IVGCVSW-4077 Disable NEON memory import

* Temporarily handles cases in CalculateEdgeStrategy
  where dstFactory pointer is null when import is
  disabled.
* This patch is required for ensuring debug layer
  works correctly when executing a model on Neon.

Signed-off-by: James Conroy <james.conroy@arm.com>
Change-Id: I7304723246d362d6d9073c3d0b1224e194a8532c

3 files changed, 12 insertions, 6 deletions

diff --git a/src/armnn/Network.cpp b/src/armnn/Network.cpp
index f4bfc7a88e..b1cb5a871a 100644
--- a/src/armnn/Network.cpp
+++ b/src/armnn/Network.cpp
@@ -699,6 +699,12 @@ EdgeStrategy CalculateEdgeStrategy(BackendsMap& backends,
         for (auto&& pref : dstPrefs)
         {
             ITensorHandleFactory* dstFactory = registry.GetFactory(pref);
+
+            // Handles some cases where dstFactory is null when Neon memory import is disabled
+            if (!dstFactory) {
+                return EdgeStrategy::CopyToTarget;
+            }
+
             if ((dstFactory->GetImportFlags() & srcFactory->GetExportFlags()) != 0)
             {
                 return EdgeStrategy::ExportToTarget;
diff --git a/src/backends/neon/NeonTensorHandleFactory.cpp b/src/backends/neon/NeonTensorHandleFactory.cpp
index 80f46d2237..d5fef4ea95 100644
--- a/src/backends/neon/NeonTensorHandleFactory.cpp
+++ b/src/backends/neon/NeonTensorHandleFactory.cpp
@@ -104,7 +104,7 @@ MemorySourceFlags NeonTensorHandleFactory::GetExportFlags() const
 
 MemorySourceFlags NeonTensorHandleFactory::GetImportFlags() const
 {
-    return static_cast<MemorySourceFlags>(MemorySource::Malloc);
+    return 0;
 }
 
 } // namespace armnn
diff --git a/src/backends/neon/test/NeonEndToEndTests.cpp b/src/backends/neon/test/NeonEndToEndTests.cpp
index 5146a598c7..26c06758a4 100644
--- a/src/backends/neon/test/NeonEndToEndTests.cpp
+++ b/src/backends/neon/test/NeonEndToEndTests.cpp
@@ -366,27 +366,27 @@ BOOST_AUTO_TEST_CASE(NeonExportNonAlignedOutputPointerTest)
     ExportNonAlignedOutputPointerTest(defaultBackends);
 }
 
-BOOST_AUTO_TEST_CASE(NeonImportAlignedPointerTest)
+BOOST_AUTO_TEST_CASE(NeonImportAlignedPointerTest, * boost::unit_test::disabled())
 {
     ImportAlignedPointerTest(defaultBackends);
 }
 
-BOOST_AUTO_TEST_CASE(NeonImportOnlyWorkload)
+BOOST_AUTO_TEST_CASE(NeonImportOnlyWorkload, * boost::unit_test::disabled())
 {
     ImportOnlyWorkload(defaultBackends);
 }
 
-BOOST_AUTO_TEST_CASE(NeonExportOnlyWorkload)
+BOOST_AUTO_TEST_CASE(NeonExportOnlyWorkload, * boost::unit_test::disabled())
 {
     ExportOnlyWorkload(defaultBackends);
 }
 
-BOOST_AUTO_TEST_CASE(NeonImportAndExportWorkload)
+BOOST_AUTO_TEST_CASE(NeonImportAndExportWorkload, * boost::unit_test::disabled())
 {
     ImportAndExportWorkload(defaultBackends);
 }
 
-BOOST_AUTO_TEST_CASE(NeonExportOutputWithSeveralOutputSlotConnectionsTest)
+BOOST_AUTO_TEST_CASE(NeonExportOutputWithSeveralOutputSlotConnectionsTest, * boost::unit_test::disabled())
 {
     ExportOutputWithSeveralOutputSlotConnectionsTest(defaultBackends);
 }