https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102347
--- Comment #6 from Martin Liška <marxin at gcc dot gnu.org> --- Quickly looking at the rs6000 code, it fails here: #1 0x0000000011a0993c in rs6000_invalid_builtin (fncode=MMA_BUILTIN_DISASSEMBLE_ACC_INTERNAL) at ../../gcc/config/rs6000/rs6000-call.c:11643 #2 0x0000000011a13134 in rs6000_builtin_decl (code=1603, initialize_p=true) at ../../gcc/config/rs6000/rs6000-call.c:13870 #3 0x00000000115c3900 in unpack_ts_function_decl_value_fields (bp=0x3fffffffe2f0, expr=0x3fffaf195700) at ../../gcc/tree-streamer-in.c:361 #4 0x00000000115c4790 in streamer_read_tree_bitfields (ib=0x3fffffffe6a0, data_in=0x132d1910, expr=0x3fffaf195700) at ../../gcc/tree-streamer-in.c:528 #5 0x0000000010deaa28 in lto_read_tree_1 (ib=0x3fffffffe6a0, data_in=0x132d1910, expr=0x3fffaf195700) at ../../gcc/lto-streamer-in.c:1697 which relies on rs6000_builtin_mask. Note the mask is set here: rs6000_builtin_mask = rs6000_builtin_mask_calculate (); where rs6000_builtin_mask_calculate is based on TARGET_* values. I think the mask check should be deferred later as it should be based on proper target_node that is set via rs6000_set_current_function. It should not check it in lto_read_tree_1.
