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Drop the respective check. --- a/gas/config/tc-i386.c +++ b/gas/config/tc-i386.c @@ -13875,13 +13875,8 @@ i386_parse_name (char *name, expressionS { *nextcharP = *input_line_pointer; *input_line_pointer = 0; - if (r != &bad_reg) - { - e->X_op = O_register; - e->X_add_number = r - i386_regtab; - } - else - e->X_op = O_illegal; + e->X_op = O_register; + e->X_add_number = r - i386_regtab; return 1; } input_line_pointer = end;