Don't check for nullptr

If new fails then std::bad_alloc will be thrown. Also add the same
checking for urMemBufferCreate.

Author: Hugh Delaney

source/adapters/cuda/memory.cpp

@@ -56,9 +56,6 @@ UR_APIEXPORT ur_result_t UR_APICALL urMemBufferCreate(
 
     auto URMemObj = std::unique_ptr<ur_mem_handle_t_>(
         new ur_mem_handle_t_{hContext, flags, AllocMode, HostPtr, size});
-    if (URMemObj == nullptr) {
-      return UR_RESULT_ERROR_OUT_OF_HOST_MEMORY;
-    }
 
     // First allocation will be made at urMemBufferCreate if context only
     // has one device
@@ -74,6 +71,8 @@ UR_APIEXPORT ur_result_t UR_APICALL urMemBufferCreate(
     MemObj = URMemObj.release();
   } catch (ur_result_t Err) {
     return Err;
+  } catch (std::bad_alloc &Err) {
+    return UR_RESULT_ERROR_OUT_OF_HOST_MEMORY;
   } catch (...) {
     return UR_RESULT_ERROR_OUT_OF_RESOURCES;
   }
@@ -245,10 +244,6 @@ UR_APIEXPORT ur_result_t UR_APICALL urMemImageCreate(
       }
     }
 
-    if (URMemObj == nullptr) {
-      return UR_RESULT_ERROR_OUT_OF_HOST_MEMORY;
-    }
-
     *phMem = URMemObj.release();
   } catch (ur_result_t Err) {
     return Err;

source/adapters/hip/memory.cpp

@@ -133,9 +133,6 @@ UR_APIEXPORT ur_result_t UR_APICALL urMemBufferCreate(
 
     auto URMemObj = std::unique_ptr<ur_mem_handle_t_>(
         new ur_mem_handle_t_{hContext, flags, AllocMode, HostPtr, size});
-    if (URMemObj == nullptr) {
-      throw UR_RESULT_ERROR_OUT_OF_HOST_MEMORY;
-    }
 
     // First allocation will be made at urMemBufferCreate if context only
     // has one device
@@ -157,6 +154,8 @@ UR_APIEXPORT ur_result_t UR_APICALL urMemBufferCreate(
     RetMemObj = URMemObj.release();
   } catch (ur_result_t Err) {
     Result = Err;
+  } catch (std::bad_alloc &Err) {
+    return UR_RESULT_ERROR_OUT_OF_HOST_MEMORY;
   } catch (...) {
     Result = UR_RESULT_ERROR_OUT_OF_RESOURCES;
   }
@@ -384,10 +383,6 @@ UR_APIEXPORT ur_result_t UR_APICALL urMemImageCreate(
     auto URMemObj = std::unique_ptr<ur_mem_handle_t_>(new ur_mem_handle_t_{
         hContext, flags, *pImageFormat, *pImageDesc, pHost});
 
-    if (URMemObj == nullptr) {
-      return UR_RESULT_ERROR_OUT_OF_HOST_MEMORY;
-    }
-
     if (PerformInitialCopy) {
       for (const auto &Dev : hContext->getDevices()) {
         ScopedContext Active(Dev);