| ; 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 |