# HG changeset patch
# User roland
# Date 1347373257 -7200
# Node ID 8a02ca5e55760f0af3a85969a08d39ac00562d35
# Parent  ec98e58952b241da990341a4f143d9ba4918f017
7195816: NPG: Crash in c1_ValueType - ShouldNotReachHere
Summary: C1 needs knowledge of T_METADATA at the LIR level.
Reviewed-by: kvn, coleenp

diff -r ec98e58952b2 -r 8a02ca5e5576 src/cpu/sparc/vm/c1_FrameMap_sparc.cpp
--- a/src/cpu/sparc/vm/c1_FrameMap_sparc.cpp	Tue Sep 11 14:59:23 2012 +0200
+++ b/src/cpu/sparc/vm/c1_FrameMap_sparc.cpp	Tue Sep 11 16:20:57 2012 +0200
@@ -147,6 +147,39 @@
 LIR_Opr FrameMap::I6_oop_opr;
 LIR_Opr FrameMap::I7_oop_opr;
 
+LIR_Opr FrameMap::G0_metadata_opr;
+LIR_Opr FrameMap::G1_metadata_opr;
+LIR_Opr FrameMap::G2_metadata_opr;
+LIR_Opr FrameMap::G3_metadata_opr;
+LIR_Opr FrameMap::G4_metadata_opr;
+LIR_Opr FrameMap::G5_metadata_opr;
+LIR_Opr FrameMap::G6_metadata_opr;
+LIR_Opr FrameMap::G7_metadata_opr;
+LIR_Opr FrameMap::O0_metadata_opr;
+LIR_Opr FrameMap::O1_metadata_opr;
+LIR_Opr FrameMap::O2_metadata_opr;
+LIR_Opr FrameMap::O3_metadata_opr;
+LIR_Opr FrameMap::O4_metadata_opr;
+LIR_Opr FrameMap::O5_metadata_opr;
+LIR_Opr FrameMap::O6_metadata_opr;
+LIR_Opr FrameMap::O7_metadata_opr;
+LIR_Opr FrameMap::L0_metadata_opr;
+LIR_Opr FrameMap::L1_metadata_opr;
+LIR_Opr FrameMap::L2_metadata_opr;
+LIR_Opr FrameMap::L3_metadata_opr;
+LIR_Opr FrameMap::L4_metadata_opr;
+LIR_Opr FrameMap::L5_metadata_opr;
+LIR_Opr FrameMap::L6_metadata_opr;
+LIR_Opr FrameMap::L7_metadata_opr;
+LIR_Opr FrameMap::I0_metadata_opr;
+LIR_Opr FrameMap::I1_metadata_opr;
+LIR_Opr FrameMap::I2_metadata_opr;
+LIR_Opr FrameMap::I3_metadata_opr;
+LIR_Opr FrameMap::I4_metadata_opr;
+LIR_Opr FrameMap::I5_metadata_opr;
+LIR_Opr FrameMap::I6_metadata_opr;
+LIR_Opr FrameMap::I7_metadata_opr;
+
 LIR_Opr FrameMap::SP_opr;
 LIR_Opr FrameMap::FP_opr;
 
@@ -310,6 +343,39 @@
   I6_oop_opr = as_oop_opr(I6);
   I7_oop_opr = as_oop_opr(I7);
 
+  G0_metadata_opr = as_metadata_opr(G0);
+  G1_metadata_opr = as_metadata_opr(G1);
+  G2_metadata_opr = as_metadata_opr(G2);
+  G3_metadata_opr = as_metadata_opr(G3);
+  G4_metadata_opr = as_metadata_opr(G4);
+  G5_metadata_opr = as_metadata_opr(G5);
+  G6_metadata_opr = as_metadata_opr(G6);
+  G7_metadata_opr = as_metadata_opr(G7);
+  O0_metadata_opr = as_metadata_opr(O0);
+  O1_metadata_opr = as_metadata_opr(O1);
+  O2_metadata_opr = as_metadata_opr(O2);
+  O3_metadata_opr = as_metadata_opr(O3);
+  O4_metadata_opr = as_metadata_opr(O4);
+  O5_metadata_opr = as_metadata_opr(O5);
+  O6_metadata_opr = as_metadata_opr(O6);
+  O7_metadata_opr = as_metadata_opr(O7);
+  L0_metadata_opr = as_metadata_opr(L0);
+  L1_metadata_opr = as_metadata_opr(L1);
+  L2_metadata_opr = as_metadata_opr(L2);
+  L3_metadata_opr = as_metadata_opr(L3);
+  L4_metadata_opr = as_metadata_opr(L4);
+  L5_metadata_opr = as_metadata_opr(L5);
+  L6_metadata_opr = as_metadata_opr(L6);
+  L7_metadata_opr = as_metadata_opr(L7);
+  I0_metadata_opr = as_metadata_opr(I0);
+  I1_metadata_opr = as_metadata_opr(I1);
+  I2_metadata_opr = as_metadata_opr(I2);
+  I3_metadata_opr = as_metadata_opr(I3);
+  I4_metadata_opr = as_metadata_opr(I4);
+  I5_metadata_opr = as_metadata_opr(I5);
+  I6_metadata_opr = as_metadata_opr(I6);
+  I7_metadata_opr = as_metadata_opr(I7);
+
   FP_opr = as_pointer_opr(FP);
   SP_opr = as_pointer_opr(SP);
 
diff -r ec98e58952b2 -r 8a02ca5e5576 src/cpu/sparc/vm/c1_FrameMap_sparc.hpp
--- a/src/cpu/sparc/vm/c1_FrameMap_sparc.hpp	Tue Sep 11 14:59:23 2012 +0200
+++ b/src/cpu/sparc/vm/c1_FrameMap_sparc.hpp	Tue Sep 11 16:20:57 2012 +0200
@@ -104,6 +104,39 @@
   static LIR_Opr I6_oop_opr;
   static LIR_Opr I7_oop_opr;
 
+  static LIR_Opr G0_metadata_opr;
+  static LIR_Opr G1_metadata_opr;
+  static LIR_Opr G2_metadata_opr;
+  static LIR_Opr G3_metadata_opr;
+  static LIR_Opr G4_metadata_opr;
+  static LIR_Opr G5_metadata_opr;
+  static LIR_Opr G6_metadata_opr;
+  static LIR_Opr G7_metadata_opr;
+  static LIR_Opr O0_metadata_opr;
+  static LIR_Opr O1_metadata_opr;
+  static LIR_Opr O2_metadata_opr;
+  static LIR_Opr O3_metadata_opr;
+  static LIR_Opr O4_metadata_opr;
+  static LIR_Opr O5_metadata_opr;
+  static LIR_Opr O6_metadata_opr;
+  static LIR_Opr O7_metadata_opr;
+  static LIR_Opr L0_metadata_opr;
+  static LIR_Opr L1_metadata_opr;
+  static LIR_Opr L2_metadata_opr;
+  static LIR_Opr L3_metadata_opr;
+  static LIR_Opr L4_metadata_opr;
+  static LIR_Opr L5_metadata_opr;
+  static LIR_Opr L6_metadata_opr;
+  static LIR_Opr L7_metadata_opr;
+  static LIR_Opr I0_metadata_opr;
+  static LIR_Opr I1_metadata_opr;
+  static LIR_Opr I2_metadata_opr;
+  static LIR_Opr I3_metadata_opr;
+  static LIR_Opr I4_metadata_opr;
+  static LIR_Opr I5_metadata_opr;
+  static LIR_Opr I6_metadata_opr;
+  static LIR_Opr I7_metadata_opr;
+
   static LIR_Opr in_long_opr;
   static LIR_Opr out_long_opr;
   static LIR_Opr g1_long_single_opr;
diff -r ec98e58952b2 -r 8a02ca5e5576 src/cpu/sparc/vm/c1_LIRAssembler_sparc.cpp
--- a/src/cpu/sparc/vm/c1_LIRAssembler_sparc.cpp	Tue Sep 11 14:59:23 2012 +0200
+++ b/src/cpu/sparc/vm/c1_LIRAssembler_sparc.cpp	Tue Sep 11 16:20:57 2012 +0200
@@ -447,9 +447,12 @@
 
   if (compilation()->env()->dtrace_method_probes()) {
     __ mov(G2_thread, O0);
+    __ save_thread(I1); // need to preserve thread in G2 across
+                        // runtime call
     metadata2reg(method()->constant_encoding(), O1);
     __ call(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit), relocInfo::runtime_call_type);
     __ delayed()->nop();
+    __ restore_thread(I1);
   }
 
   if (method()->is_synchronized() || compilation()->env()->dtrace_method_probes()) {
@@ -843,6 +846,7 @@
 #endif
         break;
       case T_ADDRESS:
+      case T_METADATA:
         __ st_ptr(from_reg->as_register(), base, offset);
         break;
       case T_ARRAY : // fall through
@@ -965,6 +969,7 @@
 #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:
@@ -1366,6 +1371,7 @@
 void LIR_Assembler::mem2reg(LIR_Opr src_opr, LIR_Opr dest, BasicType type,
                             LIR_PatchCode patch_code, CodeEmitInfo* info, bool wide, bool unaligned) {
 
+  assert(type != T_METADATA, "load of metadata ptr not supported");
   LIR_Address* addr = src_opr->as_address_ptr();
   LIR_Opr to_reg = dest;
 
@@ -1513,6 +1519,7 @@
 void LIR_Assembler::reg2mem(LIR_Opr from_reg, LIR_Opr dest, BasicType type,
                             LIR_PatchCode patch_code, CodeEmitInfo* info, bool pop_fpu_stack,
                             bool wide, bool unaligned) {
+  assert(type != T_METADATA, "store of metadata ptr not supported");
   LIR_Address* addr = dest->as_address_ptr();
 
   Register src = addr->base()->as_pointer_register();
diff -r ec98e58952b2 -r 8a02ca5e5576 src/cpu/sparc/vm/c1_LIRGenerator_sparc.cpp
--- a/src/cpu/sparc/vm/c1_LIRGenerator_sparc.cpp	Tue Sep 11 14:59:23 2012 +0200
+++ b/src/cpu/sparc/vm/c1_LIRGenerator_sparc.cpp	Tue Sep 11 16:20:57 2012 +0200
@@ -884,7 +884,7 @@
   LIR_Opr tmp2 = FrameMap::G3_oop_opr;
   LIR_Opr tmp3 = FrameMap::G4_oop_opr;
   LIR_Opr tmp4 = FrameMap::O1_oop_opr;
-  LIR_Opr klass_reg = FrameMap::G5_oop_opr;
+  LIR_Opr klass_reg = FrameMap::G5_metadata_opr;
   new_instance(reg, x->klass(), tmp1, tmp2, tmp3, tmp4, klass_reg, info);
   LIR_Opr result = rlock_result(x);
   __ move(reg, result);
@@ -903,11 +903,11 @@
   LIR_Opr tmp2 = FrameMap::G3_oop_opr;
   LIR_Opr tmp3 = FrameMap::G4_oop_opr;
   LIR_Opr tmp4 = FrameMap::O1_oop_opr;
-  LIR_Opr klass_reg = FrameMap::G5_oop_opr;
+  LIR_Opr klass_reg = FrameMap::G5_metadata_opr;
   LIR_Opr len = length.result();
   BasicType elem_type = x->elt_type();
 
-  __ oop2reg(ciTypeArrayKlass::make(elem_type)->constant_encoding(), klass_reg);
+  __ metadata2reg(ciTypeArrayKlass::make(elem_type)->constant_encoding(), klass_reg);
 
   CodeStub* slow_path = new NewTypeArrayStub(klass_reg, len, reg, info);
   __ allocate_array(reg, len, tmp1, tmp2, tmp3, tmp4, elem_type, klass_reg, slow_path);
@@ -935,7 +935,7 @@
   LIR_Opr tmp2 = FrameMap::G3_oop_opr;
   LIR_Opr tmp3 = FrameMap::G4_oop_opr;
   LIR_Opr tmp4 = FrameMap::O1_oop_opr;
-  LIR_Opr klass_reg = FrameMap::G5_oop_opr;
+  LIR_Opr klass_reg = FrameMap::G5_metadata_opr;
   LIR_Opr len = length.result();
 
   CodeStub* slow_path = new NewObjectArrayStub(klass_reg, len, reg, info);
@@ -985,8 +985,8 @@
 
   // This instruction can be deoptimized in the slow path : use
   // O0 as result register.
-  const LIR_Opr reg = result_register_for(x->type());
-  klass2reg_with_patching(reg, x->klass(), patching_info);
+  const LIR_Opr klass_reg = FrameMap::O0_metadata_opr;
+  klass2reg_with_patching(klass_reg, x->klass(), patching_info);
   LIR_Opr rank = FrameMap::O1_opr;
   __ move(LIR_OprFact::intConst(x->rank()), rank);
   LIR_Opr varargs = FrameMap::as_pointer_opr(O2);
@@ -995,9 +995,10 @@
          LIR_OprFact::intptrConst(offset_from_sp),
          varargs);
   LIR_OprList* args = new LIR_OprList(3);
-  args->append(reg);
+  args->append(klass_reg);
   args->append(rank);
   args->append(varargs);
+  const LIR_Opr reg = result_register_for(x->type());
   __ call_runtime(Runtime1::entry_for(Runtime1::new_multi_array_id),
                   LIR_OprFact::illegalOpr,
                   reg, args, info);
diff -r ec98e58952b2 -r 8a02ca5e5576 src/cpu/sparc/vm/sharedRuntime_sparc.cpp
--- a/src/cpu/sparc/vm/sharedRuntime_sparc.cpp	Tue Sep 11 14:59:23 2012 +0200
+++ b/src/cpu/sparc/vm/sharedRuntime_sparc.cpp	Tue Sep 11 16:20:57 2012 +0200
@@ -1340,6 +1340,7 @@
       case T_ADDRESS: // raw pointers, like current thread, for VM calls
       case T_ARRAY:
       case T_OBJECT:
+      case T_METADATA:
         regs[i].set2( int_stk_helper( j ) );
         break;
       case T_FLOAT:
@@ -1388,6 +1389,7 @@
       case T_FLOAT:
       case T_INT:
       case T_OBJECT:
+      case T_METADATA:
       case T_SHORT:
         regs[i].set1( int_stk_helper( i ) );
         break;
diff -r ec98e58952b2 -r 8a02ca5e5576 src/cpu/x86/vm/c1_FrameMap_x86.cpp
--- a/src/cpu/x86/vm/c1_FrameMap_x86.cpp	Tue Sep 11 14:59:23 2012 +0200
+++ b/src/cpu/x86/vm/c1_FrameMap_x86.cpp	Tue Sep 11 16:20:57 2012 +0200
@@ -96,6 +96,13 @@
 LIR_Opr FrameMap::rdx_oop_opr;
 LIR_Opr FrameMap::rcx_oop_opr;
 
+LIR_Opr FrameMap::rsi_metadata_opr;
+LIR_Opr FrameMap::rdi_metadata_opr;
+LIR_Opr FrameMap::rbx_metadata_opr;
+LIR_Opr FrameMap::rax_metadata_opr;
+LIR_Opr FrameMap::rdx_metadata_opr;
+LIR_Opr FrameMap::rcx_metadata_opr;
+
 LIR_Opr FrameMap::long0_opr;
 LIR_Opr FrameMap::long1_opr;
 LIR_Opr FrameMap::fpu0_float_opr;
@@ -122,6 +129,13 @@
 LIR_Opr FrameMap::r12_oop_opr;
 LIR_Opr FrameMap::r13_oop_opr;
 LIR_Opr FrameMap::r14_oop_opr;
+
+LIR_Opr  FrameMap::r8_metadata_opr;
+LIR_Opr  FrameMap::r9_metadata_opr;
+LIR_Opr FrameMap::r11_metadata_opr;
+LIR_Opr FrameMap::r12_metadata_opr;
+LIR_Opr FrameMap::r13_metadata_opr;
+LIR_Opr FrameMap::r14_metadata_opr;
 #endif // _LP64
 
 LIR_Opr FrameMap::_caller_save_cpu_regs[] = { 0, };
@@ -236,6 +250,13 @@
   rdx_oop_opr = as_oop_opr(rdx);
   rcx_oop_opr = as_oop_opr(rcx);
 
+  rsi_metadata_opr = as_metadata_opr(rsi);
+  rdi_metadata_opr = as_metadata_opr(rdi);
+  rbx_metadata_opr = as_metadata_opr(rbx);
+  rax_metadata_opr = as_metadata_opr(rax);
+  rdx_metadata_opr = as_metadata_opr(rdx);
+  rcx_metadata_opr = as_metadata_opr(rcx);
+
   rsp_opr = as_pointer_opr(rsp);
   rbp_opr = as_pointer_opr(rbp);
 
@@ -246,6 +267,13 @@
   r12_oop_opr = as_oop_opr(r12);
   r13_oop_opr = as_oop_opr(r13);
   r14_oop_opr = as_oop_opr(r14);
+
+  r8_metadata_opr = as_metadata_opr(r8);
+  r9_metadata_opr = as_metadata_opr(r9);
+  r11_metadata_opr = as_metadata_opr(r11);
+  r12_metadata_opr = as_metadata_opr(r12);
+  r13_metadata_opr = as_metadata_opr(r13);
+  r14_metadata_opr = as_metadata_opr(r14);
 #endif // _LP64
 
   VMRegPair regs;
diff -r ec98e58952b2 -r 8a02ca5e5576 src/cpu/x86/vm/c1_FrameMap_x86.hpp
--- a/src/cpu/x86/vm/c1_FrameMap_x86.hpp	Tue Sep 11 14:59:23 2012 +0200
+++ b/src/cpu/x86/vm/c1_FrameMap_x86.hpp	Tue Sep 11 16:20:57 2012 +0200
@@ -73,6 +73,14 @@
   static LIR_Opr rax_oop_opr;
   static LIR_Opr rdx_oop_opr;
   static LIR_Opr rcx_oop_opr;
+
+  static LIR_Opr rsi_metadata_opr;
+  static LIR_Opr rdi_metadata_opr;
+  static LIR_Opr rbx_metadata_opr;
+  static LIR_Opr rax_metadata_opr;
+  static LIR_Opr rdx_metadata_opr;
+  static LIR_Opr rcx_metadata_opr;
+
 #ifdef _LP64
 
   static LIR_Opr  r8_opr;
@@ -92,6 +100,14 @@
   static LIR_Opr r13_oop_opr;
   static LIR_Opr r14_oop_opr;
 
+  static LIR_Opr  r8_metadata_opr;
+  static LIR_Opr  r9_metadata_opr;
+
+  static LIR_Opr r11_metadata_opr;
+  static LIR_Opr r12_metadata_opr;
+  static LIR_Opr r13_metadata_opr;
+  static LIR_Opr r14_metadata_opr;
+
 #endif // _LP64
 
   static LIR_Opr long0_opr;
diff -r ec98e58952b2 -r 8a02ca5e5576 src/cpu/x86/vm/c1_LIRAssembler_x86.cpp
--- a/src/cpu/x86/vm/c1_LIRAssembler_x86.cpp	Tue Sep 11 14:59:23 2012 +0200
+++ b/src/cpu/x86/vm/c1_LIRAssembler_x86.cpp	Tue Sep 11 16:20:57 2012 +0200
@@ -950,6 +950,8 @@
     if (type == T_OBJECT || type == T_ARRAY) {
       __ verify_oop(src->as_register());
       __ movptr (dst, src->as_register());
+    } else if (type == T_METADATA) {
+      __ movptr (dst, src->as_register());
     } else {
       __ movl (dst, src->as_register());
     }
@@ -1041,6 +1043,14 @@
         __ movptr(as_Address(to_addr), src->as_register());
       }
       break;
+    case T_METADATA:
+      // We get here to store a method pointer to the stack to pass to
+      // a dtrace runtime call. This can't work on 64 bit with
+      // compressed klass ptrs: T_METADATA can be a compressed klass
+      // ptr or a 64 bit method pointer.
+      LP64_ONLY(ShouldNotReachHere());
+      __ movptr(as_Address(to_addr), src->as_register());
+      break;
     case T_ADDRESS:
       __ movptr(as_Address(to_addr), src->as_register());
       break;
@@ -1118,6 +1128,8 @@
     if (type == T_ARRAY || type == T_OBJECT) {
       __ movptr(dest->as_register(), frame_map()->address_for_slot(src->single_stack_ix()));
       __ verify_oop(dest->as_register());
+    } else if (type == T_METADATA) {
+      __ movptr(dest->as_register(), frame_map()->address_for_slot(src->single_stack_ix()));
     } else {
       __ movl(dest->as_register(), frame_map()->address_for_slot(src->single_stack_ix()));
     }
diff -r ec98e58952b2 -r 8a02ca5e5576 src/cpu/x86/vm/c1_LIRGenerator_x86.cpp
--- a/src/cpu/x86/vm/c1_LIRGenerator_x86.cpp	Tue Sep 11 14:59:23 2012 +0200
+++ b/src/cpu/x86/vm/c1_LIRGenerator_x86.cpp	Tue Sep 11 16:20:57 2012 +0200
@@ -1002,13 +1002,12 @@
 #endif
   CodeEmitInfo* info = state_for(x, x->state());
   LIR_Opr reg = result_register_for(x->type());
-  LIR_Opr klass_reg = new_register(objectType);
   new_instance(reg, x->klass(),
                        FrameMap::rcx_oop_opr,
                        FrameMap::rdi_oop_opr,
                        FrameMap::rsi_oop_opr,
                        LIR_OprFact::illegalOpr,
-                       FrameMap::rdx_oop_opr, info);
+                       FrameMap::rdx_metadata_opr, info);
   LIR_Opr result = rlock_result(x);
   __ move(reg, result);
 }
@@ -1025,11 +1024,11 @@
   LIR_Opr tmp2 = FrameMap::rsi_oop_opr;
   LIR_Opr tmp3 = FrameMap::rdi_oop_opr;
   LIR_Opr tmp4 = reg;
-  LIR_Opr klass_reg = FrameMap::rdx_oop_opr;
+  LIR_Opr klass_reg = FrameMap::rdx_metadata_opr;
   LIR_Opr len = length.result();
   BasicType elem_type = x->elt_type();
 
-  __ oop2reg(ciTypeArrayKlass::make(elem_type)->constant_encoding(), klass_reg);
+  __ metadata2reg(ciTypeArrayKlass::make(elem_type)->constant_encoding(), klass_reg);
 
   CodeStub* slow_path = new NewTypeArrayStub(klass_reg, len, reg, info);
   __ allocate_array(reg, len, tmp1, tmp2, tmp3, tmp4, elem_type, klass_reg, slow_path);
@@ -1055,7 +1054,7 @@
   LIR_Opr tmp2 = FrameMap::rsi_oop_opr;
   LIR_Opr tmp3 = FrameMap::rdi_oop_opr;
   LIR_Opr tmp4 = reg;
-  LIR_Opr klass_reg = FrameMap::rdx_oop_opr;
+  LIR_Opr klass_reg = FrameMap::rdx_metadata_opr;
 
   length.load_item_force(FrameMap::rbx_opr);
   LIR_Opr len = length.result();
@@ -1103,17 +1102,18 @@
     store_stack_parameter(size->result(), in_ByteSize(i*4));
   }
 
-  LIR_Opr reg = result_register_for(x->type());
-  klass2reg_with_patching(reg, x->klass(), patching_info);
+  LIR_Opr klass_reg = FrameMap::rax_metadata_opr;
+  klass2reg_with_patching(klass_reg, x->klass(), patching_info);
 
   LIR_Opr rank = FrameMap::rbx_opr;
   __ move(LIR_OprFact::intConst(x->rank()), rank);
   LIR_Opr varargs = FrameMap::rcx_opr;
   __ move(FrameMap::rsp_opr, varargs);
   LIR_OprList* args = new LIR_OprList(3);
-  args->append(reg);
+  args->append(klass_reg);
   args->append(rank);
   args->append(varargs);
+  LIR_Opr reg = result_register_for(x->type());
   __ call_runtime(Runtime1::entry_for(Runtime1::new_multi_array_id),
                   LIR_OprFact::illegalOpr,
                   reg, args, info);
diff -r ec98e58952b2 -r 8a02ca5e5576 src/cpu/x86/vm/sharedRuntime_x86_32.cpp
--- a/src/cpu/x86/vm/sharedRuntime_x86_32.cpp	Tue Sep 11 14:59:23 2012 +0200
+++ b/src/cpu/x86/vm/sharedRuntime_x86_32.cpp	Tue Sep 11 16:20:57 2012 +0200
@@ -938,6 +938,7 @@
     case T_OBJECT:
     case T_ARRAY:
     case T_ADDRESS:
+    case T_METADATA:
       regs[i].set1(VMRegImpl::stack2reg(stack++));
       break;
     case T_LONG:
diff -r ec98e58952b2 -r 8a02ca5e5576 src/cpu/x86/vm/sharedRuntime_x86_64.cpp
--- a/src/cpu/x86/vm/sharedRuntime_x86_64.cpp	Tue Sep 11 14:59:23 2012 +0200
+++ b/src/cpu/x86/vm/sharedRuntime_x86_64.cpp	Tue Sep 11 16:20:57 2012 +0200
@@ -903,6 +903,7 @@
       case T_OBJECT:
       case T_ARRAY:
       case T_ADDRESS:
+      case T_METADATA:
         if (int_args < Argument::n_int_register_parameters_c) {
           regs[i].set2(INT_ArgReg[int_args++]->as_VMReg());
 #ifdef _WIN64
diff -r ec98e58952b2 -r 8a02ca5e5576 src/share/vm/c1/c1_FrameMap.hpp
--- a/src/share/vm/c1/c1_FrameMap.hpp	Tue Sep 11 14:59:23 2012 +0200
+++ b/src/share/vm/c1/c1_FrameMap.hpp	Tue Sep 11 16:20:57 2012 +0200
@@ -194,6 +194,10 @@
     return LIR_OprFact::single_cpu_oop(cpu_reg2rnr(r));
   }
 
+  static LIR_Opr as_metadata_opr(Register r) {
+    return LIR_OprFact::single_cpu_metadata(cpu_reg2rnr(r));
+  }
+
   FrameMap(ciMethod* method, int monitors, int reserved_argument_area_size);
   bool finalize_frame(int nof_slots);
 
diff -r ec98e58952b2 -r 8a02ca5e5576 src/share/vm/c1/c1_LIR.cpp
--- a/src/share/vm/c1/c1_LIR.cpp	Tue Sep 11 14:59:23 2012 +0200
+++ b/src/share/vm/c1/c1_LIR.cpp	Tue Sep 11 16:20:57 2012 +0200
@@ -89,8 +89,12 @@
     ClassConstant* c = type->as_ClassConstant();
     if (c != NULL && !c->value()->is_loaded()) {
       return LIR_OprFact::metadataConst(NULL);
+    } else if (c != NULL) {
+      return LIR_OprFact::metadataConst(c->value()->constant_encoding());
     } else {
-      return LIR_OprFact::metadataConst(c->value()->constant_encoding());
+      MethodConstant* m = type->as_MethodConstant();
+      assert (m != NULL, "not a class or a method?");
+      return LIR_OprFact::metadataConst(m->value()->constant_encoding());
     }
   }
   case objectTag : {
@@ -1166,10 +1170,12 @@
 
 
 void LIR_List::oop2reg_patch(jobject o, LIR_Opr reg, CodeEmitInfo* info) {
+  assert(reg->type() == T_OBJECT, "bad reg");
   append(new LIR_Op1(lir_move, LIR_OprFact::oopConst(o),  reg, T_OBJECT, lir_patch_normal, info));
 }
 
 void LIR_List::klass2reg_patch(Metadata* o, LIR_Opr reg, CodeEmitInfo* info) {
+  assert(reg->type() == T_METADATA, "bad reg");
   append(new LIR_Op1(lir_move, LIR_OprFact::metadataConst(o), reg, T_METADATA, lir_patch_normal, info));
 }
 
diff -r ec98e58952b2 -r 8a02ca5e5576 src/share/vm/c1/c1_LIR.hpp
--- a/src/share/vm/c1/c1_LIR.hpp	Tue Sep 11 14:59:23 2012 +0200
+++ b/src/share/vm/c1/c1_LIR.hpp	Tue Sep 11 16:20:57 2012 +0200
@@ -299,6 +299,7 @@
     , address_type  = 4 << type_shift
     , float_type    = 5 << type_shift
     , double_type   = 6 << type_shift
+    , metadata_type = 7 << type_shift
   };
   friend OprType as_OprType(BasicType t);
   friend BasicType as_BasicType(OprType t);
@@ -322,6 +323,7 @@
       case T_ADDRESS:
       case T_OBJECT:
       case T_ARRAY:
+      case T_METADATA:
         return single_size;
         break;
 
@@ -474,6 +476,7 @@
   case T_OBJECT:
   case T_ARRAY:    return LIR_OprDesc::object_type;
   case T_ADDRESS:  return LIR_OprDesc::address_type;
+  case T_METADATA: return LIR_OprDesc::metadata_type;
   case T_ILLEGAL:  // fall through
   default: ShouldNotReachHere(); return LIR_OprDesc::unknown_type;
   }
@@ -487,6 +490,7 @@
   case LIR_OprDesc::double_type:  return T_DOUBLE;
   case LIR_OprDesc::object_type:  return T_OBJECT;
   case LIR_OprDesc::address_type: return T_ADDRESS;
+  case LIR_OprDesc::metadata_type:return T_METADATA;
   case LIR_OprDesc::unknown_type: // fall through
   default: ShouldNotReachHere();  return T_ILLEGAL;
   }
@@ -587,6 +591,12 @@
                                LIR_OprDesc::cpu_register         |
                                LIR_OprDesc::single_size);
   }
+  static LIR_Opr single_cpu_metadata(int reg) {
+    return (LIR_Opr)(intptr_t)((reg  << LIR_OprDesc::reg1_shift) |
+                               LIR_OprDesc::metadata_type        |
+                               LIR_OprDesc::cpu_register         |
+                               LIR_OprDesc::single_size);
+  }
   static LIR_Opr double_cpu(int reg1, int reg2) {
     LP64_ONLY(assert(reg1 == reg2, "must be identical"));
     return (LIR_Opr)(intptr_t)((reg1 << LIR_OprDesc::reg1_shift) |
@@ -660,6 +670,14 @@
                                             LIR_OprDesc::virtual_mask);
         break;
 
+      case T_METADATA:
+        res = (LIR_Opr)(intptr_t)((index << LIR_OprDesc::data_shift)  |
+                                            LIR_OprDesc::metadata_type|
+                                            LIR_OprDesc::cpu_register |
+                                            LIR_OprDesc::single_size  |
+                                            LIR_OprDesc::virtual_mask);
+        break;
+
       case T_INT:
         res = (LIR_Opr)(intptr_t)((index << LIR_OprDesc::data_shift) |
                                   LIR_OprDesc::int_type              |
@@ -757,6 +775,12 @@
                                   LIR_OprDesc::single_size);
         break;
 
+      case T_METADATA:
+        res = (LIR_Opr)(intptr_t)((index << LIR_OprDesc::data_shift) |
+                                  LIR_OprDesc::metadata_type         |
+                                  LIR_OprDesc::stack_value           |
+                                  LIR_OprDesc::single_size);
+        break;
       case T_INT:
         res = (LIR_Opr)(intptr_t)((index << LIR_OprDesc::data_shift) |
                                   LIR_OprDesc::int_type              |
@@ -2006,10 +2030,10 @@
   }
   void volatile_move(LIR_Opr src, LIR_Opr dst, BasicType type, CodeEmitInfo* info = NULL, LIR_PatchCode patch_code = lir_patch_none) { append(new LIR_Op1(lir_move, src, dst, type, patch_code, info, lir_move_volatile)); }
 
-  void oop2reg  (jobject o, LIR_Opr reg)         { append(new LIR_Op1(lir_move, LIR_OprFact::oopConst(o),    reg));   }
+  void oop2reg  (jobject o, LIR_Opr reg)         { assert(reg->type() == T_OBJECT, "bad reg"); append(new LIR_Op1(lir_move, LIR_OprFact::oopConst(o),    reg));   }
   void oop2reg_patch(jobject o, LIR_Opr reg, CodeEmitInfo* info);
 
-  void oop2reg  (Metadata* o, LIR_Opr reg)       { append(new LIR_Op1(lir_move, LIR_OprFact::metadataConst(o), reg));   }
+  void metadata2reg  (Metadata* o, LIR_Opr reg)  { assert(reg->type() == T_METADATA, "bad reg"); append(new LIR_Op1(lir_move, LIR_OprFact::metadataConst(o), reg));   }
   void klass2reg_patch(Metadata* o, LIR_Opr reg, CodeEmitInfo* info);
 
   void return_op(LIR_Opr result)                 { append(new LIR_Op1(lir_return, result)); }
diff -r ec98e58952b2 -r 8a02ca5e5576 src/share/vm/c1/c1_LIRGenerator.cpp
--- a/src/share/vm/c1/c1_LIRGenerator.cpp	Tue Sep 11 14:59:23 2012 +0200
+++ b/src/share/vm/c1/c1_LIRGenerator.cpp	Tue Sep 11 16:20:57 2012 +0200
@@ -467,7 +467,7 @@
     __ klass2reg_patch(NULL, r, info);
   } else {
     // no patching needed
-    __ oop2reg(obj->constant_encoding(), r);
+    __ metadata2reg(obj->constant_encoding(), r);
   }
 }
 
@@ -955,8 +955,8 @@
       not_taken_count_offset = t;
     }
 
-    LIR_Opr md_reg = new_register(T_OBJECT);
-    __ oop2reg(md->constant_encoding(), md_reg);
+    LIR_Opr md_reg = new_register(T_METADATA);
+    __ metadata2reg(md->constant_encoding(), md_reg);
 
     LIR_Opr data_offset_reg = new_pointer_register();
     __ cmove(lir_cond(cond),
@@ -1192,8 +1192,8 @@
     signature.append(T_OBJECT); // Method*
     LIR_OprList* args = new LIR_OprList();
     args->append(getThreadPointer());
-    LIR_Opr meth = new_register(T_OBJECT);
-    __ oop2reg(method()->constant_encoding(), meth);
+    LIR_Opr meth = new_register(T_METADATA);
+    __ metadata2reg(method()->constant_encoding(), meth);
     args->append(meth);
     call_runtime(&signature, args, CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit), voidType, NULL);
   }
@@ -2553,8 +2553,8 @@
       assert(data->is_JumpData(), "need JumpData for branches");
       offset = md->byte_offset_of_slot(data, JumpData::taken_offset());
     }
-    LIR_Opr md_reg = new_register(T_OBJECT);
-    __ oop2reg(md->constant_encoding(), md_reg);
+    LIR_Opr md_reg = new_register(T_METADATA);
+    __ metadata2reg(md->constant_encoding(), md_reg);
 
     increment_counter(new LIR_Address(md_reg, offset,
                                       NOT_LP64(T_INT) LP64_ONLY(T_LONG)), DataLayout::counter_increment);
@@ -2611,8 +2611,8 @@
     signature.append(T_OBJECT); // Method*
     LIR_OprList* args = new LIR_OprList();
     args->append(getThreadPointer());
-    LIR_Opr meth = new_register(T_OBJECT);
-    __ oop2reg(method()->constant_encoding(), meth);
+    LIR_Opr meth = new_register(T_METADATA);
+    __ metadata2reg(method()->constant_encoding(), meth);
     args->append(meth);
     call_runtime(&signature, args, CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry), voidType, NULL);
   }
@@ -3032,21 +3032,21 @@
   assert(level > CompLevel_simple, "Shouldn't be here");
 
   int offset = -1;
-  LIR_Opr counter_holder = new_register(T_OBJECT);
+  LIR_Opr counter_holder = new_register(T_METADATA);
   LIR_Opr meth;
   if (level == CompLevel_limited_profile) {
     offset = in_bytes(backedge ? Method::backedge_counter_offset() :
                                  Method::invocation_counter_offset());
-    __ oop2reg(method->constant_encoding(), counter_holder);
+    __ metadata2reg(method->constant_encoding(), counter_holder);
     meth = counter_holder;
   } else if (level == CompLevel_full_profile) {
     offset = in_bytes(backedge ? MethodData::backedge_counter_offset() :
                                  MethodData::invocation_counter_offset());
     ciMethodData* md = method->method_data_or_null();
     assert(md != NULL, "Sanity");
-    __ oop2reg(md->constant_encoding(), counter_holder);
-    meth = new_register(T_OBJECT);
-    __ oop2reg(method->constant_encoding(), meth);
+    __ metadata2reg(md->constant_encoding(), counter_holder);
+    meth = new_register(T_METADATA);
+    __ metadata2reg(method->constant_encoding(), meth);
   } else {
     ShouldNotReachHere();
   }
diff -r ec98e58952b2 -r 8a02ca5e5576 src/share/vm/c1/c1_LinearScan.cpp
--- a/src/share/vm/c1/c1_LinearScan.cpp	Tue Sep 11 14:59:23 2012 +0200
+++ b/src/share/vm/c1/c1_LinearScan.cpp	Tue Sep 11 16:20:57 2012 +0200
@@ -2067,6 +2067,12 @@
         return LIR_OprFact::single_cpu_address(assigned_reg);
       }
 
+      case T_METADATA: {
+        assert(assigned_reg >= pd_first_cpu_reg && assigned_reg <= pd_last_cpu_reg, "no cpu register");
+        assert(interval->assigned_regHi() == any_reg, "must not have hi register");
+        return LIR_OprFact::single_cpu_metadata(assigned_reg);
+      }
+
 #ifdef __SOFTFP__
       case T_FLOAT:  // fall through
 #endif // __SOFTFP__
diff -r ec98e58952b2 -r 8a02ca5e5576 src/share/vm/c1/c1_ValueType.cpp
--- a/src/share/vm/c1/c1_ValueType.cpp	Tue Sep 11 14:59:23 2012 +0200
+++ b/src/share/vm/c1/c1_ValueType.cpp	Tue Sep 11 16:20:57 2012 +0200
@@ -168,6 +168,7 @@
     case floatTag:   return T_FLOAT;
     case doubleTag:  return T_DOUBLE;
     case objectTag:  return T_OBJECT;
+    case metaDataTag:return T_METADATA;
     case addressTag: return T_ADDRESS;
     case illegalTag: return T_ILLEGAL;
   }
diff -r ec98e58952b2 -r 8a02ca5e5576 src/share/vm/opto/runtime.cpp
--- a/src/share/vm/opto/runtime.cpp	Tue Sep 11 14:59:23 2012 +0200
+++ b/src/share/vm/opto/runtime.cpp	Tue Sep 11 16:20:57 2012 +0200
@@ -1148,7 +1148,7 @@
   // create input type (domain)
   const Type **fields = TypeTuple::fields(2);
   fields[TypeFunc::Parms+0] = TypeRawPtr::BOTTOM; // Thread-local storage
-  fields[TypeFunc::Parms+1] = TypeInstPtr::NOTNULL;  // Method*;    Method we are entering
+  fields[TypeFunc::Parms+1] = TypeMetadataPtr::BOTTOM;  // Method*;    Method we are entering
   const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+2,fields);
 
   // create result type (range)
diff -r ec98e58952b2 -r 8a02ca5e5576 src/share/vm/utilities/globalDefinitions.cpp
--- a/src/share/vm/utilities/globalDefinitions.cpp	Tue Sep 11 14:59:23 2012 +0200
+++ b/src/share/vm/utilities/globalDefinitions.cpp	Tue Sep 11 16:20:57 2012 +0200
@@ -213,7 +213,7 @@
 
 
 // Map BasicType to size in words
-int type2size[T_CONFLICT+1]={ -1, 0, 0, 0, 1, 1, 1, 2, 1, 1, 1, 2, 1, 1, 0, 1, 1, -1};
+int type2size[T_CONFLICT+1]={ -1, 0, 0, 0, 1, 1, 1, 2, 1, 1, 1, 2, 1, 1, 0, 1, 1, 1, -1};
 
 BasicType type2field[T_CONFLICT+1] = {
   (BasicType)0,            // 0,