| ; Test that linkonce_odr and weak_odr variables which are visible to regular |
| ; object (and so are not readonly) are not internalized by thin LTO. |
| ; RUN: opt -module-summary %s -o %t.bc |
| ; RUN: llvm-lto2 run -save-temps %t.bc -o %t.out \ |
| ; RUN: -r=%t.bc,_ZL5initSv,plx \ |
| ; RUN: -r=%t.bc,_ZN9SingletonI1SE11getInstanceEv,lx \ |
| ; RUN: -r=%t.bc,_ZZN9SingletonI1SE11getInstanceEvE8instance,lx \ |
| ; RUN: -r=%t.bc,_ZZN9SingletonI1SE11getInstanceEvE13instance_weak,lx |
| ; RUN: llvm-dis %t.out.1.1.promote.bc -o - | FileCheck %s |
| ; RUN: llvm-dis %t.out.1.2.internalize.bc -o - | FileCheck %s --check-prefix=INTERNALIZE |
| |
| ; CHECK: @_ZZN9SingletonI1SE11getInstanceEvE8instance = available_externally dso_local global %struct.S zeroinitializer |
| ; CHECK: @_ZZN9SingletonI1SE11getInstanceEvE13instance_weak = available_externally dso_local global ptr null, align 8 |
| |
| ;; We should not internalize a linkonce_odr function when the IR definition(s) |
| ;; are not prevailing (prevailing def in native object). This can break function |
| ;; pointer equality (unless it has an unnamed_addr attribute indicating that the |
| ;; address is not significant), and also can increase code size. |
| ; CHECK: define available_externally dso_local dereferenceable(16) ptr @_ZN9SingletonI1SE11getInstanceEv() |
| ; INTERNALIZE: define available_externally dso_local dereferenceable(16) ptr @_ZN9SingletonI1SE11getInstanceEv() |
| |
| target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128" |
| target triple = "x86_64-unknown-linux-gnu" |
| |
| %struct.S = type { i64, i64 } |
| |
| $_ZN9SingletonI1SE11getInstanceEv = comdat any |
| |
| $_ZZN9SingletonI1SE11getInstanceEvE8instance = comdat any |
| |
| $_ZZN9SingletonI1SE11getInstanceEvE13instance_weak = comdat any |
| |
| @_ZZN9SingletonI1SE11getInstanceEvE8instance = linkonce_odr dso_local global %struct.S zeroinitializer, comdat, align 8 |
| |
| @_ZZN9SingletonI1SE11getInstanceEvE13instance_weak = weak_odr dso_local global ptr null, comdat, align 8 |
| |
| define dso_local void @_ZL5initSv() { |
| %1 = call dereferenceable(16) ptr @_ZN9SingletonI1SE11getInstanceEv() |
| store ptr %1, ptr @_ZZN9SingletonI1SE11getInstanceEvE13instance_weak |
| store i64 1, ptr %1, align 8 |
| ret void |
| } |
| |
| define linkonce_odr dso_local dereferenceable(16) ptr @_ZN9SingletonI1SE11getInstanceEv() #0 comdat align 2 { |
| ret ptr @_ZZN9SingletonI1SE11getInstanceEvE8instance |
| } |
| |