src/cpu/sparc/vm/vm_version_sparc.cpp

rev 8797 : imported patch remove

@@ -83,31 +83,10 @@
   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);
     }