jdk8-mips64-public/hotspot: src/share/vm/ci/ciSignature.cpp@194b8e3a2fc4

6384206: Phis which are later unneeded are impairing our ability to inline based on static types
Reviewed-by: rasbold, jrose

     1 /*

     2  * Copyright 1999-2007 Sun Microsystems, Inc.  All Rights Reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    20  * CA 95054 USA or visit www.sun.com if you need additional information or

    21  * have any questions.

    22  *

    23  */

    25 #include "incls/_precompiled.incl"

    26 #include "incls/_ciSignature.cpp.incl"

    28 // ciSignature

    29 //

    30 // This class represents the signature of a method.

    32 // ------------------------------------------------------------------

    33 // ciSignature::ciSignature

    34 ciSignature::ciSignature(ciKlass* accessing_klass, ciSymbol* symbol) {

    35   ASSERT_IN_VM;

    36   EXCEPTION_CONTEXT;

    37   _accessing_klass = accessing_klass;

    38   _symbol = symbol;

    40   ciEnv* env = CURRENT_ENV;

    41   Arena* arena = env->arena();

    42   _types = new (arena) GrowableArray<ciType*>(arena, 8, 0, NULL);

    44   int size = 0;

    45   int count = 0;

    46   symbolHandle sh (THREAD, symbol->get_symbolOop());

    47   SignatureStream ss(sh);

    48   for (; ; ss.next()) {

    49     // Process one element of the signature

    50     ciType* type;

    51     if (!ss.is_object()) {

    52       type = ciType::make(ss.type());

    53     } else {

    54       symbolOop name = ss.as_symbol(THREAD);

    55       if (HAS_PENDING_EXCEPTION) {

    56         type = ss.is_array() ? (ciType*)ciEnv::unloaded_ciobjarrayklass()

    57           : (ciType*)ciEnv::unloaded_ciinstance_klass();

    58         env->record_out_of_memory_failure();

    59         CLEAR_PENDING_EXCEPTION;

    60       } else {

    61         ciSymbol* klass_name = env->get_object(name)->as_symbol();

    62         type = env->get_klass_by_name_impl(_accessing_klass, klass_name, false);

    63       }

    64     }

    65     _types->append(type);

    66     if (ss.at_return_type()) {

    67       // Done processing the return type; do not add it into the count.

    68       break;

    69     }

    70     size += type->size();

    71     count++;

    72   }

    73   _size = size;

    74   _count = count;

    75 }

    77 // ------------------------------------------------------------------

    78 // ciSignature::return_ciType

    79 //

    80 // What is the return type of this signature?

    81 ciType* ciSignature::return_type() const {

    82   return _types->at(_count);

    83 }

    85 // ------------------------------------------------------------------

    86 // ciSignature::ciType_at

    87 //

    88 // What is the type of the index'th element of this

    89 // signature?

    90 ciType* ciSignature::type_at(int index) const {

    91   assert(index < _count, "out of bounds");

    92   // The first _klasses element holds the return klass.

    93   return _types->at(index);

    94 }

    96 // ------------------------------------------------------------------

    97 // ciSignature::print_signature

    98 void ciSignature::print_signature() {

    99   _symbol->print_symbol();

   100 }

   102 // ------------------------------------------------------------------

   103 // ciSignature::print

   104 void ciSignature::print() {

   105   tty->print("<ciSignature symbol=");

   106   print_signature();

   107  tty->print(" accessing_klass=");

   108   _accessing_klass->print();

   109   tty->print(" address=0x%x>", (address)this);

   110 }

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