[turbofan] Optimize division/modulus by constant.

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 d8978a4f127db9859d071a9bacc71f48db5a5e8a..92c2337b9b9f5c5757dc5864033555d56f116105 100644
--- a/src/compiler/machine-operator-reducer.h
+++ b/src/compiler/machine-operator-reducer.h
@@ -34,6 +34,14 @@ class MachineOperatorReducer FINAL : public Reducer {
   Node* Uint32Constant(uint32_t value) {
     return Int32Constant(bit_cast<uint32_t>(value));
   }
+  Node* Word32And(Node* lhs, uint32_t rhs);
+  Node* Word32Sar(Node* lhs, uint32_t rhs);
+  Node* Word32Shr(Node* lhs, uint32_t rhs);
+  Node* Int32Add(Node* lhs, Node* rhs);
+  Node* Int32Sub(Node* lhs, Node* rhs);
+  Node* Int32Mul(Node* lhs, Node* rhs);
+
+  Node* TruncatingDiv(Node* dividend, int32_t divisor);
 
   Reduction ReplaceBool(bool value) { return ReplaceInt32(value ? 1 : 0); }
   Reduction ReplaceFloat32(volatile float value) {
@@ -49,6 +57,7 @@ class MachineOperatorReducer FINAL : public Reducer {
     return Replace(Int64Constant(value));
   }
 
+  Reduction ReduceInt32Div(Node* node);
   Reduction ReduceInt32Mod(Node* node);
   Reduction ReduceProjection(size_t index, Node* node);