hotspot/src/share/vm/c1/c1_LIRGenerator.cpp
changeset 43676 c6eed495a42b
parent 42544 58de8aaf9365
child 44315 1e2f842b0c96
--- a/hotspot/src/share/vm/c1/c1_LIRGenerator.cpp	Tue Jan 31 01:11:40 2017 +0300
+++ b/hotspot/src/share/vm/c1/c1_LIRGenerator.cpp	Tue Jan 31 18:42:45 2017 +0100
@@ -1752,8 +1752,10 @@
   if (x->needs_null_check() &&
       (needs_patching ||
        MacroAssembler::needs_explicit_null_check(x->offset()))) {
-    // emit an explicit null check because the offset is too large
-    __ null_check(object.result(), new CodeEmitInfo(info));
+    // Emit an explicit null check because the offset is too large.
+    // If the class is not loaded and the object is NULL, we need to deoptimize to throw a
+    // NoClassDefFoundError in the interpreter instead of an implicit NPE from compiled code.
+    __ null_check(object.result(), new CodeEmitInfo(info), /* deoptimize */ needs_patching);
   }
 
   LIR_Address* address;
@@ -1838,8 +1840,10 @@
       obj = new_register(T_OBJECT);
       __ move(LIR_OprFact::oopConst(NULL), obj);
     }
-    // emit an explicit null check because the offset is too large
-    __ null_check(obj, new CodeEmitInfo(info));
+    // Emit an explicit null check because the offset is too large.
+    // If the class is not loaded and the object is NULL, we need to deoptimize to throw a
+    // NoClassDefFoundError in the interpreter instead of an implicit NPE from compiled code.
+    __ null_check(obj, new CodeEmitInfo(info), /* deoptimize */ needs_patching);
   }
 
   LIR_Opr reg = rlock_result(x, field_type);