AriasCreations/LSL-PyOptimizer
3
0
Fork 0
mirror of https://github.com/Sei-Lisa/LSL-PyOptimizer synced 2025-07-01 23:58:20 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

Add preprocessor skip option, command line options and help, options for all functions, and enhance parentheses removal.

Browse source
This commit is contained in:
Sei Lisa 2014-07-28 02:13:08 +02:00
parent ae94e80c34
commit eab0bec84b
4 changed files with 99 additions and 27 deletions
Download patch file Download diff file Expand all files Collapse all files

17
lslopt/lsloptimizer.py
View file

@ -31,6 +31,7 @@ class optimizer(object):
"""If the statement is a constant or an identifier, remove it as it does
nothing.
"""
# Ideally this should consider side effect analysis of the whole thing.
if code[0] in (CONSTANT, 'IDENT', 'FIELD'):
code[:] = [S[';'], None]
else:
@ -86,7 +87,10 @@ class optimizer(object):
if code0 == '()':
self.FoldTree(code[2])
if code[2][0] == CONSTANT:
if code[2][0] in (CONSTANT, 'VECTOR', 'ROTATION', 'LIST',
'IDENT', 'FIELD', 'V++', 'V--', 'FUNCTION', 'PRINT'):
# Child is an unary postfix expression; parentheses can be
# removed safely.
code[:] = code[2]
return
@ -154,8 +158,11 @@ class optimizer(object):
code[:] = [S['*'], code[1], code[2], [CONSTANT, 'integer', 1<<(code[3][2] & 31)]]
else:
pass # TODO: Eliminate redundancy (x+0, x*1, x*-1, v+ZERO_VECTOR, perhaps x-1=~-x, etc.)
# Include != to ^ and || to | and maybe && to &
# Note some cases e.g. x*0 can't be optimized away without side-effect analysis.
# But some cases like %1 can be turned into *0 to save bytes.
# Turn also % (power of 2) into & mask (oops, nope, negative doesn't work)
# Maybe turn != -1 into ~ in if()'s.
return
if code0 in self.assign_ops:
@ -345,10 +352,16 @@ class optimizer(object):
raise Exception('Internal error: This should not happen, node = ' + code0) # pragma: no cover
def optimize(self, symtab, functions):
def optimize(self, symtab, functions, options = ('optimize',)):
"""Optimize the symbolic table symtab in place. Requires a table of
predefined functions for folding constants.
"""
if 'optimize' not in options:
return
# TODO: Add option to handle local jumps properly.
self.functions = functions
self.symtab = symtab