Use std::ignore.

Signed-off-by: JackAKirk <jack.kirk@codeplay.com>

Author: JackAKirk

sycl/include/sycl/ext/oneapi/experimental/builtins.hpp

@@ -120,7 +120,7 @@ std::enable_if_t<std::is_same<T, bfloat16>::value, T> fabs(T x) {
 #if defined(__SYCL_DEVICE_ONLY__) && defined(__NVPTX__)
   return bfloat16::from_bits(__clc_fabs(x.raw()));
 #else
-  (void)x;
+  std::ignore = x;
   throw runtime_error("bfloat16 is not currently supported on the host device.",
                       PI_INVALID_DEVICE);
 #endif // defined(__SYCL_DEVICE_ONLY__) && defined(__NVPTX__)
@@ -141,7 +141,7 @@ sycl::marray<bfloat16, N> fabs(sycl::marray<bfloat16, N> x) {
   }
   return res;
 #else
-  (void)x;
+  std::ignore = x;
   throw runtime_error("bfloat16 is not currently supported on the host device.",
                       PI_INVALID_DEVICE);
 #endif // defined(__SYCL_DEVICE_ONLY__) && defined(__NVPTX__)
@@ -152,7 +152,7 @@ std::enable_if_t<std::is_same<T, bfloat16>::value, T> fmin(T x, T y) {
 #if defined(__SYCL_DEVICE_ONLY__) && defined(__NVPTX__)
   return bfloat16::from_bits(__clc_fmin(x.raw(), y.raw()));
 #else
-  (void)x;
+  std::ignore = x;
   (void)y;
   throw runtime_error("bfloat16 is not currently supported on the host device.",
                       PI_INVALID_DEVICE);
@@ -178,7 +178,7 @@ sycl::marray<bfloat16, N> fmin(sycl::marray<bfloat16, N> x,
 
   return res;
 #else
-  (void)x;
+  std::ignore = x;
   (void)y;
   throw runtime_error("bfloat16 is not currently supported on the host device.",
                       PI_INVALID_DEVICE);
@@ -190,7 +190,7 @@ std::enable_if_t<std::is_same<T, bfloat16>::value, T> fmax(T x, T y) {
 #if defined(__SYCL_DEVICE_ONLY__) && defined(__NVPTX__)
   return bfloat16::from_bits(__clc_fmax(x.raw(), y.raw()));
 #else
-  (void)x;
+  std::ignore = x;
   (void)y;
   throw runtime_error("bfloat16 is not currently supported on the host device.",
                       PI_INVALID_DEVICE);
@@ -215,7 +215,7 @@ sycl::marray<bfloat16, N> fmax(sycl::marray<bfloat16, N> x,
   }
   return res;
 #else
-  (void)x;
+  std::ignore = x;
   (void)y;
   throw runtime_error("bfloat16 is not currently supported on the host device.",
                       PI_INVALID_DEVICE);
@@ -227,7 +227,7 @@ std::enable_if_t<std::is_same<T, bfloat16>::value, T> fma(T x, T y, T z) {
 #if defined(__SYCL_DEVICE_ONLY__) && defined(__NVPTX__)
   return bfloat16::from_bits(__clc_fma(x.raw(), y.raw(), z.raw()));
 #else
-  (void)x;
+  std::ignore = x;
   (void)y;
   (void)z;
   throw runtime_error("bfloat16 is not currently supported on the host device.",
@@ -255,7 +255,7 @@ sycl::marray<bfloat16, N> fma(sycl::marray<bfloat16, N> x,
   }
   return res;
 #else
-  (void)x;
+  std::ignore = x;
   (void)y;
   throw runtime_error("bfloat16 is not currently supported on the host device.",
                       PI_INVALID_DEVICE);

sycl/include/sycl/ext/oneapi/matrix/matrix-tensorcore.hpp

@@ -138,12 +138,12 @@ joint_matrix_fill(Group sg,
                   const T2 v) {
   // We kept the unused "sg" in joint_matrix_fill to match the other DPC++
   // functions
-  (void)sg;
+  std::ignore = sg;
 #if defined(__SYCL_DEVICE_ONLY__) && defined(__NVPTX__)
   res.wi_marray = v;
 #else
-  (void)res;
-  (void)v;
+  std::ignore = res;
+  std::ignore = v;
 #endif // defined(__SYCL_DEVICE_ONLY__) && defined(__NVPTX__)
 }
 
@@ -652,10 +652,10 @@ void joint_matrix_load(
                                                     Layout, Space>{}
       .load(res, src, stride);
 #else
-  (void)sg;
-  (void)res;
-  (void)src;
-  (void)stride;
+  std::ignore = sg;
+  std::ignore = res;
+  std::ignore = src;
+  std::ignore = stride;
   throw runtime_error(
       "When using SYCL_EXT_ONEAPI_MATRIX=3 joint_matrix_load is "
       "only supported by CUDA devices",
@@ -674,10 +674,10 @@ void joint_matrix_store(Group sg,
                                                      Layout, Space>{}
       .store(src, dst, stride);
 #else
-  (void)sg;
-  (void)src;
-  (void)dst;
-  (void)stride;
+  std::ignore = sg;
+  std::ignore = src;
+  std::ignore = dst;
+  std::ignore = stride;
   throw runtime_error(
       "When using SYCL_EXT_ONEAPI_MATRIX=3 joint_matrix_store is "
       "only supported by CUDA devices",
@@ -698,10 +698,10 @@ joint_matrix_mad(
              T1, T2, M, K, N, LayoutA, LayoutB, LayoutC>{}
       .mad(A, B, C);
 #else
-  (void)sg;
-  (void)A;
-  (void)B;
-  (void)C;
+  std::ignore = sg;
+  std::ignore = A;
+  std::ignore = B;
+  std::ignore = C;
   throw runtime_error("When using SYCL_EXT_ONEAPI_MATRIX=3 joint_matrix_mad is "
                       "only supported by CUDA devices",
                       PI_INVALID_DEVICE);