JDK14/Java14源码在线阅读

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 * Copyright (c) 2005, 2019, Oracle and/or its affiliates. All rights reserved.
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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).
 *
 * 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.
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#ifndef CPU_PPC_C1_LINEARSCAN_PPC_HPP
#define CPU_PPC_C1_LINEARSCAN_PPC_HPP

inline bool LinearScan::is_processed_reg_num(int reg_num) {
  assert(FrameMap::R0_opr->cpu_regnr() == FrameMap::last_cpu_reg() + 1, "wrong assumption below");
  assert(FrameMap::R1_opr->cpu_regnr() == FrameMap::last_cpu_reg() + 2, "wrong assumption below");
  assert(FrameMap::R13_opr->cpu_regnr() == FrameMap::last_cpu_reg() + 3, "wrong assumption below");
  assert(FrameMap::R16_opr->cpu_regnr() == FrameMap::last_cpu_reg() + 4, "wrong assumption below");
  assert(FrameMap::R29_opr->cpu_regnr() == FrameMap::last_cpu_reg() + 5, "wrong assumption below");
  return reg_num <= FrameMap::last_cpu_reg() || reg_num >= pd_nof_cpu_regs_frame_map;
}

inline int LinearScan::num_physical_regs(BasicType type) {
  return 1;
}


inline bool LinearScan::requires_adjacent_regs(BasicType type) {
  return false;
}

inline bool LinearScan::is_caller_save(int assigned_reg) {
  return true; // assigned_reg < pd_first_callee_saved_reg;
}


inline void LinearScan::pd_add_temps(LIR_Op* op) {
  // No special case behaviours yet
}


inline bool LinearScanWalker::pd_init_regs_for_alloc(Interval* cur) {
  if (allocator()->gen()->is_vreg_flag_set(cur->reg_num(), LIRGenerator::callee_saved)) {
    assert(cur->type() != T_FLOAT && cur->type() != T_DOUBLE, "cpu regs only");
    _first_reg = pd_first_callee_saved_reg;
    _last_reg = pd_last_callee_saved_reg;
    ShouldNotReachHere(); // Currently no callee saved regs.
    return true;

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