llvm/test/CodeGen/ARM/const-load-align-thumb.mir

# RUN: llc -mtriple=arm-eabi -run-pass=arm-cp-islands %s -o - | FileCheck %s
--- |
  target datalayout = "e-m:e-p:32:32-Fi8-i64:64-v128:64:128-a:0:32-n32-S64"
  target triple = "thumbv8.2a-arm-none-eabi"

  define hidden i32 @main() {
  entry:
    %P5 = alloca half, align 2
    store half 0xH3FE0, ptr %P5, align 2
    %0 = load half, ptr %P5, align 2
    call void @z_bar(half %0)
    ret i32 0
  }

  declare dso_local void @z_bar(half)

...
---
name:            main
alignment:       2
tracksRegLiveness: true
frameInfo:
  stackSize:       16
  maxAlignment:    4
  adjustsStack:    true
  hasCalls:        true
  maxCallFrameSize: 0
  localFrameSize:  2
stack:
  - { id: 0, name: P5, offset: -10, size: 2, alignment: 2, local-offset: -2 }
  - { id: 1, type: spill-slot, offset: -4, size: 4, alignment: 4, callee-saved-register: '$lr',
      callee-saved-restored: false }
  - { id: 2, type: spill-slot, offset: -8, size: 4, alignment: 4, callee-saved-register: '$r7' }
constants:
  - id:              0
    value:           half 0xH3FE0
    alignment:       2
machineFunctionInfo: {}
body:             |
  bb.0.entry:
    liveins: $r7, $lr

    frame-setup tPUSH 14 /* CC::al */, $noreg, killed $r7, killed $lr, implicit-def $sp, implicit $sp
    frame-setup CFI_INSTRUCTION def_cfa_offset 8
    frame-setup CFI_INSTRUCTION offset $lr, -4
    frame-setup CFI_INSTRUCTION offset $r7, -8
    $sp = frame-setup tSUBspi $sp, 2, 14 /* CC::al */, $noreg
    frame-setup CFI_INSTRUCTION def_cfa_offset 16
    renamable $s0 = VLDRH %const.0, 0, 14, $noreg :: (load (s16) from constant-pool)
    VSTRH killed renamable $s0, $sp, 3, 14, $noreg :: (store (s16) into %ir.P5)
    renamable $r0 = t2LDRHi12 $sp, 6, 14 /* CC::al */, $noreg :: (dereferenceable load (s16) from %ir.P5)
    tBL 14 /* CC::al */, $noreg, @z_bar, csr_aapcs, implicit-def dead $lr, implicit $sp, implicit killed $r0, implicit-def $sp
    renamable $r0, dead $cpsr = tMOVi8 0, 14 /* CC::al */, $noreg
    $sp = frame-destroy tADDspi $sp, 2, 14 /* CC::al */, $noreg
    frame-destroy tPOP_RET 14 /* CC::al */, $noreg, def $r7, def $pc, implicit killed $r0

  ; CHECK: name:            main
  ; CHECK-NEXT: alignment:       4
...