* src/ds390/ralloc.h,

* src/ds390/ralloc.h,
* src/ds390/ralloc.c (ds390_regWithIdx),
* src/ds390/gen.c (emitcode),
* src/ds390/main.h,
* src/ds390/main.c (instructionSize, ds390newAsmLineNode, updateOpRW,
ds390opcodeCompare, asmLineNodeFromLineNode, getInstructionSize,
ds390operandCompare, getRegsRead, getRegsWritten,
initializeAsmLineNode): customized instruction size calculation for
ds390, started basis for some register optimizations
* src/ds390/gen.c (gen390Code, emitcode): associate iCodes with
corresponding assembly output
* src/ds390/gen.c (genFunction, genEndFunction): added case to handle
missing push/pop of r0/r1. Optimized push/pops

git-svn-id: https://sdcc.svn.sourceforge.net/svnroot/sdcc/trunk/sdcc@3240 4a8a32a2-be11-0410-ad9d-d568d2c75423