[turbofan] Optimize remainder of integer division by unknown power of two.

src/compiler/machine-operator.h

 // Copyright 2013 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.
 
 #ifndef V8_COMPILER_MACHINE_OPERATOR_H_
 #define V8_COMPILER_MACHINE_OPERATOR_H_
 
 #include "src/base/flags.h"
 #include "src/compiler/machine-type.h"
 
@@ skipping 49 matching lines @@
  public:
   // Flags that specify which operations are available. This is useful
   // for operations that are unsupported by some back-ends.
   enum Flag {
     kNoFlags = 0u,
     kFloat64Floor = 1u << 0,
     kFloat64Ceil = 1u << 1,
     kFloat64RoundTruncate = 1u << 2,
     kFloat64RoundTiesAway = 1u << 3,
     kInt32DivIsSafe = 1u << 4,
-    kInt32ModIsSafe = 1u << 5,
-    kUint32DivIsSafe = 1u << 6,
-    kUint32ModIsSafe = 1u << 7
+    kUint32DivIsSafe = 1u << 5
   };
   typedef base::Flags<Flag, unsigned> Flags;
 
   explicit MachineOperatorBuilder(Zone* zone, MachineType word = kMachPtr,
                                   Flags supportedOperators = kNoFlags);
 
   const Operator* Word32And();
   const Operator* Word32Or();
   const Operator* Word32Xor();
   const Operator* Word32Shl();
@@ skipping 20 matching lines @@
   const Operator* Int32Div();
   const Operator* Int32Mod();
   const Operator* Int32LessThan();
   const Operator* Int32LessThanOrEqual();
   const Operator* Uint32Div();
   const Operator* Uint32LessThan();
   const Operator* Uint32LessThanOrEqual();
   const Operator* Uint32Mod();
   const Operator* Uint32MulHigh();
   bool Int32DivIsSafe() const { return flags_ & kInt32DivIsSafe; }
-  bool Int32ModIsSafe() const { return flags_ & kInt32ModIsSafe; }
   bool Uint32DivIsSafe() const { return flags_ & kUint32DivIsSafe; }
-  bool Uint32ModIsSafe() const { return flags_ & kUint32ModIsSafe; }
 
   const Operator* Int64Add();
   const Operator* Int64Sub();
   const Operator* Int64Mul();
   const Operator* Int64Div();
   const Operator* Int64Mod();
   const Operator* Int64LessThan();
   const Operator* Int64LessThanOrEqual();
   const Operator* Uint64Div();
   const Operator* Uint64LessThan();
@@ skipping 92 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(MachineOperatorBuilder);
 };
 
 
 DEFINE_OPERATORS_FOR_FLAGS(MachineOperatorBuilder::Flags)
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_MACHINE_OPERATOR_H_