Remove temporary variable for CudaDeviceSynchronize

pyccel/ast/cudaext.py

@@ -17,7 +17,7 @@
 
 from .datatypes      import (dtype_and_precision_registry as dtype_registry,
                              default_precision, datatype, NativeInteger,
-                             NativeFloat, NativeComplex, NativeBool, str_dtype,
+                             NativeFloat, NativeComplex, NativeBool, NativeVoid, str_dtype,
                              NativeNumeric)
 
 from .internals      import PyccelInternalFunction, Slice, max_precision, get_final_precision
@@ -147,8 +147,8 @@ def __init__(self):
         #...
         self._shape     = None
         self._rank      = 0
-        self._dtype     = NativeInteger()
-        self._precision = None
+        self._dtype     = NativeVoid()
+        self._precision = 0
         self._order     = None
         super().__init__()
 

pyccel/codegen/printing/ccode.py

@@ -210,7 +210,8 @@
                   ('int',8)     : 'int64_t',
                   ('int',2)     : 'int16_t',
                   ('int',1)     : 'int8_t',
-                  ('bool',4)    : 'bool'}
+                  ('bool',4)    : 'bool',
+                  ('void',0)    : 'void',}
 
 ndarray_type_registry = {
                   ('float',8)   : 'nd_double',

pyccel/codegen/printing/ccudacode.py

@@ -537,7 +537,7 @@ def copy_CudaArray_Data(self, expr):
             return  '%s%s\n' % (dummy_array, cpy_data)
 
     def _print_CudaSynchronize(self, expr):
-        return 'cudaDeviceSynchronize()'
+        return 'cudaDeviceSynchronize();\n'
 
     def _print_CudaInternalVar(self, expr):
         var_name = type(expr).__name__

pyccel/parser/semantic.py

@@ -2642,6 +2642,8 @@ def _visit_Assign(self, expr, **settings):
                         bounding_box=(self._current_fst_node.lineno, self._current_fst_node.col_offset),
                         severity='error')
                     return None
+            if lhs is PyccelSymbol and lhs.is_temp and rhs.dtype is NativeVoid():
+                return rhs
             lhs = self._assign_lhs_variable(lhs, d_var, rhs, new_expressions, isinstance(expr, AugAssign), **settings)
         elif isinstance(lhs, PythonTuple):
             n = len(lhs)

tests/internal/scripts/ccuda/cuda_synchronize.py

@@ -0,0 +1,4 @@
+from pyccel import cuda
+
+if __name__ == '__main__':
+    cuda.synchronize()