From c66a6449c266404e8326a6d8f1b69d7dbe9666ce Mon Sep 17 00:00:00 2001
From: Steffen Larsen <steffen.larsen@codeplay.com>
Date: Mon, 2 Mar 2020 15:34:56 +0000
Subject: [PATCH] [SYCL] Reverse max work-group size order

Due to the user defined work-group size being flipped before launching
kernels, the reported max work-group size for a device must be reversed
correspondingly.

Signed-off-by: Steffen Larsen <steffen.larsen@codeplay.com>
---
 sycl/source/detail/device_info.hpp | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/sycl/source/detail/device_info.hpp b/sycl/source/detail/device_info.hpp
index b6b4405ed40f0..322201fe242a8 100644
--- a/sycl/source/detail/device_info.hpp
+++ b/sycl/source/detail/device_info.hpp
@@ -332,6 +332,19 @@ struct get_device_info<bool, info::device::kernel_kernel_pipe_support> {
   }
 };
 
+// Specialization for max_work_item_sizes.
+// Due to the flipping of work group dimensions before kernel launch, the max
+// sizes should also be reversed.
+template <> struct get_device_info<id<3>, info::device::max_work_item_sizes> {
+  static id<3> get(RT::PiDevice dev, const plugin &Plugin) {
+    size_t result[3];
+    Plugin.call<PiApiKind::piDeviceGetInfo>(
+        dev, pi::cast<RT::PiDeviceInfo>(info::device::max_work_item_sizes),
+        sizeof(result), &result, nullptr);
+    return id<3>(result[2], result[1], result[0]);
+  }
+};
+
 // SYCL host device information
 
 // Default template is disabled, all possible instantiations are