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1# RUN: llc -mtriple=hexagon -run-pass=register-coalescer -o - %s | FileCheck %s2 3# Make sure that the coalescer does not create a full definition with4# an undef flag on the destination. This used to happen when rematerializing5# a double register and coalescing a smaller reg into a subreg of it.6 7# CHECK-NOT: undef %[0-9]+:doubleregs = A2_tfrpi 18 9---10name: fred11tracksRegLiveness: true12body: |13 14 bb.0:15 successors: %bb.1(0x80000000); %bb.1(200.00%)16 17 %18:doubleregs = A2_tfrpi 118 %23:intregs = IMPLICIT_DEF19 %24:doubleregs = IMPLICIT_DEF20 21 bb.1:22 successors: %bb.1(0x80000000); %bb.1(200.00%)23 24 %1:doubleregs = COPY %24:doubleregs25 %0:intregs = COPY %23:intregs26 %13:intregs = COPY %18.isub_lo:doubleregs27 %13:intregs = S2_asl_i_r_or %13:intregs, %0:intregs, 128 %15:intregs = S2_extractu %0:intregs, 1, 3129 undef %17.isub_lo:doubleregs = COPY %13:intregs30 %17.isub_hi:doubleregs = COPY %15:intregs31 %2:doubleregs = A2_addp %17:doubleregs, %1:doubleregs32 %3:intregs = A2_addi %0:intregs, -133 %23:intregs = COPY %3:intregs34 %24:doubleregs = COPY %2:doubleregs35 J2_jump %bb.1, implicit-def dead $pc36 37...38