[csa] Add assertions to CSA

src/code-stub-assembler.h

Index: src/code-stub-assembler.h
diff --git a/src/code-stub-assembler.h b/src/code-stub-assembler.h
index 50ec8976b68033547c98d6f034d7e22ee1e83e44..74da870d68af83953ca7360edad619c26db725ac 100644
--- a/src/code-stub-assembler.h
+++ b/src/code-stub-assembler.h
@@ -41,6 +41,7 @@ enum class PrimitiveType { kBoolean, kNumber, kString, kSymbol };
   V(HeapNumberMap, HeapNumberMap)                     \
   V(length_string, LengthString)                      \
   V(ManyClosuresCellMap, ManyClosuresCellMap)         \
+  V(MetaMap, MetaMap)                                 \
   V(MinusZeroValue, MinusZero)                        \
   V(MutableHeapNumberMap, MutableHeapNumberMap)       \
   V(NanValue, Nan)                                    \
@@ -117,6 +118,8 @@ class V8_EXPORT_PRIVATE CodeStubAssembler : public compiler::CodeAssembler {
     return value;
   }
 
+  Node* MatchesParameterMode(Node* value, ParameterMode mode);
+
 #define PARAMETER_BINOP(OpName, IntPtrOpName, SmiOpName) \
   Node* OpName(Node* a, Node* b, ParameterMode mode) {   \
     if (mode == SMI_PARAMETERS) {                        \
@@ -776,6 +779,7 @@ class V8_EXPORT_PRIVATE CodeStubAssembler : public compiler::CodeAssembler {
   Node* IsPropertyCell(Node* object);
   Node* IsAccessorInfo(Node* object);
   Node* IsAccessorPair(Node* object);
+  Node* IsAnyHeapNumber(Node* object);
   Node* IsHeapNumber(Node* object);
   Node* IsMutableHeapNumber(Node* object);
   Node* IsName(Node* object);
@@ -788,6 +792,9 @@ class V8_EXPORT_PRIVATE CodeStubAssembler : public compiler::CodeAssembler {
   Node* IsJSArrayInstanceType(Node* instance_type);
   Node* IsJSArray(Node* object);
   Node* IsJSArrayMap(Node* object);
+  Node* IsFixedArray(Node* object);
+  Node* IsFixedArrayWithKindOrEmpty(Node* object, ElementsKind kind);
+  Node* IsFixedArrayWithKind(Node* object, ElementsKind kind);
   Node* IsNativeContext(Node* object);
   Node* IsWeakCell(Node* object);
   Node* IsFixedDoubleArray(Node* object);
@@ -838,16 +845,6 @@ class V8_EXPORT_PRIVATE CodeStubAssembler : public compiler::CodeAssembler {
   Node* StringAdd(Node* context, Node* first, Node* second,
                   AllocationFlags flags = kNone);
 
-  // Unpack the external string, returning a pointer that (offset-wise) looks
-  // like a sequential string.
-  // Note that this pointer is not tagged and does not point to a real
-  // sequential string instance, and may only be used to access the string
-  // data. The pointer is GC-safe as long as a reference to the container
-  // ExternalString is live.
-  // |string| must be an external string. Bailout for short external strings.
-  Node* TryDerefExternalString(Node* const string, Node* const instance_type,
-                               Label* if_bailout);
-
   // Check if |string| is an indirect (thin or flat cons) string type that can
   // be dereferenced by DerefIndirectString.
   void BranchIfCanDerefIndirectString(Node* string, Node* instance_type,