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 /*

  * Copyright (c) 1999, 2010, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

  * or visit www.oracle.com if you need additional information or have any

  * questions.

  *

  */

 #include "precompiled.hpp"

 #include "opto/c2compiler.hpp"

 #include "opto/runtime.hpp"

 #ifdef TARGET_ARCH_MODEL_x86_32

 # include "adfiles/ad_x86_32.hpp"

 #endif

 #ifdef TARGET_ARCH_MODEL_x86_64

 # include "adfiles/ad_x86_64.hpp"

 #endif

 #ifdef TARGET_ARCH_MODEL_sparc

 # include "adfiles/ad_sparc.hpp"

 #endif

 #ifdef TARGET_ARCH_MODEL_zero

 # include "adfiles/ad_zero.hpp"

 #endif

 volatile int C2Compiler::_runtimes = uninitialized;

 // register information defined by ADLC

 extern const char register_save_policy[];

 extern const int  register_save_type[];

 const char* C2Compiler::retry_no_subsuming_loads() {

   return "retry without subsuming loads";

 }

 const char* C2Compiler::retry_no_escape_analysis() {

   return "retry without escape analysis";

 }

 void C2Compiler::initialize_runtime() {

   // Check assumptions used while running ADLC

   Compile::adlc_verification();

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

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

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

   }

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

     VMReg r = OptoReg::as_VMReg(i);

     if (r->is_valid()) {

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

     }

   }

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

   bool callee_saved_floats = false;

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

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

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

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

       callee_saved_floats = true;

     }

   }

   DEBUG_ONLY( Node::init_NodeProperty(); )

   Compile::pd_compiler2_init();

   CompilerThread* thread = CompilerThread::current();

   HandleMark  handle_mark(thread);

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

 }

 void C2Compiler::initialize() {

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

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

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

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

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

   // main startup thread.

   if (_runtimes != initialized) {

     initialize_runtimes( initialize_runtime, &_runtimes);

   }

   // Mark this compiler object as ready to roll

   mark_initialized();

 }

 void C2Compiler::compile_method(ciEnv* env,

                                 ciMethod* target,

                                 int entry_bci) {

   if (!is_initialized()) {

     initialize();

   }

   bool subsume_loads = SubsumeLoads;

   bool do_escape_analysis = DoEscapeAnalysis &&

     !env->jvmti_can_access_local_variables();

   while (!env->failing()) {

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

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

     // Check result and retry if appropriate.

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

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

         assert(subsume_loads, "must make progress");

         subsume_loads = false;

         continue;  // retry

       }

       if (C.failure_reason_is(retry_no_escape_analysis())) {

         assert(do_escape_analysis, "must make progress");

         do_escape_analysis = false;

         continue;  // retry

       }

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

       // Note that serious, irreversible failures are already logged

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

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

     }

     if (StressRecompilation) {

       if (subsume_loads) {

         subsume_loads = false;

         continue;  // retry

       }

       if (do_escape_analysis) {

         do_escape_analysis = false;

         continue;  // retry

       }

     }

     // No retry; just break the loop.

     break;

   }

 }

 void C2Compiler::print_timers() {

   // do nothing

 }