Add areFlattenableValueTypesEnabled() for JIT

eclipse-openj9#17394 has added new flag J9VM_OPT_VALHALLA_FLATTENABLE_VALUE_TYPES for flattenable value types. The value object code is under the existing J9VM_OPT_VALHALLA_VALUE_TYPES. Add new API areFlattenableValueTypesEnabled() for JIT. issue eclipse-openj9#17235 Signed-off-by: Hang Shao <[email protected]>
midronij · Jun 1, 2023 · 14b810a · 14b810a
1 parent 0b04292
commit 14b810a
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diff --git a/runtime/oti/j9nonbuilder.h b/runtime/oti/j9nonbuilder.h
@@ -4957,6 +4957,7 @@ typedef struct J9InternalVMFunctions {
 	void ( *setNestmatesError)(struct J9VMThread *vmThread, struct J9Class *nestMember, struct J9Class *nestHost, IDATA errorCode);
 #endif /* JAVA_SPEC_VERSION >= 11 */
 	BOOLEAN ( *areValueTypesEnabled)(struct J9JavaVM *vm);
+	BOOLEAN ( *areFlattenableValueTypesEnabled)(struct J9JavaVM *vm);
 	J9Class* ( *peekClassHashTable)(struct J9VMThread* currentThread, J9ClassLoader* classLoader, U_8* className, UDATA classNameLength);
 #if defined(J9VM_OPT_JITSERVER)
 	BOOLEAN ( *isJITServerEnabled )(struct J9JavaVM *vm);

diff --git a/runtime/oti/vm_api.h b/runtime/oti/vm_api.h
@@ -1665,6 +1665,14 @@ printBytecodePairs(J9JavaVM *vm);
 BOOLEAN
 areValueTypesEnabled(J9JavaVM *vm);
 
+/**
+ * @brief Queries whether flattenable valueTypes are enable on the JVM
+ * @param vm A handle to the J9JavaVM
+ * @return TRUE if flattenable valueTypes are enabled, FALSE otherwise
+ */
+BOOLEAN
+areFlattenableValueTypesEnabled(J9JavaVM *vm);
+
 /**
  * Checks if args in specified args array have been consumed by the JVM, if not it outputs a warning message
  * and returns FALSE. This function consults the -XXvm:ignoreUnrecognized, -XX:[+|-]IgnoreUnrecognizedVMOptions

diff --git a/runtime/vm/ValueTypeHelpers.cpp b/runtime/vm/ValueTypeHelpers.cpp
@@ -253,6 +253,16 @@ areValueTypesEnabled(J9JavaVM *vm)
 #endif /* defined(J9VM_OPT_VALHALLA_VALUE_TYPES) */
 }
 
+BOOLEAN
+areFlattenableValueTypesEnabled(J9JavaVM *vm)
+{
+#if defined(J9VM_OPT_VALHALLA_FLATTENABLE_VALUE_TYPES)
+	return TRUE;
+#else /* defined(J9VM_OPT_VALHALLA_FLATTENABLE_VALUE_TYPES) */
+	return FALSE;
+#endif /* defined(J9VM_OPT_VALHALLA_FLATTENABLE_VALUE_TYPES) */
+}
+
 j9object_t*
 getDefaultValueSlotAddress(J9Class* clazz)
 {

diff --git a/runtime/vm/intfunc.c b/runtime/vm/intfunc.c
@@ -374,6 +374,7 @@ J9InternalVMFunctions J9InternalFunctions = {
 	setNestmatesError,
 #endif /* JAVA_SPEC_VERSION >= 11 */
 	areValueTypesEnabled,
+	areFlattenableValueTypesEnabled,
 	peekClassHashTable,
 #if defined(J9VM_OPT_JITSERVER)
 	isJITServerEnabled,