mirror of https://github.com/m-labs/artiq.git
Remove `outer_final`
We don't need to know whether there's a outer finally block that's already implicit in the current break and continue target. Signed-off-by: Michael Birtwell <michael.birtwell@oxionics.com>
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@ -113,7 +113,6 @@ class ARTIQIRGenerator(algorithm.Visitor):
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self.return_target = None
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self.unwind_target = None
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self.catch_clauses = []
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self.outer_final = None
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self.final_branch = None
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self.function_map = dict()
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self.variable_map = dict()
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@ -468,7 +467,6 @@ class ARTIQIRGenerator(algorithm.Visitor):
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self.append(ir.BranchIf(cond, if_true, tail), block=head)
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def visit_While(self, node):
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old_outer_final, self.outer_final = self.outer_final, None
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try:
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head = self.add_block("while.head")
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self.append(ir.Branch(head))
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@ -488,7 +486,6 @@ class ARTIQIRGenerator(algorithm.Visitor):
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finally:
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self.break_target = old_break
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self.continue_target = old_continue
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self.outer_final = old_outer_final
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if any(node.orelse):
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else_tail = self.add_block("while.else")
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@ -563,7 +560,6 @@ class ARTIQIRGenerator(algorithm.Visitor):
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assert False
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def visit_ForT(self, node):
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old_outer_final, self.outer_final = self.outer_final, None
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try:
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iterable = self.visit(node.iter)
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length = self.iterable_len(iterable)
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@ -601,7 +597,6 @@ class ARTIQIRGenerator(algorithm.Visitor):
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finally:
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self.break_target = old_break
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self.continue_target = old_continue
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self.outer_final = old_outer_final
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if any(node.orelse):
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else_tail = self.add_block("for.else")
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@ -710,9 +705,7 @@ class ARTIQIRGenerator(algorithm.Visitor):
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value = return_action.append(ir.GetLocal(self.current_private_env, "$return"))
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return_action.append(ir.Return(value))
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final_branch(return_action, return_proxy)
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old_outer_final, self.outer_final = self.outer_final, final_branch
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elif self.outer_final is None:
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else:
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landingpad.has_cleanup = False
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# we should propagate the clauses to nested try catch blocks
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@ -777,7 +770,7 @@ class ARTIQIRGenerator(algorithm.Visitor):
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self.continue_target = old_continue
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self.return_target = old_return
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if any(node.finalbody) or self.outer_final is not None:
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if any(node.finalbody):
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# create new unwind target for cleanup
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final_dispatcher = self.add_block("try.final.dispatch")
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final_landingpad = ir.LandingPad(cleanup)
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@ -790,16 +783,6 @@ class ARTIQIRGenerator(algorithm.Visitor):
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# if we have a while:try/finally continue must execute finally
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# before continuing the while
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redirect = final_branch
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elif self.outer_final is not None:
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# If we have while:try/finally:try then we need to execute that finally
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# before the continuing the while
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# If we have try/finally:while:try then we should just continue the
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# while without having to execute the finally until later
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# If we have try/finally:while:try/finally:try we should execute
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# one but not the other
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# This is achieved by reseting self.outer_final in while and for
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# loops
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redirect = self.outer_final
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else:
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redirect = lambda dest, proxy: proxy.append(ir.Branch(dest))
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@ -860,7 +843,6 @@ class ARTIQIRGenerator(algorithm.Visitor):
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if any(node.finalbody):
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# Finalize and continue after try statement.
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self.outer_final = old_outer_final
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self.unwind_target = old_unwind
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# Exception path
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finalizer_reraise = self.add_block("finally.resume")
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@ -910,8 +892,6 @@ class ARTIQIRGenerator(algorithm.Visitor):
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block.append(ir.SetLocal(final_state, "$cont", tail))
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block.append(ir.Branch(finalizer))
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else:
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if self.outer_final is not None:
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self.unwind_target = old_unwind
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self.current_block = tail = self.add_block("try.tail")
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if not body.is_terminated():
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body.append(ir.Branch(tail))
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@ -0,0 +1,42 @@
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# RUN: %python -m artiq.compiler.testbench.jit %s >%t
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# RUN: OutputCheck %s --file-to-check=%t
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# REQUIRES: exceptions
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def run():
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loop = 0
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print("start")
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try:
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while True:
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print("loop")
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try:
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if loop == 0:
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loop += 1
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continue
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func()
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break
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except RuntimeError:
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print("except")
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return False
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finally:
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print("finally2")
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print("after-while")
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finally:
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print("finally1")
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print("exit")
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return True
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def func():
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print("func")
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# CHECK-L: start
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# CHECK-NEXT-L: loop
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# CHECK-NEXT-L: finally2
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# CHECK-NEXT-L: loop
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# CHECK-NEXT-L: func
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# CHECK-NEXT-L: finally2
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# CHECK-NEXT-L: after-while
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# CHECK-NEXT-L: finally1
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# CHECK-NEXT-L: exit
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run()
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@ -0,0 +1,42 @@
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# RUN: %python -m artiq.compiler.testbench.jit %s >%t
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# RUN: OutputCheck %s --file-to-check=%t
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# REQUIRES: exceptions
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def run():
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print("start")
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try:
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try:
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while True:
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print("loop")
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try:
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print("try")
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func()
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print("unreachable")
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return True
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except RuntimeError:
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print("except1")
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raise
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print("unreachable")
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finally:
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print("finally1")
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print("unreachable")
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return False
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except RuntimeError:
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print("except2")
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raise
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finally:
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print("finally2")
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return True
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def func():
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raise RuntimeError("Test")
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# CHECK-L: start
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# CHECK-NEXT-L: loop
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# CHECK-NEXT-L: try
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# CHECK-NEXT-L: except1
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# CHECK-NEXT-L: finally1
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# CHECK-NEXT-L: except2
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# CHECK-NEXT-L: finally2
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run()
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@ -0,0 +1,29 @@
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# RUN: %python -m artiq.compiler.testbench.jit %s >%t
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# RUN: OutputCheck %s --file-to-check=%t
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# REQUIRES: exceptions
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def run():
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try:
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while True:
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try:
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print("try")
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func()
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return True
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except RuntimeError:
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print("except")
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return False
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print("unreachable")
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finally:
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print("finally")
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print("unreachable")
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return False
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def func():
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pass
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# CHECK-L: try
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# CHECK-NOT-L: except
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# CHECK-NOT-L: unreachable
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# CHECK-L: finally
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run()
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