Index: llvm/lib/LTO/LTO.cpp =================================================================== --- llvm/lib/LTO/LTO.cpp +++ llvm/lib/LTO/LTO.cpp @@ -871,8 +871,9 @@ GlobalValue *GV = RegularLTO.CombinedModule->getNamedValue(R.second.IRName); - // Ignore symbols defined in other partitions. - if (!GV || GV->hasLocalLinkage()) + // Ignore and symbols defined in other partitions. + // Also skip declarations, which are not allowed to have internal linkage. + if (!GV || GV->hasLocalLinkage() || GV->isDeclaration()) continue; GV->setUnnamedAddr(R.second.UnnamedAddr ? GlobalValue::UnnamedAddr::Global : GlobalValue::UnnamedAddr::None); Index: llvm/test/LTO/X86/pr38046.ll =================================================================== --- /dev/null +++ llvm/test/LTO/X86/pr38046.ll @@ -0,0 +1,34 @@ +; RUN: opt -module-summary -o %t.o %s +; RUN: llvm-lto2 run -save-temps -o %t.lto.o %t.o \ +; RUN: -r=%t.o,foo,plx \ +; RUN: -r=%t.o,get,pl +; RUN: llvm-dis %t.lto.o.0.2.internalize.bc >/dev/null 2>%t.dis.stderr || true +; RUN: FileCheck -allow-empty %s < %t.dis.stderr + +; CHECK-NOT: Global is external, but doesn't have external or weak linkage + +target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" +target triple = "x86_64-unknown-linux-gnu" + +define i32 @foo() { + call void @llvm.dbg.value(metadata i32 ()* @get, metadata !7, metadata !DIExpression()), !dbg !DILocation(scope: !6) + ret i32 0 +} + +define i32 @get() { + ret i32 0 +} + +declare void @llvm.dbg.value(metadata, metadata, metadata) + +!llvm.dbg.cu = !{!0} +!llvm.module.flags = !{!2, !3, !4, !5} + +!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1) +!1 = !DIFile(filename: "t.cc", directory: "/tmp/t") +!2 = !{i32 2, !"Dwarf Version", i32 4} +!3 = !{i32 2, !"Debug Info Version", i32 3} +!4 = !{i32 1, !"wchar_size", i32 4} +!5 = !{i32 1, !"ThinLTO", i32 0} +!6 = distinct !DISubprogram(unit: !0) +!7 = !DILocalVariable(name: "get", scope: !6)