Index: lib/LTO/LTO.cpp =================================================================== --- lib/LTO/LTO.cpp +++ lib/LTO/LTO.cpp @@ -82,10 +82,6 @@ isPrevailing, function_ref recordNewLinkage) { - if (Index.modulePaths().size() == 1) - // Nothing to do if we don't have multiple modules - return; - // We won't optimize the globals that are referenced by an alias for now // Ideally we should turn the alias into a global and duplicate the definition // when needed. Index: test/ThinLTO/X86/weak_resolution_single.ll =================================================================== --- /dev/null +++ test/ThinLTO/X86/weak_resolution_single.ll @@ -0,0 +1,9 @@ +; RUN: opt -module-summary %s -o %t.bc +; RUN: llvm-lto -thinlto-action=thinlink -o %t2.bc %t.bc + +; RUN: llvm-lto -thinlto-action=promote-internalize %t.bc -thinlto-index=%t2.bc -exported-symbol=foo -o - | llvm-dis -o - | FileCheck %s + +; CHECK: define weak_odr void @foo() +define linkonce_odr void @foo() { + ret void +}