[RUNTIME][PASS] Allow declare vector type array (#302)

* [RUNTIME][PASS] Allow declare vector type array

* fix bcast

* [BUFFER] Enable vload/store function in buffer

* ok

include/tvm/buffer.h

@@ -33,19 +33,6 @@ class Buffer : public NodeRef {
   Buffer() {}
   explicit Buffer(std::shared_ptr<Node> n) : NodeRef(n) {}
   /*!
-   * \brief Generate a load expression loading the index location of buffer.
-   * \param index The index to the buffer.
-   * \return The load expression.
-   */
-  Expr MakeLoad(Array<Expr> index) const;
-  /*!
-   * \brief Generate a store statement.
-   * \param index The index to the buffer.
-   * \param value The value to be stored.
-   * \return The load expression.
-   */
-  Stmt MakeStore(Array<Expr> index, Expr value) const;
-  /*!
    * \brief Return a new buffer that is equivalent with current one
    *  but always add stride field.
    * \return The strided version of the buffer.
@@ -67,6 +54,18 @@ class Buffer : public NodeRef {
    */
   Expr access_ptr(int access_mask, Type ptr_type = Handle()) const;
   /*!
+   * \brief Create an Expr that does a vector load at begin index.
+   * \param begin The beginning index
+   * \param dtype The data type to be loaded.
+   */
+  Expr vload(Array<Expr> begin, Type dtype) const;
+  /*!
+   * \brief Create a Stmt that does a vector store at begin index.
+   * \param begin The beginning index
+   * \param value The value to be stored.
+   */
+  Stmt vstore(Array<Expr> begin, Expr value) const;
+  /*!
    * \brief access the internal node container
    * \return the pointer to the internal node container
    */

python/tvm/_ffi/ndarray.py

@@ -142,17 +142,22 @@ class NDArrayBase(_NDArrayBase):
             if value.handle is not self.handle:
                 value.copyto(self)
         elif isinstance(value, (np.ndarray, np.generic)):
-            self._sync_copyfrom(value)
+            self.copyfrom(value)
         else:
             raise TypeError('type %s not supported' % str(type(value)))
 
-    def _sync_copyfrom(self, source_array):
+    def copyfrom(self, source_array):
         """Peform an synchronize copy from the array.
 
         Parameters
         ----------
         source_array : array_like
             The data source we should like to copy from.
+
+        Returns
+        -------
+        arr : NDArray
+            Reference to self.
         """
         if not isinstance(source_array, np.ndarray):
             try:
@@ -160,13 +165,21 @@ class NDArrayBase(_NDArrayBase):
             except:
                 raise TypeError('array must be an array_like data,' +
                                 'type %s is not supported' % str(type(source_array)))
-        source_array = np.ascontiguousarray(source_array, dtype=self.dtype)
-        if source_array.shape != self.shape:
-            raise ValueError('array shape do not match the shape of NDArray')
+        t = TVMType(self.dtype)
+        shape, dtype = self.shape, self.dtype
+        if t.lanes > 1:
+            shape = shape + (t.lanes,)
+            t.lanes = 1
+            dtype = str(t)
+        source_array = np.ascontiguousarray(source_array, dtype=dtype)
+        if source_array.shape != shape:
+            raise ValueError("array shape do not match the shape of NDArray {0} vs {1}".format(
+                source_array.shape, shape))
         assert source_array.flags['C_CONTIGUOUS']
         data = source_array.ctypes.data_as(ctypes.c_void_p)
         nbytes = ctypes.c_size_t(np.prod(source_array.shape) * source_array.dtype.itemsize)
         check_call(_LIB.TVMArrayCopyFromBytes(self.handle, data, nbytes))
+        return self
 
     def asnumpy(self):
         """Convert this array to numpy array
@@ -176,7 +189,13 @@ class NDArrayBase(_NDArrayBase):
         np_arr : numpy.ndarray
             The corresponding numpy array.
         """
-        np_arr = np.empty(self.shape, dtype=self.dtype)
+        t = TVMType(self.dtype)
+        shape, dtype = self.shape, self.dtype
+        if t.lanes > 1:
+            shape = shape + (t.lanes,)
+            t.lanes = 1
+            dtype = str(t)
+        np_arr = np.empty(shape, dtype=dtype)
         assert np_arr.flags['C_CONTIGUOUS']
         data = np_arr.ctypes.data_as(ctypes.c_void_p)
         nbytes = ctypes.c_size_t(np.prod(np_arr.shape) * np_arr.dtype.itemsize)
@@ -188,7 +207,7 @@ class NDArrayBase(_NDArrayBase):
 
         Parameters
         ----------
-        target : tvm.NDArray
+        target : NDArray
             The target array to be copied, must have same shape as this array.
         """
         if isinstance(target, TVMContext):

python/tvm/_ffi/runtime_ctypes.py

@@ -41,30 +41,36 @@ class TVMType(ctypes.Structure):
         2 : 'float',
         4 : 'handle'
     }
-    def __init__(self, type_str, lanes=1):
+    def __init__(self, type_str):
         super(TVMType, self).__init__()
         if isinstance(type_str, np.dtype):
             type_str = str(type_str)
-        if type_str.startswith("int"):
+        arr = type_str.split("x")
+        head = arr[0]
+        self.lanes = int(arr[1]) if len(arr) > 1 else 1
+        bits = 32
+
+        if head.startswith("int"):
             self.type_code = 0
-            bits = int(type_str[3:])
-        elif type_str.startswith("uint"):
+            head = head[3:]
+        elif head.startswith("uint"):
             self.type_code = 1
-            bits = int(type_str[4:])
-        elif type_str.startswith("float"):
+            head = head[4:]
+        elif head.startswith("float"):
             self.type_code = 2
-            bits = int(type_str[5:])
-        elif type_str.startswith("handle"):
+            head = head[5:]
+        elif head.startswith("handle"):
             self.type_code = 4
             bits = 64
+            head = ""
         else:
             raise ValueError("Donot know how to handle type %s" % type_str)
 
-        bits = 32 if bits == 0 else bits
+        bits = int(head) if head else bits
         if (bits & (bits - 1)) != 0 or bits < 8:
             raise ValueError("Donot know how to handle type %s" % type_str)
         self.bits = bits
-        self.lanes = lanes
+
 
     def __repr__(self):
         x = "%s%d" % (TVMType.CODE2STR[self.type_code], self.bits)

python/tvm/api.py

@@ -10,6 +10,7 @@ from ._ffi.node import convert_to_node as _convert_to_node
 from ._ffi.function import Function
 from ._ffi.function import _init_api, register_func, get_global_func
 from ._ffi.function import convert_to_tvm_func as _convert_tvm_func
+from ._ffi.runtime_ctypes import TVMType
 from . import _api_internal
 from . import make as _make
 from . import expr as _expr
@@ -546,22 +547,6 @@ def reduce_axis(dom, name="rv"):
     """
     return _IterVar(dom, name, 2)
 
-def cast(dtype, expr):
-    """Cast an expression to other type
-    Parameters
-    ----------
-    dtype : str, optional
-        The type of new expression
-    expr : Expr
-        The expression
-
-    Returns
-    -------
-    expr : Expr
-        Expression with new type
-    """
-    return _make.Cast(dtype, expr)
-
 
 def select(cond, t, f):
     """Construct a select branch

python/tvm/expr.py

@@ -97,10 +97,11 @@ class ExprOp(object):
         return _make.EQ(self, other)
 
     def astype(self, dtype):
-        """Cast the expression to other type
+        """Cast the expression to other type.
+
         Parameters
         ----------
-        dtype : str, optional
+        dtype : str
             The type of new expression
 
         Returns
@@ -108,7 +109,7 @@ class ExprOp(object):
         expr : Expr
             Expression with new type
         """
-        return _make.Cast(dtype, self)
+        return _make.static_cast(dtype, self)
 
 
 class Expr(NodeBase, ExprOp):

python/tvm/ir_builder.py

@@ -9,6 +9,7 @@ from . import ir_pass as _pass
 from . import container as _container
 from ._ffi.base import string_types
 from ._ffi.node import NodeGeneric
+from ._ffi.runtime_ctypes import TVMType
 from .expr import Call as _Call
 
 class WithScope(object):
@@ -56,7 +57,14 @@ class BufferVar(NodeGeneric):
     def asnode(self):
         return self._buffer_var
 
+    @property
+    def dtype(self):
+        return self._content_type
+
     def __getitem__(self, index):
+        t = TVMType(self._content_type)
+        if t.lanes > 1:
+            index = _make.Ramp(index * t.lanes, 1, t.lanes)
         return _make.Load(self._content_type, self._buffer_var, index)
 
     def __setitem__(self, index, value):
@@ -65,6 +73,9 @@ class BufferVar(NodeGeneric):
             raise ValueError(
                 "data type does not match content type %s vs %s" % (
                     value.dtype, self._content_type))
+        t = TVMType(self._content_type)
+        if t.lanes > 1:
+            index = _make.Ramp(index * t.lanes, 1, t.lanes)
         self._builder.emit(_make.Store(self._buffer_var, value, index))
 
 

python/tvm/make.py

@@ -7,6 +7,7 @@ Each api is a PackedFunc that can be called in a positional argument manner.
 You can use make function to build the IR node.
 """
 from ._ffi.function import _init_api
+from ._ffi.runtime_ctypes import TVMType
 from . import stmt as _stmt
 
 def range_by_min_extent(min_value, extent):
@@ -30,6 +31,34 @@ def range_by_min_extent(min_value, extent):
     return _range_by_min_extent(min_value, extent)
 
 
+def static_cast(dtype, expr):
+    """Cast expr to dtype.
+
+    If expr is scalar and dtype is a corresponding vector
+    type, a Broadcast is generated. Otherwise it is a Cast.
+
+    Parameters
+    ----------
+    dtype : str
+        The target data type.
+
+    expr : Expr
+        The expression to be casted.
+
+    Returns
+    -------
+    casted : Expr
+        The casted expression.
+    """
+    target_type = TVMType(dtype)
+    src_type = TVMType(expr.dtype)
+    if target_type.type_code == src_type.type_code\
+       and src_type.lanes == 1\
+       and target_type.lanes > 1:
+        return Broadcast(expr, target_type.lanes)
+    return Cast(dtype, expr)
+
+
 def node(type_key, **kwargs):
     """Make a new DSL node by its type key and fields
 

python/tvm/ndarray.py

@@ -126,8 +126,6 @@ def array(arr, ctx=cpu(0)):
     """
     if not isinstance(arr, _np.ndarray):
         arr = _np.array(arr)
-    ret = empty(arr.shape, arr.dtype, ctx)
-    ret[:] = arr
-    return ret
+    return empty(arr.shape, arr.dtype, ctx).copyfrom(arr)
 
 _set_class_ndarray(NDArray)

python/tvm/schedule.py

@@ -65,6 +65,46 @@ class Buffer(NodeBase):
             access_mask = mask
         return _api_internal._BufferAccessPtr(self, access_mask, ptr_type)
 
+    def vload(self, begin, dtype=None):
+        """Generate an Expr that loads dtype from begin index.
+
+        Parameters
+        ----------
+        begin : Array of Expr
+            The beginning index in unit of Buffer.dtype
+
+        dtype : str
+            The data type to be loaded,
+            can be vector type which have lanes that is multiple of Buffer.dtype
+
+        Returns
+        -------
+        load : Expr
+            The corresponding load expression.
+        """
+        begin = (begin,) if isinstance(begin, (int, _expr.Expr)) else begin
+        dtype = dtype if dtype else self.dtype
+        return _api_internal._BufferVLoad(self, begin, dtype)
+
+    def vstore(self, begin, value):
+        """Generate a Stmt that store value into begin index.
+
+        Parameters
+        ----------
+        begin : Array of Expr
+            The beginning index in unit of Buffer.dtype
+
+        value : Expr
+            The value to be stored.
+
+        Returns
+        -------
+        store : Stmt
+            The corresponding store stmt.
+        """
+        begin = (begin,) if isinstance(begin, (int, _expr.Expr)) else begin
+        return _api_internal._BufferVStore(self, begin, value)
+
 
 @register_node
 class Split(NodeBase):

src/api/api_lang.cc

@@ -162,6 +162,18 @@ TVM_REGISTER_API("_BufferAccessPtr")
         .access_ptr(args[1], args[2]);
   });
 
+TVM_REGISTER_API("_BufferVLoad")
+.set_body([](TVMArgs args,  TVMRetValue* ret) {
+    *ret = args[0].operator Buffer()
+        .vload(args[1], args[2]);
+  });
+
+TVM_REGISTER_API("_BufferVStore")
+.set_body([](TVMArgs args,  TVMRetValue* ret) {
+    *ret = args[0].operator Buffer()
+        .vstore(args[1], args[2]);
+  });
+
 TVM_REGISTER_API("_Tensor")
 .set_body([](TVMArgs args,  TVMRetValue* ret) {
     *ret = TensorNode::make(args[0],

src/lang/buffer.cc

@@ -61,27 +61,38 @@ inline Expr ElemOffset(const BufferNode* n, Array<Expr> index) {
   return base;
 }
 
-// Buffer access offset.
-inline Expr BufferOffset(const BufferNode* n, Array<Expr> index) {
+inline Expr BufferOffset(const BufferNode* n, Array<Expr> index, Type dtype) {
   Expr offset = ElemOffset(n, index);
   if (n->dtype.lanes() != 1) {
-    offset = offset * make_const(offset.type(), n->dtype.lanes());
+    offset = offset * make_const(offset.type(), dtype.lanes());
+  }
+  if (dtype.lanes() != 1) {
+    return ir::Ramp::make(offset, make_const(offset.type(), 1), dtype.lanes());
+  } else {
+    return offset;
   }
-  return offset;
 }
 
-Expr Buffer::MakeLoad(Array<Expr> index) const {
+Expr Buffer::vload(Array<Expr> begin, Type dtype) const {
   const BufferNode* n = operator->();
+  CHECK(dtype.element_of() == n->dtype.element_of() &&
+        dtype.lanes() % n->dtype.lanes() == 0)
+      << "Cannot load " << dtype
+      << " from buffer of " << n->dtype;
   return ir::Load::make(
-      n->dtype, n->data, BufferOffset(n, index),
-      const_true(n->dtype.lanes()));
+      dtype, n->data, BufferOffset(n, begin, dtype),
+      const_true(dtype.lanes()));
 }
 
-Stmt Buffer::MakeStore(Array<Expr> index, Expr value) const {
+Stmt Buffer::vstore(Array<Expr> begin, Expr value) const {
   const BufferNode* n = operator->();
-  CHECK_EQ(value.type(), n->dtype);
-  return ir::Store::make(n->data, value, BufferOffset(n, index),
-                         const_true(n->dtype.lanes()));
+  Type dtype = value.type();
+  CHECK(dtype.element_of() == n->dtype.element_of() &&
+        dtype.lanes() % n->dtype.lanes() == 0)
+      << "Cannot load " << dtype
+      << " from buffer of " << n->dtype;
+  return ir::Store::make(n->data, value, BufferOffset(n, begin, dtype),
+                         const_true(dtype.lanes()));
 }
 
 Buffer Buffer::MakeStrideView() const {

src/pass/storage_flatten.cc

@@ -75,7 +75,7 @@ class StorageFlattener : public IRMutator {
     const BufferEntry& e = it->second;
     CHECK(!e.released)
         << "Read a buffer that is already out of scope";
-    return e.buffer.MakeStore(e.RelIndex(op->args), op->value);
+    return e.buffer.vstore(e.RelIndex(op->args), op->value);
   }
 
   Stmt Mutate_(const Realize* op, const Stmt& s) final {
@@ -165,7 +165,7 @@ class StorageFlattener : public IRMutator {
       const BufferEntry& e = it->second;
       CHECK(!e.released)
           << "Read a buffer that is already out of scope";
-      return e.buffer.MakeLoad(e.RelIndex(op->args));
+      return e.buffer.vload(e.RelIndex(op->args), e.buffer->dtype);
     } else {
       return expr;
     }
@@ -216,7 +216,7 @@ class StorageFlattener : public IRMutator {
         stmt = For::make(
             vars[i], 0, op->bounds[i]->extent, ForType::Serial, DeviceAPI::Host, stmt);
       } else {
-        Expr load = e.buffer.MakeLoad(e.RelIndex(args));
+        Expr load = e.buffer.vload(e.RelIndex(args), e.buffer->dtype);
         Expr address = Call::make(Handle(), tvm_address_of, {load}, Call::PureIntrinsic);
         Expr prefetch = Call::make(op->type, Call::prefetch, {address, 0, 3, 1}, Call::Intrinsic);
         stmt = Evaluate::make(prefetch);

src/pass/storage_rewrite.cc

@@ -594,8 +594,70 @@ class StoragePlanRewriter : public IRMutator {
   std::vector<std::unique_ptr<StorageEntry> > alloc_vec_;
 };
 
+// Turn alloc into vector alloc
+// if all its access is the same vector type.
+class VectorAllocRewriter : public IRMutator {
+ public:
+  Expr Mutate_(const Load* op, const Expr& e) final {
+    UpdateTypeMap(op->buffer_var.get(), op->type);
+    return IRMutator::Mutate_(op, e);
+  }
+
+  Stmt Mutate_(const Store* op, const Stmt& s) final {
+    UpdateTypeMap(op->buffer_var.get(), op->value.type());
+    return IRMutator::Mutate_(op, s);
+  }
+  Expr Mutate_(const Call* op, const Expr& e) final {
+    if (op->is_intrinsic(intrinsic::tvm_access_ptr)) {
+      Type dtype = op->args[0].type();
+      const Variable* buffer = op->args[1].as<Variable>();
+      UpdateTypeMap(buffer, dtype);
+    }
+    return IRMutator::Mutate_(op, e);
+  }
+
+  Stmt Mutate_(const Allocate* op, const Stmt& s) final {
+    Stmt stmt = IRMutator::Mutate_(op, s);
+    op = stmt.as<Allocate>();
+    const auto& tvec = acc_map_[op->buffer_var.get()];
+
+    if (tvec.size() == 1 &&
+        tvec[0].element_of() == op->type.element_of() &&
+        tvec[0].lanes() % op->type.lanes() == 0 &&
+        tvec[0].lanes() != op->type.lanes()) {
+      int factor = tvec[0].lanes() / op->type.lanes();
+      Array<Expr> extents = op->extents;
+      arith::ModularEntry me = EvalModular(
+          extents[extents.size() - 1],
+          std::unordered_map<const Variable*, arith::ModularEntry>());
+      if (me.base % factor == 0 && me.coeff % factor == 0) {
+        extents.Set(extents.size() - 1,
+                    extents[extents.size() - 1] / make_const(extents[0].type(), factor));
+        return Allocate::make(
+            op->buffer_var, tvec[0], extents,
+            op->condition, op->body);
+      }
+    }
+    return stmt;
+  }
+
+
+ private:
+  void UpdateTypeMap(const Variable* buffer, Type t) {
+    auto& tvec = acc_map_[buffer];
+    if (std::find(tvec.begin(), tvec.end(), t) == tvec.end()) {
+      tvec.push_back(t);
+    }
+  }
+  // Internal access map
+  std::unordered_map<const Variable*,
+                     std::vector<Type> > acc_map_;
+};
+
+
 Stmt StorageRewrite(Stmt stmt) {
-  return StoragePlanRewriter().Rewrite(stmt);
+  stmt = StoragePlanRewriter().Rewrite(stmt);
+  return VectorAllocRewriter().Mutate(stmt);
 }
 }  // namespace ir
 }  // namespace tvm

src/pass/vectorize_loop.cc

@@ -16,6 +16,11 @@ namespace ir {
 
 inline Expr BroadcastTo(Expr e, int lanes) {
   if (e.type().lanes() == lanes) return e;
+  if (const Broadcast* op = e.as<Broadcast>()) {
+    if (lanes % op->lanes == 0) {
+      return Broadcast::make(op->value, lanes);
+    }
+  }
   CHECK_EQ(e.type().lanes(), 1)
       << "Cannot broadcast lane=" << e.type().lanes()
       << " to " << lanes;
@@ -79,6 +84,27 @@ class Vectorizer : public IRMutator {
     return AddSubVec(op, e);
   }
   Expr Mutate_(const Mul* op, const Expr &e) final {
+    Expr a = this->Mutate(op->a);
+    Expr b = this->Mutate(op->b);
+    if (a.same_as(op->a) &&
+        b.same_as(op->b)) {
+      return e;
+    } else {
+      int lanes = std::max(a.type().lanes(), b.type().lanes());
+      if (lanes != 1) {
+        const Ramp* b_ramp = b.as<Ramp>();
+        const Ramp* a_ramp = a.as<Ramp>();
+        if (a_ramp && b.type().lanes() == 1 && can_prove(b > 0)) {
+          return Ramp::make(
+              a_ramp->base * b, a_ramp->stride * b, a_ramp->lanes);
+        }
+        if (b_ramp && a.type().lanes() == 1 && can_prove(a > 0)) {
+          return Ramp::make(
+              b_ramp->base * a, b_ramp->stride * a, b_ramp->lanes);
+        }
+      }
+      return Mul::make(BroadcastTo(a, lanes), BroadcastTo(b, lanes));
+    }
     return BinaryVec(op, e);
   }
   Expr Mutate_(const Div* op, const Expr &e) final {
@@ -114,6 +140,27 @@ class Vectorizer : public IRMutator {
   Expr Mutate_(const Or* op, const Expr &e) final {
     return BinaryVec(op, e);
   }
+  Expr Mutate_(const Ramp* op, const Expr &e) final {
+    Expr base = this->Mutate(op->base);
+    Expr stride = this->Mutate(op->stride);
+    if (base.type().lanes() > 1 && stride.type().lanes() == 1) {
+      const Ramp* base_ramp = base.as<Ramp>();
+      if (can_prove(base_ramp->stride == stride * make_const(stride.type(), op->lanes))) {
+        return Ramp::make(base_ramp->base, stride, op->lanes * base_ramp->lanes);
+      }
+    }
+    int lanes = std::max(base.type().lanes(), stride.type().lanes());
+    base = BroadcastTo(base, lanes);
+    stride = BroadcastTo(stride, lanes);
+    Array<Expr> elems;
+    for (size_t i = 0; i < lanes; ++i) {
+      elems.push_back(
+          Ramp::make(Shuffle::make_extract_element(base, i),
+                     Shuffle::make_extract_element(stride, i),
+                     op->lanes));
+    }
+    return Shuffle::make_concat(elems);
+  }
   Expr Mutate_(const Select *op, const Expr& e) final {
     Expr cond = this->Mutate(op->condition);
     Expr t = this->Mutate(op->true_value);

tests/python/unittest/test_codegen_extern.py

@@ -9,10 +9,8 @@ def test_add_pipeline():
     def extern_generator(ins, outs):
         """Manually write the IR for the extern function, add pipeline"""
         ib = tvm.ir_builder.create()
-        dout = ib.buffer_ptr(outs[0])
-        din = ib.buffer_ptr(ins[0])
-        with ib.for_range(0, n) as i:
-            dout[i] = din[i] + 1
+        with ib.for_range(0, n/2) as i:
+            ib.emit(outs[0].vstore(i*2, ins[0].vload(i*2, "float32x2") + tvm.const(1, "float32x2")))
         return ib.get()
 
     C = tvm.extern(A.shape, [A], extern_generator, name='C')

tests/python/unittest/test_codegen_llvm.py

@@ -88,6 +88,32 @@ def test_llvm_flip_pipeline():
     check_llvm(128, 1)
 
 
+def test_llvm_vadd_pipeline():
+    def check_llvm(n, lanes):
+        if not tvm.module.enabled("llvm"):
+            return
+        A = tvm.placeholder((n,), name='A', dtype="float32x%d" % lanes)
+        B = tvm.compute((n,), lambda i: A[i], name='B')
+        C = tvm.compute((n,), lambda i: B[i] + tvm.const(1, A.dtype), name='C')
+        s = tvm.create_schedule(C.op)
+        xo, xi = s[C].split(C.op.axis[0], factor=2)
+        s[C].parallel(xo)
+        s[C].vectorize(xi)
+        xo, xi = s[B].split(B.op.axis[0], factor=2)
+        s[B].vectorize(xi)
+        # build and invoke the kernel.
+        f = tvm.build(s, [A, C], "llvm")
+        ctx = tvm.cpu(0)
+        # launch the kernel.
+        a = tvm.nd.empty((n,), A.dtype).copyfrom(
+            np.random.uniform(size=(n, lanes)))
+        c = tvm.nd.empty((n,), C.dtype, ctx)
+        f(a, c)
+        np.testing.assert_allclose(
+            c.asnumpy(), a.asnumpy() + 1)
+    check_llvm(64, 2)
+
+
 def test_llvm_madd_pipeline():
     def check_llvm(nn, base, stride):
         if not tvm.module.enabled("llvm"):
@@ -114,6 +140,7 @@ def test_llvm_madd_pipeline():
     with tvm.build_config(restricted_func=False):
         check_llvm(4, 0, 3)
 
+
 def test_llvm_temp_space():
     nn = 1024
     n = tvm.convert(nn)
@@ -172,6 +199,7 @@ def test_multiple_func():
 
 
 if __name__ == "__main__":
+    test_llvm_vadd_pipeline()
     test_llvm_add_pipeline()
     test_llvm_intrin()
     test_multiple_func()

tests/python/unittest/test_lang_basic.py

@@ -31,6 +31,15 @@ def test_let():
     stmt = tvm.make.LetStmt(
         x, 10, tvm.make.Evaluate(x + 1));
 
+def test_cast():
+    x = tvm.var('x', dtype="float32")
+    y = x.astype("int32")
+    z = x.astype("float32x4")
+    assert isinstance(y, tvm.expr.Cast)
+    assert isinstance(z, tvm.expr.Broadcast)
+    assert z.lanes == 4
+
+
 def test_attr():
     x = tvm.var('x')
     y = tvm.var('y')
@@ -116,6 +125,7 @@ def test_all():
 
 
 if __name__ == "__main__":
+    test_cast()
     test_attr()
     test_const()
     test_make()

tests/python/unittest/test_lang_tensor.py

@@ -16,7 +16,6 @@ def test_tensor():
     assert(T.op.output(0).__hash__() == T.__hash__())
     d = {T.op.output(0) : 1}
     assert(d[T] == 1)
-    assert(tvm.cast('float16', T[0][0][0]).dtype == 'float16')
     assert(T[0][0][0].astype('float16').dtype == 'float16')
 
 

tests/python/unittest/test_pass_vectorize.py

@@ -7,8 +7,9 @@ def test_vectorize_loop():
     A = ib.pointer("float32", name="A")
     with ib.for_range(0, n) as i:
         with ib.for_range(0, 4, for_type="vectorize") as j:
-            A[j + 1] = A[i] + 1
+            A[j] = tvm.const(1, A.dtype)
     stmt = ib.get()
+
     assert isinstance(stmt.body, tvm.stmt.For)
     stmt = tvm.ir_pass.VectorizeLoop(stmt)
     assert isinstance(stmt, tvm.stmt.For)
@@ -16,6 +17,23 @@ def test_vectorize_loop():
     assert isinstance(stmt.body.index, tvm.expr.Ramp)
     assert isinstance(stmt.body.value, tvm.expr.Broadcast)
 
+def test_vectorize_vector():
+    dtype = 'int64'
+    n = tvm.var('n')
+    ib = tvm.ir_builder.create()
+    A = ib.pointer("float32x4", name="A")
+    with ib.for_range(0, n) as i:
+        with ib.for_range(0, 4, for_type="vectorize") as j:
+            A[j] = tvm.const(1, A.dtype)
+    stmt = ib.get()
+    assert isinstance(stmt.body, tvm.stmt.For)
+    stmt = tvm.ir_pass.VectorizeLoop(stmt)
+    assert isinstance(stmt, tvm.stmt.For)
+    assert not isinstance(stmt.body, tvm.stmt.For)
+    assert isinstance(stmt.body.index, tvm.expr.Ramp)
+    assert isinstance(stmt.body.value, tvm.expr.Broadcast)
+
+
 def test_vectorize_with_if():
     n = tvm.var('n')
     x = tvm.var('x')
@@ -36,5 +54,6 @@ def test_vectorize_with_if():
     assert isinstance(stmt.else_case, tvm.stmt.For)
 
 if __name__ == "__main__":
+    test_vectorize_vector()
     test_vectorize_with_if()
     test_vectorize_loop()