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Fix: if-else branch should terminate automatically. Insert unreachable to if.end block if necessary.

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This commit is contained in:
Siu Kwan Lam 2012-08-19 21:35:45 -07:00
commit 562e3c1e46
1 changed files with 4 additions and 0 deletions
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4
builder.py
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@ -97,11 +97,15 @@ class _IfElse(object):
self._to_close.append(self.parent.builder.basic_block) self._to_close.append(self.parent.builder.basic_block)
bbend = self.parent.function.append_basic_block('if.end') bbend = self.parent.function.append_basic_block('if.end')
builder = self.parent.builder builder = self.parent.builder
closed_count = 0
for bb in self._to_close: for bb in self._to_close:
if not _is_block_terminated(bb): if not _is_block_terminated(bb):
with _change_block_temporarily(builder, bb): with _change_block_temporarily(builder, bb):
builder.branch(bbend) builder.branch(bbend)
closed_count += 1
builder.position_at_end(bbend) builder.position_at_end(bbend)
if not closed_count:
self.parent.unreachable()
class _Loop(object): class _Loop(object):
'''while...do loop. '''while...do loop.