llvm/test/CodeGen/SystemZ/cond-move-11.mir

# RUN: llc -o - %s -mtriple=s390x-linux-gnu -mcpu=z15 -start-before=systemz-post-rewrite \
# RUN:   -stop-after=machine-cp -verify-machineinstrs 2>&1 | FileCheck %s

# The chained SELRMux:es both has two operands with the same register but
# where one of the operands have been marked as undef (resulting from
# early-ifcvt). Check that the resulting COPY after machine-cp is from $r0l
# to $r2l.

# CHECK:      name: fun0
# CHECK:      $r2l = COPY $r0l
--- |
  
  @Res = global i32 0, align 4
  @Z = global i32 0, align 4
  define signext i32 @fun0() { ret i32 0 }
...
---
name:            fun0
tracksRegLiveness: true
body:             |
  bb.0:
    successors: %bb.1(0x80000000)
  
    renamable $r0l = LRL @Z :: (dereferenceable load (s32) from @Z)
    renamable $r1l = LHIMux 1
  
  bb.1:
    successors: %bb.1(0x7c000000), %bb.2(0x04000000)
    liveins: $r0l, $r1l
  
    CHIMux renamable $r1l, 0, implicit-def $cc
    renamable $r2l = SELRMux undef renamable $r0l, renamable $r0l, 14, 6, implicit $cc
    renamable $r2l = SELRMux undef renamable $r2l, killed renamable $r2l, 14, 6, implicit $cc
    BRC 14, 8, %bb.1, implicit killed $cc
    J %bb.2
  
  bb.2:
    liveins: $r2l
  
    STRL renamable $r2l, @Res :: (store (s32) into @Res)
    renamable $r2d = LGFR killed renamable $r2l
    Return implicit $r2d
...