
# RUN: llc -mtriple=aarch64-none-linux-gnu -run-pass aarch64-ldst-opt  -verify-machineinstrs  -o - %s | FileCheck %s

--- |
  define i1 @no-clobber-zr(i64* %p, i64 %x) { ret i1 0 }
...
---
# Check that write of xzr doesn't inhibit pairing of xzr stores since
# it isn't actually clobbered.  Written as a MIR test to avoid
# schedulers reordering instructions such that SUBS doesn't appear
# between stores.
# CHECK-LABEL: name: no-clobber-zr
# CHECK: STPXi %xzr, %xzr, %x0, 0
name: no-clobber-zr
body: |
  bb.0:
    liveins: %x0,  %x1
    STRXui %xzr, %x0, 0 :: (store 8 into %ir.p)
    dead %xzr = SUBSXri killed %x1, 0, 0, implicit-def %nzcv
    %w8 = CSINCWr %wzr, %wzr, 1, implicit killed %nzcv
    STRXui %xzr, killed %x0, 1 :: (store 8 into %ir.p)
    %w0 = ORRWrs %wzr, killed %w8, 0
    RET %lr, implicit %w0
...