Fix split-k gemm test (#231)

* properly return error flag; reveals bug in split-k gemm

* fix bug in split k

* update split-k test case
Co-authored-by: Chao Liu <chao.liu2@amd.com>

test/gemm_split_k/gemm_split_k.cpp

@@ -226,9 +226,8 @@ int main(int argc, char* argv[])
     std::vector<gemmArgs> test_cases;
     if(argc == 1)
     {
-        test_cases = {{GemmMatrixLayout::MK_KN_MN, 3, 3, 3, 3, 3, 3, 1}};
-        // JD: Populate with more and meaningful
-        return 0;
+        test_cases = {{GemmMatrixLayout::MK_KN_MN, 1024, 1024, 1024, 1024, 1024, 1024, 2},
+                      {GemmMatrixLayout::MK_KN_MN, 1024, 1024, 1024, 1024, 1024, 1024, 8}};
     }
     else if(argc == 9)
     {
@@ -253,11 +252,10 @@ int main(int argc, char* argv[])
         printf("arg2 to 7: M, N, K, StrideA, StrideB, StrideC KBatch\n");
         return -1;
     }
+    bool error = false;
     for(const auto& kinder : test_cases)
     {
-        const auto res = test_gemm(kinder);
-        if(!res)
-            return -1;
+        error |= test_gemm(kinder);
     }
-    return 0;
+    return error ? 1 : 0;
 }