pypy / pypy / jit / codewriter /

from pypy.jit.codewriter import support, heaptracker
from pypy.jit.codewriter.regalloc import perform_register_allocation
from pypy.jit.codewriter.flatten import flatten_graph, KINDS
from pypy.jit.codewriter.assembler import Assembler, JitCode
from pypy.jit.codewriter.jtransform import transform_graph
from pypy.jit.codewriter.format import format_assembler
from pypy.jit.codewriter.liveness import compute_liveness
from import CallControl
from pypy.jit.codewriter.policy import log
from pypy.objspace.flow.model import copygraph
from pypy.tool.udir import udir

class CodeWriter(object):
    callcontrol = None    # for tests
    debug = False

    def __init__(self, cpu=None, jitdrivers_sd=[]):
        self.cpu = cpu
        self.assembler = Assembler()
        self.callcontrol = CallControl(cpu, jitdrivers_sd)
        self._seen_files = set()

    def transform_func_to_jitcode(self, func, values, type_system='lltype'):
        """For testing."""
        rtyper = support.annotate(func, values, type_system=type_system)
        graph = rtyper.annotator.translator.graphs[0]
        jitcode = JitCode("test")
        self.transform_graph_to_jitcode(graph, jitcode, True)
        return jitcode

    def transform_graph_to_jitcode(self, graph, jitcode, verbose):
        """Transform a graph into a JitCode containing the same bytecode
        in a different format.
        portal_jd = self.callcontrol.jitdriver_sd_from_portal_graph(graph)
        graph = copygraph(graph, shallowvars=True)
        # step 1: mangle the graph so that it contains the final instructions
        # that we want in the JitCode, but still as a control flow graph
        transform_graph(graph, self.cpu, self.callcontrol, portal_jd)
        # step 2: perform register allocation on it
        regallocs = {}
        for kind in KINDS:
            regallocs[kind] = perform_register_allocation(graph, kind)
        # step 3: flatten the graph to produce human-readable "assembler",
        # which means mostly producing a linear list of operations and
        # inserting jumps or conditional jumps.  This is a list of tuples
        # of the shape ("opname", arg1, ..., argN) or (Label(...),).
        ssarepr = flatten_graph(graph, regallocs)
        # step 3b: compute the liveness around certain operations
        # step 4: "assemble" it into a JitCode, which contains a sequence
        # of bytes and lists of constants.  It's during this step that
        # constants are cast to their normalized type (Signed, GCREF or
        # Float).
        self.assembler.assemble(ssarepr, jitcode)
        # print the resulting assembler
        if self.debug:
            self.print_ssa_repr(ssarepr, portal_jd, verbose)

    def make_jitcodes(self, verbose=False):"making JitCodes...")
        count = 0
        for graph, jitcode in self.callcontrol.enum_pending_graphs():
            self.transform_graph_to_jitcode(graph, jitcode, verbose)
            count += 1
            if not count % 500:
      "Produced %d jitcodes" % count)
        heaptracker.finish_registering(self.cpu)"there are %d JitCode instances." % count)

    def setup_vrefinfo(self, vrefinfo):
        # must be called at most once
        assert self.callcontrol.virtualref_info is None
        self.callcontrol.virtualref_info = vrefinfo

    def setup_jitdriver(self, jitdriver_sd):
        # Must be called once per jitdriver.  Usually jitdriver_sd is an
        # instance of pypy.jit.metainterp.jitdriver.JitDriverStaticData.

    def find_all_graphs(self, policy):
        return self.callcontrol.find_all_graphs(policy)

    def print_ssa_repr(self, ssarepr, portal_jitdriver, verbose):
        if verbose:
            print '%s:' % (,)
            print format_assembler(ssarepr)
        dir = udir.ensure("jitcodes", dir=1)
        if portal_jitdriver:
            name = "%02d_portal_runner" % (portal_jitdriver.index,)
        elif and != '?':
            name =
            name = 'unnamed' % id(ssarepr)
        i = 1
        extra = ''
        while name+extra in self._seen_files:
            i += 1
            extra = '.%d' % i
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