Python model.Block类代码示例

def test_optimize_goto_if_not__unknownop():
    v3 = Variable(); v3.concretetype = lltype.Bool
    block = Block([])
    block.operations = [SpaceOperation('foobar', [], v3)]
    block.exitswitch = v3
    block.exits = [FakeLink(False), FakeLink(True)]
    assert not Transformer().optimize_goto_if_not(block)

 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 test_func_simple():
    # -------------------- flowgraph building --------------------
    #     def f(x):
    #         return x+1
    x = Variable("x")
    x.concretetype = Signed
    result = Variable("result")
    result.concretetype = Signed
    one = Constant(1)
    one.concretetype = Signed
    op = SpaceOperation("int_add", [x, one], result)
    block = Block([x])
    graph = FunctionGraph("f", block)
    block.operations.append(op)
    block.closeblock(Link([result], graph.returnblock))
    graph.getreturnvar().concretetype = Signed
    # --------------------         end        --------------------
    
    F = FuncType([Signed], Signed)
    f = functionptr(F, "f", graph=graph)
    db = LowLevelDatabase()
    db.get(f)
    db.complete()
    dump_on_stdout(db)

    S = GcStruct('testing', ('fptr', Ptr(F)))
    s = malloc(S)
    s.fptr = f
    db = LowLevelDatabase()
    db.get(s)
    db.complete()
    dump_on_stdout(db)

    def get_resume_point_link(self, block):
        try:
            return self.resumepoints[block]
        except KeyError:
            resumeblock = Block([])
            redcount   = 0
            greencount = 0
            newvars = []
            for v in block.inputargs:
                if v.concretetype is lltype.Void:
                    v1 = self.c_dummy
                elif self.hannotator.binding(v).is_green():
                    c = inputconst(lltype.Signed, greencount)
                    v1 = self.genop(resumeblock, 'restore_green', [c],
                                    result_like = v)
                    greencount += 1
                else:
                    c = inputconst(lltype.Signed, redcount)
                    v1 = self.genop(resumeblock, 'restore_local', [c],
                                    result_like = v)
                    redcount += 1
                newvars.append(v1)

            resumeblock.closeblock(Link(newvars, block))
            reenter_link = Link([], resumeblock)
            N = len(self.resumepoints)
            reenter_link.exitcase = N
            self.resumepoints[block] = reenter_link
            return reenter_link

    def handle_oopspec_call(self, block, pos, withexc):
        op = block.operations[pos]
        assert op.opname == 'direct_call'
        if withexc:
            op.opname = 'oopspec_call'            
        else:
            op.opname = 'oopspec_call_noexc'            
        if withexc:
            link = split_block(self.hannotator, block, pos+1)
            nextblock = link.target
            linkargs = link.args
            v_residual  =self.genop(block, 'oopspec_was_residual', [],
                                    resulttype = lltype.Bool)
            residualblock = Block([])
            self.genswitch(block, v_residual, true = residualblock,
                                              false = None)
            link_f = block.exits[0]
            link_f.args = linkargs
            link_f.target = nextblock
            residualblock.closeblock(Link(linkargs, nextblock))
            blockset = { block: True,
                         nextblock: False,
                         residualblock: False }
            self.handle_after_residual_call_details(
                                  residualblock, 0, [], blockset, oop=True,
                                  withexc=True)

            SSA_to_SSI(blockset, self.hannotator)

 def new_block_before(self, block):
     newinputargs = [copyvar(self.hannotator, var)
                     for var in block.inputargs]
     newblock = Block(newinputargs)
     bridge = Link(newinputargs, block)
     newblock.closeblock(bridge)
     return newblock

 def builder(translator, func):
     # build a hacked graph that doesn't take a *arg any more, but
     # individual extra arguments
     graph = translator.buildflowgraph(func)
     argnames, vararg, kwarg = graph.signature
     assert vararg, "graph should have a *arg at this point"
     assert not kwarg, "where does this **arg come from??"
     argscopy = [Variable(v) for v in graph.getargs()]
     starargs = [Variable('stararg%d'%i) for i in range(nb_extra_args)]
     newstartblock = Block(argscopy[:-1] + starargs)
     newtup = SpaceOperation('newtuple', starargs, argscopy[-1])
     newstartblock.operations.append(newtup)
     newstartblock.closeblock(Link(argscopy, graph.startblock))
     graph.startblock.isstartblock = False
     graph.startblock = newstartblock
     newstartblock.isstartblock = True
     argnames += tuple(['.star%d' % i for i in range(nb_extra_args)])
     graph.signature = argnames, None, None
     # note that we can mostly ignore defaults: if nb_extra_args > 0, 
     # then defaults aren't applied.  if nb_extra_args == 0, then this 
     # just removes the *arg and the defaults keep their meaning.
     if nb_extra_args > 0:
         graph.defaults = None   # shouldn't be used in this case
     checkgraph(graph)
     return graph

 def naive_split_block(self, block, position):
     newblock = Block([])
     newblock.operations = block.operations[position:]
     del block.operations[position:]
     newblock.exitswitch = block.exitswitch
     block.exitswitch = None
     newblock.recloseblock(*block.exits)
     block.recloseblock(Link([], newblock))
     return newblock

 def copy_block(self, block):
     if block in self._copied_blocks:
         return self._copied_blocks[block]
     args = ([self.get_new_name(var) for var in block.inputargs] +
             self.passon_vars(block))
     newblock = Block(args)
     self._copied_blocks[block] = newblock
     newblock.operations = [self.copy_operation(op) for op in block.operations]
     newblock.closeblock(*[self.copy_link(link, block) for link in block.exits])
     newblock.exitswitch = self.get_new_name(block.exitswitch)
     self.search_for_calls(newblock)
     return newblock

    def handle_after_residual_call_details(self, block, pos, newops, blockset,
                                           withexc, oop = False):
        dopts = {'withexc': withexc, 'oop': oop }
        copts = Constant(dopts, lltype.Void)
        v_flags = self.genop(newops, 'after_residual_call', [copts],
                             resulttype=lltype.Signed, red=True)
        residual_fetch_index = len(newops)
        self.genop(newops, 'residual_fetch', [v_flags, copts])
        residual_fetch_pos = pos+residual_fetch_index
        block.operations[pos:pos+1] = newops

        link_t = split_block(self.hannotator, block, residual_fetch_pos)
        nextblock = link_t.target
        blockset[nextblock] = False
        i_flags = link_t.args.index(v_flags)

        reds, greens = self.sort_by_color(link_t.args)
        self.genop(block, 'save_locals', reds)

        SPLIT_FOR_ZERO = False

        if SPLIT_FOR_ZERO:
            promoteblock = Block([copyvar(self.hannotator, v)
                                  for v in link_t.args])
            link_f = Link(link_t.args, promoteblock)
            promoteblock.recloseblock(Link(promoteblock.inputargs, nextblock))
            blockset[promoteblock] = False
            v_flags2 = promoteblock.inputargs[i_flags]
        else:
            promoteblock = block
            v_flags2 = v_flags
        # if there is no global merge point, this 'promote' will actually
        # always see a constant red box
        v_finished_flag = self.genop(promoteblock, 'promote', [v_flags2],
                                     resulttype = lltype.Bool)
        self.go_to_dispatcher_if(promoteblock, v_finished_flag)

        if SPLIT_FOR_ZERO:
            c_zero = inputconst(lltype.Signed, 0)
            link_t.args = link_t.args[:]
            link_t.args[i_flags] = c_zero

            resumepoint = self.get_resume_point(promoteblock)
            c_resumepoint = inputconst(lltype.Signed, resumepoint)
            v_is_zero = self.genop(block, 'int_eq', [v_flags, c_zero],
                                   resulttype=lltype.Bool, red=True)
            v_is_zero = self.genop(block, 'split',
                                   [v_is_zero, c_resumepoint] + greens,
                                   resulttype = lltype.Bool)
            block.exitswitch = v_is_zero
            link_t.exitcase = True
            link_f.exitcase = False
            block.recloseblock(link_f, link_t)

def test_optimize_goto_if_not__ptr_iszero():
    for opname in ['ptr_iszero', 'ptr_nonzero']:
        v1 = Variable()
        v3 = Variable(); v3.concretetype = lltype.Bool
        block = Block([v1])
        block.operations = [SpaceOperation(opname, [v1], v3)]
        block.exitswitch = v3
        block.exits = exits = [FakeLink(False), FakeLink(True)]
        res = Transformer().optimize_goto_if_not(block)
        assert res == True
        assert block.operations == []
        assert block.exitswitch == (opname, v1, '-live-before')
        assert block.exits == exits

def test_rename_on_links():
    v1 = Variable()
    v2 = Variable()
    v3 = Variable()
    block = Block([v1])
    block.operations = [SpaceOperation('cast_pointer', [v1], v2)]
    block2 = Block([v3])
    block.closeblock(Link([v2], block2))
    Transformer().optimize_block(block)
    assert block.inputargs == [v1]
    assert block.operations == []
    assert block.exits[0].target is block2
    assert block.exits[0].args == [v1]

def normalize_calltable_row_annotation(annotator, graphs):
    if len(graphs) <= 1:
        return False   # nothing to do
    graph_bindings = {}
    for graph in graphs:
        graph_bindings[graph] = [annotator.binding(v)
                                 for v in graph.getargs()]
    iterbindings = graph_bindings.itervalues()
    nbargs = len(iterbindings.next())
    for binding in iterbindings:
        assert len(binding) == nbargs

    generalizedargs = []
    for i in range(nbargs):
        args_s = []
        for graph, bindings in graph_bindings.items():
            args_s.append(bindings[i])
        s_value = annmodel.unionof(*args_s)
        generalizedargs.append(s_value)
    result_s = [annotator.binding(graph.getreturnvar())
                for graph in graph_bindings]
    generalizedresult = annmodel.unionof(*result_s)

    conversion = False
    for graph in graphs:
        bindings = graph_bindings[graph]
        need_conversion = (generalizedargs != bindings)
        if need_conversion:
            conversion = True
            oldblock = graph.startblock
            inlist = []
            for j, s_value in enumerate(generalizedargs):
                v = Variable(graph.getargs()[j])
                annotator.setbinding(v, s_value)
                inlist.append(v)
            newblock = Block(inlist)
            # prepare the output args of newblock and link
            outlist = inlist[:]
            newblock.closeblock(Link(outlist, oldblock))
            oldblock.isstartblock = False
            newblock.isstartblock = True
            graph.startblock = newblock
            # finished
            checkgraph(graph)
            annotator.annotated[newblock] = annotator.annotated[oldblock]
        # convert the return value too
        if annotator.binding(graph.getreturnvar()) != generalizedresult:
            conversion = True
            annotator.setbinding(graph.getreturnvar(), generalizedresult)

    return conversion

def test_optimize_goto_if_not():
    v1 = Variable()
    v2 = Variable()
    v3 = Variable(); v3.concretetype = lltype.Bool
    sp1 = SpaceOperation('foobar', [], None)
    sp2 = SpaceOperation('foobaz', [], None)
    block = Block([v1, v2])
    block.operations = [sp1, SpaceOperation('int_gt', [v1, v2], v3), sp2]
    block.exitswitch = v3
    block.exits = exits = [FakeLink(False), FakeLink(True)]
    res = Transformer().optimize_goto_if_not(block)
    assert res == True
    assert block.operations == [sp1, sp2]
    assert block.exitswitch == ('int_gt', v1, v2)
    assert block.exits == exits

 def transform_jump_to_except_block(self, graph, entrymap, link):
     reraise = self.comes_from_last_exception(entrymap, link)
     result = Variable()
     result.concretetype = lltype.Void
     block = Block([copyvar(None, v) for v in graph.exceptblock.inputargs])
     if reraise:
         block.operations = [SpaceOperation("direct_call", [self.rpyexc_reraise_ptr] + block.inputargs, result)]
     else:
         block.operations = [
             SpaceOperation("direct_call", [self.rpyexc_raise_ptr] + block.inputargs, result),
             SpaceOperation("debug_record_traceback", [], varoftype(lltype.Void)),
         ]
     link.target = block
     RETTYPE = graph.returnblock.inputargs[0].concretetype
     l = Link([error_constant(RETTYPE)], graph.returnblock)
     block.recloseblock(l)