fixed issues with memset and fill operations

Author: dyniols

sycl/test-e2e/VirtualMem/virtual_mem_usm_compatibility.cpp

@@ -19,7 +19,7 @@ int main() {
   int Failed = 0;
   constexpr int ValueSetInKernelForCopyToUSM = 111;
   constexpr int ValueSetForCopyToVirtualMem = 222;
-  constexpr int ValueSetInMemSetOperation = 333;
+  constexpr int ValueSetInMemSetOperationPerByte = 1;
   constexpr int ValueSetInFillOperation = 444;
   constexpr size_t NumberOfElements = 1000;
   size_t BytesRequired = NumberOfElements * sizeof(int);
@@ -86,28 +86,28 @@ int main() {
     }
   }
 
-  // Check that can use memset on virtual memory
-  Queue.memset(DataPtr, ValueSetInMemSetOperation, AlignedByteSize)
-      .wait_and_throw();
-
-  Queue
-      .parallel_for(NumberOfElements,
-                    [=](sycl::id<1> Idx) { CopyBack[Idx] = DataPtr[Idx]; })
-      .wait_and_throw();
+  //Check that can use memset on virtual memorys
+  int ExpectedResultAfterMemSetOperation{0};
+  std::memset(&ExpectedResultAfterMemSetOperation, ValueSetInMemSetOperationPerByte, sizeof(int));
+  Queue.memset(MappedPtr,ValueSetInMemSetOperationPerByte, AlignedByteSize).wait_and_throw();
+  
+  Queue.parallel_for(NumberOfElements, [=](sycl::id<1> Idx) {
+         CopyBack[Idx] = DataPtr[Idx];
+  }).wait_and_throw();
 
   for (size_t i = 0; i < NumberOfElements; i++) {
-    if (CopyBack[i] != ValueSetInMemSetOperation) {
+    if (CopyBack[i] != ExpectedResultAfterMemSetOperation) {
       std::cout << "Comparison failed after memset operation on virtual memory "
                    "at index "
-                << i << ": " << CopyBack[i]
-                << " != " << ValueSetInMemSetOperation << std::endl;
+                << i << ": " << CopyBack[i] << " != " << ExpectedResultAfterMemSetOperation
+                << std::endl;
       ++Failed;
     }
   }
 
   // Check that can use fill on virtual memory
 
-  Queue.fill(DataPtr, ValueSetInFillOperation, AlignedByteSize)
+  Queue.fill(DataPtr, ValueSetInFillOperation, NumberOfElements)
       .wait_and_throw();
 
   Queue