1 # RUN: llc -march hexagon -run-pass livevars -run-pass twoaddressinstruction -verify-machineinstrs -o - %s | FileCheck %s
4 ###############################################################################
8 tracksRegLiveness: true
13 %0:doubleregs = COPY killed $d0
14 %1:intregs = S2_lsr_i_r_acc %0.isub_lo, %0.isub_lo, 16
18 # Verify that both uses if %0.isub_lo are replaced here.
19 # (we used to get %1:intregs = S2_lsr_i_r_acc %1, %1.isub_lo, 16)
21 # CHECK-LABEL: name: test1
23 # CHECK: %0:doubleregs = COPY killed $d0
24 # CHECK-NEXT: %1:intregs = COPY killed %0.isub_lo
25 # CHECK-NEXT: %1:intregs = S2_lsr_i_r_acc %1, %1, 16
28 ###############################################################################
32 tracksRegLiveness: true
37 %0:doubleregs = COPY killed $d0
38 %1:intregs = S2_lsr_i_r_acc %0.isub_lo, %0.isub_hi, 16
42 # Verify that the use of %0.isub_hi isn't replaced here.
43 # (we used to get %1:intregs = S2_lsr_i_r_acc %1, %1.isub_hi, 16)
45 # We also used to get an incorrect "killed" for %0 in the second COPY.
46 # So we verify that we do not get machine verifier complaints here.
47 # An improvement could be to get a "killed" attribute on the last
48 # use of %0.isub_hi, but we do not need it for the IR to be valid.
50 # CHECK-LABEL: name: test2
52 # CHECK: %0:doubleregs = COPY killed $d0
53 # CHECK-NEXT: %1:intregs = COPY %0.isub_lo
54 # CHECK-NEXT: %1:intregs = S2_lsr_i_r_acc %1, %0.isub_hi, 16
56 ###############################################################################