xref: /llvm-project/llvm/test/CodeGen/AArch64/stack-guard-reassign.mir (revision 1ee315ae7964c8433b772e0b5d667834994ba753) 
1# RUN: llc -mtriple=arm64-apple-ios -start-before=localstackalloc -stop-after=prologepilog -o - %s | FileCheck %s
2
3--- |
4  @__stack_chk_guard = external global ptr
5  define i32 @main(i32, ptr) {
6    %StackGuardSlot = alloca ptr
7    unreachable
8  }
9...
10---
11name:            main
12tracksRegLiveness: true
13frameInfo:
14# CHECK: stackSize: 544
15  stackProtector:  '%stack.0.StackGuardSlot'
16stack:
17  - { id: 0, name: StackGuardSlot, size: 8, alignment: 8, stack-id: default }
18# Verify that the offset assigned to the stack protector is at the top of the
19# frame, covering the locals.
20# CHECK:       - { id: 0, name: StackGuardSlot, type: default, offset: -24, size: 8,
21# CHECK-NEXT:      alignment: 8, stack-id: default, callee-saved-register: '', callee-saved-restored: true,
22# CHECK-NEXT:      local-offset: -8, debug-info-variable: '', debug-info-expression: '',
23# CHECK-NEXT:      debug-info-location: '' }
24  - { id: 1, size: 512, alignment: 1, stack-id: default }
25  - { id: 2, size: 4, alignment: 4, stack-id: default }
26body:             |
27  bb.0:
28    %25:gpr64common = LOAD_STACK_GUARD :: (dereferenceable invariant load (s64) from @__stack_chk_guard)
29    STRXui killed %25, %stack.0.StackGuardSlot, 0 :: (volatile store (s64) into %stack.0.StackGuardSlot)
30    %28:gpr64 = LDRXui %stack.0.StackGuardSlot, 0 :: (volatile load (s64) from %stack.0.StackGuardSlot)
31    %29:gpr64common = LOAD_STACK_GUARD :: (dereferenceable invariant load (s64) from @__stack_chk_guard)
32    RET_ReallyLR implicit undef $w0, implicit killed %28, implicit killed %29
33
34...
35