def test_regalloc_exitswitch_2(self):
v1 = Variable(); v1.concretetype = rclass.CLASSTYPE
v2 = Variable(); v2.concretetype = rclass.CLASSTYPE
v3 = Variable(); v3.concretetype = rclass.CLASSTYPE
v4 = Variable(); v4.concretetype = rclass.CLASSTYPE
block = Block([])
block.operations = [
SpaceOperation('res_call', [], v1),
SpaceOperation('-live-', [], None),
]
graph = FunctionGraph('f', block, v4)
exclink = Link([v2], graph.returnblock)
exclink.llexitcase = 123 # normally an exception class
exclink.last_exception = v2
exclink.last_exc_value = "unused"
block.exitswitch = c_last_exception
block.closeblock(Link([v1], graph.returnblock),
exclink)
#
self.check_assembler(graph, """
res_call -> %i0
-live-
catch_exception L1
int_return %i0
---
L1:
goto_if_exception_mismatch $123, L2
last_exception -> %i0
int_return %i0
---
L2:
reraise
""")
def copy_link(self, link, prevblock):
newargs = [self.get_new_name(a) for a in link.args] + self.passon_vars(prevblock)
newlink = Link(newargs, self.copy_block(link.target), link.exitcase)
newlink.last_exception = self.get_new_name(link.last_exception)
newlink.last_exc_value = self.get_new_name(link.last_exc_value)
if hasattr(link, 'llexitcase'):
newlink.llexitcase = link.llexitcase
return newlink
def copy_link(self, link, prevblock):
newargs = [self.get_new_name(a) for a in link.args] + self.passon_vars(prevblock)
newlink = Link(newargs, self.copy_block(link.target), link.exitcase)
newlink.last_exception = self.get_new_name(link.last_exception)
newlink.last_exc_value = self.get_new_name(link.last_exc_value)
if hasattr(link, 'llexitcase'):
newlink.llexitcase = link.llexitcase
return newlink
def generic_exception_matching(self, afterblock, copiedexceptblock):
#XXXXX don't look: insert blocks that do exception matching
#for the cases where direct matching did not work
exc_match = Constant(
self.translator.rtyper.exceptiondata.fn_exception_match)
exc_match.concretetype = typeOf(exc_match.value)
blocks = []
for i, link in enumerate(afterblock.exits[1:]):
etype = copyvar(None, copiedexceptblock.inputargs[0])
evalue = copyvar(None, copiedexceptblock.inputargs[1])
passon_vars = self.passon_vars(i)
block = Block([etype, evalue] + passon_vars)
res = Variable()
res.concretetype = Bool
cexitcase = Constant(link.llexitcase)
cexitcase.concretetype = typeOf(cexitcase.value)
args = [exc_match, etype, cexitcase]
block.operations.append(SpaceOperation("direct_call", args, res))
block.exitswitch = res
linkargs = self.find_args_in_exceptional_case(link, link.target,
etype, evalue, afterblock,
passon_vars)
l = Link(linkargs, link.target)
l.prevblock = block
l.exitcase = True
l.llexitcase = True
block.closeblock(l)
if i > 0:
l = Link(blocks[-1].inputargs, block)
l.exitcase = False
l.llexitcase = False
blocks[-1].recloseblock(l, *blocks[-1].exits)
blocks.append(block)
blocks[-1].recloseblock(*blocks[-1].exits[:1])
blocks[-1].operations = []
blocks[-1].exitswitch = None
blocks[-1].exits[0].exitcase = None
del blocks[-1].exits[0].llexitcase
linkargs = copiedexceptblock.inputargs
copiedexceptblock.recloseblock(Link(linkargs, blocks[0]))
def generic_exception_matching(self, afterblock, copiedexceptblock):
#XXXXX don't look: insert blocks that do exception matching
#for the cases where direct matching did not work
exc_match = Constant(
self.translator.rtyper.exceptiondata.fn_exception_match)
exc_match.concretetype = typeOf(exc_match.value)
blocks = []
for i, link in enumerate(afterblock.exits[1:]):
etype = copiedexceptblock.inputargs[0].copy()
evalue = copiedexceptblock.inputargs[1].copy()
passon_vars = self.passon_vars(i)
block = Block([etype, evalue] + passon_vars)
res = Variable()
res.concretetype = Bool
cexitcase = Constant(link.llexitcase)
cexitcase.concretetype = typeOf(cexitcase.value)
args = [exc_match, etype, cexitcase]
block.operations.append(SpaceOperation("direct_call", args, res))
block.exitswitch = res
linkargs = self.find_args_in_exceptional_case(link, link.target,
etype, evalue, afterblock,
passon_vars)
l = Link(linkargs, link.target)
l.prevblock = block
l.exitcase = True
l.llexitcase = True
block.closeblock(l)
if i > 0:
l = Link(blocks[-1].inputargs, block)
l.exitcase = False
l.llexitcase = False
blocks[-1].recloseblock(l, *blocks[-1].exits)
blocks.append(block)
blocks[-1].recloseblock(*blocks[-1].exits[:1])
blocks[-1].operations = []
blocks[-1].exitswitch = None
blocks[-1].exits[0].exitcase = None
del blocks[-1].exits[0].llexitcase
linkargs = copiedexceptblock.inputargs
copiedexceptblock.recloseblock(Link(linkargs, blocks[0]))
