jdk8-mips64-public/hotspot: src/share/vm/opto/c2compiler.cpp@a61af66fc99e

     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/_c2compiler.cpp.incl"

    29 volatile int C2Compiler::_runtimes = uninitialized;

    31 // register information defined by ADLC

    32 extern const char register_save_policy[];

    33 extern const int  register_save_type[];

    35 const char* C2Compiler::retry_no_subsuming_loads() {

    36   return "retry without subsuming loads";

    37 }

    38 void C2Compiler::initialize_runtime() {

    40   // Check assumptions used while running ADLC

    41   Compile::adlc_verification();

    42   assert(REG_COUNT <= ConcreteRegisterImpl::number_of_registers, "incompatible register counts");

    44   for (int i = 0; i < ConcreteRegisterImpl::number_of_registers ; i++ ) {

    45       OptoReg::vm2opto[i] = OptoReg::Bad;

    46   }

    48   for( OptoReg::Name i=OptoReg::Name(0); i<OptoReg::Name(REG_COUNT); i = OptoReg::add(i,1) ) {

    49     VMReg r = OptoReg::as_VMReg(i);

    50     if (r->is_valid()) {

    51       OptoReg::vm2opto[r->value()] = i;

    52     }

    53   }

    55   // Check that runtime and architecture description agree on callee-saved-floats

    56   bool callee_saved_floats = false;

    57   for( OptoReg::Name i=OptoReg::Name(0); i<OptoReg::Name(_last_Mach_Reg); i = OptoReg::add(i,1) ) {

    58     // Is there a callee-saved float or double?

    59     if( register_save_policy[i] == 'E' /* callee-saved */ &&

    60        (register_save_type[i] == Op_RegF || register_save_type[i] == Op_RegD) ) {

    61       callee_saved_floats = true;

    62     }

    63   }

    65   DEBUG_ONLY( Node::init_NodeProperty(); )

    67   Compile::pd_compiler2_init();

    69   CompilerThread* thread = CompilerThread::current();

    71   HandleMark  handle_mark(thread);

    73   OptoRuntime::generate(thread->env());

    75 }

    78 void C2Compiler::initialize() {

    80   // This method can only be called once per C2Compiler object

    81   // The first compiler thread that gets here will initialize the

    82   // small amount of global state (and runtime stubs) that c2 needs.

    84   // There is a race possible once at startup and then we're fine

    86   // Note that this is being called from a compiler thread not the

    87   // main startup thread.

    89   if (_runtimes != initialized) {

    90     initialize_runtimes( initialize_runtime, &_runtimes);

    91   }

    93   // Mark this compiler object as ready to roll

    94   mark_initialized();

    95 }

    97 void C2Compiler::compile_method(ciEnv* env,

    98                                 ciMethod* target,

    99                                 int entry_bci) {

   100   if (!is_initialized()) {

   101     initialize();

   102   }

   103   bool subsume_loads = true;

   104   while (!env->failing()) {

   105     // Attempt to compile while subsuming loads into machine instructions.

   106     Compile C(env, this, target, entry_bci, subsume_loads);

   108     // Check result and retry if appropriate.

   109     if (C.failure_reason() != NULL) {

   110         if (C.failure_reason_is(retry_no_subsuming_loads())) {

   111         assert(subsume_loads, "must make progress");

   112         subsume_loads = false;

   113         continue;  // retry

   114       }

   115       // Pass any other failure reason up to the ciEnv.

   116       // Note that serious, irreversible failures are already logged

   117       // on the ciEnv via env->record_method_not_compilable().

   118       env->record_failure(C.failure_reason());

   119     }

   121     // No retry; just break the loop.

   122     break;

   123   }

   124 }

   127 void C2Compiler::print_timers() {

   128   // do nothing

   129 }

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