tree 07d5777ed369182b80e27d292f871c2b0e9e44a7
parent e0fd650d00a4dfd8864834cefb77a9b4b238cfd9
author Cathal Corbett <cathal.corbett@arm.com> 1662035699 +0100
committer Cathal Corbett <cathal.corbett@arm.com> 1670941871 +0000

Optimize the calling of IsLayerSupported().

!armnn:8742

  * Done as part of 22.11/23.02 innovation days.
  * IsLayerSupported() is called in model prepare (delegate, android-nn-driver and shim/support_library)
    and again in ArmNN once model optimization is performed.
  * From calling IsLayerSupported() the first time, we should know that the layers are supported
    and what backend they are supported on.
  * Solution is to set the BackendId of the IConnectableLayer when IsLayerSupported() is called the first time,
  * In the Optimize() function we then check if the backend is set. If so, we do not call IsLayerSupported() again.
  * In the case a layer that is supported gets optimized, then the BackendId of that layer get set to "Unknown"
    for the new optimized layer and IsLayerSupported() will get called on the newly optimized layer.

Signed-off-by: Cathal Corbett <cathal.corbett@arm.com>
Change-Id: Ie5c6c9cd10d81f90b1ee78dd6e3442f353b6c109