tree a4585778e3aad6996012be7b8a16c7a0019b250c
parent 741f72bde7704e49c096dd90effdff4ab099d2d9
author David Gross <dgross@google.com> 1460144141 -0700
committer David Gross <dgross@google.com> 1460572476 -0700

If a general reduction kernel lacks a combiner function, synthesize one.

The CPU reference driver can only go multithreaded for a reduction kernel
if that kernel has a combiner function.

Bug: 27299475

Change-Id: If7f3a9ba8ec5e15ed5f3ef96968d28d650b01c20