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Otoh no register name is longer than 7 bytes. Hence even for 32-bit builds using a pointer is only slightly more space efficient than embedding the strings. A level of indirection can be also avoided by embedding the names as an array of 8 characters directly in the struct, and the number of base relocations in PIE builds of gas goes down as well. --- a/opcodes/i386-opc.h +++ b/opcodes/i386-opc.h @@ -987,7 +987,7 @@ insn_template; /* these are for register name --> number & type hash lookup */ typedef struct { - const char *reg_name; + char reg_name[8]; i386_operand_type reg_type; unsigned char reg_flags; #define RegRex 0x1 /* Extended register. */