llvm/test/CodeGen/ARM/fpoffset_overflow.mir

# RUN: llc -o - %s -mtriple=thumbv7-- -run-pass=stack-protector -run-pass=prologepilog | FileCheck %s
---
# This should trigger an emergency spill in the register scavenger because the
# frame offset into the large argument is too large.
# CHECK-LABEL: name: func0
# CHECK: t2STRi12 killed [[SPILLED:\$r[0-9]+]], $sp, 0, 14, $noreg :: (store 4 into %stack.0)
# CHECK: [[SPILLED]] = t2ADDri killed $sp, 4096, 14, $noreg, $noreg
# CHECK: $sp = t2LDRi12 killed [[SPILLED]], 40, 14, $noreg :: (load 4)
# CHECK: [[SPILLED]] = t2LDRi12 $sp, 0, 14, $noreg :: (load 4 from %stack.0)
name: func0
tracksRegLiveness: true
fixedStack:
  - { id: 0, offset: 4084, size: 4, alignment: 4, isImmutable: true,
      isAliased: false }
  - { id: 1, offset: -12, size: 4096, alignment: 4, isImmutable: false,
      isAliased: false }
body: |
  bb.0:
    $r0 = IMPLICIT_DEF
    $r1 = IMPLICIT_DEF
    $r2 = IMPLICIT_DEF
    $r3 = IMPLICIT_DEF
    $r4 = IMPLICIT_DEF
    $r5 = IMPLICIT_DEF
    $r6 = IMPLICIT_DEF
    $r7 = IMPLICIT_DEF
    $r8 = IMPLICIT_DEF
    $r9 = IMPLICIT_DEF
    $r10 = IMPLICIT_DEF
    $r11 = IMPLICIT_DEF
    $r12 = IMPLICIT_DEF
    $lr = IMPLICIT_DEF

    $sp = t2LDRi12 %fixed-stack.0, 0, 14, $noreg :: (load 4)

    KILL $r0
    KILL $r1
    KILL $r2
    KILL $r3
    KILL $r4
    KILL $r5
    KILL $r6
    KILL $r7
    KILL $r8
    KILL $r9
    KILL $r10
    KILL $r11
    KILL $r12
    KILL $lr
...
---
# This should not trigger an emergency spill yet.
# CHECK-LABEL: name: func1
# CHECK-NOT: t2STRi12
# CHECK-NOT: t2ADDri
# CHECK: $r11 = t2LDRi12 $sp, 4092, 14, $noreg :: (load 4)
# CHECK-NOT: t2LDRi12
name: func1
tracksRegLiveness: true
fixedStack:
  - { id: 0, offset: 4044, size: 4, alignment: 4, isImmutable: true,
      isAliased: false }
  - { id: 1, offset: -12, size: 4056, alignment: 4, isImmutable: false,
      isAliased: false }
body: |
  bb.0:
    $r0 = IMPLICIT_DEF
    $r1 = IMPLICIT_DEF
    $r2 = IMPLICIT_DEF
    $r3 = IMPLICIT_DEF
    $r4 = IMPLICIT_DEF
    $r5 = IMPLICIT_DEF
    $r6 = IMPLICIT_DEF
    $r8 = IMPLICIT_DEF
    $r9 = IMPLICIT_DEF
    $r10 = IMPLICIT_DEF
    $r11 = IMPLICIT_DEF
    $r12 = IMPLICIT_DEF
    $lr = IMPLICIT_DEF

    $r11 = t2LDRi12 %fixed-stack.0, 0, 14, $noreg :: (load 4)

    KILL $r0
    KILL $r1
    KILL $r2
    KILL $r3
    KILL $r4
    KILL $r5
    KILL $r6
    KILL $r8
    KILL $r9
    KILL $r10
    KILL $r11
    KILL $r12
    KILL $lr
...