8010667: Non-zero padding is not allowed in splitverifier for...

8010667: Non-zero padding is not allowed in splitverifier for tableswitch/lookupswitch instructions.
Summary: Don't check the padding bits if class file version is >= 51.
Reviewed-by: kvn, dholmes, coleenp

src/share/vm/classfile/verifier.cpp

@@ -62,6 +62,7 @@
 #endif
 
 #define NOFAILOVER_MAJOR_VERSION                       51
+#define NONZERO_PADDING_BYTES_IN_SWITCH_MAJOR_VERSION  51
 #define STATIC_METHOD_IN_INTERFACE_MAJOR_VERSION       52
 
 // Access to external entry for VerifyClassCodes - old byte code verifier
@@ -2027,6 +2028,7 @@ void ClassVerifier::verify_switch(
   address bcp = bcs->bcp();
   address aligned_bcp = (address) round_to((intptr_t)(bcp + 1), jintSize);
 
+  if (_klass->major_version() < NONZERO_PADDING_BYTES_IN_SWITCH_MAJOR_VERSION) {
     // 4639449 & 4647081: padding bytes must be 0
     u2 padding_offset = 1;
     while ((bcp + padding_offset) < aligned_bcp) {
@@ -2037,6 +2039,8 @@ void ClassVerifier::verify_switch(
       }
       padding_offset++;
     }
+  }
+
   int default_offset = (int) Bytes::get_Java_u4(aligned_bcp);
   int keys, delta;
   current_frame->pop_stack(