1, scope: !5, file: !6, type: !9)
91!11 = !DILocation(line: 1, column: 26, scope: !5)
92!12 = !DILocation(line: 3, column: 13, scope: !13)
93!13 = distinct !DILexicalBlock(line: 2, column: 1, file: !28, scope: !5)
94!14 = !DILocalVariable(name: "vla", line: 3, scope: !13, file: !6, type: !15)
95!15 = !DICompositeType(tag: DW_TAG_array_type, align: 32, baseType: !9, elements: !16)
96!16 = !{!17}
97!17 = !DISubrange(count: -1)
98!18 = !DILocation(line: 3, column: 7, scope: !13)
99!19 = !DILocalVariable(name: "i", line: 4, scope: !13, file: !6, type: !9)
100!20 = !DILocation(line: 4, column: 7, scope: !13)
101!21 = !DILocation(line: 5, column: 8, scope: !22)
102!22 = distinct !DILexicalBlock(line: 5, column: 3, file: !28, scope: !13)
103!23 = !DILocation(line: 6, column: 5, scope: !24)
104!24 = distinct !DILexicalBlock(line: 5, column: 27, file: !28, scope: !22)
105!25 = !DILocation(line: 7, column: 3, scope: !24)
106!26 = !DILocation(line: 5, column: 22, scope: !22)
107!27 = !DILocation(line: 8, column: 1, scope: !13)
108!28 = !DIFile(filename: "bar.c", directory: "/Users/echristo/tmp")
109!29 = !{i32 1, !"Debug Info Version", i32 3}
110!30 = !DIExpression(DW_OP_deref)
111