sigh, too hasty with dropping -monly-3-regs on Int and Word
SRC_HC_OPTS += -hisuf $(way_)hi
endif
-Int_HC_OPTS += -H14m -fno-prune-tydecls
-Word_HC_OPTS += -H12m
+Int_HC_OPTS += -H14m -fno-prune-tydecls -monly-3-regs
+Word_HC_OPTS += -H12m -monly-3-regs
Foreign_HC_OPTS += -fno-prune-tydecls
NativeInfo_HC_OPTS += -fno-prune-tydecls
Dynamic_HC_OPTS += $(MAGIC_HSCPP_OPTS)