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py2llvm: support type merge with empty list

This commit is contained in:
Sebastien Bourdeauducq 2014-12-19 15:19:59 +08:00
parent a9b28dff36
commit 5d40c2431e
2 changed files with 9 additions and 2 deletions
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2
artiq/py2llvm/ast_body.py
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@ -200,7 +200,7 @@ class Visitor:
for elt in elts[1:]: for elt in elts[1:]:
el_type.merge(elt) el_type.merge(elt)
else: else:
el_type = VNone() el_type = base_types.VNone()
count = len(elts) count = len(elts)
r = lists.VList(el_type, count) r = lists.VList(el_type, count)
r.elts = elts r.elts = elts

9
artiq/py2llvm/lists.py
View File

@ -30,7 +30,14 @@ class VList(VGeneric):
def merge(self, other): def merge(self, other):
if isinstance(other, VList): if isinstance(other, VList):
self.el_type.merge(other.el_type) if self.alloc_count:
if other.alloc_count:
self.el_type.merge(other.el_type)
if self.alloc_count < other.alloc_count:
self.alloc_count = other.alloc_count
else:
self.el_type = other.el_type.new()
self.alloc_count = other.alloc_count
else: else:
raise TypeError("Incompatible types: {} and {}" raise TypeError("Incompatible types: {} and {}"
.format(repr(self), repr(other))) .format(repr(self), repr(other)))