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llvm-project/llvm/test/ThinLTO/X86/linkonce_odr_unnamed_addr.ll

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[ThinLTO] Teach ThinLTO about auto hide symbols Summary: For symbols that has linkonce_odr linkage and unnamed_addr, it can be auto hide by linker to avoid weak external symbols. Teach ThinLTO to perform auto hide so it can safely promote linkonce_odr to weak symbols without breaking this nice property. Reviewers: tejohnson, mehdi_amini Reviewed By: tejohnson Subscribers: inglorion, eraman, rnk, pcc, llvm-commits Differential Revision: https://reviews.llvm.org/D43130 llvm-svn: 324757
2018-02-10 02:34:08 +08:00
; This test ensures that when linkonce_odr + unnamed_addr symbols promoted to
; weak symbols, it preserves the auto hide property.
; RUN: opt -module-summary %s -o %t.bc
; RUN: opt -module-summary %s -o %t2.bc
; 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: @linkonceodrunnamed = weak_odr hidden unnamed_addr constant i32 0
@linkonceodrunnamed = linkonce_odr unnamed_addr constant i32 0