; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 4
; RUN: llc -mtriple=x86_64-pc-windows-msvc -mcpu=corei7 < %s | FileCheck %s

; Non-volatile registers are used to pass the first few parameters.
declare void @boring()
declare preserve_nonecc void @continuation(ptr, ptr, ptr, ptr, ptr, ptr)
define preserve_nonecc void @entry(ptr %r12, ptr %r13, ptr %r14, ptr %r15, ptr %rdi, ptr %rsi) {
; CHECK-LABEL: entry:
; CHECK:       # %bb.0:
; CHECK-NEXT:    subq $40, %rsp
; CHECK-NEXT:    .seh_stackalloc 40
; CHECK-NEXT:    .seh_endprologue
; CHECK-NEXT:    callq boring
; CHECK-NEXT:    nop
; CHECK-NEXT:    .seh_startepilogue
; CHECK-NEXT:    addq $40, %rsp
; CHECK-NEXT:    .seh_endepilogue
; CHECK-NEXT:    jmp continuation # TAILCALL
; CHECK-NEXT:    .seh_endproc
  call void @boring()
  musttail call preserve_nonecc void @continuation(ptr %r12, ptr %r13, ptr %r14, ptr %r15, ptr %rdi, ptr %rsi)
  ret void
}