File: ret-addr-01.ll

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llvm-toolchain-9 1%3A9.0.1-16.1
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; Test support for the llvm.returnaddress intrinsic.
; 
; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s

; The current function's return address is in the link register.
define i8* @rt0() norecurse nounwind readnone {
entry:
; CHECK-LABEL: rt0:
; CHECK: lgr  %r2, %r14
; CHECK: br   %r14
  %0 = tail call i8* @llvm.returnaddress(i32 0)
  ret i8* %0
}

declare i8* @llvm.returnaddress(i32) nounwind readnone