From 99a3b66110e7e87de5cbbf226be0070bc498edca Mon Sep 17 00:00:00 2001
From: mhbliao <47895780+mhbliao@users.noreply.github.com>
Date: Thu, 19 Dec 2019 13:08:37 -0500
Subject: [PATCH] [hip] Add macro guarding the enum conversion for scalar
 accessor. (#1748)

- That's a high overhead part, which needs enabling ONLY if necessary.
---
 include/hip/hcc_detail/hip_vector_types.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/include/hip/hcc_detail/hip_vector_types.h b/include/hip/hcc_detail/hip_vector_types.h
index 0e8dad595a..1d6d43d957 100644
--- a/include/hip/hcc_detail/hip_vector_types.h
+++ b/include/hip/hcc_detail/hip_vector_types.h
@@ -109,7 +109,8 @@ THE SOFTWARE.
             operator T() const noexcept { return data[idx]; }
             __host__ __device__
             operator T() const volatile noexcept { return data[idx]; }
-            
+
+#ifdef __HIP_ENABLE_VECTOR_SCALAR_ACCESSORY_ENUM_CONVERSION__
             // The conversions to enum are fairly ghastly, but unfortunately used in
             // some pre-existing, difficult to modify, code.
             template<
@@ -130,6 +131,7 @@ THE SOFTWARE.
                         T, typename std::enable_if<std::is_enum<U>::value, std::underlying_type<U>>::type::type>{}>::type* = nullptr>
             __host__ __device__
             operator U() const volatile noexcept { return static_cast<U>(data[idx]); }
+#endif
 
             __host__ __device__
             operator T&() noexcept {