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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 ptr @rt0() norecurse nounwind readnone {
entry:
; CHECK-LABEL: rt0:
; CHECK: lgr %r2, %r14
; CHECK: br %r14
%0 = tail call ptr @llvm.returnaddress(i32 0)
ret ptr %0
}
; Check the caller's return address.
define ptr @rtcaller() nounwind "backchain" {
entry:
; CHECK-LABEL: rtcaller:
; CHECK: lg %r1, 0(%r15)
; CHECK lg %r2, 112(%r1)
; CHECK: br %r14
%0 = tail call ptr @llvm.returnaddress(i32 1)
ret ptr %0
}
; Check the caller's caller's return address.
define ptr @rtcallercaller() nounwind "backchain" {
entry:
; CHECK-LABEL: rtcallercaller:
; CHECK: lg %r1, 0(%r15)
; CHECK: lg %r1, 0(%r1)
; CHECK lg %r2, 112(%r1)
; CHECK: br %r14
%0 = tail call ptr @llvm.returnaddress(i32 2)
ret ptr %0
}
declare ptr @llvm.returnaddress(i32) nounwind readnone
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