File: stacksave-restore.ll

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llvm-toolchain-20 1%3A20.1.8-1
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; RUN: llc -O0 < %s -mtriple=avr | FileCheck %s

; CHECK-LABEL: foo
define void @foo() {
entry:
  br label %save

; CHECK-LABEL: save
; CHECK: in [[SREG1:r[0-9]+]], 61
; CHECK-NEXT: in [[SREG2:r[0-9]+]], 62
save:
  %saved = call ptr @llvm.stacksave()
  br label %restore

; CHECK-LABEL: restore
; CHECK: in r0, 63
; CHECK-NEXT: cli
; CHECK-NEXT: out 62, [[SREG2]]
; CHECK-NEXT: out 63, r0
; CHECK-NEXT: out 61, [[SREG1]]
restore:
  call void @llvm.stackrestore(ptr %saved)
  ret void
}

declare ptr @llvm.stacksave()
declare void @llvm.stackrestore(ptr %ptr)