xref: /llvm-project/llvm/test/DebugInfo/X86/vla-global.ll (revision 5ee088134fb87f7d716c58fa65beb11fb6afcb22) 
1; RUN: llc -mtriple=x86_64-apple-darwin %s -o - -filetype=obj | llvm-dwarfdump - | FileCheck %s
2; RUN: llc --try-experimental-debuginfo-iterators -mtriple=x86_64-apple-darwin %s -o - -filetype=obj | llvm-dwarfdump - | FileCheck %s
3
4; CHECK: 0x00000[[G:.*]]:     DW_TAG_variable
5; CHECK-NEXT:                DW_AT_name	("g")
6; CHECK: DW_TAG_array_type
7; CHECK-NEXT:  DW_AT_type	({{.*}} "int")
8; CHECK-NOT: DW_TAG
9; CHECK:       DW_TAG_subrange_type
10; CHECK-NEXT:     DW_AT_type	({{.*}} "__ARRAY_SIZE_TYPE__")
11; CHECK-NEXT:      DW_AT_count	(0x00000[[G]])
12; Test that a VLA referring to a global variable is handled correctly.
13; Clang doesn't generate this, but the verifier allows it.
14source_filename = "/tmp/test.c"
15target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
16target triple = "x86_64-apple-macosx10.13.0"
17
18@g = common local_unnamed_addr global i32 0, align 4, !dbg !0
19
20define void @f() !dbg !12 {
21entry:
22  %0 = load i32, ptr @g, align 4, !dbg !22
23  %1 = zext i32 %0 to i64, !dbg !22
24  %vla = alloca i32, i64 %1, align 16, !dbg !22
25  call void @llvm.dbg.declare(metadata ptr %vla, metadata !16, metadata !DIExpression()), !dbg !22
26  call void @llvm.dbg.value(metadata i32 2, metadata !21, metadata !DIExpression()), !dbg !22
27  %call = call i32 (ptr, ...) @use(ptr nonnull %vla), !dbg !22
28  ret void, !dbg !22
29}
30
31; Function Attrs: nounwind readnone speculatable
32declare void @llvm.dbg.declare(metadata, metadata, metadata) #0
33
34declare i32 @use(...) local_unnamed_addr
35
36; Function Attrs: nounwind readnone speculatable
37declare void @llvm.dbg.value(metadata, metadata, metadata) #0
38
39attributes #0 = { nounwind readnone speculatable }
40
41!llvm.dbg.cu = !{!2}
42!llvm.module.flags = !{!7, !8, !9, !10}
43!llvm.ident = !{!11}
44
45!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
46!1 = distinct !DIGlobalVariable(name: "g", scope: !2, file: !3, line: 1, type: !6, isLocal: false, isDefinition: true)
47!2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang version 7.0.0 (trunk 324259) (llvm/trunk 324261)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5)
48!3 = !DIFile(filename: "/tmp/test.c", directory: "/")
49!4 = !{}
50!5 = !{!0}
51!6 = !DIBasicType(name: "unsigned int", size: 32, encoding: DW_ATE_unsigned)
52!7 = !{i32 2, !"Dwarf Version", i32 4}
53!8 = !{i32 2, !"Debug Info Version", i32 3}
54!9 = !{i32 1, !"wchar_size", i32 4}
55!10 = !{i32 7, !"PIC Level", i32 2}
56!11 = !{!"clang version 7.0.0 (trunk 324259) (llvm/trunk 324261)"}
57!12 = distinct !DISubprogram(name: "f", scope: !3, file: !3, line: 3, type: !13, isLocal: false, isDefinition: true, scopeLine: 3, isOptimized: true, unit: !2, retainedNodes: !15)
58!13 = !DISubroutineType(types: !14)
59!14 = !{null}
60!15 = !{!16, !21}
61!16 = !DILocalVariable(name: "array", scope: !12, file: !3, line: 4, type: !17)
62!17 = !DICompositeType(tag: DW_TAG_array_type, baseType: !18, elements: !19)
63!18 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
64!19 = !{!20}
65!20 = !DISubrange(count: !1)
66!21 = !DILocalVariable(name: "count", scope: !12, file: !3, line: 5, type: !18)
67!22 = !DILocation(line: 7, column: 1, scope: !12)
68