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io/romio314: mark datatypes of size 0 as contiguous #4895

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Mar 13, 2018
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io/romio314: mark datatypes of size 0 as contiguous #4895

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8 changes: 8 additions & 0 deletions ompi/mca/io/romio314/src/io_romio314_module.c
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Original file line number Diff line number Diff line change
Expand Up @@ -139,6 +139,14 @@ void ADIOI_Datatype_iscontig(MPI_Datatype datatype, int *flag)
* In addition, if the data is contiguous but true_lb differes
* from zero, ROMIO will ignore the displacement. Thus, lie!
*/

size_t size;
opal_datatype_type_size (&datatype->super, &size);
if ( 0 == size ) {
*flag = 1;
return;
}

*flag = ompi_datatype_is_contiguous_memory_layout(datatype, 2);
if (*flag) {
MPI_Aint true_extent, true_lb;
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