Commit b8d4929e authored by Stefan Behnel's avatar Stefan Behnel

avoid some unnecessary round trips when creating immutable objects

parent edb8f353
......@@ -1972,12 +1972,12 @@ class OptimizeBuiltinCalls(Visitor.MethodDispatcherTransform):
"""
if len(pos_args) != 1:
return node
list_arg = pos_args[0]
if list_arg.type is not Builtin.list_type:
arg = pos_args[0]
if arg.type is Builtin.tuple_type and not arg.may_be_none():
return arg
if arg.type is not Builtin.list_type:
return node
if not isinstance(list_arg, (ExprNodes.ComprehensionNode,
ExprNodes.ListNode)):
pos_args[0] = list_arg.as_none_safe_node(
pos_args[0] = arg.as_none_safe_node(
"'NoneType' object is not iterable")
return ExprNodes.PythonCapiCallNode(
......@@ -2031,6 +2031,8 @@ class OptimizeBuiltinCalls(Visitor.MethodDispatcherTransform):
pos_args = [ExprNodes.NullNode(node.pos)]
elif len(pos_args) > 1:
return node
elif pos_args[0].type is Builtin.frozenset_type and not pos_args[0].may_be_none():
return pos_args[0]
# PyFrozenSet_New(it) is better than a generic Python call to frozenset(it)
return ExprNodes.PythonCapiCallNode(
node.pos, "__Pyx_PyFrozenSet_New",
......
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