# HG changeset patch
# User twisti
# Date 1274435964 25200
# Node ID b862d1f189bd012c0c20878e834461f95fa038a5
# Parent  5435e77aa3df806763d0c5605c06da99f32fe23e
6930772: JSR 292 needs to support SPARC C1
Summary: C1 for SPARC needs to support JSR 292.
Reviewed-by: never, jrose

diff -r 5435e77aa3df -r b862d1f189bd hotspot/src/cpu/sparc/vm/assembler_sparc.hpp
--- a/hotspot/src/cpu/sparc/vm/assembler_sparc.hpp	Thu May 20 06:34:23 2010 -0700
+++ b/hotspot/src/cpu/sparc/vm/assembler_sparc.hpp	Fri May 21 02:59:24 2010 -0700
@@ -87,6 +87,7 @@
 // JSR 292 fixed register usages:
 REGISTER_DECLARATION(Register, G5_method_type        , G5);
 REGISTER_DECLARATION(Register, G3_method_handle      , G3);
+REGISTER_DECLARATION(Register, L7_mh_SP_save         , L7);
 
 // The compiler requires that G5_megamorphic_method is G5_inline_cache_klass,
 // because a single patchable "set" instruction (NativeMovConstReg,
diff -r 5435e77aa3df -r b862d1f189bd hotspot/src/cpu/sparc/vm/c1_FrameMap_sparc.cpp
--- a/hotspot/src/cpu/sparc/vm/c1_FrameMap_sparc.cpp	Thu May 20 06:34:23 2010 -0700
+++ b/hotspot/src/cpu/sparc/vm/c1_FrameMap_sparc.cpp	Fri May 21 02:59:24 2010 -0700
@@ -1,5 +1,5 @@
 /*
- * Copyright 1999-2009 Sun Microsystems, Inc.  All Rights Reserved.
+ * Copyright 1999-2010 Sun Microsystems, Inc.  All Rights Reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -345,6 +345,13 @@
 }
 
 
+// JSR 292
+LIR_Opr FrameMap::method_handle_invoke_SP_save_opr() {
+  assert(L7 == L7_mh_SP_save, "must be same register");
+  return L7_opr;
+}
+
+
 bool FrameMap::validate_frame() {
   int max_offset = in_bytes(framesize_in_bytes());
   int java_index = 0;
diff -r 5435e77aa3df -r b862d1f189bd hotspot/src/cpu/sparc/vm/c1_FrameMap_sparc.hpp
--- a/hotspot/src/cpu/sparc/vm/c1_FrameMap_sparc.hpp	Thu May 20 06:34:23 2010 -0700
+++ b/hotspot/src/cpu/sparc/vm/c1_FrameMap_sparc.hpp	Fri May 21 02:59:24 2010 -0700
@@ -143,6 +143,3 @@
 
   static bool is_caller_save_register (LIR_Opr  reg);
   static bool is_caller_save_register (Register r);
-
-  // JSR 292
-  static LIR_Opr& method_handle_invoke_SP_save_opr() { return L7_opr; }
diff -r 5435e77aa3df -r b862d1f189bd hotspot/src/cpu/sparc/vm/c1_LIRAssembler_sparc.cpp
--- a/hotspot/src/cpu/sparc/vm/c1_LIRAssembler_sparc.cpp	Thu May 20 06:34:23 2010 -0700
+++ b/hotspot/src/cpu/sparc/vm/c1_LIRAssembler_sparc.cpp	Fri May 21 02:59:24 2010 -0700
@@ -736,7 +736,8 @@
 
 void LIR_Assembler::call(LIR_OpJavaCall* op, relocInfo::relocType rtype) {
   __ call(op->addr(), rtype);
-  // the peephole pass fills the delay slot
+  // The peephole pass fills the delay slot, add_call_info is done in
+  // LIR_Assembler::emit_delay.
 }
 
 
@@ -745,7 +746,8 @@
   __ set_oop((jobject)Universe::non_oop_word(), G5_inline_cache_reg);
   __ relocate(rspec);
   __ call(op->addr(), relocInfo::none);
-  // the peephole pass fills the delay slot
+  // The peephole pass fills the delay slot, add_call_info is done in
+  // LIR_Assembler::emit_delay.
 }
 
 
@@ -766,16 +768,6 @@
 }
 
 
-void LIR_Assembler::preserve_SP(LIR_OpJavaCall* op) {
-  Unimplemented();
-}
-
-
-void LIR_Assembler::restore_SP(LIR_OpJavaCall* op) {
-  Unimplemented();
-}
-
-
 // load with 32-bit displacement
 int LIR_Assembler::load(Register s, int disp, Register d, BasicType ld_type, CodeEmitInfo *info) {
   int load_offset = code_offset();
@@ -2934,7 +2926,7 @@
 
   // we may also be emitting the call info for the instruction
   // which we are the delay slot of.
-  CodeEmitInfo * call_info = op->call_info();
+  CodeEmitInfo* call_info = op->call_info();
   if (call_info) {
     add_call_info(code_offset(), call_info);
   }
@@ -3159,6 +3151,7 @@
               tty->print_cr("delayed");
               inst->at(i - 1)->print();
               inst->at(i)->print();
+              tty->cr();
             }
 #endif
             continue;
@@ -3174,8 +3167,8 @@
       case lir_static_call:
       case lir_virtual_call:
       case lir_icvirtual_call:
-      case lir_optvirtual_call: {
-        LIR_Op* delay_op = NULL;
+      case lir_optvirtual_call:
+      case lir_dynamic_call: {
         LIR_Op* prev = inst->at(i - 1);
         if (LIRFillDelaySlots && prev && prev->code() == lir_move && prev->info() == NULL &&
             (op->code() != lir_virtual_call ||
@@ -3192,15 +3185,14 @@
             tty->print_cr("delayed");
             inst->at(i - 1)->print();
             inst->at(i)->print();
+            tty->cr();
           }
 #endif
           continue;
         }
 
-        if (!delay_op) {
-          delay_op = new LIR_OpDelay(new LIR_Op0(lir_nop), op->as_OpJavaCall()->info());
-          inst->insert_before(i + 1, delay_op);
-        }
+        LIR_Op* delay_op = new LIR_OpDelay(new LIR_Op0(lir_nop), op->as_OpJavaCall()->info());
+        inst->insert_before(i + 1, delay_op);
         break;
       }
     }
diff -r 5435e77aa3df -r b862d1f189bd hotspot/src/cpu/sparc/vm/c1_Runtime1_sparc.cpp
--- a/hotspot/src/cpu/sparc/vm/c1_Runtime1_sparc.cpp	Thu May 20 06:34:23 2010 -0700
+++ b/hotspot/src/cpu/sparc/vm/c1_Runtime1_sparc.cpp	Fri May 21 02:59:24 2010 -0700
@@ -679,8 +679,15 @@
         __ call_VM_leaf(L7_thread_cache, CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address),
                         G2_thread, Oissuing_pc->after_save());
         __ verify_not_null_oop(Oexception->after_save());
-        __ jmp(O0, 0);
-        __ delayed()->restore();
+
+        // Restore SP from L7 if the exception PC is a MethodHandle call site.
+        __ mov(O0, G5);  // Save the target address.
+        __ lduw(Address(G2_thread, JavaThread::is_method_handle_return_offset()), L0);
+        __ tst(L0);  // Condition codes are preserved over the restore.
+        __ restore();
+
+        __ jmp(G5, 0);
+        __ delayed()->movcc(Assembler::notZero, false, Assembler::icc, L7_mh_SP_save, SP);  // Restore SP if required.
       }
       break;
 
diff -r 5435e77aa3df -r b862d1f189bd hotspot/src/cpu/sparc/vm/frame_sparc.cpp
--- a/hotspot/src/cpu/sparc/vm/frame_sparc.cpp	Thu May 20 06:34:23 2010 -0700
+++ b/hotspot/src/cpu/sparc/vm/frame_sparc.cpp	Fri May 21 02:59:24 2010 -0700
@@ -336,9 +336,11 @@
 #endif // ASSERT
 }
 
-frame::frame(intptr_t* sp, intptr_t* younger_sp, bool younger_frame_adjusted_stack) {
-  _sp = sp;
-  _younger_sp = younger_sp;
+frame::frame(intptr_t* sp, intptr_t* younger_sp, bool younger_frame_is_interpreted) :
+  _sp(sp),
+  _younger_sp(younger_sp),
+  _deopt_state(unknown),
+  _sp_adjustment_by_callee(0) {
   if (younger_sp == NULL) {
     // make a deficient frame which doesn't know where its PC is
     _pc = NULL;
@@ -352,20 +354,32 @@
     // wrong.  (the _last_native_pc will have the right value)
     // So do not put add any asserts on the _pc here.
   }
-  if (younger_frame_adjusted_stack) {
-    // compute adjustment to this frame's SP made by its interpreted callee
-    _sp_adjustment_by_callee = (intptr_t*)((intptr_t)younger_sp[I5_savedSP->sp_offset_in_saved_window()] +
-                                             STACK_BIAS) - sp;
-  } else {
-    _sp_adjustment_by_callee = 0;
+
+  if (_pc != NULL)
+    _cb = CodeCache::find_blob(_pc);
+
+  // Check for MethodHandle call sites.
+  if (_cb != NULL) {
+    nmethod* nm = _cb->as_nmethod_or_null();
+    if (nm != NULL) {
+      if (nm->is_deopt_mh_entry(_pc) || nm->is_method_handle_return(_pc)) {
+        _sp_adjustment_by_callee = (intptr_t*) ((intptr_t) sp[L7_mh_SP_save->sp_offset_in_saved_window()] + STACK_BIAS) - sp;
+        // The SP is already adjusted by this MH call site, don't
+        // overwrite this value with the wrong interpreter value.
+        younger_frame_is_interpreted = false;
+      }
+    }
   }
 
-  _deopt_state = unknown;
+  if (younger_frame_is_interpreted) {
+    // compute adjustment to this frame's SP made by its interpreted callee
+    _sp_adjustment_by_callee = (intptr_t*) ((intptr_t) younger_sp[I5_savedSP->sp_offset_in_saved_window()] + STACK_BIAS) - sp;
+  }
 
-  // It is important that frame be fully construct when we do this lookup
-  // as get_original_pc() needs correct value for unextended_sp()
+  // It is important that the frame is fully constructed when we do
+  // this lookup as get_deopt_original_pc() needs a correct value for
+  // unextended_sp() which uses _sp_adjustment_by_callee.
   if (_pc != NULL) {
-    _cb = CodeCache::find_blob(_pc);
     address original_pc = nmethod::get_deopt_original_pc(this);
     if (original_pc != NULL) {
       _pc = original_pc;
@@ -462,9 +476,8 @@
 
   if (is_entry_frame()) return sender_for_entry_frame(map);
 
-  intptr_t* younger_sp     = sp();
-  intptr_t* sp             = sender_sp();
-  bool      adjusted_stack = false;
+  intptr_t* younger_sp = sp();
+  intptr_t* sp         = sender_sp();
 
   // Note:  The version of this operation on any platform with callee-save
   //        registers must update the register map (if not null).
@@ -483,8 +496,8 @@
   // interpreted but its pc is in the code cache (for c1 -> osr_frame_return_id stub), so it must be
   // explicitly recognized.
 
-  adjusted_stack = is_interpreted_frame();
-  if (adjusted_stack) {
+  bool frame_is_interpreted = is_interpreted_frame();
+  if (frame_is_interpreted) {
     map->make_integer_regs_unsaved();
     map->shift_window(sp, younger_sp);
   } else if (_cb != NULL) {
@@ -503,7 +516,7 @@
       }
     }
   }
-  return frame(sp, younger_sp, adjusted_stack);
+  return frame(sp, younger_sp, frame_is_interpreted);
 }
 
 
diff -r 5435e77aa3df -r b862d1f189bd hotspot/src/cpu/sparc/vm/methodHandles_sparc.cpp
--- a/hotspot/src/cpu/sparc/vm/methodHandles_sparc.cpp	Thu May 20 06:34:23 2010 -0700
+++ b/hotspot/src/cpu/sparc/vm/methodHandles_sparc.cpp	Fri May 21 02:59:24 2010 -0700
@@ -375,10 +375,10 @@
       Register O0_scratch = O0_argslot;
       int stackElementSize = Interpreter::stackElementSize;
 
-      // Make space on the stack for the arguments.
-      __ sub(SP,    4*stackElementSize, SP);
-      __ sub(Gargs, 3*stackElementSize, Gargs);
-      //__ sub(Lesp,  3*stackElementSize, Lesp);
+      // Make space on the stack for the arguments and set Gargs
+      // correctly.
+      __ sub(SP, 4*stackElementSize, SP);  // Keep stack aligned.
+      __ add(SP, (frame::varargs_offset)*wordSize - 1*Interpreter::stackElementSize + STACK_BIAS + BytesPerWord, Gargs);
 
       // void raiseException(int code, Object actual, Object required)
       __ st(    O1_scratch, Address(Gargs, 2*stackElementSize));  // code
diff -r 5435e77aa3df -r b862d1f189bd hotspot/src/cpu/sparc/vm/register_definitions_sparc.cpp
--- a/hotspot/src/cpu/sparc/vm/register_definitions_sparc.cpp	Thu May 20 06:34:23 2010 -0700
+++ b/hotspot/src/cpu/sparc/vm/register_definitions_sparc.cpp	Fri May 21 02:59:24 2010 -0700
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2009 Sun Microsystems, Inc.  All Rights Reserved.
+ * Copyright 2002-2010 Sun Microsystems, Inc.  All Rights Reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -142,9 +142,12 @@
 REGISTER_DEFINITION(Register, G3_scratch);
 REGISTER_DEFINITION(Register, G4_scratch);
 REGISTER_DEFINITION(Register, Gtemp);
+REGISTER_DEFINITION(Register, Lentry_args);
+
+// JSR 292
 REGISTER_DEFINITION(Register, G5_method_type);
 REGISTER_DEFINITION(Register, G3_method_handle);
-REGISTER_DEFINITION(Register, Lentry_args);
+REGISTER_DEFINITION(Register, L7_mh_SP_save);
 
 #ifdef CC_INTERP
 REGISTER_DEFINITION(Register, Lstate);
diff -r 5435e77aa3df -r b862d1f189bd hotspot/src/cpu/sparc/vm/sharedRuntime_sparc.cpp
--- a/hotspot/src/cpu/sparc/vm/sharedRuntime_sparc.cpp	Thu May 20 06:34:23 2010 -0700
+++ b/hotspot/src/cpu/sparc/vm/sharedRuntime_sparc.cpp	Fri May 21 02:59:24 2010 -0700
@@ -908,26 +908,13 @@
   // O0-O5          - Outgoing args in compiled layout
   // O6             - Adjusted or restored SP
   // O7             - Valid return address
-  // L0-L7, I0-I7    - Caller's temps (no frame pushed yet)
+  // L0-L7, I0-I7   - Caller's temps (no frame pushed yet)
   // F0-F7          - more outgoing args
 
 
   // Gargs is the incoming argument base, and also an outgoing argument.
   __ sub(Gargs, BytesPerWord, Gargs);
 
-#ifdef ASSERT
-  {
-    // on entry OsavedSP and SP should be equal
-    Label ok;
-    __ cmp(O5_savedSP, SP);
-    __ br(Assembler::equal, false, Assembler::pt, ok);
-    __ delayed()->nop();
-    __ stop("I5_savedSP not set");
-    __ should_not_reach_here();
-    __ bind(ok);
-  }
-#endif
-
   // ON ENTRY TO THE CODE WE ARE MAKING, WE HAVE AN INTERPRETED FRAME
   // WITH O7 HOLDING A VALID RETURN PC
   //
diff -r 5435e77aa3df -r b862d1f189bd hotspot/src/cpu/sparc/vm/stubGenerator_sparc.cpp
--- a/hotspot/src/cpu/sparc/vm/stubGenerator_sparc.cpp	Thu May 20 06:34:23 2010 -0700
+++ b/hotspot/src/cpu/sparc/vm/stubGenerator_sparc.cpp	Fri May 21 02:59:24 2010 -0700
@@ -2911,16 +2911,6 @@
     // arraycopy stubs used by compilers
     generate_arraycopy_stubs();
 
-    // generic method handle stubs
-    if (EnableMethodHandles && SystemDictionary::MethodHandle_klass() != NULL) {
-      for (MethodHandles::EntryKind ek = MethodHandles::_EK_FIRST;
-           ek < MethodHandles::_EK_LIMIT;
-           ek = MethodHandles::EntryKind(1 + (int)ek)) {
-        StubCodeMark mark(this, "MethodHandle", MethodHandles::entry_name(ek));
-        MethodHandles::generate_method_handle_stub(_masm, ek);
-      }
-    }
-
     // Don't initialize the platform math functions since sparc
     // doesn't have intrinsics for these operations.
   }
diff -r 5435e77aa3df -r b862d1f189bd hotspot/src/cpu/sparc/vm/stubRoutines_sparc.hpp
--- a/hotspot/src/cpu/sparc/vm/stubRoutines_sparc.hpp	Thu May 20 06:34:23 2010 -0700
+++ b/hotspot/src/cpu/sparc/vm/stubRoutines_sparc.hpp	Fri May 21 02:59:24 2010 -0700
@@ -43,7 +43,7 @@
 
 // MethodHandles adapters
 enum method_handles_platform_dependent_constants {
-  method_handles_adapters_code_size = 5000
+  method_handles_adapters_code_size = 6000
 };
 
 class Sparc {
diff -r 5435e77aa3df -r b862d1f189bd hotspot/src/cpu/x86/vm/assembler_x86.hpp
--- a/hotspot/src/cpu/x86/vm/assembler_x86.hpp	Thu May 20 06:34:23 2010 -0700
+++ b/hotspot/src/cpu/x86/vm/assembler_x86.hpp	Fri May 21 02:59:24 2010 -0700
@@ -135,6 +135,9 @@
 
 #endif // _LP64
 
+// JSR 292 fixed register usages:
+REGISTER_DECLARATION(Register, rbp_mh_SP_save, rbp);
+
 // Address is an abstraction used to represent a memory location
 // using any of the amd64 addressing modes with one object.
 //
diff -r 5435e77aa3df -r b862d1f189bd hotspot/src/cpu/x86/vm/c1_FrameMap_x86.cpp
--- a/hotspot/src/cpu/x86/vm/c1_FrameMap_x86.cpp	Thu May 20 06:34:23 2010 -0700
+++ b/hotspot/src/cpu/x86/vm/c1_FrameMap_x86.cpp	Fri May 21 02:59:24 2010 -0700
@@ -1,5 +1,5 @@
 /*
- * Copyright 1999-2008 Sun Microsystems, Inc.  All Rights Reserved.
+ * Copyright 1999-2010 Sun Microsystems, Inc.  All Rights Reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -309,6 +309,13 @@
 }
 
 
+// JSR 292
+LIR_Opr FrameMap::method_handle_invoke_SP_save_opr() {
+  assert(rbp == rbp_mh_SP_save, "must be same register");
+  return rbp_opr;
+}
+
+
 bool FrameMap::validate_frame() {
   return true;
 }
diff -r 5435e77aa3df -r b862d1f189bd hotspot/src/cpu/x86/vm/c1_FrameMap_x86.hpp
--- a/hotspot/src/cpu/x86/vm/c1_FrameMap_x86.hpp	Thu May 20 06:34:23 2010 -0700
+++ b/hotspot/src/cpu/x86/vm/c1_FrameMap_x86.hpp	Fri May 21 02:59:24 2010 -0700
@@ -126,6 +126,3 @@
     assert(i >= 0 && i < nof_caller_save_xmm_regs, "out of bounds");
     return _caller_save_xmm_regs[i];
   }
-
-  // JSR 292
-  static LIR_Opr& method_handle_invoke_SP_save_opr() { return rbp_opr; }
diff -r 5435e77aa3df -r b862d1f189bd hotspot/src/cpu/x86/vm/c1_LIRAssembler_x86.cpp
--- a/hotspot/src/cpu/x86/vm/c1_LIRAssembler_x86.cpp	Thu May 20 06:34:23 2010 -0700
+++ b/hotspot/src/cpu/x86/vm/c1_LIRAssembler_x86.cpp	Fri May 21 02:59:24 2010 -0700
@@ -2784,7 +2784,7 @@
   assert(!os::is_MP() || (__ offset() + NativeCall::displacement_offset) % BytesPerWord == 0,
          "must be aligned");
   __ call(AddressLiteral(op->addr(), rtype));
-  add_call_info(code_offset(), op->info(), op->is_method_handle_invoke());
+  add_call_info(code_offset(), op->info());
 }
 
 
@@ -2795,7 +2795,7 @@
          (__ offset() + NativeCall::displacement_offset) % BytesPerWord == 0,
          "must be aligned");
   __ call(AddressLiteral(op->addr(), rh));
-  add_call_info(code_offset(), op->info(), op->is_method_handle_invoke());
+  add_call_info(code_offset(), op->info());
 }
 
 
@@ -2805,16 +2805,6 @@
 }
 
 
-void LIR_Assembler::preserve_SP(LIR_OpJavaCall* op) {
-  __ movptr(FrameMap::method_handle_invoke_SP_save_opr()->as_register(), rsp);
-}
-
-
-void LIR_Assembler::restore_SP(LIR_OpJavaCall* op) {
-  __ movptr(rsp, FrameMap::method_handle_invoke_SP_save_opr()->as_register());
-}
-
-
 void LIR_Assembler::emit_static_call_stub() {
   address call_pc = __ pc();
   address stub = __ start_a_stub(call_stub_size);
diff -r 5435e77aa3df -r b862d1f189bd hotspot/src/cpu/x86/vm/c1_Runtime1_x86.cpp
--- a/hotspot/src/cpu/x86/vm/c1_Runtime1_x86.cpp	Thu May 20 06:34:23 2010 -0700
+++ b/hotspot/src/cpu/x86/vm/c1_Runtime1_x86.cpp	Fri May 21 02:59:24 2010 -0700
@@ -782,7 +782,7 @@
   // Restore SP from BP if the exception PC is a MethodHandle call site.
   NOT_LP64(__ get_thread(thread);)
   __ cmpl(Address(thread, JavaThread::is_method_handle_return_offset()), 0);
-  __ cmovptr(Assembler::notEqual, rsp, rbp);
+  __ cmovptr(Assembler::notEqual, rsp, rbp_mh_SP_save);
 
   // continue at exception handler (return address removed)
   // note: do *not* remove arguments when unwinding the
diff -r 5435e77aa3df -r b862d1f189bd hotspot/src/cpu/x86/vm/register_definitions_x86.cpp
--- a/hotspot/src/cpu/x86/vm/register_definitions_x86.cpp	Thu May 20 06:34:23 2010 -0700
+++ b/hotspot/src/cpu/x86/vm/register_definitions_x86.cpp	Fri May 21 02:59:24 2010 -0700
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2008 Sun Microsystems, Inc.  All Rights Reserved.
+ * Copyright 2002-2010 Sun Microsystems, Inc.  All Rights Reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -115,3 +115,6 @@
 REGISTER_DEFINITION(MMXRegister, mmx5 );
 REGISTER_DEFINITION(MMXRegister, mmx6 );
 REGISTER_DEFINITION(MMXRegister, mmx7 );
+
+// JSR 292
+REGISTER_DEFINITION(Register, rbp_mh_SP_save);
diff -r 5435e77aa3df -r b862d1f189bd hotspot/src/share/vm/c1/c1_FrameMap.hpp
--- a/hotspot/src/share/vm/c1/c1_FrameMap.hpp	Thu May 20 06:34:23 2010 -0700
+++ b/hotspot/src/share/vm/c1/c1_FrameMap.hpp	Fri May 21 02:59:24 2010 -0700
@@ -1,5 +1,5 @@
 /*
- * Copyright 2000-2006 Sun Microsystems, Inc.  All Rights Reserved.
+ * Copyright 2000-2010 Sun Microsystems, Inc.  All Rights Reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -150,6 +150,9 @@
   // Opr representing the stack_pointer on this platform
   static LIR_Opr stack_pointer();
 
+  // JSR 292
+  static LIR_Opr method_handle_invoke_SP_save_opr();
+
   static BasicTypeArray*     signature_type_array_for(const ciMethod* method);
   static BasicTypeArray*     signature_type_array_for(const char * signature);
 
diff -r 5435e77aa3df -r b862d1f189bd hotspot/src/share/vm/c1/c1_IR.cpp
--- a/hotspot/src/share/vm/c1/c1_IR.cpp	Thu May 20 06:34:23 2010 -0700
+++ b/hotspot/src/share/vm/c1/c1_IR.cpp	Fri May 21 02:59:24 2010 -0700
@@ -230,7 +230,8 @@
   , _stack(stack)
   , _exception_handlers(exception_handlers)
   , _next(NULL)
-  , _id(-1) {
+  , _id(-1)
+  , _is_method_handle_invoke(false) {
   assert(_stack != NULL, "must be non null");
   assert(_bci == SynchronizationEntryBCI || Bytecodes::is_defined(scope()->method()->java_code_at_bci(_bci)), "make sure bci points at a real bytecode");
 }
@@ -241,7 +242,8 @@
   , _exception_handlers(NULL)
   , _bci(info->_bci)
   , _scope_debug_info(NULL)
-  , _oop_map(NULL) {
+  , _oop_map(NULL)
+  , _is_method_handle_invoke(info->_is_method_handle_invoke) {
   if (lock_stack_only) {
     if (info->_stack != NULL) {
       _stack = info->_stack->copy_locks();
@@ -259,10 +261,10 @@
 }
 
 
-void CodeEmitInfo::record_debug_info(DebugInformationRecorder* recorder, int pc_offset, bool is_method_handle_invoke) {
+void CodeEmitInfo::record_debug_info(DebugInformationRecorder* recorder, int pc_offset) {
   // record the safepoint before recording the debug info for enclosing scopes
   recorder->add_safepoint(pc_offset, _oop_map->deep_copy());
-  _scope_debug_info->record_debug_info(recorder, pc_offset, true/*topmost*/, is_method_handle_invoke);
+  _scope_debug_info->record_debug_info(recorder, pc_offset, true/*topmost*/, _is_method_handle_invoke);
   recorder->end_safepoint(pc_offset);
 }
 
diff -r 5435e77aa3df -r b862d1f189bd hotspot/src/share/vm/c1/c1_IR.hpp
--- a/hotspot/src/share/vm/c1/c1_IR.hpp	Thu May 20 06:34:23 2010 -0700
+++ b/hotspot/src/share/vm/c1/c1_IR.hpp	Fri May 21 02:59:24 2010 -0700
@@ -269,6 +269,7 @@
   int               _bci;
   CodeEmitInfo*     _next;
   int               _id;
+  bool              _is_method_handle_invoke;    // true if the associated call site is a MethodHandle call site.
 
   FrameMap*     frame_map() const                { return scope()->compilation()->frame_map(); }
   Compilation*  compilation() const              { return scope()->compilation(); }
@@ -287,7 +288,8 @@
     , _stack(NULL)
     , _exception_handlers(NULL)
     , _next(NULL)
-    , _id(-1) {
+    , _id(-1)
+    , _is_method_handle_invoke(false) {
   }
 
   // make a copy
@@ -302,13 +304,16 @@
   int bci() const                                { return _bci; }
 
   void add_register_oop(LIR_Opr opr);
-  void record_debug_info(DebugInformationRecorder* recorder, int pc_offset, bool is_method_handle_invoke = false);
+  void record_debug_info(DebugInformationRecorder* recorder, int pc_offset);
 
   CodeEmitInfo* next() const        { return _next; }
   void set_next(CodeEmitInfo* next) { _next = next; }
 
   int id() const      { return _id; }
   void set_id(int id) { _id = id; }
+
+  bool     is_method_handle_invoke() const { return _is_method_handle_invoke;     }
+  void set_is_method_handle_invoke(bool x) {        _is_method_handle_invoke = x; }
 };
 
 
diff -r 5435e77aa3df -r b862d1f189bd hotspot/src/share/vm/c1/c1_LIR.cpp
--- a/hotspot/src/share/vm/c1/c1_LIR.cpp	Thu May 20 06:34:23 2010 -0700
+++ b/hotspot/src/share/vm/c1/c1_LIR.cpp	Fri May 21 02:59:24 2010 -0700
@@ -715,7 +715,10 @@
       }
 
       if (opJavaCall->_info)                     do_info(opJavaCall->_info);
-      if (opJavaCall->is_method_handle_invoke()) do_temp(FrameMap::method_handle_invoke_SP_save_opr());
+      if (opJavaCall->is_method_handle_invoke()) {
+        opJavaCall->_method_handle_invoke_SP_save_opr = FrameMap::method_handle_invoke_SP_save_opr();
+        do_temp(opJavaCall->_method_handle_invoke_SP_save_opr);
+      }
       do_call();
       if (opJavaCall->_result->is_valid())       do_output(opJavaCall->_result);
 
diff -r 5435e77aa3df -r b862d1f189bd hotspot/src/share/vm/c1/c1_LIR.hpp
--- a/hotspot/src/share/vm/c1/c1_LIR.hpp	Thu May 20 06:34:23 2010 -0700
+++ b/hotspot/src/share/vm/c1/c1_LIR.hpp	Fri May 21 02:59:24 2010 -0700
@@ -1033,8 +1033,9 @@
  friend class LIR_OpVisitState;
 
  private:
-  ciMethod*       _method;
-  LIR_Opr         _receiver;
+  ciMethod* _method;
+  LIR_Opr   _receiver;
+  LIR_Opr   _method_handle_invoke_SP_save_opr;  // Used in LIR_OpVisitState::visit to store the reference to FrameMap::method_handle_invoke_SP_save_opr.
 
  public:
   LIR_OpJavaCall(LIR_Code code, ciMethod* method,
@@ -1043,14 +1044,18 @@
                  CodeEmitInfo* info)
   : LIR_OpCall(code, addr, result, arguments, info)
   , _receiver(receiver)
-  , _method(method)          { assert(is_in_range(code, begin_opJavaCall, end_opJavaCall), "code check"); }
+  , _method(method)
+  , _method_handle_invoke_SP_save_opr(LIR_OprFact::illegalOpr)
+  { assert(is_in_range(code, begin_opJavaCall, end_opJavaCall), "code check"); }
 
   LIR_OpJavaCall(LIR_Code code, ciMethod* method,
                  LIR_Opr receiver, LIR_Opr result, intptr_t vtable_offset,
                  LIR_OprList* arguments, CodeEmitInfo* info)
   : LIR_OpCall(code, (address)vtable_offset, result, arguments, info)
   , _receiver(receiver)
-  , _method(method)          { assert(is_in_range(code, begin_opJavaCall, end_opJavaCall), "code check"); }
+  , _method(method)
+  , _method_handle_invoke_SP_save_opr(LIR_OprFact::illegalOpr)
+  { assert(is_in_range(code, begin_opJavaCall, end_opJavaCall), "code check"); }
 
   LIR_Opr receiver() const                       { return _receiver; }
   ciMethod* method() const                       { return _method;   }
diff -r 5435e77aa3df -r b862d1f189bd hotspot/src/share/vm/c1/c1_LIRAssembler.cpp
--- a/hotspot/src/share/vm/c1/c1_LIRAssembler.cpp	Thu May 20 06:34:23 2010 -0700
+++ b/hotspot/src/share/vm/c1/c1_LIRAssembler.cpp	Fri May 21 02:59:24 2010 -0700
@@ -301,9 +301,9 @@
 }
 
 
-void LIR_Assembler::add_call_info(int pc_offset, CodeEmitInfo* cinfo, bool is_method_handle_invoke) {
+void LIR_Assembler::add_call_info(int pc_offset, CodeEmitInfo* cinfo) {
   flush_debug_info(pc_offset);
-  cinfo->record_debug_info(compilation()->debug_info_recorder(), pc_offset, is_method_handle_invoke);
+  cinfo->record_debug_info(compilation()->debug_info_recorder(), pc_offset);
   if (cinfo->exception_handlers() != NULL) {
     compilation()->add_exception_handlers_for_pco(pc_offset, cinfo->exception_handlers());
   }
@@ -413,12 +413,6 @@
 void LIR_Assembler::emit_call(LIR_OpJavaCall* op) {
   verify_oop_map(op->info());
 
-  // JSR 292
-  // Preserve the SP over MethodHandle call sites.
-  if (op->is_method_handle_invoke()) {
-    preserve_SP(op);
-  }
-
   if (os::is_MP()) {
     // must align calls sites, otherwise they can't be updated atomically on MP hardware
     align_call(op->code());
@@ -444,10 +438,6 @@
   default: ShouldNotReachHere();
   }
 
-  if (op->is_method_handle_invoke()) {
-    restore_SP(op);
-  }
-
 #if defined(X86) && defined(TIERED)
   // C2 leave fpu stack dirty clean it
   if (UseSSE < 2) {
diff -r 5435e77aa3df -r b862d1f189bd hotspot/src/share/vm/c1/c1_LIRAssembler.hpp
--- a/hotspot/src/share/vm/c1/c1_LIRAssembler.hpp	Thu May 20 06:34:23 2010 -0700
+++ b/hotspot/src/share/vm/c1/c1_LIRAssembler.hpp	Fri May 21 02:59:24 2010 -0700
@@ -84,7 +84,7 @@
   Address as_Address_hi(LIR_Address* addr);
 
   // debug information
-  void add_call_info(int pc_offset, CodeEmitInfo* cinfo, bool is_method_handle_invoke = false);
+  void add_call_info(int pc_offset, CodeEmitInfo* cinfo);
   void add_debug_info_for_branch(CodeEmitInfo* info);
   void add_debug_info_for_div0(int pc_offset, CodeEmitInfo* cinfo);
   void add_debug_info_for_div0_here(CodeEmitInfo* info);
@@ -212,10 +212,6 @@
   void ic_call(     LIR_OpJavaCall* op);
   void vtable_call( LIR_OpJavaCall* op);
 
-  // JSR 292
-  void preserve_SP(LIR_OpJavaCall* op);
-  void restore_SP( LIR_OpJavaCall* op);
-
   void osr_entry();
 
   void build_frame();
diff -r 5435e77aa3df -r b862d1f189bd hotspot/src/share/vm/c1/c1_LIRGenerator.cpp
--- a/hotspot/src/share/vm/c1/c1_LIRGenerator.cpp	Thu May 20 06:34:23 2010 -0700
+++ b/hotspot/src/share/vm/c1/c1_LIRGenerator.cpp	Fri May 21 02:59:24 2010 -0700
@@ -2371,9 +2371,17 @@
   bool optimized = x->target_is_loaded() && x->target_is_final();
   assert(receiver->is_illegal() || receiver->is_equal(LIR_Assembler::receiverOpr()), "must match");
 
+  // JSR 292
+  // Preserve the SP over MethodHandle call sites.
+  ciMethod* target = x->target();
+  if (target->is_method_handle_invoke()) {
+    info->set_is_method_handle_invoke(true);
+    __ move(FrameMap::stack_pointer(), FrameMap::method_handle_invoke_SP_save_opr());
+  }
+
   switch (x->code()) {
     case Bytecodes::_invokestatic:
-      __ call_static(x->target(), result_register,
+      __ call_static(target, result_register,
                      SharedRuntime::get_resolve_static_call_stub(),
                      arg_list, info);
       break;
@@ -2383,17 +2391,17 @@
       // for final target we still produce an inline cache, in order
       // to be able to call mixed mode
       if (x->code() == Bytecodes::_invokespecial || optimized) {
-        __ call_opt_virtual(x->target(), receiver, result_register,
+        __ call_opt_virtual(target, receiver, result_register,
                             SharedRuntime::get_resolve_opt_virtual_call_stub(),
                             arg_list, info);
       } else if (x->vtable_index() < 0) {
-        __ call_icvirtual(x->target(), receiver, result_register,
+        __ call_icvirtual(target, receiver, result_register,
                           SharedRuntime::get_resolve_virtual_call_stub(),
                           arg_list, info);
       } else {
         int entry_offset = instanceKlass::vtable_start_offset() + x->vtable_index() * vtableEntry::size();
         int vtable_offset = entry_offset * wordSize + vtableEntry::method_offset_in_bytes();
-        __ call_virtual(x->target(), receiver, result_register, vtable_offset, arg_list, info);
+        __ call_virtual(target, receiver, result_register, vtable_offset, arg_list, info);
       }
       break;
     case Bytecodes::_invokedynamic: {
@@ -2432,7 +2440,7 @@
       // Load target MethodHandle from CallSite object.
       __ load(new LIR_Address(tmp, java_dyn_CallSite::target_offset_in_bytes(), T_OBJECT), receiver);
 
-      __ call_dynamic(x->target(), receiver, result_register,
+      __ call_dynamic(target, receiver, result_register,
                       SharedRuntime::get_resolve_opt_virtual_call_stub(),
                       arg_list, info);
       break;
@@ -2442,6 +2450,12 @@
       break;
   }
 
+  // JSR 292
+  // Restore the SP after MethodHandle call sites.
+  if (target->is_method_handle_invoke()) {
+    __ move(FrameMap::method_handle_invoke_SP_save_opr(), FrameMap::stack_pointer());
+  }
+
   if (x->type()->is_float() || x->type()->is_double()) {
     // Force rounding of results from non-strictfp when in strictfp
     // scope (or when we don't know the strictness of the callee, to
diff -r 5435e77aa3df -r b862d1f189bd hotspot/src/share/vm/ci/ciMethod.cpp
--- a/hotspot/src/share/vm/ci/ciMethod.cpp	Thu May 20 06:34:23 2010 -0700
+++ b/hotspot/src/share/vm/ci/ciMethod.cpp	Fri May 21 02:59:24 2010 -0700
@@ -690,20 +690,32 @@
 
 // ------------------------------------------------------------------
 // invokedynamic support
+
+// ------------------------------------------------------------------
+// ciMethod::is_method_handle_invoke
 //
+// Return true if the method is a MethodHandle target.
 bool ciMethod::is_method_handle_invoke() const {
-  check_is_loaded();
-  bool flag = ((flags().as_int() & JVM_MH_INVOKE_BITS) == JVM_MH_INVOKE_BITS);
+  bool flag = (holder()->name() == ciSymbol::java_dyn_MethodHandle() &&
+               methodOopDesc::is_method_handle_invoke_name(name()->sid()));
 #ifdef ASSERT
-  {
-    VM_ENTRY_MARK;
-    bool flag2 = get_methodOop()->is_method_handle_invoke();
-    assert(flag == flag2, "consistent");
+  if (is_loaded()) {
+    bool flag2 = ((flags().as_int() & JVM_MH_INVOKE_BITS) == JVM_MH_INVOKE_BITS);
+    {
+      VM_ENTRY_MARK;
+      bool flag3 = get_methodOop()->is_method_handle_invoke();
+      assert(flag2 == flag3, "consistent");
+      assert(flag  == flag3, "consistent");
+    }
   }
 #endif //ASSERT
   return flag;
 }
 
+// ------------------------------------------------------------------
+// ciMethod::is_method_handle_adapter
+//
+// Return true if the method is a generated MethodHandle adapter.
 bool ciMethod::is_method_handle_adapter() const {
   check_is_loaded();
   VM_ENTRY_MARK;
diff -r 5435e77aa3df -r b862d1f189bd hotspot/src/share/vm/opto/bytecodeInfo.cpp
--- a/hotspot/src/share/vm/opto/bytecodeInfo.cpp	Thu May 20 06:34:23 2010 -0700
+++ b/hotspot/src/share/vm/opto/bytecodeInfo.cpp	Fri May 21 02:59:24 2010 -0700
@@ -1,5 +1,5 @@
 /*
- * Copyright 1998-2009 Sun Microsystems, Inc.  All Rights Reserved.
+ * Copyright 1998-2010 Sun Microsystems, Inc.  All Rights Reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -188,8 +188,8 @@
     return NULL;
   }
 
-  // Always inline MethodHandle methods.
-  if (callee_method->is_method_handle_invoke())
+  // Always inline MethodHandle methods and generated MethodHandle adapters.
+  if (callee_method->is_method_handle_invoke() || callee_method->is_method_handle_adapter())
     return NULL;
 
   // First check all inlining restrictions which are required for correctness
diff -r 5435e77aa3df -r b862d1f189bd hotspot/src/share/vm/runtime/sharedRuntime.cpp
--- a/hotspot/src/share/vm/runtime/sharedRuntime.cpp	Thu May 20 06:34:23 2010 -0700
+++ b/hotspot/src/share/vm/runtime/sharedRuntime.cpp	Fri May 21 02:59:24 2010 -0700
@@ -2055,11 +2055,11 @@
   void scan() {
     while (_index < _table->table_size()) {
       AdapterHandlerEntry* a = _table->bucket(_index);
+      _index++;
       if (a != NULL) {
         _current = a;
         return;
       }
-      _index++;
     }
   }