test/CodeGen/AArch64/spill-stack-realignment.mir

# RUN: llc -mtriple=aarch64-none-linux-gnu -run-pass=prologepilog %s -o - | FileCheck %s

# Ensure references to scavenged stack slots in the CSR area use the
# FP as a base when the stack pointer must be aligned to something
# larger than required by the target. This is necessary because the
# alignment padding area is between the CSR area and the SP, so the SP
# cannot be used to reference the CSR area.
name:            test
tracksRegLiveness: true
frameInfo:
  maxAlignment:    64
# CHECK:      stack:
# CHECK:        id: 0, name: '', type: default, offset: -64, size: 4, alignment: 64
# CHECK-NEXT:     stack-id: 0
# CHECK-NEXT:     local-offset: -64
# CHECK:        id: 1, name: '', type: default, offset: -20, size: 4, alignment: 4
# CHECK-NEXT:     stack-id: 0
# CHECK-NEXT:     local-offset: -68
stack:
  - { id: 0, size: 4, alignment: 64, local-offset: -64 }
  - { id: 1, size: 4, alignment: 4, local-offset: -68 }

# CHECK: body:
# CHECK:   $sp = ANDXri killed ${{x[0-9]+}}, 7865
# CHECK:   STRSui $s0, $sp, 0
# CHECK:   STURSi $s0, $fp, -4
body:             |
  bb.0.entry:
    liveins: $s0

    STRSui $s0, %stack.0, 0
    STRSui $s0, %stack.1, 0
    ; Force preserve a CSR to create a hole in the CSR stack region.
    $x28 = IMPLICIT_DEF
    RET_ReallyLR