# RUN: llc -o - %s -mtriple=aarch64 -run-pass=aarch64-ccmp -aarch64-stress-ccmp | FileCheck %s
# RUN: llc -o - %s -mtriple=aarch64 -passes=aarch64-ccmp -aarch64-stress-ccmp | FileCheck %s
---
name: ccmp-look-through-copy
tracksRegLiveness: true
registers:
  - { id: 0, class: gpr64 }
  - { id: 1, class: gpr64 }
  - { id: 4, class: gpr64 }
  - { id: 6, class: gpr64 }
  - { id: 7, class: gpr64 }
  - { id: 8, class: gpr64 }
  - { id: 9, class: gpr64 }
body: |
  bb.0:
    successors: %bb.1(0x40000000), %bb.2(0x40000000)
    liveins: $x0, $x1
  
    ; CHECK-LABEL: name: ccmp-look-through-copy
    ; CHECK: bb.0:
    ; CHECK: CCMPXr

    %0:gpr64 = COPY $x0
    %1:gpr64 = COPY $x1
    %4:gpr64 = COPY %0
    %7:gpr64 = COPY %4
    %6:gpr64 = SUBSXrr %0, %1, implicit-def $nzcv
    Bcc 11, %bb.2, implicit $nzcv
    B %bb.1
  
  bb.1:
    successors: %bb.2(0x40000000), %bb.3(0x40000000)
  
    %8:gpr64 = SUBSXrr %1, %0, implicit-def $nzcv
    Bcc 12, %bb.2, implicit $nzcv
    B %bb.3
  
  bb.2:
    %9:gpr64 = PHI %4, %bb.0, %7, %bb.1
    $x0 = COPY %9
    RET_ReallyLR implicit $x0
  
  bb.3:
    $x0 = COPY %0
    RET_ReallyLR implicit $x0
...