test/CodeGen/AArch64/elim-dead-mi.mir

# RUN: llc -mtriple=aarch64-arm-none-eabi -o - %s \
# RUN: -run-pass dead-mi-elimination | FileCheck %s
--- |
  @c = internal unnamed_addr global [3 x i8] zeroinitializer, align 4
  @d = common dso_local local_unnamed_addr global i32 0, align 4

  define dso_local i32 @main() local_unnamed_addr {
  %scevgep = getelementptr i8, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @c, i64 0, i64 1), i64 0
  ret i32 0
  }
...
---
name:            main
tracksRegLiveness: true
registers:
  - { id: 0, class: gpr64, preferred-register: '' }
  - { id: 1, class: gpr64common, preferred-register: '' }
  - { id: 2, class: gpr64, preferred-register: '' }
  - { id: 3, class: gpr64common, preferred-register: '' }
  - { id: 4, class: gpr32, preferred-register: '' }
  - { id: 5, class: gpr32all, preferred-register: '' }
  - { id: 6, class: gpr64, preferred-register: '' }
body:             |
  bb.0:
    successors: %bb.4(0x30000000), %bb.5(0x50000000)

    %0:gpr64 = MOVaddr target-flags(aarch64-page) @c, target-flags(aarch64-pageoff, aarch64-nc) @c
    CBZX killed %0, %bb.4
    B %bb.5

  bb.1:
    successors: %bb.3(0x04000000), %bb.2(0x7c000000)

    %1:gpr64common = MOVaddr target-flags(aarch64-page) @c, target-flags(aarch64-pageoff, aarch64-nc) @c
    %2:gpr64 = SUBSXri %1, 2, 0, implicit-def $nzcv
    Bcc 0, %bb.3, implicit $nzcv
    B %bb.2

  bb.2:
    successors: %bb.1(0x80000000)
    %3:gpr64common = ADDXrr %6, %2
    %4:gpr32 = LDRBBui killed %3, 1 :: (load 1 from %ir.scevgep)
    %5:gpr32all = COPY %4
    B %bb.1

  bb.3:
    ADJCALLSTACKDOWN 0, 0, implicit-def dead $sp, implicit $sp
    $x0 = MOVaddr target-flags(aarch64-page) @c, target-flags(aarch64-pageoff, aarch64-nc) @c
    ADJCALLSTACKUP 0, 0, implicit-def dead $sp, implicit $sp
    RET_ReallyLR implicit $w0

  bb.4:
    successors: %bb.5(0x80000000)

  bb.5:
    successors: %bb.1(0x80000000)
    ; CHECK: bb.5
    ; CHECK-NOT: %6:gpr64 = MOVaddr target-flags(aarch64-page) @c, target-flags(aarch64-pageoff, aarch64-nc) @c
    %6:gpr64 = MOVaddr target-flags(aarch64-page) @c, target-flags(aarch64-pageoff, aarch64-nc) @c
    B %bb.1
...