[turbofan] Basic reductions of 64-bit machine operators.

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 2d8d30e80da1b762176c21e2fd618bad452e138b..574f45c0b3a9bb7ba08f90667aaba5316d4e97e4 100644
--- a/src/compiler/machine-operator-reducer.h
+++ b/src/compiler/machine-operator-reducer.h
@@ -32,7 +32,10 @@ class MachineOperatorReducer final : public Reducer {
   Node* Int32Constant(int32_t value);
   Node* Int64Constant(int64_t value);
   Node* Uint32Constant(uint32_t value) {
-    return Int32Constant(bit_cast<uint32_t>(value));
+    return Int32Constant(bit_cast<int32_t>(value));
+  }
+  Node* Uint64Constant(uint64_t value) {
+    return Int64Constant(bit_cast<int64_t>(value));
   }
   Node* Float64Mul(Node* lhs, Node* rhs);
   Node* Float64PowHalf(Node* value);
@@ -67,7 +70,9 @@ class MachineOperatorReducer final : public Reducer {
   }
 
   Reduction ReduceInt32Add(Node* node);
+  Reduction ReduceInt64Add(Node* node);
   Reduction ReduceInt32Sub(Node* node);
+  Reduction ReduceInt64Sub(Node* node);
   Reduction ReduceInt32Div(Node* node);
   Reduction ReduceUint32Div(Node* node);
   Reduction ReduceInt32Mod(Node* node);
@@ -76,8 +81,11 @@ class MachineOperatorReducer final : public Reducer {
   Reduction ReduceProjection(size_t index, Node* node);
   Reduction ReduceWord32Shifts(Node* node);
   Reduction ReduceWord32Shl(Node* node);
+  Reduction ReduceWord64Shl(Node* node);
   Reduction ReduceWord32Shr(Node* node);
+  Reduction ReduceWord64Shr(Node* node);
   Reduction ReduceWord32Sar(Node* node);
+  Reduction ReduceWord64Sar(Node* node);
   Reduction ReduceWord32And(Node* node);
   Reduction TryMatchWord32Ror(Node* node);
   Reduction ReduceWord32Or(Node* node);