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overlapping-copy-bundle.mir @a813b38

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# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
# RUN: llc -mtriple=aarch64-apple-ios -run-pass=greedy -run-pass=virtregrewriter %s -o - | FileCheck %s
---
name: func0
body: |
  bb.0:
    ; Make sure we don't clobber q3 when we expand the bundle
    ; CHECK-LABEL: name: func0
    ; CHECK: $x0 = IMPLICIT_DEF
    ; CHECK: $q0_q1_q2_q3 = IMPLICIT_DEF
    ; CHECK: $q4 = COPY $q3
    ; CHECK: $q1_q2_q3 = COPY $q0_q1_q2
    ; CHECK: ST4i64 $q1_q2_q3_q4, 0, $x0
    $x0 = IMPLICIT_DEF
    $q0_q1_q2_q3 = IMPLICIT_DEF
    $q1_q2_q3 = COPY $q0_q1_q2 {
      $q4 = COPY $q3
    }
    ST4i64 $q1_q2_q3_q4, 0, $x0

...
---
name: func1
body: |
  bb.0:
    ; If it was already ordered, make sure we don't break it
    ; CHECK-LABEL: name: func1
    ; CHECK: $x0 = IMPLICIT_DEF
    ; CHECK: $q0_q1_q2_q3 = IMPLICIT_DEF
    ; CHECK: $q4 = COPY $q3
    ; CHECK: $q1_q2_q3 = COPY $q0_q1_q2
    ; CHECK: ST4i64 $q1_q2_q3_q4, 0, $x0
    $x0 = IMPLICIT_DEF
    $q0_q1_q2_q3 = IMPLICIT_DEF
    $q4 = COPY $q3 {
      $q1_q2_q3 = COPY $q0_q1_q2
    }
    ST4i64 $q1_q2_q3_q4, 0, $x0

...
---
name: func2
body: |
  bb.0:
    ; A bit less realistic, but check that we handle multiple nodes
    ; CHECK-LABEL: name: func2
    ; CHECK: $x0 = IMPLICIT_DEF
    ; CHECK: $q0_q1_q2_q3 = IMPLICIT_DEF
    ; CHECK: $q3 = COPY $q2
    ; CHECK: $q4 = COPY $q1
    ; CHECK: $q1_q2 = COPY $q0_q1
    ; CHECK: ST4i64 $q1_q2_q3_q4, 0, $x0
    $x0 = IMPLICIT_DEF
    $q0_q1_q2_q3 = IMPLICIT_DEF
    $q1_q2 = COPY $q0_q1 {
      $q3 = COPY $q2
      $q4 = COPY $q1
    }
    ST4i64 $q1_q2_q3_q4, 0, $x0

...
---
name: func3
body: |
  bb.0:
    ; If there was nothing wrong, don't change the order for no reason
    ; CHECK-LABEL: name: func3
    ; CHECK: $x0 = IMPLICIT_DEF
    ; CHECK: $q1_q2_q3_q4 = IMPLICIT_DEF
    ; CHECK: $q0_q1 = COPY $q1_q2
    ; CHECK: $q2_q3 = COPY $q3_q4
    ; CHECK: ST4i64 $q0_q1_q2_q3, 0, $x0
    $x0 = IMPLICIT_DEF
    $q1_q2_q3_q4 = IMPLICIT_DEF
    $q0_q1 = COPY $q1_q2 {
      $q2_q3 = COPY $q3_q4
    }
    ST4i64 $q0_q1_q2_q3, 0, $x0

...