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; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
; The current function's frame address is the address of
; the optional back chain slot.
define ptr @fp0() nounwind {
entry:
; CHECK-LABEL: fp0:
; CHECK: la %r2, 0(%r15)
; CHECK: br %r14
%0 = tail call ptr @llvm.frameaddress(i32 0)
ret ptr %0
}
; Check that the frame address is correct in a presence
; of a stack frame.
define ptr @fp0f() nounwind {
entry:
; CHECK-LABEL: fp0f:
; CHECK: aghi %r15, -168
; CHECK: la %r2, 168(%r15)
; CHECK: aghi %r15, 168
; CHECK: br %r14
%0 = alloca i64, align 8
%1 = tail call ptr @llvm.frameaddress(i32 0)
ret ptr %1
}
; Check the caller's frame address.
define ptr @fpcaller() nounwind "backchain" {
entry:
; CHECK-LABEL: fpcaller:
; CHECK: lg %r2, 0(%r15)
; CHECK: br %r14
%0 = tail call ptr @llvm.frameaddress(i32 1)
ret ptr %0
}
; Check the caller's frame address.
define ptr @fpcallercaller() nounwind "backchain" {
entry:
; CHECK-LABEL: fpcallercaller:
; CHECK: lg %r1, 0(%r15)
; CHECK: lg %r2, 0(%r1)
; CHECK: br %r14
%0 = tail call ptr @llvm.frameaddress(i32 2)
ret ptr %0
}
declare ptr @llvm.frameaddress(i32) nounwind readnone
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