Python Builder.load方法代码示例

# 需要导入模块: from pykit.ir import Builder [as 别名]
# 或者: from pykit.ir.Builder import load [as 别名]
def run(func, env=None, return_block=None):
    """
    Rewrite 'ret' operations into jumps to a return block and assignments
    to a return variable.
    """
    b = Builder(func)
    return_block = return_block or func.new_block("pykit.return")

    # Allocate return variable
    if not func.type.restype.is_void:
        with b.at_front(func.startblock):
            return_var = b.alloca(types.Pointer(func.type.restype))
            b.store(Undef(func.type.restype), return_var)
    else:
        return_var = None

    # Repace 'ret' instructions with jumps and assignments
    for op in func.ops:
        if op.opcode == "ret":
            b.position_after(op)
            if return_var:
                b.store(op.args[0], return_var)
            b.jump(return_block)
            op.delete()

    with b.at_end(return_block):
        if return_var:
            result = b.load(return_var)
        else:
            result = None

        b.ret(result)

# 需要导入模块: from pykit.ir import Builder [as 别名]
# 或者: from pykit.ir.Builder import load [as 别名]
def rewrite_obj_return(func, env):
    """
    Handle returning stack-allocated objects.
    """
    if should_skip(env):
        return

    context = env['flypy.typing.context']
    restype = env['flypy.typing.restype']
    envs =  env['flypy.state.envs']

    builder = Builder(func)

    stack_alloc = representation.byref(restype)

    if stack_alloc:
        out = func.add_arg(func.temp("out"), opaque_t)
        context[out] = Pointer[restype]
        func.type = types.Function(types.Void, func.type.argtypes, False)

    for arg in func.args:
        arg.type = opaque_t
    func.type = types.Function(func.type.restype, (opaque_t,) * len(func.args),
                               False)

    is_generator = env['flypy.state.generator']
    for op in func.ops:
        if (op.opcode == 'ret' and op.args[0] is not None and
                stack_alloc and not is_generator):
            # ret val =>
            #     store (load val) out ; ret void
            [val] = op.args
            builder.position_before(op)
            newval = builder.load(val)
            builder.store(newval, out)
            op.set_args([None])

            # Update context
            context[newval] = StackVar[context[val]]

        elif op.opcode == 'call' and op.type != types.Void:
            # result = call(f, ...) =>
            #     alloca result ; call(f, ..., &result)
            ty = context[op]
            if conversion.byref(ty):
                f, args = op.args
                if not is_flypy_cc(f) or should_skip(envs[f]):
                    continue

                builder.position_before(op)
                retval = builder.alloca(opaque_t)
                builder.position_after(op)
                op.replace_uses(retval)

                newargs = args + [retval]
                op.set_args([f, newargs])

                # Update context
                context[retval] = context[op]
                context[op] = void

# 需要导入模块: from pykit.ir import Builder [as 别名]
# 或者: from pykit.ir.Builder import load [as 别名]
def lower_fields(func, env):
    b = Builder(func)
    opbuilder = OpBuilder()

    for op in func.ops:
        if op.opcode not in ("getfield", "setfield"):
            continue

        if op.args[0].type.is_pointer:
            b.position_before(op)

            # Load the pointer and update the argument
            p = op.args[0]
            load = b.load(p)
            args = [load] + op.args[1:]
            op.set_args(args)

            if op.opcode == "setfield":
                # Write back result
                b.position_after(op)
                op.type = load.type
                b.store(op, p)

        if op.opcode == "getfield":
            struct, attr = op.args
            newop = opbuilder.extractfield(op.type, struct, attr,
                                           result=op.result)
        else:
            struct, attr, value = op.args
            newop = opbuilder.insertfield(op.type, struct, attr, value,
                                          result=op.result)

        op.replace(newop)

# 需要导入模块: from pykit.ir import Builder [as 别名]
# 或者: from pykit.ir.Builder import load [as 别名]
class TestBuilder(unittest.TestCase):

    def setUp(self):
        self.f = Function("testfunc", ['a'],
                          types.Function(types.Float32, [types.Int32]))
        self.b = Builder(self.f)
        self.b.position_at_end(self.f.add_block('entry'))
        self.a = self.f.get_arg('a')

    def test_basic_builder(self):
        v = self.b.alloca(types.Pointer(types.Float32), [])
        result = self.b.mul(types.Int32, [self.a, self.a], result='r')
        c = self.b.convert(types.Float32, [result])
        self.b.store(c, v)
        val = self.b.load(types.Float32, [v])
        self.b.ret(val)
        # print(string(self.f))
        self.assertEqual(str(self.f).strip(), basic_expected)

    def test_splitblock(self):
        old, new = self.b.splitblock('newblock')
        with self.b.at_front(old):
            self.b.add(types.Int32, [self.a, self.a])
        with self.b.at_end(new):
            self.b.div(types.Int32, [self.a, self.a])
        # print(string(self.f))
        self.assertEqual(split_expected, string(self.f))

    def test_loop_builder(self):
        square = self.b.mul(types.Int32, [self.a, self.a])
        c = self.b.convert(types.Float32, [square])
        self.b.position_after(square)
        _, block = self.b.splitblock('start', terminate=True)
        self.b.position_at_end(block)

        const = partial(Const, type=types.Int32)
        cond, body, exit = self.b.gen_loop(const(5), const(10), const(2))
        with self.b.at_front(body):
            self.b.print_(c)
        with self.b.at_end(exit):
            self.b.ret(c)

        # print(string(self.f))
        # verify.verify(self.f)
        # self.assertEqual(loop_expected, string(self.f))

# TestBuilder('test_basic_builder').debug()
# TestBuilder('test_splitblock').debug()
# TestBuilder('test_loop_builder').debug()
# unittest.main()

# 需要导入模块: from pykit.ir import Builder [as 别名]
# 或者: from pykit.ir.Builder import load [as 别名]
def lower_fields(func, env=None):
    b = Builder(func)

    for op in func.ops:
        if op.opcode in ("getfield", "setfield") and op.args[0].type.is_pointer:
            b.position_before(op)
            p = op.args[0]
            load = b.load(p.type.base, [p])
            args = [load] + op.args[1:]
            op.set_args(args)

            if op.opcode == "setfield":
                b.position_after(op)
                b.store(op, p)

# 需要导入模块: from pykit.ir import Builder [as 别名]
# 或者: from pykit.ir.Builder import load [as 别名]
class TestBuilder(unittest.TestCase):

    def setUp(self):
        self.f = Function("testfunc", ['a'],
                          types.Function(types.Float32, [types.Int32]))
        self.b = Builder(self.f)
        self.b.position_at_end(self.f.new_block('entry'))
        self.a = self.f.get_arg('a')

    def test_basic_builder(self):
        v = self.b.alloca(types.Pointer(types.Float32), [])
        result = self.b.mul(types.Int32, [self.a, self.a], result='r')
        c = self.b.convert(types.Float32, [result])
        self.b.store(c, v)
        val = self.b.load(types.Float32, [v])
        self.b.ret(val)
        # print(string(self.f))
        assert interp.run(self.f, args=[10]) == 100

    def test_splitblock(self):
        old, new = self.b.splitblock('newblock')
        with self.b.at_front(old):
            self.b.add(types.Int32, [self.a, self.a])
        with self.b.at_end(new):
            self.b.div(types.Int32, [self.a, self.a])
        self.assertEqual(opcodes(self.f), ['add', 'div'])

    def test_loop_builder(self):
        square = self.b.mul(types.Int32, [self.a, self.a])
        c = self.b.convert(types.Float32, [square])
        self.b.position_after(square)
        _, block = self.b.splitblock('start', terminate=True)
        self.b.position_at_end(block)

        const = partial(Const, type=types.Int32)
        cond, body, exit = self.b.gen_loop(const(5), const(10), const(2))
        with self.b.at_front(body):
            self.b.print(c)
        with self.b.at_end(exit):
            self.b.ret(c)

        self.assertEqual(interp.run(self.f, args=[10]), 100.0)

# 需要导入模块: from pykit.ir import Builder [as 别名]
# 或者: from pykit.ir.Builder import load [as 别名]
def generate_copies(func, phis):
    """
    Emit stores to stack variables in predecessor blocks.
    """
    builder = Builder(func)
    vars = {}
    loads = {}

    # Allocate a stack variable for each phi
    builder.position_at_beginning(func.startblock)
    for block in phis:
        for phi in phis[block]:
            vars[phi] = builder.alloca(types.Pointer(phi.type))

    # Generate loads in blocks containing the phis
    for block in phis:
        leaders = list(block.leaders)
        last_leader = leaders[-1] if leaders else block.head
        builder.position_after(last_leader)
        for phi in phis[block]:
            loads[phi] = builder.load(vars[phi])

    # Generate copies (store to stack variables)
    for block in phis:
        for phi in phis[block]:
            preds, args = phi.args
            var = vars[phi]
            phi_args = [loads.get(arg, arg) for arg in args]
            for pred, arg in zip(preds, phi_args):
                builder.position_before(pred.terminator)
                builder.store(arg, var)

    # Replace phis
    for block in phis:
        for phi in phis[block]:
            phi.replace_uses(loads[phi])
            phi.delete()

    return vars, loads

# 需要导入模块: from pykit.ir import Builder [as 别名]
# 或者: from pykit.ir.Builder import load [as 别名]

#.........这里部分代码省略.........
            self.assignvar(argname, self.func.get_arg(argname))

        self.generic_visit(node.body)
        self.leave_func()

    # ______________________________________________________________________

    def visit_FuncCall(self, node):
        type = self.type
        opcode = node.name.name
        args = self.visits(node.args.exprs) if node.args else []

        if opcode == "list":
            return args
        elif not type and not ops.is_void(opcode):
            error(node, "Expected a type for sub-expression "
                        "(add a cast or assignment)")
        elif not hasattr(self.builder, opcode):
            if opcode in self.mod.functions:
                return self.builder.call(type, [self.mod.get_function(opcode),
                                                args])
            error(node, "No opcode %s" % (opcode,))

        buildop = getattr(self.builder, opcode)
        if ops.is_void(opcode):
            return buildop(*args)
        else:
            return buildop(type or "Unset", args)

    def visit_ID(self, node):
        if self.in_function:
            if node.name in self.local_vars:
                result = self.alloca(node.name)
                return self.builder.load(result.type.base, [result])

            global_val = (self.mod.get_function(node.name) or
                          self.mod.get_global(node.name))

            if not global_val:
                error(node, "Not a local or global: %r" % node.name)

            return global_val

    def visit_Cast(self, node):
        type = self.visit(node.to_type)
        if isinstance(node.expr, c_ast.FuncCall):
            op = self.visit(node.expr, type=type)
            op.type = type
            return op
        else:
            result = self.visit(node.expr)
            if result.type == type:
                return result
            return self.builder.convert(type, [result])

    def visit_Assignment(self, node):
        if node.op != '=':
            error(node, "Only assignment with '=' is supported")
        if not isinstance(node.lvalue, c_ast.ID):
            error(node, "Canot only assign to a name")
        self.assign(node.lvalue.name, node.rvalue)

    def visit_Constant(self, node):
        type = self.type_env[node.type]
        const = types.convert(node.value, types.resolve_typedef(type))
        if isinstance(const, basestring):

# 需要导入模块: from pykit.ir import Builder [as 别名]
# 或者: from pykit.ir.Builder import load [as 别名]
class TestBuilder(unittest.TestCase):

    def setUp(self):
        self.f = Function("testfunc", ['a'],
                          types.Function(types.Float32, [types.Int32], False))
        self.b = Builder(self.f)
        self.b.position_at_end(self.f.new_block('entry'))
        self.a = self.f.get_arg('a')

    def test_basic_builder(self):
        v = self.b.alloca(types.Pointer(types.Float32))
        result = self.b.mul(self.a, self.a, result='r')
        c = self.b.convert(types.Float32, result)
        self.b.store(c, v)
        val = self.b.load(v)
        self.b.ret(val)
        # print(string(self.f))
        assert interp.run(self.f, args=[10]) == 100

    def test_splitblock(self):
        old, new = self.b.splitblock('newblock')
        with self.b.at_front(old):
            self.b.add(self.a, self.a)
        with self.b.at_end(new):
            self.b.div(self.a, self.a)
        self.assertEqual(opcodes(self.f), ['add', 'div'])

    def test_loop_builder(self):
        square = self.b.mul(self.a, self.a)
        c = self.b.convert(types.Float32, square)
        self.b.position_after(square)
        _, block = self.b.splitblock('start', terminate=True)
        self.b.position_at_end(block)

        const = partial(Const, type=types.Int32)
        cond, body, exit = self.b.gen_loop(const(5), const(10), const(2))
        with self.b.at_front(body):
            self.b.print(c)
        with self.b.at_end(exit):
            self.b.ret(c)

        self.assertEqual(interp.run(self.f, args=[10]), 100.0)

    def test_splitblock_preserve_phis(self):
        """
        block1:
            %0 = mul a a
            jump(newblock)

        newblock:
            %1 = phi([block1], [%0])
            ret %1
        """
        square = self.b.mul(self.a, self.a)
        old, new = self.b.splitblock('newblock', terminate=True)
        with self.b.at_front(new):
            phi = self.b.phi(types.Int32, [self.f.startblock], [square])
            self.b.ret(phi)

        # Now split block1
        self.b.position_after(square)
        block1, split = self.b.splitblock(terminate=True)

        phi, ret = new.ops
        blocks, values = phi.args
        self.assertEqual(blocks, [split])

# 需要导入模块: from pykit.ir import Builder [as 别名]
# 或者: from pykit.ir.Builder import load [as 别名]

#.........这里部分代码省略.........

        name = node.decl.name
        type = self.visit(node.decl.type)
        argnames = [p.name for p in node.decl.type.args.params]
        self.func = Function(name, argnames, type)
        self.func.add_block('entry')
        self.builder = Builder(self.func)
        self.builder.position_at_end(self.func.blocks[0])
        self.generic_visit(node.body)

        self.leave_func()

    # ______________________________________________________________________

    def visit_FuncCall(self, node):
        name = node.name.name
        if not self.in_typed_context:
            error(node, "Expected a type for sub-expression "
                        "(add a cast or assignment)")
        if not hasattr(self.builder, name):
            error(node, "No opcode %s" % (name,))
        self.in_typed_context = False

        buildop = getattr(self.builder, name)
        args = self.visits(node.args.exprs)
        return buildop, args

    def visit_ID(self, node):
        if self.in_function:
            if node.name not in self.local_vars:
                error(node, "Not a local: %r" % node.name)

            result = self.alloca(node.name)
            return self.builder.load(result.type, result)

    def visit_Cast(self, node):
        type = self.visit(node.to_type)
        if isinstance(node.expr, c_ast.FuncCall):
            self.in_typed_context = True
            buildop, args = self.visit(node.expr)
            return buildop(type, args, "temp")
        else:
            result = self.visit(node.expr)
            if result.type == type:
                return result
            return self.builder.convert(type, [result], "temp")

    def visit_Assignment(self, node):
        if node.op != '=':
            error(node, "Only assignment with '=' is supported")
        if not isinstance(node.lvalue, c_ast.ID):
            error(node, "Canot only assign to a name")
        self.assign(node.lvalue.name, node.rvalue)

    def visit_Constant(self, node):
        type = self.type_env[node.type]
        const = types.convert(node.value, type)
        return Const(const)

    def visit_UnaryOp(self, node):
        op = defs.unary_defs[node.op]
        buildop = getattr(self.builder, op)
        arg = self.visit(node.expr)
        type = self.type or arg.type
        return buildop(type, [arg])