Consolidation with CDI-PIO (develop)

Generally, this is !11 (merged) rebased onto the develop branch.

This is the first develop-based version accepted by the Buildbot of ICON: https://buildbot.dkrz.de/grid?branch=m300488/cdi-pio-2-integration

src/pio_server.c

@@ -1274,12 +1274,22 @@ planPasses(const struct streamMapping *mapping, const struct cdiPioConf *conf, s
        * recordAggLim data bytes, but use at least one, unless none
        * remain */
       size_t firstRecordOfPass = 0, curRecord;
+#if defined(__PGI) && __PGIC__ == 20
+      /* we need the following workaround because pggpp2 fails to produce
+       * LLVM IR assembly file with -O2 optimization level */
+      struct passPlan *passes = NULL;
+#else
       struct passPlan(*passes)[collSize] = NULL;
+#endif
       do
         {
           size_t taskBegin = firstRecordOfPass;
           curRecord = firstRecordOfPass - 1;
+#if defined(__PGI) && __PGIC__ == 20
+          passes = Realloc(passes, sizeof(*passes) * collSize * (numPasses + 1));
+#else
           passes = Realloc(passes, sizeof(*passes) * (numPasses + 1));
+#endif
           for (size_t rank = 0; rank < collSize; ++rank)
             {
               size_t recordAggBufSize = 0;
@@ -1287,18 +1297,25 @@ planPasses(const struct streamMapping *mapping, const struct cdiPioConf *conf, s
                      && ((recordAggBufSize + writtenRecords[curRecord + 1].dataSize) < recordAggBufLim))
                 recordAggBufSize += writtenRecords[++curRecord].dataSize;
               if (curRecord == taskBegin - 1 && curRecord + 1 < numWrittenRecords) ++curRecord;
+#if defined(__PGI) && __PGIC__ == 20
+              passes[collSize * numPasses + rank] = (struct passPlan)
+              {
+#else
               passes[numPasses][rank] = (struct passPlan){
-                .recordAggStart = (unsigned) taskBegin,
-                .recordAggEnd = (unsigned) curRecord,
-                .varStart = writtenRecords[taskBegin].varID,
-                .varEnd = writtenRecords[curRecord].varID,
+#endif
+                .recordAggStart = (unsigned) taskBegin, .recordAggEnd = (unsigned) curRecord,
+                .varStart = writtenRecords[taskBegin].varID, .varEnd = writtenRecords[curRecord].varID,
               };
               taskBegin = curRecord + 1;
             }
           ++numPasses, firstRecordOfPass = curRecord + 1;
         }
       while (curRecord + 1 < numWrittenRecords);
+#if defined(__PGI) && __PGIC__ == 20
+      *passes_ = (struct passPlan(*)[]) passes;
+#else
       *passes_ = passes;
+#endif
     }
   Free(recordDataSizePfxSums);
   return numPasses;