6962569: assembler_sparc.cpp:1969: assert(false) failed: error

Summary: array_overlap_test() fails when the address range crosses the MSB boundary. Thanks to Tom and Vladimir for their help on this one.
Reviewed-by: kvn, never, iveresov

src/cpu/sparc/vm/stubGenerator_sparc.cpp

@@ -1007,9 +1007,9 @@ class StubGenerator: public StubCodeGenerator {
         __ brx(Assembler::lessEqualUnsigned, false, Assembler::pt, (*NOLp));
       __ delayed()->cmp(to_from, byte_count);
       if (NOLp == NULL)
-        __ brx(Assembler::greaterEqual, false, Assembler::pt, no_overlap_target);
+        __ brx(Assembler::greaterEqualUnsigned, false, Assembler::pt, no_overlap_target);
       else
-        __ brx(Assembler::greaterEqual, false, Assembler::pt, (*NOLp));
+        __ brx(Assembler::greaterEqualUnsigned, false, Assembler::pt, (*NOLp));
       __ delayed()->nop();
   }