llvm/test/ThinLTO/X86/weak_resolution_single.ll
Peter Collingbourne b821e278a9 ThinLTO: Remove check for multiple modules before applying weak resolutions.
This check is not only unnecessary, it can produce the wrong result. If we
are linking a single module and it has an exported linkonce symbol, we need
to promote to weak in order to avoid PR19901-style problems.

Differential Revision: http://reviews.llvm.org/D21917

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@274722 91177308-0d34-0410-b5e6-96231b3b80d8
2016-07-07 01:51:11 +00:00

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LLVM

; RUN: opt -module-summary %s -o %t.bc
; RUN: llvm-lto -thinlto-action=thinlink -o %t2.bc %t.bc
; RUN: llvm-lto -thinlto-action=promote %t.bc -thinlto-index=%t2.bc -exported-symbol=foo -o - | llvm-lto -thinlto-action=internalize -thinlto-module-id=%t.bc - -thinlto-index=%t2.bc -exported-symbol=foo -o - | llvm-dis -o - | FileCheck %s
; CHECK: define weak_odr void @foo()
define linkonce_odr void @foo() {
ret void
}