1; RUN: opt -S -globalopt < %s | FileCheck %s 2; 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 not 16; 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 same 20; 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 !0 31 32; Function Attrs: noinline nounwind uwtable 33define dso_local i32 @e() #0 !dbg !18 { 34entry: 35 %0 = load i64, i64* getelementptr inbounds (%struct.anon, %struct.anon* @d, i32 0, i32 0), align 8 36 %add = add nsw i64 %0, 1 37 call void @llvm.dbg.value(metadata i64 %add, metadata !24, metadata !DIExpression()), !dbg !25 38 store i64 %add, i64* getelementptr inbounds (%struct.anon, %struct.anon* @d, i32 0, i32 0), align 8 39 ret i32 undef 40} 41 42; Function Attrs: nounwind readnone speculatable willreturn 43declare void @llvm.dbg.declare(metadata, metadata, metadata) 44 45; Function Attrs: nounwind readnone speculatable willreturn 46declare 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