jdk8-mips64-public/hotspot: src/share/vm/opto/generateOptoStub.cpp@a61af66fc99e (annotated)

src/share/vm/opto/generateOptoStub.cpp@a61af66fc99e (annotated)

src/share/vm/opto/generateOptoStub.cpp

Sat, 01 Dec 2007 00:00:00 +0000

author: duke
date: Sat, 01 Dec 2007 00:00:00 +0000
changeset 435: a61af66fc99e
child 1907: c18cbe5936b8
permissions: -rw-r--r--

Initial load

 /*
  * Copyright 1999-2006 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
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  * CA 95054 USA or visit www.sun.com if you need additional information or
  * have any questions.
  *
  */
 #include "incls/_precompiled.incl"
 #include "incls/_generateOptoStub.cpp.incl"
 //--------------------gen_stub-------------------------------
 void GraphKit::gen_stub(address C_function,
                         const char *name,
                         int is_fancy_jump,
                         bool pass_tls,
                         bool return_pc) {
   ResourceMark rm;
   const TypeTuple *jdomain = C->tf()->domain();
   const TypeTuple *jrange  = C->tf()->range();
   // The procedure start
   StartNode* start = new (C, 2) StartNode(root(), jdomain);
   _gvn.set_type_bottom(start);
   // Make a map, with JVM state
   uint parm_cnt = jdomain->cnt();
   uint max_map = MAX2(2*parm_cnt+1, jrange->cnt());
   // %%% SynchronizationEntryBCI is redundant; use InvocationEntryBci in interfaces
   assert(SynchronizationEntryBCI == InvocationEntryBci, "");
   JVMState* jvms = new (C) JVMState(0);
   jvms->set_bci(InvocationEntryBci);
   jvms->set_monoff(max_map);
   jvms->set_endoff(max_map);
   {
     SafePointNode *map = new (C, max_map) SafePointNode( max_map, jvms );
     jvms->set_map(map);
     set_jvms(jvms);
     assert(map == this->map(), "kit.map is set");
   }
   // Make up the parameters
   uint i;
   for( i = 0; i < parm_cnt; i++ )
     map()->init_req(i, _gvn.transform(new (C, 1) ParmNode(start, i)));
   for( ; i<map()->req(); i++ )
     map()->init_req(i, top());      // For nicer debugging
   // GraphKit requires memory to be a MergeMemNode:
   set_all_memory(map()->memory());
   // Get base of thread-local storage area
   Node* thread = _gvn.transform( new (C, 1) ThreadLocalNode() );
   const int NoAlias = Compile::AliasIdxBot;
   Node* adr_last_Java_pc = basic_plus_adr(top(),
                                             thread,
                                             in_bytes(JavaThread::frame_anchor_offset()) +
                                             in_bytes(JavaFrameAnchor::last_Java_pc_offset()));
 #if defined(SPARC) || defined(IA64)
   Node* adr_flags = basic_plus_adr(top(),
                                    thread,
                                    in_bytes(JavaThread::frame_anchor_offset()) +
                                    in_bytes(JavaFrameAnchor::flags_offset()));
 #endif /* defined(SPARC) || defined(IA64) */
   // Drop in the last_Java_sp.  last_Java_fp is not touched.
   // Always do this after the other "last_Java_frame" fields are set since
   // as soon as last_Java_sp != NULL the has_last_Java_frame is true and
   // users will look at the other fields.
   //
   Node *adr_sp = basic_plus_adr(top(), thread, in_bytes(JavaThread::last_Java_sp_offset()));
 #ifndef IA64
   Node *last_sp = basic_plus_adr(top(), frameptr(), (intptr_t) STACK_BIAS);
   store_to_memory(NULL, adr_sp, last_sp, T_ADDRESS, NoAlias);
 #endif
   // Set _thread_in_native
   // The order of stores into TLS is critical!  Setting _thread_in_native MUST
   // be last, because a GC is allowed at any time after setting it and the GC
   // will require last_Java_pc and last_Java_sp.
   Node* adr_state = basic_plus_adr(top(), thread, in_bytes(JavaThread::thread_state_offset()));
   //-----------------------------
   // Compute signature for C call.  Varies from the Java signature!
   const Type **fields = TypeTuple::fields(2*parm_cnt+2);
   uint cnt = TypeFunc::Parms;
   // The C routines gets the base of thread-local storage passed in as an
   // extra argument.  Not all calls need it, but its cheap to add here.
   for( ; cnt<parm_cnt; cnt++ )
     fields[cnt] = jdomain->field_at(cnt);
   fields[cnt++] = TypeRawPtr::BOTTOM; // Thread-local storage
   // Also pass in the caller's PC, if asked for.
   if( return_pc )
     fields[cnt++] = TypeRawPtr::BOTTOM; // Return PC
   const TypeTuple* domain = TypeTuple::make(cnt,fields);
   // The C routine we are about to call cannot return an oop; it can block on
   // exit and a GC will trash the oop while it sits in C-land.  Instead, we
   // return the oop through TLS for runtime calls.
   // Also, C routines returning integer subword values leave the high
   // order bits dirty; these must be cleaned up by explicit sign extension.
   const Type* retval = (jrange->cnt() == TypeFunc::Parms) ? Type::TOP : jrange->field_at(TypeFunc::Parms);
   // Make a private copy of jrange->fields();
   const Type **rfields = TypeTuple::fields(jrange->cnt() - TypeFunc::Parms);
   // Fixup oop returns
   int retval_ptr = retval->isa_oop_ptr();
   if( retval_ptr ) {
     assert( pass_tls, "Oop must be returned thru TLS" );
     // Fancy-jumps return address; others return void
     rfields[TypeFunc::Parms] = is_fancy_jump ? TypeRawPtr::BOTTOM : Type::TOP;
   } else if( retval->isa_int() ) { // Returning any integer subtype?
     // "Fatten" byte, char & short return types to 'int' to show that
     // the native C code can return values with junk high order bits.
     // We'll sign-extend it below later.
     rfields[TypeFunc::Parms] = TypeInt::INT; // It's "dirty" and needs sign-ext
   } else if( jrange->cnt() >= TypeFunc::Parms+1 ) { // Else copy other types
     rfields[TypeFunc::Parms] = jrange->field_at(TypeFunc::Parms);
     if( jrange->cnt() == TypeFunc::Parms+2 )
       rfields[TypeFunc::Parms+1] = jrange->field_at(TypeFunc::Parms+1);
   }
   const TypeTuple* range = TypeTuple::make(jrange->cnt(),rfields);
   // Final C signature
   const TypeFunc *c_sig = TypeFunc::make(domain,range);
   //-----------------------------
   // Make the call node
   CallRuntimeNode *call = new (C, c_sig->domain()->cnt())
     CallRuntimeNode(c_sig, C_function, name, TypePtr::BOTTOM);
   //-----------------------------
   // Fix-up the debug info for the call
   call->set_jvms( new (C) JVMState(0) );
   call->jvms()->set_bci(0);
   call->jvms()->set_offsets(cnt);
   // Set fixed predefined input arguments
   cnt = 0;
   for( i=0; i<TypeFunc::Parms; i++ )
     call->init_req( cnt++, map()->in(i) );
   // A little too aggressive on the parm copy; return address is not an input
   call->set_req(TypeFunc::ReturnAdr, top());
   for( ; i<parm_cnt; i++ )    // Regular input arguments
     call->init_req( cnt++, map()->in(i) );
   call->init_req( cnt++, thread );
   if( return_pc )             // Return PC, if asked for
     call->init_req( cnt++, returnadr() );
   _gvn.transform_no_reclaim(call);
   //-----------------------------
   // Now set up the return results
   set_control( _gvn.transform( new (C, 1) ProjNode(call,TypeFunc::Control)) );
   set_i_o(     _gvn.transform( new (C, 1) ProjNode(call,TypeFunc::I_O    )) );
   set_all_memory_call(call);
   if (range->cnt() > TypeFunc::Parms) {
     Node* retnode = _gvn.transform( new (C, 1) ProjNode(call,TypeFunc::Parms) );
     // C-land is allowed to return sub-word values.  Convert to integer type.
     assert( retval != Type::TOP, "" );
     if (retval == TypeInt::BOOL) {
       retnode = _gvn.transform( new (C, 3) AndINode(retnode, intcon(0xFF)) );
     } else if (retval == TypeInt::CHAR) {
       retnode = _gvn.transform( new (C, 3) AndINode(retnode, intcon(0xFFFF)) );
     } else if (retval == TypeInt::BYTE) {
       retnode = _gvn.transform( new (C, 3) LShiftINode(retnode, intcon(24)) );
       retnode = _gvn.transform( new (C, 3) RShiftINode(retnode, intcon(24)) );
     } else if (retval == TypeInt::SHORT) {
       retnode = _gvn.transform( new (C, 3) LShiftINode(retnode, intcon(16)) );
       retnode = _gvn.transform( new (C, 3) RShiftINode(retnode, intcon(16)) );
     }
     map()->set_req( TypeFunc::Parms, retnode );
   }
   //-----------------------------
   // Clear last_Java_sp
 #ifdef IA64
   if( os::is_MP() ) insert_mem_bar(Op_MemBarRelease);
 #endif
   store_to_memory(NULL, adr_sp, null(), T_ADDRESS, NoAlias);
 #ifdef IA64
   if (os::is_MP() && UseMembar) insert_mem_bar(new MemBarVolatileNode());
 #endif // def IA64
   // Clear last_Java_pc and (optionally)_flags
   store_to_memory(NULL, adr_last_Java_pc, null(), T_ADDRESS, NoAlias);
 #if defined(SPARC) || defined(IA64)
   store_to_memory(NULL, adr_flags, intcon(0), T_INT, NoAlias);
 #endif /* defined(SPARC) || defined(IA64) */
 #ifdef IA64
   Node* adr_last_Java_fp = basic_plus_adr(top(), thread, in_bytes(JavaThread::last_Java_fp_offset()));
   if( os::is_MP() ) insert_mem_bar(Op_MemBarRelease);
   store_to_memory(NULL, adr_last_Java_fp,    null(),    T_ADDRESS, NoAlias);
 #endif
   // For is-fancy-jump, the C-return value is also the branch target
   Node* target = map()->in(TypeFunc::Parms);
   // Runtime call returning oop in TLS?  Fetch it out
   if( pass_tls ) {
     Node* adr = basic_plus_adr(top(), thread, in_bytes(JavaThread::vm_result_offset()));
     Node* vm_result = make_load(NULL, adr, TypeOopPtr::BOTTOM, T_OBJECT, NoAlias, false);
     map()->set_req(TypeFunc::Parms, vm_result); // vm_result passed as result
     // clear thread-local-storage(tls)
     store_to_memory(NULL, adr, null(), T_ADDRESS, NoAlias);
   }
   //-----------------------------
   // check exception
   Node* adr = basic_plus_adr(top(), thread, in_bytes(Thread::pending_exception_offset()));
   Node* pending = make_load(NULL, adr, TypeOopPtr::BOTTOM, T_OBJECT, NoAlias, false);
   Node* exit_memory = reset_memory();
   Node* cmp = _gvn.transform( new (C, 3) CmpPNode(pending, null()) );
   Node* bo  = _gvn.transform( new (C, 2) BoolNode(cmp, BoolTest::ne) );
   IfNode   *iff = create_and_map_if(control(), bo, PROB_MIN, COUNT_UNKNOWN);
   Node* if_null     = _gvn.transform( new (C, 1) IfFalseNode(iff) );
   Node* if_not_null = _gvn.transform( new (C, 1) IfTrueNode(iff)  );
   assert (StubRoutines::forward_exception_entry() != NULL, "must be generated before");
   Node *exc_target = makecon(TypeRawPtr::make( StubRoutines::forward_exception_entry() ));
   Node *to_exc = new (C, TypeFunc::Parms+2) TailCallNode(if_not_null,
                                   i_o(),
                                   exit_memory,
                                   frameptr(),
                                   returnadr(),
                                   exc_target, null());
   root()->add_req(_gvn.transform(to_exc));  // bind to root to keep live
   C->init_start(start);
   //-----------------------------
   // If this is a normal subroutine return, issue the return and be done.
   Node *ret;
   switch( is_fancy_jump ) {
   case 0:                       // Make a return instruction
     // Return to caller, free any space for return address
     ret = new (C, TypeFunc::Parms) ReturnNode(TypeFunc::Parms, if_null,
                          i_o(),
                          exit_memory,
                          frameptr(),
                          returnadr());
     if (C->tf()->range()->cnt() > TypeFunc::Parms)
       ret->add_req( map()->in(TypeFunc::Parms) );
     break;
   case 1:    // This is a fancy tail-call jump.  Jump to computed address.
     // Jump to new callee; leave old return address alone.
     ret = new (C, TypeFunc::Parms+2) TailCallNode(if_null,
                            i_o(),
                            exit_memory,
                            frameptr(),
                            returnadr(),
                            target, map()->in(TypeFunc::Parms));
     break;
   case 2:                       // Pop return address & jump
     // Throw away old return address; jump to new computed address
     //assert(C_function == CAST_FROM_FN_PTR(address, OptoRuntime::rethrow_C), "fancy_jump==2 only for rethrow");
     ret = new (C, TypeFunc::Parms+2) TailJumpNode(if_null,
                            i_o(),
                            exit_memory,
                            frameptr(),
                            target, map()->in(TypeFunc::Parms));
     break;
   default:
     ShouldNotReachHere();
   }
   root()->add_req(_gvn.transform(ret));
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/opto/generateOptoStub.cpp@a61af66fc99e (annotated)

src/share/vm/opto/generateOptoStub.cpp