1# RUN: llc -march=hexagon -run-pass expand-condsets -o - %s -verify-machineinstrs | FileCheck %s
2
3# CHECK-LABEL: name: fred
4
5# Make sure that <def,read-undef> is accounted for when validating moves
6# during predication. In the code below, %2.isub_hi is invalidated
7# by the C2_mux instruction, and so predicating the A2_addi as an argument
8# to the C2_muxir should not happen.
9
10--- |
11  define void @fred() { ret void }
12
13...
14---
15
16name: fred
17tracksRegLiveness: true
18registers:
19  - { id: 0, class: predregs }
20  - { id: 1, class: intregs }
21  - { id: 2, class: doubleregs }
22  - { id: 3, class: intregs }
23liveins:
24  - { reg: '$p0', virtual-reg: '%0' }
25  - { reg: '$r0', virtual-reg: '%1' }
26  - { reg: '$d0', virtual-reg: '%2' }
27
28body: |
29  bb.0:
30    liveins: $r0, $d0, $p0
31    %0 = COPY $p0
32    %1 = COPY $r0
33    %2 = COPY $d0
34    ; Check that this instruction is unchanged (remains unpredicated)
35    ; CHECK: %3:intregs = A2_addi %2.isub_hi, 1
36    %3 = A2_addi %2.isub_hi, 1
37    undef %2.isub_lo = C2_mux %0, %2.isub_lo, %1
38    %2.isub_hi = C2_muxir %0, %3, 0
39
40...
41