defsym.ll

; REQUIRES: x86
; LTO
; RUN: llvm-as %s -o %t.o
; RUN: llvm-as %S/Inputs/defsym-bar.ll -o %t1.o
; RUN: ld.lld %t.o %t1.o -shared -o %t.so -defsym=bar2=bar3 -save-temps
; RUN: llvm-readelf --symbols %t.so.lto.o | FileCheck --check-prefix=OBJ %s
; RUN: llvm-objdump -d %t.so | FileCheck %s

; ThinLTO
; RUN: opt -module-summary %s -o %t.o
; RUN: opt -module-summary %S/Inputs/defsym-bar.ll -o %t1.o
; RUN: ld.lld %t.o %t1.o -shared -o %t2.so -defsym=bar2=bar3 -save-temps
; RUN: llvm-readelf --symbols %t2.so1.lto.o | FileCheck --check-prefix=OBJ %s
; RUN: llvm-objdump -d %t2.so | FileCheck %s

; OBJ:  UND bar2

; Call to bar2() should not be inlined and should be routed to bar3()
; Symbol bar3 should not be eliminated

; CHECK:      foo:
; CHECK-NEXT: pushq %rax
; CHECK-NEXT: callq
; CHECK-NEXT: callq{{.*}}<bar3>
; CHECK-NEXT: popq %rax
; CHECK-NEXT: jmp

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"

declare void @bar1()
declare void @bar2()
declare void @bar3()

define void @foo() {
  call void @bar1()
  call void @bar2()
  call void @bar3()
  ret void
}