[HEXAGON] [MachinePipeliner] Fix the DAG in case of dependent phis. #135814
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%3:intregs = PHI %21:intregs, %bb.6, %7:intregs, %bb.1 - SU0 %7:intregs = PHI %21:intregs, %bb.6, %13:intregs, %bb.1 - SU1 %27:intregs = A2_zxtb %3:intregs - SU2 %13:intregs = C2_muxri %45:predregs, 0, %46:intreg If we have dependent phis, SU0 should be the successor of SU1 not the other way around.
%3:intregs = PHI %21:intregs, %bb.6, %7:intregs, %bb.1 - SU0 %7:intregs = PHI %21:intregs, %bb.6, %13:intregs, %bb.1 - SU1 %27:intregs = A2_zxtb %3:intregs - SU2 %13:intregs = C2_muxri %45:predregs, 0, %46:intreg If we have dependent phis, SU0 should be the successor of SU1 not the other way around.
…t into local_dependent_phis
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%3:intregs = PHI %21:intregs, %bb.6, %7:intregs, %bb.1 - SU0 %7:intregs = PHI %21:intregs, %bb.6, %13:intregs, %bb.1 - SU1 %27:intregs = A2_zxtb %3:intregs - SU2
%13:intregs = C2_muxri %45:predregs, 0, %46:intreg
If we have dependent phis, SU0 should be the successor of SU1 not the other way around.