llvm/llvm/test/CodeGen/AArch64/unreachable-emergency-spill-slot.mir

#RUN: llc -mtriple=aarch64-- -run-pass prologepilog %s -o - | FileCheck %s
# Check that we use the frame pointer to address the emergency spill slot.
# Using the base pointer will result in an assert with "Emergency spill slot is
# out of reach".
---
name: hugeStack
# CHECK-LABEL: name: hugeStack
tracksRegLiveness: true
frameInfo:
  localFrameSize:  256
stack:
  - { id: 0, type: variable-sized,  alignment: 1 }
  - { id: 1, name: '', size: 32761, alignment: 8 }
body: |
  bb.0:
    liveins: $x19, $x20, $x21, $x22, $x23, $x24, $x25, $x26, $x27, $x28

    STRXui undef $x8, %stack.0, 0
    ; CHECK: STRXui undef $x8, $fp, 0
    B %bb.1
  bb.1:
    liveins: $x19, $x20, $x21, $x22, $x23, $x24, $x25, $x26, $x27, $x28

    RET_ReallyLR implicit $x19, implicit $x20, implicit $x21, implicit $x22, implicit $x23, implicit $x24, implicit $x25, implicit $x26, implicit $x27, implicit $x28
...
---
name: fpDoesNotFit
# CHECK-LABEL: name: fpDoesNotFit
tracksRegLiveness: true
frameInfo:
  hasStackMap: true
# set to true to force hasFP to true.
stack:
  - { id: 0, name: '', size: 4096, alignment: 8 }
  - { id: 1, name: '', size: 32761, alignment: 8 }
body: |
  bb.0:
    STRXui undef $x8, %stack.0, -34
    ; Pick SP here. Picking FP will require scavenging a register.
    ; CHECK: STRXui undef $x8, $sp, 4062
    RET_ReallyLR