1; Test that linkonce_odr and weak_odr variables which are visible to regular 2; object (and so are not readonly) are not internalized by thin LTO. 3; RUN: opt -module-summary %s -o %t.bc 4; RUN: llvm-lto2 run -save-temps %t.bc -o %t.out \ 5; RUN: -r=%t.bc,_ZL5initSv,plx \ 6; RUN: -r=%t.bc,_ZN9SingletonI1SE11getInstanceEv,lx \ 7; RUN: -r=%t.bc,_ZZN9SingletonI1SE11getInstanceEvE8instance,lx \ 8; RUN: -r=%t.bc,_ZZN9SingletonI1SE11getInstanceEvE13instance_weak,lx 9; RUN: llvm-dis %t.out.1.1.promote.bc -o - | FileCheck %s 10; RUN: llvm-dis %t.out.1.2.internalize.bc -o - | FileCheck %s --check-prefix=INTERNALIZE 11 12; CHECK: @_ZZN9SingletonI1SE11getInstanceEvE8instance = available_externally dso_local global %struct.S zeroinitializer 13; CHECK: @_ZZN9SingletonI1SE11getInstanceEvE13instance_weak = available_externally dso_local global ptr null, align 8 14 15;; We should not internalize a linkonce_odr function when the IR definition(s) 16;; are not prevailing (prevailing def in native object). This can break function 17;; pointer equality (unless it has an unnamed_addr attribute indicating that the 18;; address is not significant), and also can increase code size. 19; CHECK: define available_externally dso_local dereferenceable(16) ptr @_ZN9SingletonI1SE11getInstanceEv() 20; INTERNALIZE: define available_externally dso_local dereferenceable(16) ptr @_ZN9SingletonI1SE11getInstanceEv() 21 22target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128" 23target triple = "x86_64-unknown-linux-gnu" 24 25%struct.S = type { i64, i64 } 26 27$_ZN9SingletonI1SE11getInstanceEv = comdat any 28 29$_ZZN9SingletonI1SE11getInstanceEvE8instance = comdat any 30 31$_ZZN9SingletonI1SE11getInstanceEvE13instance_weak = comdat any 32 33@_ZZN9SingletonI1SE11getInstanceEvE8instance = linkonce_odr dso_local global %struct.S zeroinitializer, comdat, align 8 34 35@_ZZN9SingletonI1SE11getInstanceEvE13instance_weak = weak_odr dso_local global ptr null, comdat, align 8 36 37define dso_local void @_ZL5initSv() { 38 %1 = call dereferenceable(16) ptr @_ZN9SingletonI1SE11getInstanceEv() 39 store ptr %1, ptr @_ZZN9SingletonI1SE11getInstanceEvE13instance_weak 40 store i64 1, ptr %1, align 8 41 ret void 42} 43 44define linkonce_odr dso_local dereferenceable(16) ptr @_ZN9SingletonI1SE11getInstanceEv() #0 comdat align 2 { 45 ret ptr @_ZZN9SingletonI1SE11getInstanceEvE8instance 46} 47 48