8022395: java.util.zip.ZipException: Not in GZIP format in JT_JDK/test/java/util/zip/GZIP tests

Reviewed-by: kvn, iveresov

src/cpu/x86/vm/c1_LIRGenerator_x86.cpp

@@ -941,6 +941,8 @@ void LIRGenerator::do_update_CRC32(Intrinsic* x) {
     case vmIntrinsics::_updateCRC32: {
       LIRItem crc(x->argument_at(0), this);
       LIRItem val(x->argument_at(1), this);
+      // val is destroyed by update_crc32
+      val.set_destroys_register();
       crc.load_item();
       val.load_item();
       __ update_crc32(crc.result(), val.result(), result);