[FIX] Add braces to if-else statements (#11493)

Some if-else statements were missing braces. They have been added as per
our style guide.

Author: Tristan Konolige

include/tvm/topi/nn/softmax.h

@@ -67,10 +67,11 @@ inline Tensor softmax(const Tensor& x, int axis = -1, std::string name = "tensor
     Array<PrimExpr> eval_range;
     int arg_counter = 0;
     for (size_t i = 0; i < ndim; ++i) {
-      if (static_cast<int>(i) == axis)
+      if (static_cast<int>(i) == axis) {
         eval_range.push_back(reduce_index);
-      else
+      } else {
         eval_range.push_back(indices[arg_counter++]);
+      }
     }
     return eval_range;
   };

include/tvm/topi/transform.h

@@ -1467,10 +1467,11 @@ inline Tensor tensordot(const Tensor& A, const tvm::te::Tensor& B, int axes = 2,
     for (; it != input_indices.end(); ++it) B_indices.push_back(*it);
 
     // Some passes don't like reductions with empty axis, so avoid it here
-    if (iter_vars.empty())
+    if (iter_vars.empty()) {
       return A(A_indices) * B(B_indices);
-    else
+    } else {
       return sum(A(A_indices) * B(B_indices), iter_vars);
+    }
   };
 
   return compute(output_shape, func, name, tag);
@@ -1513,19 +1514,21 @@ inline Tensor tensordot(const Tensor& A, const tvm::te::Tensor& B, Array<PrimExp
     Array<PrimExpr> A_indices;
     for (unsigned i = 0; i < A->shape.size(); ++i) {
       auto axes_pos = std::find(A_axes_val.begin(), A_axes_val.end(), i);
-      if (axes_pos == A_axes_val.end())
+      if (axes_pos == A_axes_val.end()) {
         A_indices.push_back(input_indices[idx_input++]);
-      else
+      } else {
         A_indices.push_back(iter_vars[axes_pos - A_axes_val.begin()]);
+      }
     }
 
     Array<PrimExpr> B_indices;
     for (unsigned i = 0; i < B->shape.size(); ++i) {
       auto axes_pos = std::find(B_axes_val.begin(), B_axes_val.end(), i);
-      if (axes_pos == B_axes_val.end())
+      if (axes_pos == B_axes_val.end()) {
         B_indices.push_back(input_indices[idx_input++]);
-      else
+      } else {
         B_indices.push_back(iter_vars[axes_pos - B_axes_val.begin()]);
+      }
     }
     return sum(A(A_indices) * B(B_indices), iter_vars);
   };

src/meta_schedule/utils.h

@@ -83,16 +83,17 @@ class PyLogMessage {
     if (this->logging_func.defined()) {
       logging_func(static_cast<int>(logging_level), stream_.str());
     } else {
-      if (logging_level == Level::INFO)
+      if (logging_level == Level::INFO) {
         LOG(INFO) << stream_.str();
-      else if (logging_level == Level::WARNING)
+      } else if (logging_level == Level::WARNING) {
         LOG(WARNING) << stream_.str();
-      else if (logging_level == Level::ERROR)
+      } else if (logging_level == Level::ERROR) {
         LOG(ERROR) << stream_.str();
-      else if (logging_level == Level::DEBUG)
+      } else if (logging_level == Level::DEBUG) {
         DLOG(INFO) << stream_.str();
-      else
+      } else {
         LOG(FATAL) << stream_.str();
+      }
     }
   }
   std::ostringstream& stream() { return stream_; }