[turbofan] Improve representation selection for Smi checking.

src/compiler/simplified-operator.cc

Index: src/compiler/simplified-operator.cc
diff --git a/src/compiler/simplified-operator.cc b/src/compiler/simplified-operator.cc
index 40102fa8526db4cade7f9797a173c14171103a64..ee03ba07bc755cb3d8f8b7992cc4875743b3a4e2 100644
--- a/src/compiler/simplified-operator.cc
+++ b/src/compiler/simplified-operator.cc
@@ -425,22 +425,25 @@ PretenureFlag PretenureFlagOf(const Operator* op) {
   V(SpeculativeNumberLessThan)                \
   V(SpeculativeNumberLessThanOrEqual)
 
-#define CHECKED_OP_LIST(V)            \
-  V(CheckBounds, 2, 1)                \
-  V(CheckIf, 1, 0)                    \
-  V(CheckNumber, 1, 1)                \
-  V(CheckString, 1, 1)                \
-  V(CheckTaggedHole, 1, 1)            \
-  V(CheckTaggedPointer, 1, 1)         \
-  V(CheckTaggedSigned, 1, 1)          \
-  V(CheckedInt32Add, 2, 1)            \
-  V(CheckedInt32Sub, 2, 1)            \
-  V(CheckedInt32Div, 2, 1)            \
-  V(CheckedInt32Mod, 2, 1)            \
-  V(CheckedUint32Div, 2, 1)           \
-  V(CheckedUint32Mod, 2, 1)           \
-  V(CheckedUint32ToInt32, 1, 1)       \
-  V(CheckedTaggedSignedToInt32, 1, 1) \
+#define CHECKED_OP_LIST(V)             \
+  V(CheckBounds, 2, 1)                 \
+  V(CheckHeapObject, 1, 1)             \
+  V(CheckIf, 1, 0)                     \
+  V(CheckNumber, 1, 1)                 \
+  V(CheckSmi, 1, 1)                    \
+  V(CheckString, 1, 1)                 \
+  V(CheckTaggedHole, 1, 1)             \
+  V(CheckedInt32Add, 2, 1)             \
+  V(CheckedInt32Sub, 2, 1)             \
+  V(CheckedInt32Div, 2, 1)             \
+  V(CheckedInt32Mod, 2, 1)             \
+  V(CheckedUint32Div, 2, 1)            \
+  V(CheckedUint32Mod, 2, 1)            \
+  V(CheckedUint32ToInt32, 1, 1)        \
+  V(CheckedUint32ToTaggedSigned, 1, 1) \
+  V(CheckedInt32ToTaggedSigned, 1, 1)  \
+  V(CheckedTaggedSignedToInt32, 1, 1)  \
+  V(CheckedTaggedToTaggedSigned, 1, 1) \
   V(CheckedTruncateTaggedToWord32, 1, 1)
 
 struct SimplifiedOperatorGlobalCache final {