[turbofan] Optimize division/modulus by constant.

src/compiler/machine-operator.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/compiler/machine-operator.h"
 
 #include "src/base/lazy-instance.h"
 #include "src/compiler/opcodes.h"
 #include "src/compiler/operator.h"
 
@@ skipping 57 matching lines @@
   V(Word64Shr, Operator::kNoProperties, 2, 1)                                 \
   V(Word64Sar, Operator::kNoProperties, 2, 1)                                 \
   V(Word64Ror, Operator::kNoProperties, 2, 1)                                 \
   V(Word64Equal, Operator::kCommutative, 2, 1)                                \
   V(Int32Add, Operator::kAssociative | Operator::kCommutative, 2, 1)          \
   V(Int32AddWithOverflow, Operator::kAssociative | Operator::kCommutative, 2, \
     2)                                                                        \
   V(Int32Sub, Operator::kNoProperties, 2, 1)                                  \
   V(Int32SubWithOverflow, Operator::kNoProperties, 2, 2)                      \
   V(Int32Mul, Operator::kAssociative | Operator::kCommutative, 2, 1)          \
+  V(Int32MulHigh, Operator::kAssociative | Operator::kCommutative, 2, 1)      \
   V(Int32Div, Operator::kNoProperties, 2, 1)                                  \
   V(Int32Mod, Operator::kNoProperties, 2, 1)                                  \
   V(Int32LessThan, Operator::kNoProperties, 2, 1)                             \
   V(Int32LessThanOrEqual, Operator::kNoProperties, 2, 1)                      \
   V(Uint32Div, Operator::kNoProperties, 2, 1)                                 \
   V(Uint32LessThan, Operator::kNoProperties, 2, 1)                            \
   V(Uint32LessThanOrEqual, Operator::kNoProperties, 2, 1)                     \
   V(Uint32Mod, Operator::kNoProperties, 2, 1)                                 \
   V(Int64Add, Operator::kAssociative | Operator::kCommutative, 2, 1)          \
   V(Int64Sub, Operator::kNoProperties, 2, 1)                                  \
@@ skipping 144 matching lines @@
     default:
       break;
   }
   UNREACHABLE();
   return NULL;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8