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c274ba2396
Summary: Some links were failing with "Global is external, but doesn't have external or weak linkage!" in ThinLTO builds with debug information. This happened when we elide the body of a global that is referenced by debug info. This results in a declaration, which we would then internalize - but declarations cannot be internal. This change avoids the problem by not internalizing these declarations. Fixes PR38046. Reviewers: pcc, tejohnson Subscribers: mehdi_amini, aprantl, hiraditya, JDevlieghere, steven_wu, dexonsmith, llvm-commits Differential Revision: https://reviews.llvm.org/D49777 llvm-svn: 338100
35 lines
1.1 KiB
LLVM
35 lines
1.1 KiB
LLVM
; RUN: opt -module-summary -o %t.o %s
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; RUN: llvm-lto2 run -save-temps -o %t.lto.o %t.o \
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; RUN: -r=%t.o,foo,plx \
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; RUN: -r=%t.o,get,pl
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; RUN: llvm-dis %t.lto.o.0.2.internalize.bc >/dev/null 2>%t.dis.stderr || true
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; RUN: FileCheck -allow-empty %s < %t.dis.stderr
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; CHECK-NOT: Global is external, but doesn't have external or weak linkage
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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define i32 @foo() {
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call void @llvm.dbg.value(metadata i32 ()* @get, metadata !7, metadata !DIExpression()), !dbg !DILocation(scope: !6)
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ret i32 0
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}
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define i32 @get() {
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ret i32 0
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}
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declare void @llvm.dbg.value(metadata, metadata, metadata)
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!2, !3, !4, !5}
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!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1)
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!1 = !DIFile(filename: "t.cc", directory: "/tmp/t")
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!2 = !{i32 2, !"Dwarf Version", i32 4}
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!3 = !{i32 2, !"Debug Info Version", i32 3}
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!4 = !{i32 1, !"wchar_size", i32 4}
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!5 = !{i32 1, !"ThinLTO", i32 0}
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!6 = distinct !DISubprogram(unit: !0)
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!7 = !DILocalVariable(name: "get", scope: !6)
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