--- old/src/cpu/x86/vm/c1_LIRGenerator_x86.cpp	2014-01-16 13:47:53.000000000 -0800
+++ new/src/cpu/x86/vm/c1_LIRGenerator_x86.cpp	2014-01-16 13:47:53.000000000 -0800
@@ -941,6 +941,8 @@
     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);