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Fix swaps and other misoptimizations

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This undoes 454d44e85f
This commit is contained in:
Sei Lisa 2019-01-11 02:07:54 +01:00
parent c3bb056f05
commit 42f47d38f0
3 changed files with 18 additions and 9 deletions
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19
lslopt/lsldeadcode.py
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@ -322,13 +322,18 @@ class deadcode(object):
node = sym['W']
nt = node.nt
while nt == 'IDENT':
# Follow the chain of identifiers all the way to the original
if self.symtab[node.scope][node.name].get('W', False) is False:
return sym
sym = self.symtab[node.scope][node.name]
node = sym['W']
nt = node.nt
# This screws up swaps. See
# unit_tests/regression.suite/aggressive-local-removal.lsl
# It can't be done without a reliable CFG-based method (SSA or
# the like).
# while nt == 'IDENT':
# # Follow the chain of identifiers all the way to the original
# if self.symtab[node.scope][node.name].get('W', False) is False:
# return sym
# sym = self.symtab[node.scope][node.name]
# node = sym['W']
# nt = node.nt
if nt == 'CONST':
tcurnode = curnode.t