llvm/test/CodeGen/MIR/ARM/cfi-same-value.mir

# RUN: llc -mtriple=arm-linux-unknown-gnueabi -run-pass none -o - %s | FileCheck %s

--- |
  declare void @dummy_use(i32*, i32)

  define void @test_basic() #0 {
  entry:
    %mem = alloca i32, i32 10
    call void @dummy_use(i32* %mem, i32 10)
    ret void
  }

  attributes #0 = { "split-stack" }
...
---
name:            test_basic
tracksRegLiveness: true
frameInfo:
  stackSize:       48
  maxAlignment:    4
  adjustsStack:    true
  hasCalls:        true
stack:
  - { id: 0, name: mem, offset: -48, size: 40, alignment: 4 }
  - { id: 1, type: spill-slot, offset: -4, size: 4, alignment: 4,
      callee-saved-register: '%lr' }
  - { id: 2, type: spill-slot, offset: -8, size: 4, alignment: 4,
      callee-saved-register: '%r11' }
body: |
  bb.0:
    successors: %bb.2, %bb.1
    liveins: %r11, %lr

    %sp = STMDB_UPD %sp, 14, _, %r4, %r5
    CFI_INSTRUCTION def_cfa_offset 8
    CFI_INSTRUCTION offset %r5, -4
    CFI_INSTRUCTION offset %r4, -8
    %r5 = MOVr %sp, 14, _, _
    %r4 = MRC 15, 0, 13, 0, 3, 14, _
    %r4 = LDRi12 %r4, 4, 14, _
    CMPrr %r4, %r5, 14, _, implicit-def %cpsr
    Bcc %bb.2, 3, %cpsr

  bb.1:
    successors: %bb.2
    liveins: %r11, %lr

    %r4 = MOVi 48, 14, _, _
    %r5 = MOVi 0, 14, _, _
    %sp = STMDB_UPD %sp, 14, _, %lr
    CFI_INSTRUCTION def_cfa_offset 12
    CFI_INSTRUCTION offset %lr, -12
    BL &__morestack, implicit-def %lr, implicit %sp
    %sp = LDMIA_UPD %sp, 14, _, %lr
    %sp = LDMIA_UPD %sp, 14, _, %r4, %r5
    CFI_INSTRUCTION def_cfa_offset 0
    BX_RET 14, _

  bb.2:
    liveins: %r11, %lr

    %sp = LDMIA_UPD %sp, 14, _, %r4, %r5
    CFI_INSTRUCTION def_cfa_offset 0
  ; CHECK:      CFI_INSTRUCTION same_value %r4
  ; CHECK-NEXT: CFI_INSTRUCTION same_value %r5
    CFI_INSTRUCTION same_value %r4
    CFI_INSTRUCTION same_value %r5
    %sp = frame-setup STMDB_UPD %sp, 14, _, killed %r11, killed %lr
    frame-setup CFI_INSTRUCTION def_cfa_offset 8
    frame-setup CFI_INSTRUCTION offset %lr, -4
    frame-setup CFI_INSTRUCTION offset %r11, -8
    %sp = frame-setup SUBri killed %sp, 40, 14, _, _
    frame-setup CFI_INSTRUCTION def_cfa_offset 48
    %r0 = MOVr %sp, 14, _, _
    %r1 = MOVi 10, 14, _, _
    BL @dummy_use, csr_aapcs, implicit-def dead %lr, implicit %sp, implicit %r0, implicit killed %r1, implicit-def %sp
    %sp = ADDri killed %sp, 40, 14, _, _
    %sp = LDMIA_UPD %sp, 14, _, %r4, %r5
    MOVPCLR 14, _
...