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Fix optimization of fn > -1 and fn < 0 when fn's minimum is -1 in conditions

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E.g. llSubStringIndex(...) > -1 was converted into !~llSubStringIndex(...) which is incorrect. We even had a test case for it... with a wrong expected response file.

Bug report and test case by Sinha Hynes (thanks!)
This commit is contained in:
Sei Lisa 2019-07-16 01:58:19 +02:00
parent 1bdaff32ab
commit 1ab9dd69b4
2 changed files with 7 additions and 7 deletions
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12
lslopt/lslfoldconst.py
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@ -549,23 +549,23 @@ class foldconst(object):
sym = self.symtab[0][child[a].name]
break
# cond(FNCALL < 0) -> cond(~FNCALL) if min == -1
# cond(FNCALL < 0) -> cond(!~FNCALL) if min == -1
if (child[1].nt == 'CONST' and child[1].value == 0
and child[0].nt == 'FNCALL'
and 'min' in sym and sym['min'] == -1
):
node = parent[index] = nr(nt='~', t='integer',
ch=[child[0]])
node = parent[index] = nr(nt='!', t='integer',
ch=[nr(nt='~', t='integer', ch=[child[0]])])
self.FoldTree(parent, index)
return
# cond(FNCALL > -1) -> cond(!~FNCALL) if min == -1
# cond(FNCALL > -1) -> cond(~FNCALL) if min == -1
if (child[0].nt == 'CONST' and child[0].value == -1
and child[1].nt == 'FNCALL'
and 'min' in sym and sym['min'] == -1
):
node = parent[index] = nr(nt='!', t='integer',
ch=[nr(nt='~', t='integer', ch=[child[1]])])
node = parent[index] = nr(nt='~', t='integer',
ch=[child[1]])
self.FoldTree(parent, index)
return