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When optimizing nonconst * const, cast the result to the type of the operator.

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Per bug report by @Welcius.

Fixes #8.
This commit is contained in:
Sei Lisa 2019-07-02 15:40:20 +02:00
parent 750465f17b
commit 1bdaff32ab
5 changed files with 46 additions and 5 deletions
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15
lslopt/lslfoldconst.py
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@ -1204,24 +1204,29 @@ class foldconst(object):
and b == 1 and val in (-1, 1)
):
if val == 1:
parent[index] = child[a]
parent[index] = self.Cast(child[a], optype)
self.FoldTree(parent, index)
return
if val == 0:
if child[a].SEF:
parent[index] = child[b]
parent[index] = self.Cast(child[b], optype)
self.FoldTree(parent, index)
return
if val == -1:
# Note 0.0*-1 equals -0.0 in LSL, so this is safe
node = parent[index] = nr(nt='NEG', t=node.t,
ch=[child[a]], SEF=child[a].SEF)
ch=[self.Cast(child[a], optype)],
SEF=child[a].SEF)
self.FoldTree(parent, index)
return
# only -2, 2 remain
if child[a].nt == 'IDENT' and self.isLocalVar(child[a]):
child[b] = child[a].copy()
child[b] = self.Cast(child[a].copy(), optype)
node.nt = '+'
if val == -2:
parent[index] = nr(nt='NEG', t=node.t,
parent[index] = nr(nt='NEG', t=optype,
ch=[node], SEF=node.SEF)
self.FoldTree(parent, index)
return
return