Commit 141c3303 authored by Stefan Behnel's avatar Stefan Behnel

generate shorter code for empty except blocks (ticket #251)

parent 4b446b49
...@@ -4218,6 +4218,7 @@ class ExceptClauseNode(Node): ...@@ -4218,6 +4218,7 @@ class ExceptClauseNode(Node):
exc_value = None exc_value = None
excinfo_target = None excinfo_target = None
empty_body = False
def analyse_declarations(self, env): def analyse_declarations(self, env):
if self.target: if self.target:
...@@ -4236,7 +4237,18 @@ class ExceptClauseNode(Node): ...@@ -4236,7 +4237,18 @@ class ExceptClauseNode(Node):
self.match_flag = env.allocate_temp(PyrexTypes.c_int_type) self.match_flag = env.allocate_temp(PyrexTypes.c_int_type)
self.pattern.release_temp(env) self.pattern.release_temp(env)
env.release_temp(self.match_flag) env.release_temp(self.match_flag)
self.exc_vars = [env.allocate_temp(py_object_type) for i in xrange(3)]
# most simple case: empty body (pass)
self.empty_body = not self.target and not self.excinfo_target and \
not getattr(self.body, 'stats', True)
if not self.empty_body:
self.exc_vars = [env.allocate_temp(py_object_type) for i in xrange(3)]
env.use_utility_code(get_exception_utility_code)
env.use_utility_code(restore_exception_utility_code)
else:
self.exc_vars = []
if self.target: if self.target:
self.exc_value = ExprNodes.ExcValueNode(self.pos, env, self.exc_vars[1]) self.exc_value = ExprNodes.ExcValueNode(self.pos, env, self.exc_vars[1])
self.exc_value.allocate_temps(env) self.exc_value.allocate_temps(env)
...@@ -4255,8 +4267,6 @@ class ExceptClauseNode(Node): ...@@ -4255,8 +4267,6 @@ class ExceptClauseNode(Node):
self.body.analyse_expressions(env) self.body.analyse_expressions(env)
for var in self.exc_vars: for var in self.exc_vars:
env.release_temp(var) env.release_temp(var)
env.use_utility_code(get_exception_utility_code)
env.use_utility_code(restore_exception_utility_code)
def generate_handling_code(self, code, end_label): def generate_handling_code(self, code, end_label):
code.mark_pos(self.pos) code.mark_pos(self.pos)
...@@ -4273,6 +4283,14 @@ class ExceptClauseNode(Node): ...@@ -4273,6 +4283,14 @@ class ExceptClauseNode(Node):
self.match_flag) self.match_flag)
else: else:
code.putln("/*except:*/ {") code.putln("/*except:*/ {")
if self.empty_body:
# most simple case: reset the exception state, done
code.putln("PyErr_Restore(0,0,0);")
code.put_goto(end_label)
code.putln("}")
return
code.putln('__Pyx_AddTraceback("%s");' % self.function_name) code.putln('__Pyx_AddTraceback("%s");' % self.function_name)
# We always have to fetch the exception value even if # We always have to fetch the exception value even if
# there is no target, because this also normalises the # there is no target, because this also normalises the
......
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