mirror of
https://github.com/Sei-Lisa/LSL-PyOptimizer
synced 2025-07-01 15:48:21 +00:00
8e5166bb2e
lsloptimizer remains as the "conductor" and option handler. As a result, new options have been added to enable DCR and constant folding.
83 lines
2.8 KiB
Python
83 lines
2.8 KiB
Python
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import lslfuncs
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from lslfuncs import Key, Vector, Quaternion
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from lslfoldconst import foldconst
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from lslrenamer import renamer
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from lsldeadcode import deadcode
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class optimizer(foldconst, renamer, deadcode):
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# Default values per type when declaring variables
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DefaultValues = {'integer': 0, 'float': 0.0, 'string': u'',
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'key': lslfuncs.Key(u''), 'vector': lslfuncs.ZERO_VECTOR,
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'rotation': lslfuncs.ZERO_ROTATION, 'list': []
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}
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# explicitly exclude assignments
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binary_ops = frozenset(('+','-','*','/','%','<<','>>','<','<=','>','>=',
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'==','!=','|','^','&','||','&&'))
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assign_ops = frozenset(('=','+=','-=','*=','/=','%=','&=','|=','^=','<<=','>>='))
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LSL2PythonType = {'integer':int, 'float':float, 'string':unicode, 'key':lslfuncs.Key,
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'vector':lslfuncs.Vector, 'rotation':lslfuncs.Quaternion, 'list':list}
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PythonType2LSL = {int: 'integer', float: 'float',
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unicode: 'string', Key: 'key', Vector: 'vector',
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Quaternion: 'rotation', list: 'list'}
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def Cast(self, value, newtype):
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# Return a CAST node if the types are not equal, otherwise the
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# value unchanged
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if value['t'] == newtype:
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return value
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if value not in ('CONST','()','FLD','IDENT','FNCALL','V++','V--',
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'VECTOR','ROTATION','LIST'):
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value = {'nt':'()', 't':newtype, 'ch':[value]}
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if 'SEF' in value['ch'][0]:
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value['SEF'] = True
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if 'X' in value['ch'][0]:
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value['X'] = value['ch'][0]['X']
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ret = {'nt':'CAST', 't':newtype, 'ch':[value]}
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if 'SEF' in value:
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ret['SEF'] = True
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if 'X' in value:
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ret['X'] = value['X']
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return ret
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def optimize(self, treesymtab, options = ('optimize','constfold','dcr')):
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"""Optimize the symbolic table symtab in place. Requires a table of
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predefined functions for folding constants.
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"""
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if 'optimize' not in options:
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return treesymtab
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self.foldtabs = 'foldtabs' in options
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self.shrinknames = 'shrinknames' in options
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self.constfold = 'constfold' in options
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self.dcr = 'dcr' in options
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tree, symtab = self.tree, self.symtab = treesymtab
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self.globalmode = False
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if self.constfold:
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self.FoldScript()
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if self.dcr:
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self.RemoveDeadCode()
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# Make another fold pass, since RemoveDeadCode can embed expressions
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# into other expressions and generate unoptimized code.
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if self.constfold:
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self.FoldScript()
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if self.shrinknames:
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self.ShrinkNames()
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treesymtab = (self.tree, self.symtab)
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del self.tree
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del self.symtab
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return treesymtab
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