[llvm] [Offload] Skip event tests on AMDGPU (PR #148632)

[Kenneth Benzie via llvm-commits]

https://github.com/kbenzie created https://github.com/llvm/llvm-project/pull/148632

Add `OffloadDeviceTest::getPlatformBackend()` and use it to skip event tests which currently fail on AMDGPU due to:

```
OL_ERRC_UNIMPLEMENTED: synchronize event not implemented
```


>From 6243f965404662c400495729f7dad0e93c83959d Mon Sep 17 00:00:00 2001
From: "Kenneth Benzie (Benie)" <k.benzie83 at gmail.com>
Date: Mon, 14 Jul 2025 14:30:33 +0100
Subject: [PATCH] [Offload] Skip event tests on AMDGPU

Add `OffloadDeviceTest::getPlatformBackend()` and use it to skip event
tests which currently fail on AMDGPU due to:

```
OL_ERRC_UNIMPLEMENTED: synchronize event not implemented
```
---
 .../unittests/OffloadAPI/common/Fixtures.hpp   | 18 +++++++++++++++++-
 .../unittests/OffloadAPI/event/olWaitEvent.cpp | 12 +++++++++++-
 2 files changed, 28 insertions(+), 2 deletions(-)

diff --git a/offload/unittests/OffloadAPI/common/Fixtures.hpp b/offload/unittests/OffloadAPI/common/Fixtures.hpp
index 16ff3c4fe60a7..2bba4ea11cb11 100644
--- a/offload/unittests/OffloadAPI/common/Fixtures.hpp
+++ b/offload/unittests/OffloadAPI/common/Fixtures.hpp
@@ -73,6 +73,20 @@ struct OffloadDeviceTest
       GTEST_SKIP() << "No available devices.";
   }
 
+  ol_platform_backend_t getPlatformBackend() const {
+    ol_platform_handle_t Platform = nullptr;
+    if (olGetDeviceInfo(Device, OL_DEVICE_INFO_PLATFORM,
+                        sizeof(ol_platform_handle_t), &Platform)) {
+      return OL_PLATFORM_BACKEND_UNKNOWN;
+    }
+    ol_platform_backend_t Backend;
+    if (olGetPlatformInfo(Platform, OL_PLATFORM_INFO_BACKEND,
+                          sizeof(ol_platform_backend_t), &Backend)) {
+      return OL_PLATFORM_BACKEND_UNKNOWN;
+    }
+    return Backend;
+  }
+
   ol_device_handle_t Device = nullptr;
 };
 
@@ -159,7 +173,9 @@ struct OffloadQueueTest : OffloadDeviceTest {
 struct OffloadEventTest : OffloadQueueTest {
   void SetUp() override {
     RETURN_ON_FATAL_FAILURE(OffloadQueueTest::SetUp());
-
+    if (getPlatformBackend() == OL_PLATFORM_BACKEND_AMDGPU) {
+      GTEST_SKIP() << "synchronize event not implemented";
+    }
     // Get an event from a memcpy. We can still use it in olGetEventInfo etc
     // after it has been waited on.
     void *Alloc;
diff --git a/offload/unittests/OffloadAPI/event/olWaitEvent.cpp b/offload/unittests/OffloadAPI/event/olWaitEvent.cpp
index f80dabb4fc93f..33ad397774bd3 100644
--- a/offload/unittests/OffloadAPI/event/olWaitEvent.cpp
+++ b/offload/unittests/OffloadAPI/event/olWaitEvent.cpp
@@ -10,10 +10,20 @@
 #include <OffloadAPI.h>
 #include <gtest/gtest.h>
 
-using olWaitEventTest = OffloadQueueTest;
+struct olWaitEventTest : OffloadQueueTest {
+  void SetUp() override {
+    RETURN_ON_FATAL_FAILURE(OffloadQueueTest::SetUp());
+    if (getPlatformBackend() == OL_PLATFORM_BACKEND_AMDGPU) {
+      GTEST_SKIP() << "synchronize event not implemented";
+    }
+  }
+};
 OFFLOAD_TESTS_INSTANTIATE_DEVICE_FIXTURE(olWaitEventTest);
 
 TEST_P(olWaitEventTest, Success) {
+  if (getPlatformBackend() == OL_PLATFORM_BACKEND_AMDGPU) {
+    GTEST_SKIP() << "synchronize event not implemented";
+  }
   uint32_t Src = 42;
   void *DstPtr;