39 lines
1,009 B
LLVM
39 lines
1,009 B
LLVM
; Test support for the llvm.returnaddress intrinsic with packed-stack.
|
|
|
|
; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
|
|
|
|
; The current function's return address is in the link register.
|
|
attributes #0 = { nounwind "packed-stack" "backchain" "use-soft-float"="true" }
|
|
define ptr @rt0() #0 {
|
|
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() #0 {
|
|
entry:
|
|
; CHECK-LABEL: rtcaller:
|
|
; CHECK: lg %r1, 152(%r15)
|
|
; CHECK lg %r2, 136(%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() #0 {
|
|
entry:
|
|
; CHECK-LABEL: rtcallercaller:
|
|
; CHECK: lg %r1, 152(%r15)
|
|
; CHECK: lg %r1, 152(%r1)
|
|
; CHECK lg %r2, 136(%r1)
|
|
; CHECK: br %r14
|
|
%0 = tail call ptr @llvm.returnaddress(i32 2)
|
|
ret ptr %0
|
|
}
|
|
|
|
declare ptr @llvm.returnaddress(i32) nounwind readnone
|