[turbofan] Reduce shl with sar/shr and same shift amount to bit-and.

src/compiler/machine-operator-reducer.h

Index: src/compiler/machine-operator-reducer.h
diff --git a/src/compiler/machine-operator-reducer.h b/src/compiler/machine-operator-reducer.h
index c79ceae204b791af36f9bbfd6a6735f8f2b68744..e40ad65cdc2aadbf41b8570bd88bfaf0d0042e22 100644
--- a/src/compiler/machine-operator-reducer.h
+++ b/src/compiler/machine-operator-reducer.h
@@ -31,6 +31,9 @@ class MachineOperatorReducer FINAL : public Reducer {
   Node* Float64Constant(volatile double value);
   Node* Int32Constant(int32_t value);
   Node* Int64Constant(int64_t value);
+  Node* Uint32Constant(uint32_t value) {
+    return Int32Constant(bit_cast<uint32_t>(value));
+  }
 
   Reduction ReplaceBool(bool value) { return ReplaceInt32(value ? 1 : 0); }
   Reduction ReplaceFloat32(volatile float value) {