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py2llvm: remove LLVM-crashing (unreachable) non-SSA path with exception ID

This commit is contained in:
Sebastien Bourdeauducq 2014-09-26 19:38:14 +08:00
parent 20ca97485c
commit 4978f8b3d7
1 changed files with 6 additions and 5 deletions
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11
artiq/py2llvm/ast_body.py
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@ -300,10 +300,11 @@ class Visitor:
eid = lc.Constant.int(lc.Type.int(), node.exc.args[0].n)
self.env.build_raise(self.builder, eid)
def _handle_exception(self, function, finally_block, propagate, handlers):
def _handle_exception(self, function, finally_block, propagate, propagate_eid, handlers):
eid = self.env.build_getid(self.builder)
self._eid_stack.append(eid)
self.builder.store(lc.Constant.int(lc.Type.int(1), 1), propagate)
self.builder.store(eid, propagate_eid)
for handler in handlers:
handled_exc_block = function.append_basic_block("try_exc_h")
@ -336,7 +337,6 @@ class Visitor:
self.builder.branch(finally_block)
self._eid_stack.pop()
return eid
def _visit_stmt_Try(self, node):
function = self.builder.basic_block.function
@ -346,6 +346,7 @@ class Visitor:
propagate = self.builder.alloca(lc.Type.int(1), name="propagate")
self.builder.store(lc.Constant.int(lc.Type.int(1), 0), propagate)
propagate_eid = self.builder.alloca(lc.Type.int(), name="propagate_eid")
exception_occured = self.env.build_catch(self.builder)
self.builder.cbranch(exception_occured, exc_block, noexc_block)
@ -359,8 +360,8 @@ class Visitor:
if not is_terminated(self.builder.basic_block):
self.builder.branch(finally_block)
self.builder.position_at_end(exc_block)
eid = self._handle_exception(function, finally_block, propagate,
node.handlers)
self._handle_exception(function, finally_block,
propagate, propagate_eid, node.handlers)
propagate_block = function.append_basic_block("try_propagate")
merge_block = function.append_basic_block("try_merge")
@ -371,6 +372,6 @@ class Visitor:
self.builder.load(propagate),
propagate_block, merge_block)
self.builder.position_at_end(propagate_block)
self.env.build_raise(self.builder, eid)
self.env.build_raise(self.builder, self.builder.load(propagate_eid))
self.builder.branch(merge_block)
self.builder.position_at_end(merge_block)