[stubs] Fix issues found by the machine graph verifier in load/store IC stubs.

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 7451f1ffcc916c757dd482c8b17a25c2534a5edc..71647eb10be65d7473b22e4395fa0a951c5d0df2 100644
--- a/src/code-stub-assembler.h
+++ b/src/code-stub-assembler.h
@@ -182,6 +182,8 @@ class V8_EXPORT_PRIVATE CodeStubAssembler : public compiler::CodeAssembler {
   Node* SelectTaggedConstant(Node* condition, Node* true_value,
                              Node* false_value);
 
+  Node* TruncateWordToWord32(Node* value);
+
   // Check a value for smi-ness
   Node* TaggedIsSmi(Node* a);
   Node* TaggedIsNotSmi(Node* a);