[Python-checkins] python/dist/src/Include opcode.h,2.41,2.42

[rhettinger@users.sourceforge.net]

Update of /cvsroot/python/python/dist/src/Include
In directory sc8-pr-cvs1:/tmp/cvs-serv4294/Include

Modified Files:
	opcode.h 
Log Message:
Improved the bytecode optimizer.
* Can now test for basic blocks.
* Optimize inverted comparisions.
* Optimize unary_not followed by a conditional jump.
* Added a new opcode, NOP, to keep code size constant.
* Applied NOP to previous transformations where appropriate.

Note, the NOP would not be necessary if other functions were 
added to re-target jump addresses and update the co_lnotab mapping.
That would yield slightly faster and cleaner bytecode at the
expense of optimizer simplicity and of keeping it decoupled
from the line-numbering structure.



Index: opcode.h
===================================================================
RCS file: /cvsroot/python/python/dist/src/Include/opcode.h,v
retrieving revision 2.41
retrieving revision 2.42
diff -C2 -d -r2.41 -r2.42
*** opcode.h	30 Aug 2002 13:09:49 -0000	2.41
--- opcode.h	22 Apr 2003 06:49:09 -0000	2.42
***************
*** 15,18 ****
--- 15,20 ----
  #define ROT_FOUR	5
  
+ #define NOP		9
+ 
  #define UNARY_POSITIVE	10
  #define UNARY_NEGATIVE	11