[Openmp-commits] [PATCH] D106692: [Libomptarget] Add unroll flag to shared variables loop

[Joseph Huber via Phabricator via Openmp-commits]

jhuber6 created this revision.
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Unrolling this loop provides better performance in practice because it is
executed on the device and is likely to be very small.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D106692

Files:
  openmp/libomptarget/deviceRTLs/common/src/parallel.cu


Index: openmp/libomptarget/deviceRTLs/common/src/parallel.cu
===================================================================
--- openmp/libomptarget/deviceRTLs/common/src/parallel.cu
+++ openmp/libomptarget/deviceRTLs/common/src/parallel.cu
@@ -314,6 +314,7 @@
     void **GlobalArgs;
     __kmpc_begin_sharing_variables(&GlobalArgs, nargs);
     // TODO: faster memcpy?
+#pragma unroll
     for (int I = 0; I < nargs; I++)
       GlobalArgs[I] = args[I];
   }


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