message: Don't populate linear_ with a logical index
  We use linear_ to directly emit array element access in some cases so populating
  it with the logical linear index seems incorrect.
diff: @@ -90,7 +90,6 @@ IrArray::Index::Index(tensorflow::gtl::ArraySlice<llvm::Value*> multidim,
  dims_(shape.dimensions().begin(), shape.dimensions().end()) {
  CHECK_EQ(shape.dimensions_size(), multidim.size());
  CHECK(LayoutUtil::HasLayout(shape));
  - linear_ = Linearize(AsInt64Slice(shape.dimensions()), ir_builder);
  }
  IrArray::IrArray(llvm::Value* base_ptr, const Shape& shape)
  