[llvm] [OFFLOAD] Add plugin with support for Intel oneAPI Level Zero (PR #158900)

[Alexey Sachkov via llvm-commits]

================
@@ -0,0 +1,193 @@
+//===--- Level Zero Target RTL Implementation -----------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// Code for tracing L0
+//
+//===----------------------------------------------------------------------===//
+// clang-format off
+#pragma once
+
+#include "Shared/Debug.h"
+#include "omptarget.h"
+#include <string>
+#include <level_zero/ze_api.h>
+
+#define STR(x) #x
+#define TO_STRING(x) STR(x)
+
+#define DPCALL(...)                                                            \
+  do {                                                                         \
+    if (getDebugLevel() > 1)                                                   \
+      DP(__VA_ARGS__);                                                         \
+  } while (0)
+
+#define FATAL_ERROR(Msg)                                                       \
+  do {                                                                         \
+    fprintf(stderr, "%s --> ", DEBUG_PREFIX);                                  \
+    fprintf(stderr, "Error: %s failed (%s) -- exiting...\n", __func__, Msg);   \
+    exit(EXIT_FAILURE);                                                        \
+  } while (0)
+
+#define WARNING(...)                                                           \
+  do {                                                                         \
+    fprintf(stderr, "%s --> ", DEBUG_PREFIX);                                  \
+    fprintf(stderr, "Warning: " __VA_ARGS__);                                  \
+  } while (0)
----------------
AlexeySachkov wrote:

```suggestion
  DP("Warning: ", __VA_ARGS__)
```

https://github.com/llvm/llvm-project/pull/158900