src/cpu/sparc/vm/vm_version_sparc.cpp

rev 8797 : imported patch remove

*** 83,113 ****
    UseSSE = 0; // Only on x86 and x64
  
    _supports_cx8 = has_v9();
    _supports_atomic_getset4 = true; // swap instruction
  
-   // There are Fujitsu Sparc64 CPUs which support blk_init as well so
-   // we have to take this check out of the 'is_niagara()' block below.
-   if (has_blk_init()) {
-     // When using CMS or G1, we cannot use memset() in BOT updates
-     // because the sun4v/CMT version in libc_psr uses BIS which
-     // exposes "phantom zeros" to concurrent readers. See 6948537.
-     if (FLAG_IS_DEFAULT(UseMemSetInBOT) && (UseConcMarkSweepGC || UseG1GC)) {
-       FLAG_SET_DEFAULT(UseMemSetInBOT, false);
-     }
-     // Issue a stern warning if the user has explicitly set
-     // UseMemSetInBOT (it is known to cause issues), but allow
-     // use for experimentation and debugging.
-     if (UseConcMarkSweepGC || UseG1GC) {
-       if (UseMemSetInBOT) {
-         assert(!FLAG_IS_DEFAULT(UseMemSetInBOT), "Error");
-         warning("Experimental flag -XX:+UseMemSetInBOT is known to cause instability"
-                 " on sun4v; please understand that you are using at your own risk!");
-       }
-     }
-   }
- 
    if (is_niagara()) {
      // Indirect branch is the same cost as direct
      if (FLAG_IS_DEFAULT(UseInlineCaches)) {
        FLAG_SET_DEFAULT(UseInlineCaches, false);
      }
--- 83,92 ----