1 # RUN: llc -march=hexagon -run-pass=simple-register-coalescing -o - %s | FileCheck %s 2 3 # Make sure that the coalescer does not create a full definition with 4 # an undef flag on the destination. This used to happen when rematerializing 5 # a double register and coalescing a smaller reg into a subreg of it. 6 7 # CHECK-NOT: undef %[0-9]+:doubleregs = A2_tfrpi 1 8 9 --- 10 name: fred 11 tracksRegLiveness: true 12 body: | 13 14 bb.0: 15 successors: %bb.1(0x80000000); %bb.1(200.00%) 16 17 %18:doubleregs = A2_tfrpi 1 18 %23:intregs = IMPLICIT_DEF 19 %24:doubleregs = IMPLICIT_DEF 20 21 bb.1: 22 successors: %bb.1(0x80000000); %bb.1(200.00%) 23 24 %1:doubleregs = COPY %24:doubleregs 25 %0:intregs = COPY %23:intregs 26 %13:intregs = COPY %18.isub_lo:doubleregs 27 %13:intregs = S2_asl_i_r_or %13:intregs, %0:intregs, 1 28 %15:intregs = S2_extractu %0:intregs, 1, 31 29 undef %17.isub_lo:doubleregs = COPY %13:intregs 30 %17.isub_hi:doubleregs = COPY %15:intregs 31 %2:doubleregs = A2_addp %17:doubleregs, %1:doubleregs 32 %3:intregs = A2_addi %0:intregs, -1 33 %23:intregs = COPY %3:intregs 34 %24:doubleregs = COPY %2:doubleregs 35 J2_jump %bb.1, implicit-def dead $pc 36 37 ... 38
