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
...