diff --git a/mlir/include/mlir/IR/BuiltinAttributes.td b/mlir/include/mlir/IR/BuiltinAttributes.td
--- a/mlir/include/mlir/IR/BuiltinAttributes.td
+++ b/mlir/include/mlir/IR/BuiltinAttributes.td
@@ -237,7 +237,7 @@
     /// element type of 'type'. 'type' must be a vector or tensor with static
     /// shape.
     ///
-    /// If the `values` array only has a single element, then this  constructs
+    /// If the `values` array only has a single element, then this constructs
     /// splat of that value.
     static DenseElementsAttr getRaw(ShapedType type, size_t storageWidth,
                                     ArrayRef<APFloat> values);
@@ -246,7 +246,7 @@
     /// Each APInt value is expected to have the same bitwidth as the element
     /// type of 'type'. 'type' must be a vector or tensor with static shape.
     ///
-    /// If the `values` array only has a single element, then this  constructs
+    /// If the `values` array only has a single element, then this constructs
     /// splat of that value.
     static DenseElementsAttr getRaw(ShapedType type, size_t storageWidth,
                                     ArrayRef<APInt> values);
@@ -254,7 +254,7 @@
     /// Get or create a new dense elements attribute instance with the given raw
     /// data buffer. 'type' must be a vector or tensor with static shape.
     ///
-    /// If the `values` array only has a single element, then this  constructs
+    /// If the `values` array only has a single element, then this constructs
     /// splat of that value.
     static DenseElementsAttr getRaw(ShapedType type, ArrayRef<char> data);
 
@@ -315,7 +315,7 @@
   let builders = [
     AttrBuilderWithInferredContext<(ins "ShapedType":$type,
                                         "ArrayRef<StringRef>":$values), [{
-      return $_get(type.getContext(), type, values, 
+      return $_get(type.getContext(), type, values,
                    /* isSplat */(values.size() == 1));
     }]>,
   ];
diff --git a/mlir/lib/IR/BuiltinAttributes.cpp b/mlir/lib/IR/BuiltinAttributes.cpp
--- a/mlir/lib/IR/BuiltinAttributes.cpp
+++ b/mlir/lib/IR/BuiltinAttributes.cpp
@@ -736,7 +736,8 @@
       setBit(buff.data(), i, values[i]);
     }
 
-    if (isSplat) { // special encoding for splat.
+    // Splat of bool is encoded as a byte with all-ones in it.
+    if (isSplat) {
       buff.resize(1);
       buff[0] = values[0] ? -1 : 0;
     }