1 ; This tests that emitting CodeView arrays doesn't assert when an ODR violation
2 ; makes our array dimension size calculations inaccurate. (PR32383)
4 ; Here was the scenario:
6 ; typedef union YYSTYPE { int x; } YYSTYPE;
9 ; typedef union YYSTYPE { char x; } YYSTYPE;
10 ; void fn1() { YYSTYPE a[1]; }
11 ; $ clang-cl -c -Zi -flto a.cpp b.cpp
12 ; $ llvm-link a.obj b.obj -S -o t.ll # This is the test case IR.
13 ; $ llc t.ll # Used to assert
15 ; RUN: llc < %s | FileCheck %s
17 ; FIXME: sizeof(a) in the user program is 1, but we claim it is 4 because
18 ; sometimes the frontend lies to us. See array-types-advanced.ll for an example.
20 ; CHECK: # Array (0x1004)
21 ; CHECK: .short 0xe # Record length
22 ; CHECK: .short 0x1503 # Record kind: LF_ARRAY
23 ; CHECK: .long 0x1003 # ElementType: YYSTYPE
24 ; CHECK: .long 0x23 # IndexType: unsigned __int64
25 ; CHECK: .short 0x4 # SizeOf
26 ; CHECK: .byte 0 # Name
29 ; CHECK: # Union (0x1006)
30 ; CHECK: .short 0x22 # Record length
31 ; CHECK: .short 0x1506 # Record kind: LF_UNION
32 ; CHECK: .short 0x1 # MemberCount
33 ; CHECK: .short 0x600 # Properties ( HasUniqueName (0x200) | Sealed (0x400) )
34 ; CHECK: .long 0x1005 # FieldList: <field list>
35 ; CHECK: .short 0x4 # SizeOf
36 ; CHECK: .asciz "YYSTYPE" # Name
37 ; CHECK: .asciz ".?ATYYSTYPE@@" # LinkageName
39 ; ModuleID = 'llvm-link'
40 source_filename = "llvm-link"
41 target datalayout = "e-m:w-i64:64-f80:128-n8:16:32:64-S128"
42 target triple = "x86_64-pc-windows-msvc19.10.24728"
44 %union.YYSTYPE = type { i32 }
45 %union.YYSTYPE.0 = type { i8 }
47 @"\01?a@@3TYYSTYPE@@A" = global %union.YYSTYPE zeroinitializer, align 4, !dbg !0
49 ; Function Attrs: noinline nounwind sspstrong uwtable
50 define void @"\01?fn1@@YAXXZ"() #0 !dbg !21 {
52 %a = alloca [1 x %union.YYSTYPE.0], align 1
53 call void @llvm.dbg.declare(metadata [1 x %union.YYSTYPE.0]* %a, metadata !24, metadata !29), !dbg !30
57 ; Function Attrs: nounwind readnone
58 declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
60 attributes #0 = { noinline nounwind sspstrong uwtable "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+fxsr,+mmx,+sse,+sse2,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" }
61 attributes #1 = { nounwind readnone }
63 !llvm.dbg.cu = !{!2, !11}
64 !llvm.ident = !{!13, !13}
65 !llvm.module.flags = !{!18, !19, !20}
67 !0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
68 !1 = distinct !DIGlobalVariable(name: "a", linkageName: "\01?a@@3TYYSTYPE@@A", scope: !2, file: !3, line: 2, type: !6, isLocal: false, isDefinition: true)
69 !2 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !3, producer: "clang version 5.0.0 ", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5)
70 !3 = !DIFile(filename: "a.cpp", directory: "C:\5Csrc\5Cllvm-project\5Cbuild", checksumkind: CSK_MD5, checksum: "c0005139aa3df153c30d8c6953390a4b")
73 !6 = !DIDerivedType(tag: DW_TAG_typedef, name: "YYSTYPE", file: !3, line: 1, baseType: !7)
74 !7 = distinct !DICompositeType(tag: DW_TAG_union_type, name: "YYSTYPE", file: !3, line: 1, size: 32, elements: !8, identifier: ".?ATYYSTYPE@@")
76 !9 = !DIDerivedType(tag: DW_TAG_member, name: "x", scope: !7, file: !3, line: 1, baseType: !10, size: 32)
77 !10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
78 !11 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !12, producer: "clang version 5.0.0 ", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !4)
79 !12 = !DIFile(filename: "b.cpp", directory: "C:\5Csrc\5Cllvm-project\5Cbuild", checksumkind: CSK_MD5, checksum: "9cfd390d8827beab36769147bb037abc")
80 !13 = !{!"clang version 5.0.0 "}
81 !18 = !{i32 2, !"CodeView", i32 1}
82 !19 = !{i32 2, !"Debug Info Version", i32 3}
83 !20 = !{i32 1, !"PIC Level", i32 2}
84 !21 = distinct !DISubprogram(name: "fn1", linkageName: "\01?fn1@@YAXXZ", scope: !12, file: !12, line: 2, type: !22, isLocal: false, isDefinition: true, scopeLine: 2, flags: DIFlagPrototyped, isOptimized: false, unit: !11, retainedNodes: !4)
85 !22 = !DISubroutineType(types: !23)
87 !24 = !DILocalVariable(name: "a", scope: !21, file: !12, line: 2, type: !25)
88 !25 = !DICompositeType(tag: DW_TAG_array_type, baseType: !26, size: 8, elements: !27)
89 !26 = !DIDerivedType(tag: DW_TAG_typedef, name: "YYSTYPE", file: !12, line: 1, baseType: !7)
91 !28 = !DISubrange(count: 1)
93 !30 = !DILocation(line: 2, scope: !21)