src/share/vm/adlc/formssel.cpp

rev 12121 : [mq]: all_changes.patch

*** 1,7 ****
  /*
!  * Copyright (c) 1998, 2015, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.
--- 1,7 ----
  /*
!  * Copyright (c) 1998, 2016, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.
*** 720,729 ****
--- 720,734 ----
          // unique def, no uses
        } else {
          // // unique def, some uses
          // // must return bottom unless all uses match def
          // unique = NULL;
+ #ifdef S390
+         // This case is important for move instructions on s390x.
+         // On other platforms (e.g. x86), all uses always match the def.
+         unique = NULL;
+ #endif
        }
      } else if( DEF_of_memory > 0 ) {
        // multiple defs, don't care about uses
        unique = NULL;
      } else if( USE_of_memory == 1) {