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1; RUN: opt -S -passes=globalopt < %s | FileCheck %s2; Generated at -O2 -g from:3; typedef struct {4; } a;5; static struct {6; long b;7; a c;8; } d;9; e() {10; long f = d.b + 1;11; d.b = f;12; }13; (with some simplification by hand)14 15; Check that the global variable "d" is not16; emitted as a fragment after the member "c"17; is removed.18; d.b is referenced, but d.c has zero length.19; So a fragment covering d.b would be the same20; size as d itself.21 22source_filename = "pr45335.c"23target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"24target triple = "x86_64-unknown-linux-gnu"25 26%struct.anon = type { i64, %struct.a }27%struct.a = type {}28 29; CHECK: @d.0 = internal unnamed_addr global i64 0, align 8, !dbg ![[GVE:.*]]30@d = internal global %struct.anon zeroinitializer, align 8, !dbg !031 32; Function Attrs: noinline nounwind uwtable33define dso_local i32 @e() #0 !dbg !18 {34entry:35 %0 = load i64, ptr @d, align 836 %add = add nsw i64 %0, 137 call void @llvm.dbg.value(metadata i64 %add, metadata !24, metadata !DIExpression()), !dbg !2538 store i64 %add, ptr @d, align 839 ret i32 undef40}41 42; Function Attrs: nounwind readnone speculatable willreturn43declare void @llvm.dbg.declare(metadata, metadata, metadata)44 45; Function Attrs: nounwind readnone speculatable willreturn46declare void @llvm.dbg.value(metadata, metadata, metadata)47 48!llvm.dbg.cu = !{!2}49!llvm.module.flags = !{!14, !15}50 51; CHECK: ![[GVE]] = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())52!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())53!1 = distinct !DIGlobalVariable(name: "d", scope: !2, file: !3, line: 6, type: !7, isLocal: true, isDefinition: true)54!2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !{}, globals: !{!0}, splitDebugInlining: false, nameTableKind: None)55!3 = !DIFile(filename: "pr45335.c", directory: "/")56!7 = distinct !DICompositeType(tag: DW_TAG_structure_type, file: !3, line: 3, size: 64, elements: !8)57!8 = !{!9, !11}58!9 = !DIDerivedType(tag: DW_TAG_member, name: "b", scope: !7, file: !3, line: 4, baseType: !10, size: 64)59!10 = !DIBasicType(name: "long int", size: 64, encoding: DW_ATE_signed)60!11 = !DIDerivedType(tag: DW_TAG_member, name: "c", scope: !7, file: !3, line: 5, baseType: !12, offset: 64)61!12 = !DIDerivedType(tag: DW_TAG_typedef, name: "a", file: !3, line: 2, baseType: !13)62!13 = distinct !DICompositeType(tag: DW_TAG_structure_type, file: !3, line: 1, elements: !{})63!14 = !{i32 7, !"Dwarf Version", i32 4}64!15 = !{i32 2, !"Debug Info Version", i32 3}65!18 = distinct !DISubprogram(name: "e", scope: !3, file: !3, line: 7, type: !19, scopeLine: 7, spFlags: DISPFlagDefinition, unit: !2, retainedNodes: !{})66!19 = !DISubroutineType(types: !{!21})67!21 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)68!24 = !DILocalVariable(name: "f", scope: !18, file: !3, line: 8, type: !10)69!25 = !DILocation(line: 0, scope: !18)70