sdcc/src/SDCClrange.h

   1 /*-------------------------------------------------------------------------
   2
   3   SDCClrange.h - header file for live range computations
   4
   5              Written By -  Sandeep Dutta . sandeep.dutta@usa.net (1998)
   6
   7    This program is free software; you can redistribute it and/or modify it
   8    under the terms of the GNU General Public License as published by the
   9    Free Software Foundation; either version 2, or (at your option) any
  10    later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  20
  21    In other words, you are welcome to use, share and improve this program.
  22    You are forbidden to forbid anyone else to use, share and improve
  23    what you give them.   Help stamp out software-hoarding!
  24 -------------------------------------------------------------------------*/
  25
  26 #ifndef SDCCLRANGE_H
  27 #define SDCCLRANGE_H 1
  28
  29 extern hTab *liveRanges;
  30 extern hTab *iCodehTab;
  31 extern hTab *iCodeSeqhTab;
  32
  33 int  notUsedInBlock (symbol *, eBBlock *, iCode *);
  34 bool allDefsOutOfRange (bitVect *, int, int);
  35 void computeLiveRanges (eBBlock **ebbs, int count, bool emitWarnings);
  36 void recomputeLiveRanges (eBBlock **ebbs, int count, bool emitWarnings);
  37
  38 void setToRange (operand *, int, bool);
  39 void hashiCodeKeys (eBBlock **, int);
  40
  41 void adjustIChain (eBBlock ** ebbs, int count);
  42
  43 int separateLiveRanges (iCode *sic, ebbIndex *ebbi); /* Split iTemps that have non-connected live-ranges. */
  44
  45 int shortenLiveRanges (iCode *sic, ebbIndex *ebbi); /* Do some optimizations that shorten live ranges. */
  46
  47 #endif
  48