src/cpu/sparc/vm/c1_LIRAssembler_sparc.cpp

rev 3688 : 7054512: Compress class pointers after perm gen removal
Summary: support of compress class pointers in the compilers.
Reviewed-by:

*** 103,112 ****
--- 103,117 ----
        if (UseCompressedOops) {
          if (dst->is_address() && !dst->is_stack() && (dst->type() == T_OBJECT || dst->type() == T_ARRAY)) return false;
          if (src->is_address() && !src->is_stack() && (src->type() == T_OBJECT || src->type() == T_ARRAY)) return false;
        }
        
+       if (UseCompressedKlassPointers) {
+         if (src->is_address() && !src->is_stack() && src->type() == T_ADDRESS &&
+             src->as_address_ptr()->disp() == oopDesc::klass_offset_in_bytes()) return false;
+       }
+ 
        if (dst->is_register()) {
          if (src->is_address() && Assembler::is_simm13(src->as_address_ptr()->disp())) {
            return !PatchALot;
          } else if (src->is_single_stack()) {
            return true;
*** 967,978 ****
              __ ld(base, offset + hi_word_offset_in_bytes, to_reg->as_register_hi());
            }
  #endif
          }
          break;
!       case T_METADATA:
!       case T_ADDRESS:  __ ld_ptr(base, offset, to_reg->as_register()); break;
        case T_ARRAY : // fall through
        case T_OBJECT:
          {
            if (UseCompressedOops && !wide) {
              __ lduw(base, offset, to_reg->as_register());
--- 972,990 ----
              __ ld(base, offset + hi_word_offset_in_bytes, to_reg->as_register_hi());
            }
  #endif
          }
          break;
!       case T_METADATA:  __ ld_ptr(base, offset, to_reg->as_register()); break;
!       case T_ADDRESS:
!         if (UseCompressedKlassPointers && offset == oopDesc::klass_offset_in_bytes()) {
!           __ lduw(base, offset, to_reg->as_register());
!           __ decode_klass_not_null(to_reg->as_register());
!         } else {
!           __ ld_ptr(base, offset, to_reg->as_register());
!         }
!         break;
        case T_ARRAY : // fall through
        case T_OBJECT:
          {
            if (UseCompressedOops && !wide) {
              __ lduw(base, offset, to_reg->as_register());
*** 2342,2352 ****
      Label known_ok, halt;
      metadata2reg(op->expected_type()->constant_encoding(), tmp);
      if (UseCompressedKlassPointers) {
        // tmp holds the default type. It currently comes uncompressed after the
        // load of a constant, so encode it.
!       __ encode_heap_oop(tmp);
        // load the raw value of the dst klass, since we will be comparing
        // uncompressed values directly.
        __ lduw(dst, oopDesc::klass_offset_in_bytes(), tmp2);
        if (basic_type != T_OBJECT) {
          __ cmp(tmp, tmp2);
--- 2354,2364 ----
      Label known_ok, halt;
      metadata2reg(op->expected_type()->constant_encoding(), tmp);
      if (UseCompressedKlassPointers) {
        // tmp holds the default type. It currently comes uncompressed after the
        // load of a constant, so encode it.
!       __ encode_klass_not_null(tmp);
        // load the raw value of the dst klass, since we will be comparing
        // uncompressed values directly.
        __ lduw(dst, oopDesc::klass_offset_in_bytes(), tmp2);
        if (basic_type != T_OBJECT) {
          __ cmp(tmp, tmp2);