[turbofan] Complete support for integer division/modulus in simplified lowering.

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 42 matching lines @@
 StoreRepresentation const& StoreRepresentationOf(Operator const*);
 
 
 // Interface for building machine-level operators. These operators are
 // machine-level but machine-independent and thus define a language suitable
 // for generating code to run on architectures such as ia32, x64, arm, etc.
 class MachineOperatorBuilder FINAL : public ZoneObject {
  public:
   // Flags that specify which operations are available. This is useful
   // for operations that are unsupported by some back-ends.
-  enum class Flag : unsigned {
-    kNoFlags = 0,
-    kFloat64Floor = 1 << 0,
-    kFloat64Ceil = 1 << 1,
-    kFloat64RoundTruncate = 1 << 2,
-    kFloat64RoundTiesAway = 1 << 3
+  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
   };
   typedef base::Flags<Flag, unsigned> Flags;
 
   explicit MachineOperatorBuilder(MachineType word = kMachPtr,
-                                  Flags supportedOperators = Flag::kNoFlags);
+                                  Flags supportedOperators = kNoFlags);
 
   const Operator* Word32And();
   const Operator* Word32Or();
   const Operator* Word32Xor();
   const Operator* Word32Shl();
   const Operator* Word32Shr();
   const Operator* Word32Sar();
   const Operator* Word32Ror();
   const Operator* Word32Equal();
 
@@ skipping 13 matching lines @@
   const Operator* Int32Mul();
   const Operator* Int32MulHigh();
   const Operator* Int32Div();
   const Operator* Int32Mod();
   const Operator* Int32LessThan();
   const Operator* Int32LessThanOrEqual();
   const Operator* Uint32Div();
   const Operator* Uint32LessThan();
   const Operator* Uint32LessThanOrEqual();
   const Operator* Uint32Mod();
+  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 29 matching lines @@
   // Floating point comparisons complying to IEEE 754.
   const Operator* Float64Equal();
   const Operator* Float64LessThan();
   const Operator* Float64LessThanOrEqual();
 
   // Floating point rounding.
   const Operator* Float64Floor();
   const Operator* Float64Ceil();
   const Operator* Float64RoundTruncate();
   const Operator* Float64RoundTiesAway();
-  bool HasFloat64Floor() { return flags_ & Flag::kFloat64Floor; }
-  bool HasFloat64Ceil() { return flags_ & Flag::kFloat64Ceil; }
-  bool HasFloat64RoundTruncate() {
-    return flags_ & Flag::kFloat64RoundTruncate;
-  }
-  bool HasFloat64RoundTiesAway() {
-    return flags_ & Flag::kFloat64RoundTiesAway;
-  }
+  bool HasFloat64Floor() { return flags_ & kFloat64Floor; }
+  bool HasFloat64Ceil() { return flags_ & kFloat64Ceil; }
+  bool HasFloat64RoundTruncate() { return flags_ & kFloat64RoundTruncate; }
+  bool HasFloat64RoundTiesAway() { return flags_ & kFloat64RoundTiesAway; }
 
   // load [base + index]
   const Operator* Load(LoadRepresentation rep);
 
   // store [base + index], value
   const Operator* Store(StoreRepresentation rep);
 
   // Access to the machine stack.
   const Operator* LoadStackPointer();
 
@@ skipping 38 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_