llvm/test/CodeGen/SystemZ/misched-prera-biaspregs.mir

# RUN: llc -o - %s -mtriple=s390x-linux-gnu -mcpu=z16 -verify-machineinstrs \
# RUN:   -run-pass=machine-scheduler 2>&1 | FileCheck %s

# The COPY to r2 should be right before the return.
# CHECK:      name: fun0
# CHECK:      $r2d = COPY %0
# CHECK-NEXT: Return implicit $r2d
---
name:            fun0
tracksRegLiveness: true
body:             |
  bb.0.entry:
    %0:gr64bit = LGHI 0
    $r2d = COPY %0
    %1:gr64bit = LGHI 0
    Return implicit $r2d
...

# The COPY from r2 should be first.
# CHECK:      name: fun1
# CHECK:      liveins: $r2
# CHECK-NEXT: {{  $}}
# CHECK-NEXT: %2:gr64bit = COPY $r2
---
name:            fun1
tracksRegLiveness: true
body:             |
  bb.0.entry:
    liveins: $r2d

    %0:gr64bit = LGHI 1
    %1:gr64bit = COPY %0
    %2:gr64bit = COPY %1
    %2:gr64bit = COPY $r2d
    $r2d = COPY %2
    Return implicit $r2d
...

# The LGHI to r2 should be right before the return.
# CHECK:      name: fun2
# CHECK:      $r2d = LGHI 0
# CHECK-NEXT: Return implicit $r2d
---
name:            fun2
tracksRegLiveness: true
body:             |
  bb.0.entry:
    %0:gr64bit = LGHI 0
    $r2d = LGHI 0
    %1:gr64bit = LGHI 0
    Return implicit $r2d
...

# The LA to r2 should be right before the return.
# CHECK:      name: fun3
# CHECK:      $r2d = LA %stack.0, 0, $noreg
# CHECK-NEXT: Return implicit $r2d
---
name:            fun3
tracksRegLiveness: true
stack:
  - { id: 0, size: 8 }
body:             |
  bb.0:
    $r2d = LA %stack.0, 0, $noreg
    %0:gr64bit = LGHI 0
    Return implicit killed $r2d
...

# Don't reorder phys-reg COPYs. Recognize LA to PReg with a VReg use.
# CHECK:      name: fun4
# CHECK:      %0:addr64bit = COPY $r2d
# CHECK-NEXT: dead %3:gr64bit = COPY $r3d
# CHECK-NEXT: %1:gr64bit = AGRK %0, %0, implicit-def $cc
# CHECK-NEXT: dead %2:gr64bit = AGRK %1, %0, implicit-def $cc
# CHECK-NEXT: $r2d = LA %0, 0, $noreg
# CHECK-NEXT: Return
---
name:            fun4
tracksRegLiveness: true
stack:
  - { id: 0, size: 8 }
body:             |
  bb.0.entry:
    liveins: $r2d, $r3d

    %0:addr64bit = COPY $r2d
    %2:gr64bit = AGRK %0, %0, implicit-def $cc
    $r2d = LA %0, 0, $noreg
    %3:gr64bit = AGRK %2, %0, implicit-def $cc
    %1:gr64bit = COPY $r3d

    Return
...