test/CodeGen/Hexagon/livephysregs-lane-masks2.mir

# RUN: llc -march=hexagon -verify-machineinstrs -run-pass branch-folder -o - %s | FileCheck %s

# CHECK-LABEL: name: fred

--- |
  define void @fred() { ret void }

...
---

name: fred
tracksRegLiveness: true

body: |
  bb.0:
    liveins: %p2, %r0
    successors: %bb.1, %bb.2
        J2_jumpt killed %p2, %bb.1, implicit-def %pc
        J2_jump %bb.2, implicit-def %pc

  bb.1:
    liveins: %r0, %r19
    successors: %bb.3
        %r2 = A2_tfrsi 4
        %r1 = COPY %r19
        %r0 = S2_asl_r_r killed %r0, killed %r2
        %r0 = A2_asrh killed %r0
        J2_jump %bb.3, implicit-def %pc

  bb.2:
    liveins: %r0, %r18
    successors: %bb.3
        %r2 = A2_tfrsi 5
        %r1 = L2_loadrh_io %r18, 0
        %r0 = S2_asl_r_r killed %r0, killed %r2
        %r0 = A2_asrh killed %r0

  bb.3:
    ; A live-in register without subregs, but with a lane mask that is not ~0
    ; is not recognized by LivePhysRegs. Branch folding exposes this problem
    ; (through tail merging).
    ;
    ; CHECK: bb.3:
    ; CHECK: liveins:{{.*}}%p0
    ; CHECK:   %r0 = S2_asl_r_r killed %r0, killed %r2
    ; CHECK:   %r0 = A2_asrh killed %r0
    ; CHECK:   %r0 = C2_cmoveit killed %p0, 1
    ; CHECK:   J2_jumpr %r31, implicit-def %pc, implicit %r0
    ;
    liveins: %p0:0x1
        %r0 = C2_cmoveit killed %p0, 1
        J2_jumpr %r31, implicit-def %pc, implicit %r0
...