* as/mcs51/asdata.c: changed ctype['['] to BINOP

* as/mcs51/asdata.c: changed ctype['['] to BINOP
* as/mcs51/asexpr.c (expr): added case '[' for bit access in bdata,
  (term): abused bit 15 of s_addr to indicate bit-addressable bytes,
  (oprio): set priority for '['
* as/mcs51/aslink.h: added define R_BIT, and prototypes for adb_bit
   and adb_24_bit
* as/mcs51/asm.h: added defines R_BIT and S_BIT
* as/mcs51/lkarea.c (lnksect2): use T for seg BIT_BANK and overlay it
* as/mcs51/lkdata.c: changed ctype['['] to BINOP
* as/mcs51/lkmain.c (Areas51): rel2 contains 12 (=C) areas now,
  added overlayable BIT_BANK area
* as/mcs51/lkmem.c (summary): add BIT_BANK to BSEG_BYTES in the report,
  (summary2): explain 'T' in legenda
* as/mcs51/lkrloc.c: replaced old K&R style,
  (relr): added R_BIT processing,
  (errmsg): added "Bit-addressable relocation error",
  (adb_bit): added for converting from byte- to bit-addressable space,
  (adb_24_bit): added for converting from byte- to bit-addressable space
* device/include/stdbool.h: changed BOOL to __bit for mcs51 as it can be
   used in reentrant functions now even as return value
* device/lib/_gptrput.c (_gptrput): removed obsolete code
* src/SDCCast.c (resultTypePropagate): also propagate AND_OP and OR_OP,
  (decorateType): case '!', GETHBIT, AND_OP, OR_OP: result in bool or char
* src/SDCCglobl.h: added indicator BitBankUsed
* src/SDCCglue.c (glue): emit area BIT_BANK with byte 'bits' and equ's for
   the bit registers b0-b7
* src/SDCCicode.c (operandFromSymbol): removed IS_BITVAR check,
  (geniCodeCast): fixed bug 1263853,
  (geniCodeLogicAndOr): put result in bool or char,
  (geniCodeReceive): added parameter func for accessing the return type,
  (geniCodeFunctionBody): pass func to geniCodeReceive
* src/SDCCmain.c: added indicator BitBankUsed
* src/SDCCmem.c (allocLocal): explicitly set sclass for V_BIT
* src/SDCCsymt.c (newBoolLink): added for creating a bool/bit,
  (checkSClass): don't put automatic bool/bit on stack,
  (checkFunction): removed check on function cannot return bit
* src/SDCCsymt.h: added newBoolLink prototype
* src/mcs51/gen.c (rb1regs): added bit registers,
  (movc): created for assigning to carry,
  (pushReg, popReg): created for pushing registers,
  (sameRegs): check both AOP_REG and AOP_CRY types,
  (aopOp): handle bit registers,
  (aopPut): optimization no self-assign,
  (saveRegisters): push reg->base (bits) only once for bit registers,
   and use pushReg,
  (unsaveRegisters): pop reg->base only once and use popReg,
  (assignResultValue): added parameter func and return in carry for bits,
  (genIpush): optimization no reload in A if not changed,
  (genSend): bit parameters in reentrant functions are passed in bit
   registers by first assigning to bits in B, then save registers and
   copy B to bits,
  (genCall): handle returning in Carry properly, save it in F0 if needed,
  (genPcall): updated assignResultValue call, this is not safe yet for bit
   returning function !!!
  (genFunction): don't generate equ's for bit registers and use pushReg,
  (genEndFunction): take care of bit returning functions and use popReg,
  (genRet): return bit in Carry,
  (genIfx): optimize bit registers and other directly addressable bits,
  (genReceive): updated assignResultValue call
* src/mcs51/main.c (_mcs51_reset_regparm): added regBitParmFlg,
  (_mcs51_regparm): allow passing of upto 8 bit parameters in bit
   registers when using stack-auto
* src/mcs51/ralloc.c (_G): added allBitregs,
  (regs8051): added the bit registers,
  (createStackSpil): use macro IS_BIT,
  (getRegBit): added to allocate a bit register, else spill,
  (getRegBitNoSpil): added to allocate a bit register, else a gpr,
  (updateRegUsage): factored out to ease stepping while debugging,
  (serialRegAssign): use updateRegUsage, only spill bits if necessary,
   also allocate bit registers,
  (fillGaps): handle bit registers,
  (findAllBitregs): added to create bit vector with all bit registers,
  (mcs51_allBitregs): returns this bit vector,
  (mcs51_assignRegisters): when using stack-auto use bit registers for
   passing parameters and creating local variables
* src/mcs51/ralloc.h: added B0_IDX..B7_IDX and prototype mcs51_allBitregs

git-svn-id: https://sdcc.svn.sourceforge.net/svnroot/sdcc/trunk/sdcc@3873 4a8a32a2-be11-0410-ad9d-d568d2c75423