diff --git a/mlir/include/mlir/Dialect/Vector/VectorOps.td b/mlir/include/mlir/Dialect/Vector/VectorOps.td
--- a/mlir/include/mlir/Dialect/Vector/VectorOps.td
+++ b/mlir/include/mlir/Dialect/Vector/VectorOps.td
@@ -270,6 +270,7 @@
     }
   }];
   let assemblyFormat = "$source attr-dict `:` type($source) `to` type($vector)";
+  let hasFolder = 1;
 }
 
 def Vector_ShuffleOp :
diff --git a/mlir/lib/Dialect/Vector/VectorOps.cpp b/mlir/lib/Dialect/Vector/VectorOps.cpp
--- a/mlir/lib/Dialect/Vector/VectorOps.cpp
+++ b/mlir/lib/Dialect/Vector/VectorOps.cpp
@@ -929,6 +929,20 @@
   return success();
 }
 
+OpFoldResult BroadcastOp::fold(ArrayRef<Attribute> operands) {
+  if (source().getType().isIntOrIndexOrFloat()) {
+    if (auto cst = source().getDefiningOp<ConstantOp>()) {
+      return DenseElementsAttr::get(getResult().getType().cast<ShapedType>(),
+                                    cst.value());
+    }
+  }
+  if (auto prevOp = source().getDefiningOp<vector::BroadcastOp>()) {
+    setOperand(prevOp.source());
+    return getResult();
+  }
+  return {};
+}
+
 //===----------------------------------------------------------------------===//
 // ShuffleOp
 //===----------------------------------------------------------------------===//
diff --git a/mlir/test/Dialect/Vector/canonicalize.mlir b/mlir/test/Dialect/Vector/canonicalize.mlir
--- a/mlir/test/Dialect/Vector/canonicalize.mlir
+++ b/mlir/test/Dialect/Vector/canonicalize.mlir
@@ -385,3 +385,26 @@
   %2 = vector.bitcast %1 : vector<4xi16> to vector<2xi32>
   return %0, %2 : vector<4x8xf32>, vector<2xi32>
 }
+
+// -----
+
+// CHECK-LABEL: broadcast_folding1
+//       CHECK: constant
+//   CHECK-NOT: vector.broadcast
+func @broadcast_folding1() -> vector<4xf32> {
+  %0 = constant 0.0 : f32
+  %1 = vector.broadcast %0 : f32 to vector<4xf32>
+  return %1 : vector<4xf32>
+}
+
+// -----
+
+// CHECK-LABEL: @broadcast_folding2
+//  CHECK-SAME: %[[ARG0:.*]]: f32
+//       CHECK: %[[RES:.*]] = vector.broadcast %[[ARG0]] : f32 to vector<4x16xf32>
+//       CHECK: return %[[RES]]
+func @broadcast_folding2(%arg0: f32) -> vector<4x16xf32> {
+  %0 = vector.broadcast %arg0 : f32 to vector<16xf32>
+  %1 = vector.broadcast %0 : vector<16xf32> to vector<4x16xf32>
+  return %1 : vector<4x16xf32>
+}