Index: lib/Analysis/ModuleSummaryAnalysis.cpp =================================================================== --- lib/Analysis/ModuleSummaryAnalysis.cpp +++ lib/Analysis/ModuleSummaryAnalysis.cpp @@ -321,6 +321,8 @@ TypeTestAssumeVCalls.takeVector(), TypeCheckedLoadVCalls.takeVector(), TypeTestAssumeConstVCalls.takeVector(), TypeCheckedLoadConstVCalls.takeVector()); + if (F.getAttributes().hasFnAttribute(Attribute::NoInline)) + FuncSummary->setNotEligibleToImport(); if (NonRenamableLocal) CantBePromoted.insert(F.getGUID()); Index.addGlobalValueSummary(F.getName(), std::move(FuncSummary)); Index: test/ThinLTO/X86/Inputs/noinline.ll =================================================================== --- test/ThinLTO/X86/Inputs/noinline.ll +++ test/ThinLTO/X86/Inputs/noinline.ll @@ -0,0 +1,15 @@ +target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" +target triple = "x86_64-pc-linux-gnu" + +define i32 @foo(i32) local_unnamed_addr #0 { + %2 = tail call fastcc i32 @bar(i32 %0) + ret i32 %2 +} + +define internal fastcc i32 @bar(i32) unnamed_addr { + %2 = shl i32 %0, 1 + %3 = add nsw i32 %2, 10 + ret i32 %3 +} + +attributes #0 = { noinline } Index: test/ThinLTO/X86/noinline.ll =================================================================== --- test/ThinLTO/X86/noinline.ll +++ test/ThinLTO/X86/noinline.ll @@ -0,0 +1,25 @@ +; This test checks that ThinLTO doesn't try to import noinline function +; which, when takes place, causes promotion of its callee. +; RUN: opt -module-summary %s -o %t1.bc +; RUN: opt -module-summary %p/Inputs/noinline.ll -o %t2.bc +; RUN: llvm-lto2 run %t1.bc %t2.bc -o %t3.o \ +; RUN: -r=%t1.bc,main,px \ +; RUN: -r=%t1.bc,foo, \ +; RUN: -r=%t2.bc,foo,p +; RUN: llvm-nm %t3.o.2 | FileCheck %s + +; CHECK-NOT: bar + +target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" +target triple = "x86_64-pc-linux-gnu" + +; Function Attrs: nounwind ssp uwtable +define i32 @main(i32, i8** nocapture readnone) local_unnamed_addr #0 { + %3 = tail call i32 @foo(i32 %0) #2 + ret i32 %3 +} + +declare i32 @foo(i32) local_unnamed_addr + +attributes #0 = { nounwind } +attributes #2 = { nounwind }