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1; RUN: opt -S -passes=globalopt < %s | FileCheck %s2; Generated at -O2 -g from:3; typedef struct {} a;4; static struct {5; long b;6; a c;7; } d;8; e() {9; long f = d.b + 1;10; d.b = f;11; }12; (IR is modified so that d's struct type is forward declared.)13 14; Check that the global variable "d" is not15; emitted as a fragment if its struct type is16; forward declared but d.c has zero length, so17; a fragment shouldn't be emitted.18 19source_filename = "t.c"20target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"21target triple = "x86_64-unknown-linux-gnu"22 23%struct.anon = type { i64, %struct.a }24%struct.a = type {}25 26; CHECK: @d.0 = internal unnamed_addr global i64 0, align 8, !dbg ![[GVE:.*]]27@d = internal global %struct.anon zeroinitializer, align 8, !dbg !028 29; Function Attrs: noinline nounwind uwtable30define dso_local i32 @e() #0 !dbg !18 {31entry:32 %0 = load i64, ptr @d, align 833 %add = add nsw i64 %0, 134 call void @llvm.dbg.value(metadata i64 %add, metadata !24, metadata !DIExpression()), !dbg !2535 store i64 %add, ptr @d, align 836 ret i32 undef37}38 39; Function Attrs: nounwind readnone speculatable willreturn40declare void @llvm.dbg.declare(metadata, metadata, metadata)41 42; Function Attrs: nounwind readnone speculatable willreturn43declare void @llvm.dbg.value(metadata, metadata, metadata)44 45!llvm.dbg.cu = !{!2}46!llvm.module.flags = !{!14, !15}47 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)64