[llvm] [libsycl] Implement memcpy API (PR #205369)

[Kseniya Tikhomirova via llvm-commits]

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@@ -276,7 +286,17 @@ void mock::MockLiboffload::initDefault() {
         }
         return OL_SUCCESS;
       });
-
+  ON_CALL(*this, olMemcpy)
+      .WillByDefault([this](ol_queue_handle_t Queue, void *DstPtr,
+                            ol_device_handle_t DstDevice, const void *SrcPtr,
+                            ol_device_handle_t SrcDevice,
+                            size_t Size) -> ol_result_t {
+        if (!Queue || !DstDevice || !DstDevice)
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KseniyaTikhomirova wrote:

real offload api don't return error for !Queue, do you change it here intentionally?

https://github.com/llvm/llvm-project/pull/205369