From cd84568bf4e21e782c032a43953652d717573180 Mon Sep 17 00:00:00 2001
From: Koch <jannik.koch@iosb.fraunhofer.de>
Date: Wed, 15 Jan 2020 15:08:48 +0100
Subject: [PATCH] fix: fix errors regarding Reducer functionalities in
 segment.cpp

---
 cpu/segment.cpp | 31 ++++++++++++++++---------------
 1 file changed, 16 insertions(+), 15 deletions(-)

diff --git a/cpu/segment.cpp b/cpu/segment.cpp
index f7c3767c..a33c5346 100644
--- a/cpu/segment.cpp
+++ b/cpu/segment.cpp
@@ -11,23 +11,24 @@ enum ReductionType { ADD, MEAN, MIN, MAX };
 
 #define AT_DISPATCH_REDUCTION_TYPES(reduce, ...)                               \
   [&] {                                                                        \
+    ReductionType REDUCE = ADD;                                                \
     if (reduce == "add") {                                                     \
-      const ReductionType REDUCE = ADD;                                        \
+      REDUCE = ADD;                                                            \
       return __VA_ARGS__();                                                    \
     } else if (reduce == "mean") {                                             \
-      const ReductionType REDUCE = MEAN;                                       \
+      REDUCE = MEAN;                                                           \
       return __VA_ARGS__();                                                    \
     } else if (reduce == "min") {                                              \
-      const ReductionType REDUCE = MIN;                                        \
+      REDUCE = MIN;                                                            \
       return __VA_ARGS__();                                                    \
     } else if (reduce == "max") {                                              \
-      const ReductionType REDUCE = MAX;                                        \
+      REDUCE = MAX;                                                            \
       return __VA_ARGS__();                                                    \
     }                                                                          \
   }()
 
-template <typename scalar_t, ReductionType REDUCE> struct Reducer {
-  static inline scalar_t init() {
+template <typename scalar_t> struct Reducer {
+  static inline scalar_t init(ReductionType REDUCE) {
     if (REDUCE == MIN) {
       return std::numeric_limits<scalar_t>::max();
     } else if (REDUCE == MAX) {
@@ -37,7 +38,7 @@ template <typename scalar_t, ReductionType REDUCE> struct Reducer {
     }
   }
 
-  static inline void update(scalar_t *val, scalar_t new_val) {
+  static inline void update(ReductionType REDUCE, scalar_t *val, scalar_t new_val) {
     if (REDUCE == ADD || REDUCE == MEAN) {
       *val = *val + new_val;
     } else if ((REDUCE == MIN && new_val < *val) ||
@@ -46,7 +47,7 @@ template <typename scalar_t, ReductionType REDUCE> struct Reducer {
     }
   }
 
-  static inline void update(scalar_t *val, scalar_t new_val, int64_t *arg,
+  static inline void update(ReductionType REDUCE, scalar_t *val, scalar_t new_val, int64_t *arg,
                             int64_t new_arg) {
     if (REDUCE == ADD || REDUCE == MEAN) {
       *val = *val + new_val;
@@ -57,7 +58,7 @@ template <typename scalar_t, ReductionType REDUCE> struct Reducer {
     }
   }
 
-  static inline void write(scalar_t *address, scalar_t val,
+  static inline void write(ReductionType REDUCE, scalar_t *address, scalar_t val,
                            int64_t *arg_address, int64_t arg, int count) {
     if (REDUCE == ADD) {
       *address = val;
@@ -136,16 +137,16 @@ segment_csr(at::Tensor src, at::Tensor indptr, at::optional<at::Tensor> out_opt,
 
         offset = (n / (indptr.size(-1) - 1)) * E * K;
         for (int k = 0; k < K; k++) {
-          vals[k] = Reducer<scalar_t, REDUCE>::init();
+          vals[k] = Reducer<scalar_t>::init(REDUCE);
         }
         for (int64_t e = row_start; e < row_end; e++) {
           for (int k = 0; k < K; k++) {
-            Reducer<scalar_t, REDUCE>::update(
+            Reducer<scalar_t>::update(REDUCE,
                 &vals[k], src_data[offset + e * K + k], &args[k], e);
           }
         }
         for (int k = 0; k < K; k++) {
-          Reducer<scalar_t, REDUCE>::write(out_data + n * K + k, vals[k],
+          Reducer<scalar_t>::write(REDUCE, out_data + n * K + k, vals[k],
                                            arg_out_data + n * K + k, args[k],
                                            row_end - row_start);
         }
@@ -214,13 +215,13 @@ segment_coo(at::Tensor src, at::Tensor index, at::Tensor out,
         for (int e_2 = 0; e_2 < E_2; e_2++) {
 
           for (int k = 0; k < K; k++) {
-            Reducer<scalar_t, REDUCE>::update(
+            Reducer<scalar_t>::update(REDUCE,
                 &vals[k], src_data[e_1 * E_2 * K + e_2 * K + k], &args[k], e_2);
           }
 
           if (e_2 == E_2 - 1) {
             for (int k = 0; k < K; k++) {
-              Reducer<scalar_t, REDUCE>::write(
+              Reducer<scalar_t>::write(REDUCE,
                   out_data + e_1 * N * K + idx * K + k, vals[k],
                   arg_out_data + e_1 * N * K + idx * K + k, args[k],
                   e_2 + 1 - row_start);
@@ -231,7 +232,7 @@ segment_coo(at::Tensor src, at::Tensor index, at::Tensor out,
 
             if (idx != next_idx) {
               for (int k = 0; k < K; k++) {
-                Reducer<scalar_t, REDUCE>::write(
+                Reducer<scalar_t>::write(REDUCE,
                     out_data + e_1 * N * K + idx * K + k, vals[k],
                     arg_out_data + e_1 * N * K + idx * K + k, args[k],
                     e_2 + 1 - row_start);