[turbofan] introduce Int32/64AbsWithOverflow optional operator

src/compiler/code-assembler.h

 // Copyright 2015 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_CODE_ASSEMBLER_H_
 #define V8_COMPILER_CODE_ASSEMBLER_H_
 
 #include <map>
 #include <memory>
 
@@ skipping 149 matching lines @@
   V(ChangeUint32ToUint64)               \
   V(RoundFloat64ToInt32)                \
   V(RoundInt32ToFloat32)                \
   V(Float64SilenceNaN)                  \
   V(Float64RoundDown)                   \
   V(Float64RoundUp)                     \
   V(Float64RoundTiesEven)               \
   V(Float64RoundTruncate)               \
   V(Word32Clz)                          \
   V(Word32Not)                          \
+  V(Int32AbsWithOverflow)               \
+  V(Int64AbsWithOverflow)               \
+  V(IntPtrAbsWithOverflow)              \
   V(Word32BinaryNot)
 
 // A "public" interface used by components outside of compiler directory to
 // create code objects with TurboFan's backend. This class is mostly a thin shim
 // around the RawMachineAssembler, and its primary job is to ensure that the
 // innards of the RawMachineAssembler and other compiler implementation details
 // don't leak outside of the the compiler directory..
 //
 // V8 components that need to generate low-level code using this interface
 // should include this header--and this header only--from the compiler directory
@@ skipping 14 matching lines @@
   explicit CodeAssembler(CodeAssemblerState* state) : state_(state) {}
   ~CodeAssembler();
 
   static Handle<Code> GenerateCode(CodeAssemblerState* state);
 
   bool Is64() const;
   bool IsFloat64RoundUpSupported() const;
   bool IsFloat64RoundDownSupported() const;
   bool IsFloat64RoundTiesEvenSupported() const;
   bool IsFloat64RoundTruncateSupported() const;
+  bool IsInt32AbsWithOverflowSupported() const;
+  bool IsInt64AbsWithOverflowSupported() const;
+  bool IsIntPtrAbsWithOverflowSupported() const;
 
   // Shortened aliases for use in CodeAssembler subclasses.
   typedef CodeAssemblerLabel Label;
   typedef CodeAssemblerVariable Variable;
   typedef CodeAssemblerVariableList VariableList;
 
   // ===========================================================================
   // Base Assembler
   // ===========================================================================
 
@@ skipping 317 matching lines @@
   CodeAssemblerCallback call_epilogue_;
 
   DISALLOW_COPY_AND_ASSIGN(CodeAssemblerState);
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_CODE_ASSEMBLER_H_