[turbofan] Improve representation selection for Smi checking.

src/compiler/opcodes.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_OPCODES_H_
 #define V8_COMPILER_OPCODES_H_
 
 #include <iosfwd>
 
 // Opcodes for control operators.
@@ skipping 172 matching lines @@
   V(TruncateTaggedToBit)
 
 #define SIMPLIFIED_CHECKED_OP_LIST(V) \
   V(CheckedInt32Add)                  \
   V(CheckedInt32Sub)                  \
   V(CheckedInt32Div)                  \
   V(CheckedInt32Mod)                  \
   V(CheckedUint32Div)                 \
   V(CheckedUint32Mod)                 \
   V(CheckedInt32Mul)                  \
+  V(CheckedInt32ToTaggedSigned)       \
   V(CheckedUint32ToInt32)             \
+  V(CheckedUint32ToTaggedSigned)      \
   V(CheckedFloat64ToInt32)            \
   V(CheckedTaggedSignedToInt32)       \
   V(CheckedTaggedToInt32)             \
   V(CheckedTruncateTaggedToWord32)    \
-  V(CheckedTaggedToFloat64)
+  V(CheckedTaggedToFloat64)           \
+  V(CheckedTaggedToTaggedSigned)
 
 #define SIMPLIFIED_COMPARE_BINOP_LIST(V) \
   V(NumberEqual)                         \
   V(NumberLessThan)                      \
   V(NumberLessThanOrEqual)               \
   V(SpeculativeNumberEqual)              \
   V(SpeculativeNumberLessThan)           \
   V(SpeculativeNumberLessThanOrEqual)    \
   V(ReferenceEqual)                      \
   V(StringEqual)                         \
@@ skipping 70 matching lines @@
   V(PlainPrimitiveToWord32)         \
   V(PlainPrimitiveToFloat64)        \
   V(BooleanNot)                     \
   V(StringCharCodeAt)               \
   V(StringFromCharCode)             \
   V(CheckBounds)                    \
   V(CheckIf)                        \
   V(CheckMaps)                      \
   V(CheckNumber)                    \
   V(CheckString)                    \
-  V(CheckTaggedPointer)             \
-  V(CheckTaggedSigned)              \
+  V(CheckSmi)                       \
+  V(CheckHeapObject)                \
   V(CheckFloat64Hole)               \
   V(CheckTaggedHole)                \
   V(ConvertTaggedHoleToUndefined)   \
   V(Allocate)                       \
   V(LoadField)                      \
   V(LoadBuffer)                     \
   V(LoadElement)                    \
   V(LoadTypedElement)               \
   V(StoreField)                     \
   V(StoreBuffer)                    \
@@ skipping 455 matching lines @@
   }
 };
 
 std::ostream& operator<<(std::ostream&, IrOpcode::Value);
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_OPCODES_H_