1 ; RUN: opt -S -passes=globalopt < %s | FileCheck %s
2 ; Generated at -O2 -g from:
12 ; (IR is modified so that d's struct type is forward declared.)
14 ; Check that the global variable "d" is not
15 ; emitted as a fragment if its struct type is
16 ; forward declared but d.c has zero length, so
17 ; a fragment shouldn't be emitted.
19 source_filename = "t.c"
20 target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
21 target triple = "x86_64-unknown-linux-gnu"
23 %struct.anon = type { i64, %struct.a }
26 ; CHECK: @d.0 = internal unnamed_addr global i64 0, align 8, !dbg ![[GVE:.*]]
27 @d = internal global %struct.anon zeroinitializer, align 8, !dbg !0
29 ; Function Attrs: noinline nounwind uwtable
30 define dso_local i32 @e() #0 !dbg !18 {
32 %0 = load i64, ptr @d, align 8
33 %add = add nsw i64 %0, 1
34 call void @llvm.dbg.value(metadata i64 %add, metadata !24, metadata !DIExpression()), !dbg !25
35 store i64 %add, ptr @d, align 8
39 ; Function Attrs: nounwind readnone speculatable willreturn
40 declare void @llvm.dbg.declare(metadata, metadata, metadata)
42 ; Function Attrs: nounwind readnone speculatable willreturn
43 declare void @llvm.dbg.value(metadata, metadata, metadata)
46 !llvm.module.flags = !{!14, !15}
48 ; CHECK: ![[GVE]] = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
49 !0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
50 !1 = distinct !DIGlobalVariable(name: "d", scope: !2, file: !3, line: 6, type: !7, isLocal: true, isDefinition: true)
51 !2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !{}, globals: !{!0}, splitDebugInlining: false, nameTableKind: None)
52 !3 = !DIFile(filename: "t.c", directory: "/")
53 !7 = distinct !DICompositeType(tag: DW_TAG_structure_type, file: !3, line: 3, flags: DIFlagFwdDecl)
54 !10 = !DIBasicType(name: "long int", size: 64, encoding: DW_ATE_signed)
55 !12 = !DIDerivedType(tag: DW_TAG_typedef, name: "a", file: !3, line: 2, baseType: !13)
56 !13 = distinct !DICompositeType(tag: DW_TAG_structure_type, file: !3, line: 1, elements: !{})
57 !14 = !{i32 7, !"Dwarf Version", i32 4}
58 !15 = !{i32 2, !"Debug Info Version", i32 3}
59 !18 = distinct !DISubprogram(name: "e", scope: !3, file: !3, line: 7, type: !19, scopeLine: 7, spFlags: DISPFlagDefinition, unit: !2, retainedNodes: !{})
60 !19 = !DISubroutineType(types: !{!21})
61 !21 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
62 !24 = !DILocalVariable(name: "f", scope: !18, file: !3, line: 8, type: !10)
63 !25 = !DILocation(line: 0, scope: !18)