File: dce-disjoint-intervals.mir

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# RUN: llc -mtriple=amdgcn-- -run-pass=liveintervals,dead-mi-elimination,simple-register-coalescing -verify-machineinstrs -o - %s | FileCheck -check-prefix=GCN %s

# This is used to fail verififcation if MachineDCE tracks LIS.

# GCN-LABEL: name: foo
# GCN: S_ENDPGM
---
name:            foo
tracksRegLiveness: true
body:             |
  bb.0:
    liveins: $sgpr0_sgpr1

    %10:sgpr_128 = S_LOAD_DWORDX4_IMM killed $noreg, 9, 0, 0
    S_NOP 0, implicit-def %4:sgpr_128, implicit %10.sub1:sgpr_128
    S_CBRANCH_SCC0 %bb.3, implicit undef $scc
    S_BRANCH %bb.1

  bb.1:
    S_CBRANCH_SCC0 %bb.2, implicit undef $scc
    S_BRANCH %bb.3

  bb.2:
    %8:sreg_32_xm0 = COPY %4.sub1:sgpr_128
    %7:sreg_32_xm0 = COPY %10.sub1:sgpr_128
    S_BRANCH %bb.4

  bb.3:
    %10:sgpr_128 = S_LOAD_DWORDX4_IMM killed $noreg, 10, 0, 0
    %7:sreg_32_xm0 = COPY %10.sub1:sgpr_128
    %8:sreg_32_xm0 = COPY %10.sub2:sgpr_128

  bb.4:
    S_NOP 0, implicit %10
    $sgpr0 = COPY %8:sreg_32_xm0
    $sgpr1 = COPY %7:sreg_32_xm0
    S_ENDPGM 0, implicit $sgpr0, implicit $sgpr1
...