# RUN: llc -mtriple=thumbv8 -run-pass=peephole-opt %s -o - | FileCheck %s

# Test case for PR 47980:
# Ensure that peephole optimization to fold move immediate doesn't unconstrain
# the register class of the consumer.
#
# Check that register class for %5 is unchanged as 'tcgpr'
# CHECK: { id: 5, class: tcgpr, preferred-register: '', flags: [  ] }
# CHECK: TCRETURNri killed %5

--- |
  define i32 @foo(i32 %in) {
    ret i32 undef
  }
...
---
name:            foo
registers:
  - { id: 0, class: gpr}
  - { id: 1, class: gpr }
  - { id: 2, class: rgpr }
  - { id: 3, class: gpr }
  - { id: 4, class: rgpr }
  - { id: 5, class: tcgpr }
liveins:
  - { reg: '$r0', virtual-reg: '%0' }
  - { reg: '$r1', virtual-reg: '%1' }
  - { reg: '$r2', virtual-reg: '%2' }
  - { reg: '$r3', virtual-reg: '%3' }
body:             |
  bb.0 (%ir-block.0):
    liveins: $r0, $r1, $r2, $r3
    %0 = COPY $r0
    %1 = COPY $r1
    %2 = COPY $r2
    %3 = COPY $r3

    %4 = t2MOVi32imm 270337
    %5 = t2ADDrr killed %2, killed %4, 14, $noreg, $noreg
    $r0 = COPY %0
    $r1 = COPY %1
    $r2 = COPY %2
    $r3 = COPY %3
    TCRETURNri killed %5, 0, implicit $sp, implicit $r0, implicit $r1, implicit $r2, implicit $r3
...