llvm/test/CodeGen/AArch64/nest-register.ll

; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 5
; RUN: llc -disable-post-ra -verify-machineinstrs < %s -mtriple=aarch64-none-linux-gnu | FileCheck %s

; Tests that the 'nest' parameter attribute causes the relevant parameter to be
; passed in the right register.

define ptr @nest_receiver(ptr nest %arg) nounwind {
; CHECK-LABEL: nest_receiver:
; CHECK:       // %bb.0:
; CHECK-NEXT:    mov x0, x15
; CHECK-NEXT:    ret

  ret ptr %arg
}

define ptr @nest_caller(ptr %arg) nounwind {
; CHECK-LABEL: nest_caller:
; CHECK:       // %bb.0:
; CHECK-NEXT:    str x30, [sp, #-16]! // 8-byte Folded Spill
; CHECK-NEXT:    mov x15, x0
; CHECK-NEXT:    bl nest_receiver
; CHECK-NEXT:    ldr x30, [sp], #16 // 8-byte Folded Reload
; CHECK-NEXT:    ret

  %result = call ptr @nest_receiver(ptr nest %arg)
  ret ptr %result
}