# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
# RUN: llc --mtriple=x86_64-linux-gnu -run-pass=x86-return-thunks \
# RUN:   -verify-machineinstrs %s -o - | FileCheck %s
--- |
  ; ModuleID = 'y.ll'
  source_filename = "y.ll"
  target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"

  define void @x() #0 {
    ret void
  }

  attributes #0 = { fn_ret_thunk_extern }

...
---
name:            x
alignment:       16
exposesReturnsTwice: false
legalized:       false
regBankSelected: false
selected:        false
failedISel:      false
tracksRegLiveness: true
hasWinCFI:       false
failsVerification: false
tracksDebugUserValues: true
registers:       []
liveins:         []
frameInfo:
  isFrameAddressTaken: false
  isReturnAddressTaken: false
  hasStackMap:     false
  hasPatchPoint:   false
  stackSize:       0
  offsetAdjustment: 0
  maxAlignment:    1
  adjustsStack:    false
  hasCalls:        false
  stackProtector:  ''
  maxCallFrameSize: 0
  cvBytesOfCalleeSavedRegisters: 0
  hasOpaqueSPAdjustment: false
  hasVAStart:      false
  hasMustTailInVarArgFunc: false
  hasTailCall:     false
  localFrameSize:  0
  savePoint:       ''
  restorePoint:    ''
fixedStack:      []
stack:           []
callSites:       []
debugValueSubstitutions: []
constants:       []
machineFunctionInfo: {}
body:             |
  bb.0 (%ir-block.0):
    ; CHECK-LABEL: name: x
    ; CHECK: TAILJMPd &__x86_return_thunk, implicit $esp, implicit $ssp
    RET64

...