[WIP] Use new shape definition

include/mxnet/c_api.h

@@ -763,8 +763,8 @@ MXNET_DLL int MXNDArrayReshape64(NDArrayHandle handle,
  * \return 0 when success, -1 when failure happens
  */
 MXNET_DLL int MXNDArrayGetShape(NDArrayHandle handle,
-                                mx_uint *out_dim,
-                                const mx_uint **out_pdata);
+                                int *out_dim,
+                                const int **out_pdata);
 /*!
  * \brief get the content of the data in NDArray
  * \param handle the handle to the ndarray
@@ -1481,16 +1481,16 @@ MXNET_DLL int MXSymbolInferShape(SymbolHandle sym,
                                  mx_uint num_args,
                                  const char** keys,
                                  const mx_uint *arg_ind_ptr,
-                                 const mx_uint *arg_shape_data,
+                                 const int *arg_shape_data,
                                  mx_uint *in_shape_size,
-                                 const mx_uint **in_shape_ndim,
-                                 const mx_uint ***in_shape_data,
+                                 const int **in_shape_ndim,
+                                 const int ***in_shape_data,
                                  mx_uint *out_shape_size,
-                                 const mx_uint **out_shape_ndim,
-                                 const mx_uint ***out_shape_data,
+                                 const int **out_shape_ndim,
+                                 const int ***out_shape_data,
                                  mx_uint *aux_shape_size,
-                                 const mx_uint **aux_shape_ndim,
-                                 const mx_uint ***aux_shape_data,
+                                 const int **aux_shape_ndim,
+                                 const int ***aux_shape_data,
                                  int *complete);
 /*!
  * \brief partially infer shape of unknown input shapes given the known one.
@@ -1520,16 +1520,16 @@ MXNET_DLL int MXSymbolInferShapePartial(SymbolHandle sym,
                                         mx_uint num_args,
                                         const char** keys,
                                         const mx_uint *arg_ind_ptr,
-                                        const mx_uint *arg_shape_data,
+                                        const int *arg_shape_data,
                                         mx_uint *in_shape_size,
-                                        const mx_uint **in_shape_ndim,
-                                        const mx_uint ***in_shape_data,
+                                        const int **in_shape_ndim,
+                                        const int ***in_shape_data,
                                         mx_uint *out_shape_size,
-                                        const mx_uint **out_shape_ndim,
-                                        const mx_uint ***out_shape_data,
+                                        const int **out_shape_ndim,
+                                        const int ***out_shape_data,
                                         mx_uint *aux_shape_size,
-                                        const mx_uint **aux_shape_ndim,
-                                        const mx_uint ***aux_shape_data,
+                                        const int **aux_shape_ndim,
+                                        const int ***aux_shape_data,
                                         int *complete);
 
 /*!
@@ -1808,7 +1808,7 @@ MXNET_DLL int MXExecutorSimpleBind(SymbolHandle symbol_handle,
                                    const char** provided_grad_req_types,
                                    const mx_uint num_provided_arg_shapes,
                                    const char** provided_arg_shape_names,
-                                   const mx_uint* provided_arg_shape_data,
+                                   const int* provided_arg_shape_data,
                                    const mx_uint* provided_arg_shape_idx,
                                    const mx_uint num_provided_arg_dtypes,
                                    const char** provided_arg_dtype_names,
@@ -1862,7 +1862,7 @@ MXNET_DLL int MXExecutorReshape(int partial_shaping,
                                 const int* map_dev_ids,
                                 const mx_uint num_provided_arg_shapes,
                                 const char** provided_arg_shape_names,
-                                const mx_uint* provided_arg_shape_data,
+                                const int* provided_arg_shape_data,
                                 const mx_uint* provided_arg_shape_idx,
                                 mx_uint* num_in_args,
                                 NDArrayHandle** in_args,
@@ -2538,8 +2538,8 @@ MXNET_DLL int MXNDArrayGetSharedMemHandle(NDArrayHandle handle, int* shared_pid,
  * \param dtype data type of NDArray
  * \param out constructed NDArray
  */
-MXNET_DLL int MXNDArrayCreateFromSharedMem(int shared_pid, int shared_id, const mx_uint *shape,
-                                           mx_uint ndim, int dtype, NDArrayHandle *out);
+MXNET_DLL int MXNDArrayCreateFromSharedMem(int shared_pid, int shared_id, const int *shape,
+                                           int ndim, int dtype, NDArrayHandle *out);
 
 
 #ifdef __cplusplus

include/mxnet/ndarray.h

@@ -859,12 +859,15 @@ class NDArray {
     Chunk(mxnet::TShape shape, Context ctx_, bool delay_alloc_, int dtype)
         : static_data(false), delay_alloc(true), ctx(ctx_),
           storage_ref_(Storage::_GetSharedRef()) {
-      auto size = shape.Size();
       storage_shape = shape;
+      if (shape_is_known(storage_shape)) {
+        shandle.size = shape.Size() * mshadow::mshadow_sizeof(dtype);
+      }
       var = Engine::Get()->NewVariable();
-      shandle.size = size * mshadow::mshadow_sizeof(dtype);
       shandle.ctx = ctx_;
-      if (!delay_alloc_) this->CheckAndAlloc();
+      if (!delay_alloc_) {
+        this->CheckAndAlloc();
+      }
     }
 
     Chunk(const TBlob &data, int dev_id)

include/mxnet/tuple.h

@@ -199,7 +199,7 @@ class Tuple {
    * \return the corresponding dimension size
    */
   inline ValueType& operator[](int i) {
-    CHECK(i >= 0 && i < ndim());
+    CHECK(i >= 0 && i < ndim()) << "index = " << i << " must be in range [0, " << ndim() << ")";
     return begin()[i];
   }
   /*!
@@ -208,7 +208,7 @@ class Tuple {
    * \return the corresponding dimension size
    */
   inline const ValueType& operator[](int i) const {
-    CHECK(i >= 0 && i < ndim());
+    CHECK(i >= 0 && i < ndim()) << "index = " << i << " must be in range [0, " << ndim() << ")";
     return begin()[i];
   }
   /*!
@@ -271,14 +271,16 @@ class Tuple {
       if (!isspace(ch)) {
         is.setstate(std::ios::failbit);
         return is;
+      }
     }
-    }
-    // Handle empty tuple
+    // Handle empty tuple. A tensor whose shape is an empty tuple
+    // represents a scalar with ndim = 0.
     while (isspace(is.peek())) {
       is.get();
     }
     if (is.peek() == ')' || is.peek() == ']') {
       is.get();
+      t.SetDim(0);
       return is;
     }
     // Handle non-empty tuple
@@ -352,7 +354,7 @@ class Tuple {
       delete [] data_heap_;
       data_heap_ = new ValueType[ndim];
       num_heap_allocated_ = ndim;
-    } else if (ndim == -1 && data_heap_ != nullptr) {
+    } else if (ndim <= 0 && data_heap_ != nullptr) {
       delete [] data_heap_;
       data_heap_ = nullptr;
       num_heap_allocated_ = 0;
@@ -381,14 +383,11 @@ class TShape : public Tuple<dim_t> {
     this->SetDim(-1);
   }
   /*!
-   * constructor to construct a shape with all 1.
-   * TODO(junwu): The value should default to -1. Need to keep 1 for now
-   * for backward compatibility. Change it to -1 in the future when we can
-   * break backward compatibility.
+   * constructor to construct a shape with all `value`.
    * \param ndim the number of dimension
    * \param value the dimension size for all dims
    */
-  inline TShape(int ndim, int value = 1) {  // NOLINT(*)
+  inline TShape(int ndim, int value = -1) {  // NOLINT(*)
     this->SetDim(ndim);
     if (ndim > 0) {
       std::fill_n(begin(), ndim, value);
@@ -458,7 +457,7 @@ class TShape : public Tuple<dim_t> {
     dim_t size = 1;
     const dim_t* start = begin(), *fin = end();
     for (const dim_t* it = start; it != fin; ++it) {
-      CHECK_GE(*it, 0) << "Shape dim size cannot be -1, which means unknown.";
+      CHECK_GE(*it, 0) << "Shape dim size cannot be a negative value " << *it;
       size *= *it;
     }
     return size;
@@ -473,7 +472,7 @@ class TShape : public Tuple<dim_t> {
     dim_t num = 1;
     const dim_t *d = this->data();
     for (int i = dimstart; i < dimend; ++i) {
-      CHECK_GE(d[i], 0) << "Shape dim size cannot be -1, which means unknown.";
+      CHECK_GE(d[i], 0) << "Shape dim size cannot be a negative value " << d[i];
       num *= d[i];
     }
     return num;
@@ -608,6 +607,16 @@ class TShape : public Tuple<dim_t> {
 #endif
 };
 
+/*! brief check if shape is known using the NumPy compatible definition.
+ * zero-dim and zero-size tensors are valid. -1 means unknown.*/
+inline bool shape_is_known(const TShape& x) {
+  if (x.ndim() == -1) return false;
+  for (int i = 0; i < x.ndim(); ++i) {
+    if (x[i] == -1) return false;
+  }
+  return true;
+}
+
 /*! \brief helper function to cast type of container elements */
 template<typename SrcIter, typename DstIter>
 inline DstIter ShapeTypeCast(const SrcIter begin,
@@ -623,7 +632,7 @@ inline DstIter ShapeTypeCast(const SrcIter begin,
 template<typename SrcIter>
 inline TShape ShapeTypeCast(const SrcIter begin, const SrcIter end) {
   size_t ndim = std::distance(begin, end);
-  TShape res(ndim);
+  TShape res(ndim, -1);
   ShapeTypeCast(begin, end, res.begin());
   return res;
 }
@@ -669,7 +678,7 @@ struct hash<mxnet::Tuple<T> > {
   size_t operator()(const mxnet::Tuple<T>& val) const {
     std::hash<uint32_t> hash_uint;
     size_t res = hash_uint(val.ndim());
-    for (uint32_t i = 0; i < val.ndim(); ++i) {
+    for (int i = 0; i < val.ndim(); ++i) {
       res = dmlc::HashCombine(res, val[i]);
     }
     return res;

python/mxnet/base.py

@@ -213,6 +213,7 @@ def _load_lib():
 _LIB = _load_lib()
 
 # type definitions
+mx_int = ctypes.c_int
 mx_uint = ctypes.c_uint
 mx_float = ctypes.c_float
 mx_float_p = ctypes.POINTER(mx_float)

python/mxnet/executor.py

@@ -25,7 +25,7 @@
 import copy
 import numpy as np
 from .base import _LIB
-from .base import mx_uint, NDArrayHandle, ExecutorHandle, py_str
+from .base import mx_uint, NDArrayHandle, ExecutorHandle, py_str, mx_int
 from .base import check_call, c_handle_array, c_array_buf, c_str_array
 from .ndarray import NDArray
 from .ndarray import _ndarray_cls
@@ -445,8 +445,8 @@ def reshape(self, partial_shaping=False, allow_up_sizing=False, **kwargs):
                                                       py_array('i', ctx_map_dev_ids)),
                                           mx_uint(len(provided_arg_shape_names)),
                                           c_str_array(provided_arg_shape_names),
-                                          c_array_buf(mx_uint,
-                                                      py_array('I', provided_arg_shape_data)),
+                                          c_array_buf(mx_int,
+                                                      py_array('i', provided_arg_shape_data)),
                                           c_array_buf(mx_uint,
                                                       py_array('I', provided_arg_shape_idx)),
                                           ctypes.byref(num_in_args),

python/mxnet/ndarray/ndarray.py

@@ -35,7 +35,7 @@
 import numpy as np
 from ..base import _LIB, numeric_types, integer_types
 from ..base import c_str, c_array, c_array_buf, c_handle_array, mx_real_t
-from ..base import mx_uint, NDArrayHandle, check_call, DLPackHandle
+from ..base import mx_uint, NDArrayHandle, check_call, DLPackHandle, mx_int
 from ..base import ctypes2buffer
 from ..context import Context, current_context
 from . import _internal
@@ -146,8 +146,8 @@ def _new_from_shared_mem(shared_pid, shared_id, shape, dtype):
     check_call(_LIB.MXNDArrayCreateFromSharedMem(
         ctypes.c_int(shared_pid),
         ctypes.c_int(shared_id),
-        c_array(mx_uint, shape),
-        mx_uint(len(shape)),
+        c_array(mx_int, shape),
+        mx_int(len(shape)),
         ctypes.c_int(int(_DTYPE_NP_TO_MX[np.dtype(dtype).type])),
         ctypes.byref(hdl)))
     return hdl
@@ -1848,8 +1848,8 @@ def shape(self):
         >>> y.shape
         (2L, 3L, 4L)
         """
-        ndim = mx_uint()
-        pdata = ctypes.POINTER(mx_uint)()
+        ndim = mx_int()
+        pdata = ctypes.POINTER(mx_int)()
         check_call(_LIB.MXNDArrayGetShape(
             self.handle, ctypes.byref(ndim), ctypes.byref(pdata)))
         return tuple(pdata[:ndim.value]) # pylint: disable=invalid-slice-index

python/mxnet/symbol/symbol.py

@@ -34,7 +34,7 @@
 
 from ..attribute import AttrScope
 from ..base import _LIB, numeric_types, c_array, c_array_buf, c_str, c_str_array, c_handle_array
-from ..base import mx_uint, py_str, string_types, integer_types
+from ..base import mx_uint, py_str, string_types, integer_types, mx_int
 from ..base import NDArrayHandle, ExecutorHandle, SymbolHandle
 from ..base import check_call, MXNetError, NotImplementedForSymbol
 from ..context import Context, current_context
@@ -1174,14 +1174,14 @@ def _infer_shape_impl(self, partial, *args, **kwargs):
                 indptr.append(len(sdata))
             keys = c_str_array(str_keys)
         arg_shape_size = mx_uint()
-        arg_shape_ndim = ctypes.POINTER(mx_uint)()
-        arg_shape_data = ctypes.POINTER(ctypes.POINTER(mx_uint))()
+        arg_shape_ndim = ctypes.POINTER(mx_int)()
+        arg_shape_data = ctypes.POINTER(ctypes.POINTER(mx_int))()
         out_shape_size = mx_uint()
-        out_shape_ndim = ctypes.POINTER(mx_uint)()
-        out_shape_data = ctypes.POINTER(ctypes.POINTER(mx_uint))()
+        out_shape_ndim = ctypes.POINTER(mx_int)()
+        out_shape_data = ctypes.POINTER(ctypes.POINTER(mx_int))()
         aux_shape_size = mx_uint()
-        aux_shape_ndim = ctypes.POINTER(mx_uint)()
-        aux_shape_data = ctypes.POINTER(ctypes.POINTER(mx_uint))()
+        aux_shape_ndim = ctypes.POINTER(mx_int)()
+        aux_shape_data = ctypes.POINTER(ctypes.POINTER(mx_int))()
         complete = ctypes.c_int()
         if partial:
             infer_func = _LIB.MXSymbolInferShapePartial
@@ -1192,7 +1192,7 @@ def _infer_shape_impl(self, partial, *args, **kwargs):
             mx_uint(len(indptr) - 1),
             keys,
             c_array_buf(mx_uint, array('I', indptr)),
-            c_array_buf(mx_uint, array('I', sdata)),
+            c_array_buf(mx_int, array('i', sdata)),
             ctypes.byref(arg_shape_size),
             ctypes.byref(arg_shape_ndim),
             ctypes.byref(arg_shape_data),
@@ -1576,10 +1576,10 @@ def simple_bind(self, ctx, grad_req='write', type_dict=None, stype_dict=None,
                                                  provided_grad_req_types,
                                                  mx_uint(len(provided_arg_shape_names)),
                                                  c_str_array(provided_arg_shape_names),
-                                                 c_array_buf(mx_uint,
+                                                 c_array_buf(mx_int,
                                                              array('I', provided_arg_shape_data)),
                                                  c_array_buf(mx_uint,
-                                                             array('I', provided_arg_shape_idx)),
+                                                             array('i', provided_arg_shape_idx)),
                                                  num_provided_arg_types,
                                                  provided_arg_type_names,
                                                  provided_arg_type_data,

src/c_api/c_api.cc

@@ -470,7 +470,7 @@ MXNET_DLL int MXNDArrayReshape64(NDArrayHandle handle,
   NDArray *ptr = new NDArray();
   API_BEGIN();
   NDArray *arr = static_cast<NDArray*>(handle);
-  nnvm::Tuple<dim_t> shape(dims, dims+ndim);
+  mxnet::Tuple<dim_t> shape(dims, dims+ndim);
   CHECK_GT(arr->shape().Size(), 0) << "Source ndarray's shape is undefined. Input shape: "
     << arr->shape();
   mxnet::TShape new_shape = mxnet::op::InferReshapeShape(shape, arr->shape(), reverse);
@@ -492,17 +492,18 @@ int MXNDArrayGetStorageType(NDArrayHandle handle,
 }
 
 int MXNDArrayGetShape(NDArrayHandle handle,
-                      mx_uint *out_dim,
-                      const mx_uint **out_pdata) {
+                      int *out_dim,
+                      const int **out_pdata) {
   MXAPIThreadLocalEntry *ret = MXAPIThreadLocalStore::Get();
   API_BEGIN();
   NDArray *arr = static_cast<NDArray*>(handle);
   if (!arr->is_none()) {
     const mxnet::TShape &s = arr->shape();
     *out_dim = s.ndim();
-    std::vector<uint32_t>& buffer = ret->arg_shape_buffer;
+    CHECK_GE(s.ndim(), 0);
+    std::vector<int>& buffer = ret->arg_shape_buffer;
     buffer.resize(s.ndim());
-    nnvm::ShapeTypeCast(s.begin(), s.end(), buffer.data());
+    mxnet::ShapeTypeCast(s.begin(), s.end(), buffer.data());
     *out_pdata = buffer.data();
   } else {
     *out_dim = 0;
@@ -1394,8 +1395,8 @@ int MXNDArrayGetSharedMemHandle(NDArrayHandle handle, int* shared_pid, int* shar
   API_END();
 }
 
-int MXNDArrayCreateFromSharedMem(int shared_pid, int shared_id, const mx_uint *shape,
-                                 mx_uint ndim, int dtype, NDArrayHandle *out) {
+int MXNDArrayCreateFromSharedMem(int shared_pid, int shared_id, const int *shape,
+                                 int ndim, int dtype, NDArrayHandle *out) {
   API_BEGIN();
   *out = new NDArray(shared_pid, shared_id, mxnet::TShape(shape, shape + ndim), dtype);
   API_END();