llvm-project/llvm/test/CodeGen/Hexagon/anti-dep-partial.mir

# RUN: llc -march=hexagon -post-RA-scheduler -run-pass post-RA-sched %s -o - | FileCheck %s

--- |
  declare void @check(i64, i32, i32, i64)
  define void @foo() {
    ret void
  }
...

---
name: foo
tracksRegLiveness: true
body: |
  bb.0:
    successors:
    liveins: $r0, $r1, $d1, $d2, $r16, $r17, $r19, $r22, $r23
        $r2 = A2_add $r23, killed $r17
        $r6 = M2_mpyi $r16, $r16
        $r22 = M2_accii $r22, killed $r2, 2
        $r7 = A2_tfrsi 12345678
        $r3 = A2_tfr killed $r16
        $d2 = A2_tfrp killed $d0
        $r2 = L2_loadri_io $r29, 28
        $r2 = M2_mpyi killed $r6, killed $r2
        $r23 = S2_asr_i_r $r22, 31
        S2_storeri_io killed $r29, 0, killed $r7
        ; The anti-dependency on r23 between the first A2_add and the
        ; S2_asr_i_r was causing d11 to be renamed, while r22 remained
        ; unchanged. Check that the renaming of d11 does not happen.
        ; CHECK: d11
        $d0 = A2_tfrp killed $d11
        J2_call @check, implicit-def $d0, implicit-def $d1, implicit-def $d2, implicit $d0, implicit $d1, implicit $d2
...