All convertors with a zero length are considered as contiguous.

This commit was SVN r19913.

ompi/datatype/convertor.c

@@ -46,6 +46,7 @@ static void ompi_convertor_construct( ompi_convertor_t* convertor )
     convertor->stack_size     = DT_STATIC_STACK_SIZE;
     convertor->partial_length = 0;
     convertor->remoteArch     = ompi_mpi_local_arch;
+    convertor->flags          = DT_FLAG_NO_GAPS | CONVERTOR_COMPLETED;
 }
 
 static void ompi_convertor_destruct( ompi_convertor_t* convertor )
@@ -464,7 +465,7 @@ int32_t ompi_convertor_set_position_nocheck( ompi_convertor_t* convertor,
          * will not do anything.                                        \
          */                                                             \
         if( OPAL_UNLIKELY((0 == count) || (0 == datatype->size)) ) {    \
-            convertor->flags |= CONVERTOR_COMPLETED;                    \
+            convertor->flags |= DT_FLAG_NO_GAPS | CONVERTOR_COMPLETED;  \
             convertor->local_size = convertor->remote_size = 0;         \
             return OMPI_SUCCESS;                                        \
         }                                                               \

ompi/datatype/convertor.h

@@ -154,6 +154,7 @@ static inline int ompi_convertor_cleanup( ompi_convertor_t* convertor )
     }
     convertor->pDesc     = NULL;
     convertor->stack_pos = 0;
+    convertor->flags     = DT_FLAG_NO_GAPS | CONVERTOR_COMPLETED;
     return OMPI_SUCCESS;
 }
 
@@ -224,7 +225,7 @@ ompi_convertor_copy_and_prepare_for_send( const ompi_convertor_t* pSrcConv,
                                           ompi_convertor_t* convertor )
 {
     convertor->remoteArch = pSrcConv->remoteArch;
-    convertor->flags      = (pSrcConv->flags | flags);
+    convertor->flags      = pSrcConv->flags | flags;
     convertor->master     = pSrcConv->master;
 
     return ompi_convertor_prepare_for_send( convertor, datatype, count, pUserBuf );