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64 lines
2.8 KiB
64 lines
2.8 KiB
4 months ago
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; RUN: opt -S -globalopt < %s | FileCheck %s
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; Generated at -O2 -g from:
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; typedef struct {} a;
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; static struct {
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; long b;
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; a c;
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; } d;
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; e() {
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; long f = d.b + 1;
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; d.b = f;
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; }
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; (IR is modified so that d's struct type is forward declared.)
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; Check that the global variable "d" is not
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; emitted as a fragment if its struct type is
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; forward declared but d.c has zero length, so
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; a fragment shouldn't be emitted.
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source_filename = "t.c"
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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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%struct.anon = type { i64, %struct.a }
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%struct.a = type {}
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; CHECK: @d.0 = internal unnamed_addr global i64 0, align 8, !dbg ![[GVE:.*]]
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@d = internal global %struct.anon zeroinitializer, align 8, !dbg !0
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; Function Attrs: noinline nounwind uwtable
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define dso_local i32 @e() #0 !dbg !18 {
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entry:
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%0 = load i64, i64* getelementptr inbounds (%struct.anon, %struct.anon* @d, i32 0, i32 0), align 8
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%add = add nsw i64 %0, 1
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call void @llvm.dbg.value(metadata i64 %add, metadata !24, metadata !DIExpression()), !dbg !25
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store i64 %add, i64* getelementptr inbounds (%struct.anon, %struct.anon* @d, i32 0, i32 0), align 8
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ret i32 undef
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}
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; Function Attrs: nounwind readnone speculatable willreturn
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declare void @llvm.dbg.declare(metadata, metadata, metadata)
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; Function Attrs: nounwind readnone speculatable willreturn
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declare void @llvm.dbg.value(metadata, metadata, metadata)
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!llvm.dbg.cu = !{!2}
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!llvm.module.flags = !{!14, !15}
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; CHECK: ![[GVE]] = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
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!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
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!1 = distinct !DIGlobalVariable(name: "d", scope: !2, file: !3, line: 6, type: !7, isLocal: true, isDefinition: true)
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!2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !{}, globals: !{!0}, splitDebugInlining: false, nameTableKind: None)
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!3 = !DIFile(filename: "t.c", directory: "/")
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!7 = distinct !DICompositeType(tag: DW_TAG_structure_type, file: !3, line: 3, flags: DIFlagFwdDecl)
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!10 = !DIBasicType(name: "long int", size: 64, encoding: DW_ATE_signed)
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!12 = !DIDerivedType(tag: DW_TAG_typedef, name: "a", file: !3, line: 2, baseType: !13)
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!13 = distinct !DICompositeType(tag: DW_TAG_structure_type, file: !3, line: 1, elements: !{})
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!14 = !{i32 7, !"Dwarf Version", i32 4}
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!15 = !{i32 2, !"Debug Info Version", i32 3}
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!18 = distinct !DISubprogram(name: "e", scope: !3, file: !3, line: 7, type: !19, scopeLine: 7, spFlags: DISPFlagDefinition, unit: !2, retainedNodes: !{})
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!19 = !DISubroutineType(types: !{!21})
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!21 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!24 = !DILocalVariable(name: "f", scope: !18, file: !3, line: 8, type: !10)
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!25 = !DILocation(line: 0, scope: !18)
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