From 5a35a8e82cd976858e67e3735de08b1bbfc7550e Mon Sep 17 00:00:00 2001
From: Gilles Gouaillardet <gilles@rist.or.jp>
Date: Mon, 15 May 2017 11:43:48 +0900
Subject: [PATCH] opal/datatype: do not compute ptypes for OPAL predefined
 datatypes

Fixes open-mpi/ompi#3522

Signed-off-by: Gilles Gouaillardet <gilles@rist.or.jp>
---
 opal/datatype/opal_convertor.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/opal/datatype/opal_convertor.c b/opal/datatype/opal_convertor.c
index 3ceab70a8a..18cbaf9c97 100644
--- a/opal/datatype/opal_convertor.c
+++ b/opal/datatype/opal_convertor.c
@@ -451,6 +451,10 @@ opal_datatype_compute_remote_size( const opal_datatype_t* pData,
     uint32_t typeMask = pData->bdt_used;
     size_t length = 0;
 
+    if (opal_datatype_is_predefined(pData)) {
+        return sizes[pData->desc.desc->elem.common.type];
+    }
+
     if( OPAL_UNLIKELY(NULL == pData->ptypes) ) {
         /* Allocate and fill the array of types used in the datatype description */
         opal_datatype_compute_ptypes( (opal_datatype_t*)pData );