From e1f06ecdf77daa7f2d3ebdeb9e520b51c0b6c931 Mon Sep 17 00:00:00 2001
From: Carl Pearson <cwpears@sandia.gov>
Date: Thu, 11 Aug 2022 15:51:30 -0600
Subject: [PATCH] c++17: add [[fallthrough]] attribute

---
 graph/impl/KokkosGraph_Distance2Color_impl.hpp     | 2 +-
 graph/src/KokkosGraph_Triangle.hpp                 | 5 +----
 perf_test/sparse/KokkosSparse_sptrsv.cpp           | 2 ++
 sparse/impl/KokkosSparse_spgemm_impl_memaccess.hpp | 2 +-
 4 files changed, 5 insertions(+), 6 deletions(-)

diff --git a/graph/impl/KokkosGraph_Distance2Color_impl.hpp b/graph/impl/KokkosGraph_Distance2Color_impl.hpp
index 2ab04667e0..58b6d79ebb 100644
--- a/graph/impl/KokkosGraph_Distance2Color_impl.hpp
+++ b/graph/impl/KokkosGraph_Distance2Color_impl.hpp
@@ -157,7 +157,7 @@ class GraphColorDistance2 {
       colors_out = color_view_type("Graph Colors", this->nr);
     }
     switch (this->gc_handle->get_coloring_algo_type()) {
-      case COLORING_D2_VB_BIT_EF: using_edge_filtering = true;
+      case COLORING_D2_VB_BIT_EF: using_edge_filtering = true; [[fallthrough]];
       case COLORING_D2_VB_BIT:
       case COLORING_D2_VB: compute_d2_coloring_vb(colors_out); break;
       case COLORING_D2_NB_BIT: compute_d2_coloring_nb(colors_out); break;
diff --git a/graph/src/KokkosGraph_Triangle.hpp b/graph/src/KokkosGraph_Triangle.hpp
index 0a878891ce..f29078dbd3 100644
--- a/graph/src/KokkosGraph_Triangle.hpp
+++ b/graph/src/KokkosGraph_Triangle.hpp
@@ -164,10 +164,7 @@ void triangle_generic(KernelHandle *handle, typename KernelHandle::nnz_lno_t m,
   spgemmHandleType *sh = handle->get_spgemm_handle();
   switch (sh->get_algorithm_type()) {
     // case SPGEMM_KK_TRIANGLE_LL:
-    case SPGEMM_KK_TRIANGLE_AI:
-    case SPGEMM_KK_TRIANGLE_IA:
-    case SPGEMM_KK_TRIANGLE_IA_UNION:
-    default: {
+    case SPGEMM_KK_TRIANGLE_AI case SPGEMM_KK_TRIANGLE_IA case SPGEMM_KK_TRIANGLE_IA_UNION default: {
       KokkosSparse::Impl::KokkosSPGEMM<
           KernelHandle, alno_row_view_t_, alno_nnz_view_t_,
           typename KernelHandle::in_scalar_nnz_view_t, blno_row_view_t_,
diff --git a/perf_test/sparse/KokkosSparse_sptrsv.cpp b/perf_test/sparse/KokkosSparse_sptrsv.cpp
index 35e8b0e16e..2ae5afae50 100644
--- a/perf_test/sparse/KokkosSparse_sptrsv.cpp
+++ b/perf_test/sparse/KokkosSparse_sptrsv.cpp
@@ -279,6 +279,7 @@ int test_sptrsv_perf(std::vector<int> tests, const std::string &lfilename,
 #else
           std::cout << "CUSPARSE not enabled: Fall through to defaults"
                     << std::endl;
+          [[fallthrough]];
 #endif
         default:
           kh.create_sptrsv_handle(SPTRSVAlgorithm::SEQLVLSCHD_TP1, nrows,
@@ -681,6 +682,7 @@ int test_sptrsv_perf(std::vector<int> tests, const std::string &lfilename,
 #else
           std::cout << "CUSPARSE not enabled: Fall through to defaults"
                     << std::endl;
+          [[fallthrough]];
 #endif
         default:
           kh.create_sptrsv_handle(SPTRSVAlgorithm::SEQLVLSCHD_TP1, nrows,
diff --git a/sparse/impl/KokkosSparse_spgemm_impl_memaccess.hpp b/sparse/impl/KokkosSparse_spgemm_impl_memaccess.hpp
index 51d151e4fb..575ddca578 100644
--- a/sparse/impl/KokkosSparse_spgemm_impl_memaccess.hpp
+++ b/sparse/impl/KokkosSparse_spgemm_impl_memaccess.hpp
@@ -663,7 +663,7 @@ void KokkosSPGEMM<HandleType, a_row_view_t_, a_lno_nnz_view_t_,
                               cache_1_line_count);
                     }
                   } break;
-                  case 2: hyper_thread_ind = 1;
+                  case 2: hyper_thread_ind = 1; [[fallthrough]];
                   case 1: {
                     nnz_lno_t result_col_ind =
                         result_col + (hyper_thread_ind - 1) * b_col_cnt;