Upstream-Status: Backport

Hotspot compiler has a bug where signed integers could overflow. This is 
undefined behaviour, and causes massive memory leak when compiled with GCC 5.0+, 
causing the build to fail.

This is fixed by backporting patch from 
https://bugs.openjdk.java.net/browse/JDK-8078666 where it was fixed by 
Severin Gehwolf.

Signed-off-by: Erkka Kääriä <erkka.kaaria@intel.com>

--- openjdk/hotspot/src/share/vm/opto/type.cpp
+++ openjdk/hotspot/src/share/vm/opto/type.cpp
@@ -1077,11 +1077,11 @@ static int normalize_int_widen( jint lo, jint hi, int w ) {
   // Certain normalizations keep us sane when comparing types.
   // The 'SMALLINT' covers constants and also CC and its relatives.
   if (lo <= hi) {
-    if ((juint)(hi - lo) <= SMALLINT)  w = Type::WidenMin;
-    if ((juint)(hi - lo) >= max_juint) w = Type::WidenMax; // TypeInt::INT
+    if (((juint)hi - lo) <= SMALLINT)  w = Type::WidenMin;
+    if (((juint)hi - lo) >= max_juint) w = Type::WidenMax; // TypeInt::INT
   } else {
-    if ((juint)(lo - hi) <= SMALLINT)  w = Type::WidenMin;
-    if ((juint)(lo - hi) >= max_juint) w = Type::WidenMin; // dual TypeInt::INT
+    if (((juint)lo - hi) <= SMALLINT)  w = Type::WidenMin;
+    if (((juint)lo - hi) >= max_juint) w = Type::WidenMin; // dual TypeInt::INT  
   }
   return w;
 }
@@ -1332,11 +1332,11 @@ static int normalize_long_widen( jlong lo, jlong hi, int w ) {
   // Certain normalizations keep us sane when comparing types.
   // The 'SMALLINT' covers constants.
   if (lo <= hi) {
-    if ((julong)(hi - lo) <= SMALLINT)   w = Type::WidenMin;
-    if ((julong)(hi - lo) >= max_julong) w = Type::WidenMax; // TypeLong::LONG
+    if (((julong)hi - lo) <= SMALLINT)   w = Type::WidenMin;
+    if (((julong)hi - lo) >= max_julong) w = Type::WidenMax; // TypeLong::LONG  
   } else {
-    if ((julong)(lo - hi) <= SMALLINT)   w = Type::WidenMin;
-    if ((julong)(lo - hi) >= max_julong) w = Type::WidenMin; // dual TypeLong::LONG
+    if (((julong)lo - hi) <= SMALLINT)   w = Type::WidenMin;
+    if (((julong)lo - hi) >= max_julong) w = Type::WidenMin; // dual TypeLong::LONG
   }
   return w;
 }
-- 
2.1.4