c2_init_ppc.cpp

/*
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 * Copyright (c) 2012, 2020 SAP SE. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
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 * published by the Free Software Foundation.
 *
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 * 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).
 *
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 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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#include "precompiled.hpp"
#include "opto/compile.hpp"
#include "opto/node.hpp"
#include "runtime/globals.hpp"
#include "runtime/globals_extension.hpp"
#include "runtime/vm_version.hpp"
#include "utilities/debug.hpp"

// Processor dependent initialization of C2 compiler for ppc.

void Compile::pd_compiler2_init() {

  // Power7 and later.
  if (PowerArchitecturePPC64 > 6) {
    if (FLAG_IS_DEFAULT(UsePopCountInstruction)) {
      FLAG_SET_ERGO(UsePopCountInstruction, true);
    }
  }

  if (!VM_Version::has_isel() && FLAG_IS_DEFAULT(ConditionalMoveLimit)) {
    FLAG_SET_ERGO(ConditionalMoveLimit, 0);
  }

  if (OptimizeFill) {
    warning("OptimizeFill is not supported on this CPU.");
    FLAG_SET_DEFAULT(OptimizeFill, false);
  }

}