1# RUN: llc -march=hexagon -run-pass if-converter -verify-machineinstrs -o - %s | FileCheck %s
2
3# CHECK-LABEL: name: foo
4# CHECK: $p0 = C2_cmpeqi $r16, 0
5# Make sure there is no implicit use of r1.
6# CHECK: $r1 = L2_ploadruhf_io $p0, $r29, 6
7
8--- |
9  define void @foo() {
10    ret void
11  }
12...
13
14
15---
16name: foo
17tracksRegLiveness: true
18
19body: |
20  bb.0:
21    liveins: $r0, $r16
22    successors: %bb.1, %bb.2
23        $p0 = C2_cmpeqi $r16, 0
24        J2_jumpt $p0, %bb.2, implicit-def $pc
25
26  bb.1:
27    ; The lane mask $d0:0002 is equivalent to $r0. LivePhysRegs would ignore
28    ; it and treat it as the whole $d0, which is a pair $r1, $r0. The extra
29    ; $r1 would cause an (undefined) implicit use to be added during
30    ; if-conversion.
31    liveins: $d0:0x00000002, $d15:0x00000001, $r16
32    successors: %bb.2
33        $r1 = L2_loadruh_io $r29, 6
34        S2_storeri_io killed $r16, 0, $r1
35
36  bb.2:
37    liveins: $r0
38        $d8 = L2_loadrd_io $r29, 8
39        $d15 = L4_return $r29, implicit-def $r29, implicit-def $pc, implicit $r30, implicit $framekey
40
41