[UT] Fix the ut of search_aligned_mat_mul and search_seq_fc beacuse of 0*nan=nan (#4119)

test=develop test=xpu

lite/tests/kernels/search_aligned_mat_mul_compute_test.cc

@@ -103,6 +103,11 @@ class SearchAlignedMatMulComputeTester : public arena::TestCase {
     out->Resize(out_dims);
 
     auto out_data = out->mutable_data<float>();
+    // Prevent 0*nan=nan in basic_gemm
+    int64_t out_num = out_dims.production();
+    for (int64_t i = 0; i < out_num; i++) {
+      out_data[i] = 0;
+    }
     for (int i = 0; i < seq_num; i++) {
       basic_gemm<float, float>(x_transpose_,
                                y_transpose_,

lite/tests/kernels/search_seq_fc_compute_test.cc

@@ -87,12 +87,18 @@ class SearchSeqFcOPTest : public arena::TestCase {
     }
 
     out->set_lod(x_lod);
-    out->Resize({x_dims[0], w_dims[0]});
+    DDim out_dims({x_dims[0], w_dims[0]});
+    out->Resize(out_dims);
 
     int M = x_dims[0];
     int K = x_dims[1];
     int N = w_dims[0];
     auto out_data = out->mutable_data<float>();
+    // Prevent 0*nan=nan in basic_gemm
+    int64_t out_num = out_dims.production();
+    for (int64_t i = 0; i < out_num; i++) {
+      out_data[i] = 0;
+    }
     basic_gemm<float, float>(false,
                              true,
                              M,