[turbofan] Improve representation selection for HeapObject 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 400db97bdcf9d46aec097526afc6f29dfc05303a..be66d2fe050af7fe0ea9a9225296dd422a1d0ef7 100644
--- a/src/compiler/simplified-operator.cc
+++ b/src/compiler/simplified-operator.cc
@@ -404,6 +404,7 @@ UnicodeEncoding UnicodeEncodingOf(const Operator* op) {
   V(ChangeTaggedToUint32, Operator::kNoProperties, 1, 0)         \
   V(ChangeTaggedToFloat64, Operator::kNoProperties, 1, 0)        \
   V(ChangeFloat64ToTagged, Operator::kNoProperties, 1, 0)        \
+  V(ChangeFloat64ToTaggedPointer, Operator::kNoProperties, 1, 0) \
   V(ChangeInt31ToTaggedSigned, Operator::kNoProperties, 1, 0)    \
   V(ChangeInt32ToTagged, Operator::kNoProperties, 1, 0)          \
   V(ChangeUint32ToTagged, Operator::kNoProperties, 1, 0)         \
@@ -430,25 +431,26 @@ UnicodeEncoding UnicodeEncodingOf(const Operator* op) {
   V(SpeculativeNumberLessThan)                \
   V(SpeculativeNumberLessThanOrEqual)
 
-#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) \
+#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(CheckedTaggedToTaggedPointer, 1, 1) \
   V(CheckedTruncateTaggedToWord32, 1, 1)
 
 struct SimplifiedOperatorGlobalCache final {