jdk8-mips64-public/hotspot: src/share/vm/c1/c1_LIRAssembler.cpp@18a389214829 (annotated)

src/share/vm/c1/c1_LIRAssembler.cpp@18a389214829 (annotated)

src/share/vm/c1/c1_LIRAssembler.cpp

Mon, 01 Feb 2010 19:29:46 +0100

author: twisti
date: Mon, 01 Feb 2010 19:29:46 +0100
changeset 1639: 18a389214829
parent 1383: 89e0543e1737
child 1730: 3cf667df43ef
permissions: -rw-r--r--

6921352: JSR 292 needs its own deopt handler
Summary: We need to introduce a new MH deopt handler so we can easily determine if the deopt happened at a MH call site or not.
Reviewed-by: never, jrose

 /*
  * Copyright 2000-2009 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/_c1_LIRAssembler.cpp.incl"
 void LIR_Assembler::patching_epilog(PatchingStub* patch, LIR_PatchCode patch_code, Register obj, CodeEmitInfo* info) {
   // we must have enough patching space so that call can be inserted
   while ((intx) _masm->pc() - (intx) patch->pc_start() < NativeCall::instruction_size) {
     _masm->nop();
   }
   patch->install(_masm, patch_code, obj, info);
   append_patching_stub(patch);
 #ifdef ASSERT
   Bytecodes::Code code = info->scope()->method()->java_code_at_bci(info->bci());
   if (patch->id() == PatchingStub::access_field_id) {
     switch (code) {
       case Bytecodes::_putstatic:
       case Bytecodes::_getstatic:
       case Bytecodes::_putfield:
       case Bytecodes::_getfield:
         break;
       default:
         ShouldNotReachHere();
     }
   } else if (patch->id() == PatchingStub::load_klass_id) {
     switch (code) {
       case Bytecodes::_putstatic:
       case Bytecodes::_getstatic:
       case Bytecodes::_new:
       case Bytecodes::_anewarray:
       case Bytecodes::_multianewarray:
       case Bytecodes::_instanceof:
       case Bytecodes::_checkcast:
       case Bytecodes::_ldc:
       case Bytecodes::_ldc_w:
         break;
       default:
         ShouldNotReachHere();
     }
   } else {
     ShouldNotReachHere();
   }
 #endif
 }
 //---------------------------------------------------------------
 LIR_Assembler::LIR_Assembler(Compilation* c):
    _compilation(c)
  , _masm(c->masm())
  , _bs(Universe::heap()->barrier_set())
  , _frame_map(c->frame_map())
  , _current_block(NULL)
  , _pending_non_safepoint(NULL)
  , _pending_non_safepoint_offset(0)
 {
   _slow_case_stubs = new CodeStubList();
 }
 LIR_Assembler::~LIR_Assembler() {
 }
 void LIR_Assembler::append_patching_stub(PatchingStub* stub) {
   _slow_case_stubs->append(stub);
 }
 void LIR_Assembler::check_codespace() {
   CodeSection* cs = _masm->code_section();
   if (cs->remaining() < (int)(1*K)) {
     BAILOUT("CodeBuffer overflow");
   }
 }
 void LIR_Assembler::emit_code_stub(CodeStub* stub) {
   _slow_case_stubs->append(stub);
 }
 void LIR_Assembler::emit_stubs(CodeStubList* stub_list) {
   for (int m = 0; m < stub_list->length(); m++) {
     CodeStub* s = (*stub_list)[m];
     check_codespace();
     CHECK_BAILOUT();
 #ifndef PRODUCT
     if (CommentedAssembly) {
       stringStream st;
       s->print_name(&st);
       st.print(" slow case");
       _masm->block_comment(st.as_string());
     }
 #endif
     s->emit_code(this);
 #ifdef ASSERT
     s->assert_no_unbound_labels();
 #endif
   }
 }
 void LIR_Assembler::emit_slow_case_stubs() {
   emit_stubs(_slow_case_stubs);
 }
 bool LIR_Assembler::needs_icache(ciMethod* method) const {
   return !method->is_static();
 }
 int LIR_Assembler::code_offset() const {
   return _masm->offset();
 }
 address LIR_Assembler::pc() const {
   return _masm->pc();
 }
 void LIR_Assembler::emit_exception_entries(ExceptionInfoList* info_list) {
   for (int i = 0; i < info_list->length(); i++) {
     XHandlers* handlers = info_list->at(i)->exception_handlers();
     for (int j = 0; j < handlers->length(); j++) {
       XHandler* handler = handlers->handler_at(j);
       assert(handler->lir_op_id() != -1, "handler not processed by LinearScan");
       assert(handler->entry_code() == NULL ||
              handler->entry_code()->instructions_list()->last()->code() == lir_branch ||
              handler->entry_code()->instructions_list()->last()->code() == lir_delay_slot, "last operation must be branch");
       if (handler->entry_pco() == -1) {
         // entry code not emitted yet
         if (handler->entry_code() != NULL && handler->entry_code()->instructions_list()->length() > 1) {
           handler->set_entry_pco(code_offset());
           if (CommentedAssembly) {
             _masm->block_comment("Exception adapter block");
           }
           emit_lir_list(handler->entry_code());
         } else {
           handler->set_entry_pco(handler->entry_block()->exception_handler_pco());
         }
         assert(handler->entry_pco() != -1, "must be set now");
       }
     }
   }
 }
 void LIR_Assembler::emit_code(BlockList* hir) {
   if (PrintLIR) {
     print_LIR(hir);
   }
   int n = hir->length();
   for (int i = 0; i < n; i++) {
     emit_block(hir->at(i));
     CHECK_BAILOUT();
   }
   flush_debug_info(code_offset());
   DEBUG_ONLY(check_no_unbound_labels());
 }
 void LIR_Assembler::emit_block(BlockBegin* block) {
   if (block->is_set(BlockBegin::backward_branch_target_flag)) {
     align_backward_branch_target();
   }
   // if this block is the start of an exception handler, record the
   // PC offset of the first instruction for later construction of
   // the ExceptionHandlerTable
   if (block->is_set(BlockBegin::exception_entry_flag)) {
     block->set_exception_handler_pco(code_offset());
   }
 #ifndef PRODUCT
   if (PrintLIRWithAssembly) {
     // don't print Phi's
     InstructionPrinter ip(false);
     block->print(ip);
   }
 #endif /* PRODUCT */
   assert(block->lir() != NULL, "must have LIR");
   X86_ONLY(assert(_masm->rsp_offset() == 0, "frame size should be fixed"));
 #ifndef PRODUCT
   if (CommentedAssembly) {
     stringStream st;
     st.print_cr(" block B%d [%d, %d]", block->block_id(), block->bci(), block->end()->bci());
     _masm->block_comment(st.as_string());
   }
 #endif
   emit_lir_list(block->lir());
   X86_ONLY(assert(_masm->rsp_offset() == 0, "frame size should be fixed"));
 }
 void LIR_Assembler::emit_lir_list(LIR_List* list) {
   peephole(list);
   int n = list->length();
   for (int i = 0; i < n; i++) {
     LIR_Op* op = list->at(i);
     check_codespace();
     CHECK_BAILOUT();
 #ifndef PRODUCT
     if (CommentedAssembly) {
       // Don't record out every op since that's too verbose.  Print
       // branches since they include block and stub names.  Also print
       // patching moves since they generate funny looking code.
       if (op->code() == lir_branch ||
           (op->code() == lir_move && op->as_Op1()->patch_code() != lir_patch_none)) {
         stringStream st;
         op->print_on(&st);
         _masm->block_comment(st.as_string());
       }
     }
     if (PrintLIRWithAssembly) {
       // print out the LIR operation followed by the resulting assembly
       list->at(i)->print(); tty->cr();
     }
 #endif /* PRODUCT */
     op->emit_code(this);
     if (compilation()->debug_info_recorder()->recording_non_safepoints()) {
       process_debug_info(op);
     }
 #ifndef PRODUCT
     if (PrintLIRWithAssembly) {
       _masm->code()->decode();
     }
 #endif /* PRODUCT */
   }
 }
 #ifdef ASSERT
 void LIR_Assembler::check_no_unbound_labels() {
   CHECK_BAILOUT();
   for (int i = 0; i < _branch_target_blocks.length() - 1; i++) {
     if (!_branch_target_blocks.at(i)->label()->is_bound()) {
       tty->print_cr("label of block B%d is not bound", _branch_target_blocks.at(i)->block_id());
       assert(false, "unbound label");
     }
   }
 }
 #endif
 //----------------------------------debug info--------------------------------
 void LIR_Assembler::add_debug_info_for_branch(CodeEmitInfo* info) {
   _masm->code_section()->relocate(pc(), relocInfo::poll_type);
   int pc_offset = code_offset();
   flush_debug_info(pc_offset);
   info->record_debug_info(compilation()->debug_info_recorder(), pc_offset);
   if (info->exception_handlers() != NULL) {
     compilation()->add_exception_handlers_for_pco(pc_offset, info->exception_handlers());
   }
 }
 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);
   if (cinfo->exception_handlers() != NULL) {
     compilation()->add_exception_handlers_for_pco(pc_offset, cinfo->exception_handlers());
   }
 }
 static ValueStack* debug_info(Instruction* ins) {
   StateSplit* ss = ins->as_StateSplit();
   if (ss != NULL) return ss->state();
   return ins->lock_stack();
 }
 void LIR_Assembler::process_debug_info(LIR_Op* op) {
   Instruction* src = op->source();
   if (src == NULL)  return;
   int pc_offset = code_offset();
   if (_pending_non_safepoint == src) {
     _pending_non_safepoint_offset = pc_offset;
     return;
   }
   ValueStack* vstack = debug_info(src);
   if (vstack == NULL)  return;
   if (_pending_non_safepoint != NULL) {
     // Got some old debug info.  Get rid of it.
     if (_pending_non_safepoint->bci() == src->bci() &&
         debug_info(_pending_non_safepoint) == vstack) {
       _pending_non_safepoint_offset = pc_offset;
       return;
     }
     if (_pending_non_safepoint_offset < pc_offset) {
       record_non_safepoint_debug_info();
     }
     _pending_non_safepoint = NULL;
   }
   // Remember the debug info.
   if (pc_offset > compilation()->debug_info_recorder()->last_pc_offset()) {
     _pending_non_safepoint = src;
     _pending_non_safepoint_offset = pc_offset;
   }
 }
 // Index caller states in s, where 0 is the oldest, 1 its callee, etc.
 // Return NULL if n is too large.
 // Returns the caller_bci for the next-younger state, also.
 static ValueStack* nth_oldest(ValueStack* s, int n, int& bci_result) {
   ValueStack* t = s;
   for (int i = 0; i < n; i++) {
     if (t == NULL)  break;
     t = t->caller_state();
   }
   if (t == NULL)  return NULL;
   for (;;) {
     ValueStack* tc = t->caller_state();
     if (tc == NULL)  return s;
     t = tc;
     bci_result = s->scope()->caller_bci();
     s = s->caller_state();
   }
 }
 void LIR_Assembler::record_non_safepoint_debug_info() {
   int         pc_offset = _pending_non_safepoint_offset;
   ValueStack* vstack    = debug_info(_pending_non_safepoint);
   int         bci       = _pending_non_safepoint->bci();
   DebugInformationRecorder* debug_info = compilation()->debug_info_recorder();
   assert(debug_info->recording_non_safepoints(), "sanity");
   debug_info->add_non_safepoint(pc_offset);
   // Visit scopes from oldest to youngest.
   for (int n = 0; ; n++) {
     int s_bci = bci;
     ValueStack* s = nth_oldest(vstack, n, s_bci);
     if (s == NULL)  break;
     IRScope* scope = s->scope();
     //Always pass false for reexecute since these ScopeDescs are never used for deopt
     debug_info->describe_scope(pc_offset, scope->method(), s_bci, false/*reexecute*/);
   }
   debug_info->end_non_safepoint(pc_offset);
 }
 void LIR_Assembler::add_debug_info_for_null_check_here(CodeEmitInfo* cinfo) {
   add_debug_info_for_null_check(code_offset(), cinfo);
 }
 void LIR_Assembler::add_debug_info_for_null_check(int pc_offset, CodeEmitInfo* cinfo) {
   ImplicitNullCheckStub* stub = new ImplicitNullCheckStub(pc_offset, cinfo);
   emit_code_stub(stub);
 }
 void LIR_Assembler::add_debug_info_for_div0_here(CodeEmitInfo* info) {
   add_debug_info_for_div0(code_offset(), info);
 }
 void LIR_Assembler::add_debug_info_for_div0(int pc_offset, CodeEmitInfo* cinfo) {
   DivByZeroStub* stub = new DivByZeroStub(pc_offset, cinfo);
   emit_code_stub(stub);
 }
 void LIR_Assembler::emit_rtcall(LIR_OpRTCall* op) {
   rt_call(op->result_opr(), op->addr(), op->arguments(), op->tmp(), op->info());
 }
 void LIR_Assembler::emit_call(LIR_OpJavaCall* op) {
   verify_oop_map(op->info());
   if (os::is_MP()) {
     // must align calls sites, otherwise they can't be updated atomically on MP hardware
     align_call(op->code());
   }
   // emit the static call stub stuff out of line
   emit_static_call_stub();
   switch (op->code()) {
   case lir_static_call:
     call(op->addr(), relocInfo::static_call_type, op->info());
     break;
   case lir_optvirtual_call:
     call(op->addr(), relocInfo::opt_virtual_call_type, op->info());
     break;
   case lir_icvirtual_call:
     ic_call(op->addr(), op->info());
     break;
   case lir_virtual_call:
     vtable_call(op->vtable_offset(), op->info());
     break;
   default: ShouldNotReachHere();
   }
 #if defined(X86) && defined(TIERED)
   // C2 leave fpu stack dirty clean it
   if (UseSSE < 2) {
     int i;
     for ( i = 1; i <= 7 ; i++ ) {
       ffree(i);
     }
     if (!op->result_opr()->is_float_kind()) {
       ffree(0);
     }
   }
 #endif // X86 && TIERED
 }
 void LIR_Assembler::emit_opLabel(LIR_OpLabel* op) {
   _masm->bind (*(op->label()));
 }
 void LIR_Assembler::emit_op1(LIR_Op1* op) {
   switch (op->code()) {
     case lir_move:
       if (op->move_kind() == lir_move_volatile) {
         assert(op->patch_code() == lir_patch_none, "can't patch volatiles");
         volatile_move_op(op->in_opr(), op->result_opr(), op->type(), op->info());
       } else {
         move_op(op->in_opr(), op->result_opr(), op->type(),
                 op->patch_code(), op->info(), op->pop_fpu_stack(), op->move_kind() == lir_move_unaligned);
       }
       break;
     case lir_prefetchr:
       prefetchr(op->in_opr());
       break;
     case lir_prefetchw:
       prefetchw(op->in_opr());
       break;
     case lir_roundfp: {
       LIR_OpRoundFP* round_op = op->as_OpRoundFP();
       roundfp_op(round_op->in_opr(), round_op->tmp(), round_op->result_opr(), round_op->pop_fpu_stack());
       break;
     }
     case lir_return:
       return_op(op->in_opr());
       break;
     case lir_safepoint:
       if (compilation()->debug_info_recorder()->last_pc_offset() == code_offset()) {
         _masm->nop();
       }
       safepoint_poll(op->in_opr(), op->info());
       break;
     case lir_fxch:
       fxch(op->in_opr()->as_jint());
       break;
     case lir_fld:
       fld(op->in_opr()->as_jint());
       break;
     case lir_ffree:
       ffree(op->in_opr()->as_jint());
       break;
     case lir_branch:
       break;
     case lir_push:
       push(op->in_opr());
       break;
     case lir_pop:
       pop(op->in_opr());
       break;
     case lir_neg:
       negate(op->in_opr(), op->result_opr());
       break;
     case lir_leal:
       leal(op->in_opr(), op->result_opr());
       break;
     case lir_null_check:
       if (GenerateCompilerNullChecks) {
         add_debug_info_for_null_check_here(op->info());
         if (op->in_opr()->is_single_cpu()) {
           _masm->null_check(op->in_opr()->as_register());
         } else {
           Unimplemented();
         }
       }
       break;
     case lir_monaddr:
       monitor_address(op->in_opr()->as_constant_ptr()->as_jint(), op->result_opr());
       break;
     default:
       Unimplemented();
       break;
   }
 }
 void LIR_Assembler::emit_op0(LIR_Op0* op) {
   switch (op->code()) {
     case lir_word_align: {
       while (code_offset() % BytesPerWord != 0) {
         _masm->nop();
       }
       break;
     }
     case lir_nop:
       assert(op->info() == NULL, "not supported");
       _masm->nop();
       break;
     case lir_label:
       Unimplemented();
       break;
     case lir_build_frame:
       build_frame();
       break;
     case lir_std_entry:
       // init offsets
       offsets()->set_value(CodeOffsets::OSR_Entry, _masm->offset());
       _masm->align(CodeEntryAlignment);
       if (needs_icache(compilation()->method())) {
         check_icache();
       }
       offsets()->set_value(CodeOffsets::Verified_Entry, _masm->offset());
       _masm->verified_entry();
       build_frame();
       offsets()->set_value(CodeOffsets::Frame_Complete, _masm->offset());
       break;
     case lir_osr_entry:
       offsets()->set_value(CodeOffsets::OSR_Entry, _masm->offset());
       osr_entry();
       break;
     case lir_24bit_FPU:
       set_24bit_FPU();
       break;
     case lir_reset_FPU:
       reset_FPU();
       break;
     case lir_breakpoint:
       breakpoint();
       break;
     case lir_fpop_raw:
       fpop();
       break;
     case lir_membar:
       membar();
       break;
     case lir_membar_acquire:
       membar_acquire();
       break;
     case lir_membar_release:
       membar_release();
       break;
     case lir_get_thread:
       get_thread(op->result_opr());
       break;
     default:
       ShouldNotReachHere();
       break;
   }
 }
 void LIR_Assembler::emit_op2(LIR_Op2* op) {
   switch (op->code()) {
     case lir_cmp:
       if (op->info() != NULL) {
         assert(op->in_opr1()->is_address() || op->in_opr2()->is_address(),
                "shouldn't be codeemitinfo for non-address operands");
         add_debug_info_for_null_check_here(op->info()); // exception possible
       }
       comp_op(op->condition(), op->in_opr1(), op->in_opr2(), op);
       break;
     case lir_cmp_l2i:
     case lir_cmp_fd2i:
     case lir_ucmp_fd2i:
       comp_fl2i(op->code(), op->in_opr1(), op->in_opr2(), op->result_opr(), op);
       break;
     case lir_cmove:
       cmove(op->condition(), op->in_opr1(), op->in_opr2(), op->result_opr());
       break;
     case lir_shl:
     case lir_shr:
     case lir_ushr:
       if (op->in_opr2()->is_constant()) {
         shift_op(op->code(), op->in_opr1(), op->in_opr2()->as_constant_ptr()->as_jint(), op->result_opr());
       } else {
         shift_op(op->code(), op->in_opr1(), op->in_opr2(), op->result_opr(), op->tmp_opr());
       }
       break;
     case lir_add:
     case lir_sub:
     case lir_mul:
     case lir_mul_strictfp:
     case lir_div:
     case lir_div_strictfp:
     case lir_rem:
       assert(op->fpu_pop_count() < 2, "");
       arith_op(
         op->code(),
         op->in_opr1(),
         op->in_opr2(),
         op->result_opr(),
         op->info(),
         op->fpu_pop_count() == 1);
       break;
     case lir_abs:
     case lir_sqrt:
     case lir_sin:
     case lir_tan:
     case lir_cos:
     case lir_log:
     case lir_log10:
       intrinsic_op(op->code(), op->in_opr1(), op->in_opr2(), op->result_opr(), op);
       break;
     case lir_logic_and:
     case lir_logic_or:
     case lir_logic_xor:
       logic_op(
         op->code(),
         op->in_opr1(),
         op->in_opr2(),
         op->result_opr());
       break;
     case lir_throw:
     case lir_unwind:
       throw_op(op->in_opr1(), op->in_opr2(), op->info(), op->code() == lir_unwind);
       break;
     default:
       Unimplemented();
       break;
   }
 }
 void LIR_Assembler::build_frame() {
   _masm->build_frame(initial_frame_size_in_bytes());
 }
 void LIR_Assembler::roundfp_op(LIR_Opr src, LIR_Opr tmp, LIR_Opr dest, bool pop_fpu_stack) {
   assert((src->is_single_fpu() && dest->is_single_stack()) ||
          (src->is_double_fpu() && dest->is_double_stack()),
          "round_fp: rounds register -> stack location");
   reg2stack (src, dest, src->type(), pop_fpu_stack);
 }
 void LIR_Assembler::move_op(LIR_Opr src, LIR_Opr dest, BasicType type, LIR_PatchCode patch_code, CodeEmitInfo* info, bool pop_fpu_stack, bool unaligned) {
   if (src->is_register()) {
     if (dest->is_register()) {
       assert(patch_code == lir_patch_none && info == NULL, "no patching and info allowed here");
       reg2reg(src,  dest);
     } else if (dest->is_stack()) {
       assert(patch_code == lir_patch_none && info == NULL, "no patching and info allowed here");
       reg2stack(src, dest, type, pop_fpu_stack);
     } else if (dest->is_address()) {
       reg2mem(src, dest, type, patch_code, info, pop_fpu_stack, unaligned);
     } else {
       ShouldNotReachHere();
     }
   } else if (src->is_stack()) {
     assert(patch_code == lir_patch_none && info == NULL, "no patching and info allowed here");
     if (dest->is_register()) {
       stack2reg(src, dest, type);
     } else if (dest->is_stack()) {
       stack2stack(src, dest, type);
     } else {
       ShouldNotReachHere();
     }
   } else if (src->is_constant()) {
     if (dest->is_register()) {
       const2reg(src, dest, patch_code, info); // patching is possible
     } else if (dest->is_stack()) {
       assert(patch_code == lir_patch_none && info == NULL, "no patching and info allowed here");
       const2stack(src, dest);
     } else if (dest->is_address()) {
       assert(patch_code == lir_patch_none, "no patching allowed here");
       const2mem(src, dest, type, info);
     } else {
       ShouldNotReachHere();
     }
   } else if (src->is_address()) {
     mem2reg(src, dest, type, patch_code, info, unaligned);
   } else {
     ShouldNotReachHere();
   }
 }
 void LIR_Assembler::verify_oop_map(CodeEmitInfo* info) {
 #ifndef PRODUCT
   if (VerifyOopMaps || VerifyOops) {
     bool v = VerifyOops;
     VerifyOops = true;
     OopMapStream s(info->oop_map());
     while (!s.is_done()) {
       OopMapValue v = s.current();
       if (v.is_oop()) {
         VMReg r = v.reg();
         if (!r->is_stack()) {
           stringStream st;
           st.print("bad oop %s at %d", r->as_Register()->name(), _masm->offset());
 #ifdef SPARC
           _masm->_verify_oop(r->as_Register(), strdup(st.as_string()), __FILE__, __LINE__);
 #else
           _masm->verify_oop(r->as_Register());
 #endif
         } else {
           _masm->verify_stack_oop(r->reg2stack() * VMRegImpl::stack_slot_size);
         }
       }
       s.next();
     }
     VerifyOops = v;
   }
 #endif
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/c1/c1_LIRAssembler.cpp@18a389214829 (annotated)

src/share/vm/c1/c1_LIRAssembler.cpp