Merge pull request #21978 from nbhuiyan/bigcallees-oj9mh

Enable bigCallee size adjustment during ECS for JDK8 and 11

Author: hzongaro

runtime/compiler/optimizer/J9EstimateCodeSize.cpp

@@ -1838,13 +1838,7 @@ TR_J9EstimateCodeSize::realEstimateCodeSize(TR_CallTarget *calltarget, TR_CallSt
                         }
                      }
 
-#if defined(J9VM_OPT_OPENJDK_METHODHANDLE)
                   int32_t bigCalleesSizeBelowMe = _bigCalleesSize - origBigCalleesSize;
-#else
-                  // Temporarily disable bigCalleeSize adjustment for OpenJ9 MethodHandle implementation as it exposes a functional issue
-                  // with the change in inlining behaviour resulting from this big callee adjustment.
-                  int32_t bigCalleesSizeBelowMe = 0;
-#endif /* J9VM_OPT_OPENJDK_METHODHANDLE */
                   if ((_analyzedSize - origAnalyzedSize - bigCalleesSizeBelowMe) > bigCalleeThreshold)
                      {
                      ///printf("set warmcallgraphtoobig for method %s at index %d\n", calleeName, newBCInfo._byteCodeIndex);fflush(stdout);