src/cpu/sparc/vm/c1_LIRAssembler_sparc.cpp

rev 4139 : 8160591: Improve internal array handling
Reviewed-by: kvn
Contributed-by: Xiang Yuan <xiang.yuan@linaro.org>, Zoltan Majo <zoltan.majo@oracle.com>

*** 2127,2136 ****
--- 2127,2157 ----
      __ tst(dst);
      __ brx(Assembler::equal, false, Assembler::pn, *stub->entry());
      __ delayed()->nop();
    }
  
+   // If the compiler was not able to prove that exact type of the source or the destination
+   // of the arraycopy is an array type, check at runtime if the source or the destination is
+   // an instance type.
+   if (flags & LIR_OpArrayCopy::type_check) {
+     if (!(flags & LIR_OpArrayCopy::LIR_OpArrayCopy::dst_objarray)) {
+       __ load_klass(dst, tmp);
+       __ lduw(tmp, in_bytes(Klass::layout_helper_offset()), tmp2);
+       __ cmp(tmp2, Klass::_lh_neutral_value);
+       __ br(Assembler::greaterEqual, false, Assembler::pn, *stub->entry());
+       __ delayed()->nop();
+     }
+ 
+     if (!(flags & LIR_OpArrayCopy::LIR_OpArrayCopy::src_objarray)) {
+       __ load_klass(src, tmp);
+       __ lduw(tmp, in_bytes(Klass::layout_helper_offset()), tmp2);
+       __ cmp(tmp2, Klass::_lh_neutral_value);
+       __ br(Assembler::greaterEqual, false, Assembler::pn, *stub->entry());
+       __ delayed()->nop();
+     }
+   }
+ 
    if (flags & LIR_OpArrayCopy::src_pos_positive_check) {
      // test src_pos register
      __ cmp_zero_and_br(Assembler::less, src_pos, *stub->entry());
      __ delayed()->nop();
    }