From 6c372db64cb6e7459a579f4e482747c1bbfdedaf Mon Sep 17 00:00:00 2001
From: Annabelle Huo <Annabelle.Huo@ibm.com>
Date: Wed, 25 May 2022 10:41:48 -0400
Subject: [PATCH] Add defaultValueSymbol for value type class

This symbol is used to access the default instance
associated with a class, if any exists.

Signed-off-by: Annabelle Huo <Annabelle.Huo@ibm.com>
---
 compiler/compile/OMRNonHelperSymbols.enum    | 7 ++++++-
 compiler/compile/OMRSymbolReferenceTable.hpp | 7 ++++++-
 compiler/ras/Debug.cpp                       | 5 ++++-
 3 files changed, 16 insertions(+), 3 deletions(-)

diff --git a/compiler/compile/OMRNonHelperSymbols.enum b/compiler/compile/OMRNonHelperSymbols.enum
index 5d244e9cb81..0d7fea999bb 100644
--- a/compiler/compile/OMRNonHelperSymbols.enum
+++ b/compiler/compile/OMRNonHelperSymbols.enum
@@ -399,7 +399,12 @@
     */
    J9JNIMethodIDvTableIndexFieldSymbol,
 
-   OMRlastPrintableCommonNonhelperSymbol = J9JNIMethodIDvTableIndexFieldSymbol,
+   /** \brief
+    * This symbol is used to access the default instance associated with a class, if any exists
+    */
+   defaultValueSymbol,
+
+   OMRlastPrintableCommonNonhelperSymbol = defaultValueSymbol,
 
    firstPerCodeCacheHelperSymbol,
    lastPerCodeCacheHelperSymbol = firstPerCodeCacheHelperSymbol + TR_numCCPreLoadedCode - 1,
diff --git a/compiler/compile/OMRSymbolReferenceTable.hpp b/compiler/compile/OMRSymbolReferenceTable.hpp
index e492b99fad7..72d7a532b42 100644
--- a/compiler/compile/OMRSymbolReferenceTable.hpp
+++ b/compiler/compile/OMRSymbolReferenceTable.hpp
@@ -476,7 +476,12 @@ class SymbolReferenceTable
        */
       J9JNIMethodIDvTableIndexFieldSymbol,
 
-      OMRlastPrintableCommonNonhelperSymbol = J9JNIMethodIDvTableIndexFieldSymbol,
+      /** \brief
+       * This symbol is used to access the default instance associated with a class, if any exists
+       */
+      defaultValueSymbol,
+
+      OMRlastPrintableCommonNonhelperSymbol = defaultValueSymbol,
 
       firstPerCodeCacheHelperSymbol,
       lastPerCodeCacheHelperSymbol = firstPerCodeCacheHelperSymbol + TR_numCCPreLoadedCode - 1,
diff --git a/compiler/ras/Debug.cpp b/compiler/ras/Debug.cpp
index 86149e6c1a4..b92c6ee1619 100644
--- a/compiler/ras/Debug.cpp
+++ b/compiler/ras/Debug.cpp
@@ -1626,6 +1626,8 @@ TR_Debug::getName(TR::SymbolReference * symRef)
              return "<nonNullableArrayNullStoreCheck>";
          case TR::SymbolReferenceTable::J9JNIMethodIDvTableIndexFieldSymbol:
              return "<J9JNIMethodIDvTableIndexFieldSymbol>";
+         case TR::SymbolReferenceTable::defaultValueSymbol:
+             return "<defaultValue>";
          }
       }
 
@@ -2090,7 +2092,8 @@ static const char *commonNonhelperSymbolNames[] =
    "<j9VMThreadTempSlotField>",
    "<computedStaticCallSymbol>",
    "<j9VMThreadFloatTemp1>",
-   "<J9JNIMethodIDvTableIndexFieldSymbol>"
+   "<J9JNIMethodIDvTableIndexFieldSymbol>",
+   "<defaultValue>"
    };
 
 const char *