test/ThinLTO/X86/linkonce_odr_unnamed_addr.ll

; This test ensures that when linkonce_odr + unnamed_addr symbols promoted to
; weak symbols, it preserves the auto hide property when possible.

; RUN: opt -module-summary %s -o %t.bc
; RUN: opt -module-summary %p/Inputs/linkonce_odr_unnamed_addr.ll -o %t2.bc
; Check old LTO API
; RUN: llvm-lto -thinlto-action=thinlink -o %t3.bc %t.bc %t2.bc
; RUN: llvm-lto -thinlto-action=promote %t.bc -thinlto-index=%t3.bc -o - | llvm-dis -o - | FileCheck %s
; Check new LTO API
; RUN: llvm-lto2 run -save-temps -o %t6.bc %t.bc %t2.bc -r=%t.bc,linkonceodrunnamed,p -r=%t.bc,odrunnamed,p -r=%t2.bc,linkonceodrunnamed, -r=%t2.bc,odrunnamed,
; RUN: llvm-dis %t6.bc.1.1.promote.bc -o - | FileCheck %s

; Now test when one module does not have a summary. In that case we must be
; conservative and not auto hide.
; RUN: opt %p/Inputs/linkonce_odr_unnamed_addr.ll -o %t4.bc
; Check new LTO API (old LTO API does not detect this case).
; RUN: llvm-lto2 run -save-temps -o %t6.bc %t.bc %t4.bc -r=%t.bc,linkonceodrunnamed,p -r=%t.bc,odrunnamed,p -r=%t4.bc,linkonceodrunnamed, -r=%t4.bc,odrunnamed,
; RUN: llvm-dis %t6.bc.1.1.promote.bc -o - | FileCheck %s --check-prefix=NOSUMMARY

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-grtev4-linux-gnu"

; In this case all copies are linkonce_odr, so it may be hidden.
; CHECK: @linkonceodrunnamed = weak_odr hidden unnamed_addr constant i32 0
; NOSUMMARY: @linkonceodrunnamed = weak_odr unnamed_addr constant i32 0
@linkonceodrunnamed = linkonce_odr unnamed_addr constant i32 0

; In this case, the other copy was weak_odr, so it may not be hidden.
; CHECK: @odrunnamed = weak_odr unnamed_addr constant i32 0
; NOSUMMARY: @odrunnamed = weak_odr unnamed_addr constant i32 0
@odrunnamed = linkonce_odr unnamed_addr constant i32 0