1 ; RUN: llc -O0 -mtriple=x86_64-apple-darwin -filetype=asm %s -o - | FileCheck %s
2 ; Ensure that we generate an indirect location for the variable length array a.
3 ; CHECK: ##DEBUG_VALUE: vla:a <- [DW_OP_deref] [{{\$r[a-z]+}}+0]
4 ; CHECK: DW_OP_breg{{[0-9]}}
5 ; rdar://problem/13658587
15 ; int main(int argc, char** argv) {
20 target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
21 target triple = "x86_64-apple-macosx10.8.0"
23 ; Function Attrs: nounwind ssp uwtable
24 define i32 @vla(i32 %n) nounwind ssp uwtable !dbg !4 {
26 %n.addr = alloca i32, align 4
27 %saved_stack = alloca ptr
28 %cleanup.dest.slot = alloca i32
29 store i32 %n, ptr %n.addr, align 4
30 call void @llvm.dbg.declare(metadata ptr %n.addr, metadata !15, metadata !DIExpression()), !dbg !16
31 %0 = load i32, ptr %n.addr, align 4, !dbg !17
32 %1 = zext i32 %0 to i64, !dbg !17
33 %2 = call ptr @llvm.stacksave(), !dbg !17
34 store ptr %2, ptr %saved_stack, !dbg !17
35 %vla = alloca i32, i64 %1, align 16, !dbg !17
36 call void @llvm.dbg.declare(metadata ptr %vla, metadata !18, metadata !DIExpression(DW_OP_deref)), !dbg !17
37 store i32 42, ptr %vla, align 4, !dbg !22
38 %3 = load i32, ptr %n.addr, align 4, !dbg !23
39 %sub = sub nsw i32 %3, 1, !dbg !23
40 %idxprom = sext i32 %sub to i64, !dbg !23
41 %arrayidx1 = getelementptr inbounds i32, ptr %vla, i64 %idxprom, !dbg !23
42 %4 = load i32, ptr %arrayidx1, align 4, !dbg !23
43 store i32 1, ptr %cleanup.dest.slot
44 %5 = load ptr, ptr %saved_stack, !dbg !24
45 call void @llvm.stackrestore(ptr %5), !dbg !24
49 ; Function Attrs: nounwind readnone
50 declare void @llvm.dbg.declare(metadata, metadata, metadata) nounwind readnone
52 ; Function Attrs: nounwind
53 declare ptr @llvm.stacksave() nounwind
55 ; Function Attrs: nounwind
56 declare void @llvm.stackrestore(ptr) nounwind
58 ; Function Attrs: nounwind ssp uwtable
59 define i32 @main(i32 %argc, ptr %argv) nounwind ssp uwtable !dbg !9 {
61 %retval = alloca i32, align 4
62 %argc.addr = alloca i32, align 4
63 %argv.addr = alloca ptr, align 8
64 store i32 0, ptr %retval
65 store i32 %argc, ptr %argc.addr, align 4
66 call void @llvm.dbg.declare(metadata ptr %argc.addr, metadata !25, metadata !DIExpression()), !dbg !26
67 store ptr %argv, ptr %argv.addr, align 8
68 call void @llvm.dbg.declare(metadata ptr %argv.addr, metadata !27, metadata !DIExpression()), !dbg !26
69 %0 = load i32, ptr %argc.addr, align 4, !dbg !28
70 %call = call i32 @vla(i32 %0), !dbg !28
71 ret i32 %call, !dbg !28
75 !llvm.module.flags = !{!29}
77 !0 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang version 3.3 ", isOptimized: false, emissionKind: FullDebug, file: !1, enums: !2, retainedTypes: !2, globals: !2, imports: !2)
78 !1 = !DIFile(filename: "vla.c", directory: "")
80 !4 = distinct !DISubprogram(name: "vla", line: 1, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 1, file: !1, scope: !5, type: !6, retainedNodes: !2)
81 !5 = !DIFile(filename: "vla.c", directory: "")
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 = distinct !DISubprogram(name: "main", line: 7, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 7, file: !1, scope: !5, type: !10, retainedNodes: !2)
86 !10 = !DISubroutineType(types: !11)
88 !12 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, baseType: !13)
89 !13 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, baseType: !14)
90 !14 = !DIBasicType(tag: DW_TAG_base_type, name: "char", size: 8, align: 8, encoding: DW_ATE_signed_char)
91 !15 = !DILocalVariable(name: "n", line: 1, arg: 1, scope: !4, file: !5, type: !8)
92 !16 = !DILocation(line: 1, scope: !4)
93 !17 = !DILocation(line: 2, scope: !4)
94 !18 = !DILocalVariable(name: "a", line: 2, scope: !4, file: !5, type: !19)
95 !19 = !DICompositeType(tag: DW_TAG_array_type, align: 32, baseType: !8, elements: !20)
97 !21 = !DISubrange(count: -1)
98 !22 = !DILocation(line: 3, scope: !4)
99 !23 = !DILocation(line: 4, scope: !4)
100 !24 = !DILocation(line: 5, scope: !4)
101 !25 = !DILocalVariable(name: "argc", line: 7, arg: 1, scope: !9, file: !5, type: !8)
102 !26 = !DILocation(line: 7, scope: !9)
103 !27 = !DILocalVariable(name: "argv", line: 7, arg: 2, scope: !9, file: !5, type: !12)
104 !28 = !DILocation(line: 8, scope: !9)
105 !29 = !{i32 1, !"Debug Info Version", i32 3}