gcc/gcc/varasm.c

638   int reg_number;
640   reg_number = decode_reg_name (asmspec);
645   if (reg_number == -2)
660 	  && DECL_REGISTER (decl) && reg_number == -1)
664 	       && DECL_REGISTER (decl) && reg_number < 0)
667       else if ((reg_number >= 0 || reg_number == -3)
678 	       && ! HARD_REGNO_MODE_OK (reg_number,
692 	  if (fixed_regs[reg_number] == 0
706 	  REGNO (DECL_RTL (decl)) = reg_number;
713 	      nregs = HARD_REGNO_NREGS (reg_number, DECL_MODE (decl));
715 		globalize_reg (reg_number + --nregs);