From: shafitvm@gmail.com   
      
   > > Now for building the interference graph what other than register pairs   
   > > is there any other issues that one has to look out for?   
   >   
   >  - Calling conventions, i.e., caller-saves versus callee-saves   
   >    registers, parameter-transfer registers and registers used for   
   >    return address and stack/frame pointer.   
   >   
           parameter-transfer registers,return address registers and   
   stack/frame registers and other instruction specific and fixed-   
   function specific registers are handled by perpending and appending   
   move instructions to the register usages.   
   For caller/callee saved registers : A call instruction must cause all   
   volatile (caller-saves) registers to   
   interfere will all virtual register live at the call point.   
   Is there anything else other than this ?   
      
   Any help would be appreciated.   
      
   Regards,   
   Shafi.   
      
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