author | trims |
Thu, 27 May 2010 19:08:38 -0700 | |
changeset 5547 | f4b087cbb361 |
parent 1 | 489c9b5090e2 |
child 5702 | 201c5cde25bb |
permissions | -rw-r--r-- |
1 | 1 |
/* |
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* Copyright (c) 2000, 2006, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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* |
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*/ |
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class ciMethod; |
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class CallingConvention; |
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class BasicTypeArray; |
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class BasicTypeList; |
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//-------------------------------------------------------- |
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// FrameMap |
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//-------------------------------------------------------- |
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// This class is responsible of mapping items (locals, monitors, spill |
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// slots and registers to their frame location |
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// |
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// The monitors are specified by a consecutive index, although each monitor entry |
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// occupies two words. The monitor_index is 0.._num_monitors |
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// The spill index is similar to local index; it is in range 0..(open) |
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// |
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// The CPU registers are mapped using a fixed table; register with number 0 |
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// is the most used one. |
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// stack grow direction --> SP |
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// +----------+---+----------+-------+------------------------+-----+ |
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// |arguments | x | monitors | spill | reserved argument area | ABI | |
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// +----------+---+----------+-------+------------------------+-----+ |
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// |
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// x = ABI area (SPARC) or return adress and link (i486) |
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// ABI = ABI area (SPARC) or nothing (i486) |
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class LIR_OprDesc; |
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typedef LIR_OprDesc* LIR_Opr; |
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class FrameMap : public CompilationResourceObj { |
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public: |
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enum { |
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nof_cpu_regs = pd_nof_cpu_regs_frame_map, |
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nof_fpu_regs = pd_nof_fpu_regs_frame_map, |
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nof_cpu_regs_reg_alloc = pd_nof_cpu_regs_reg_alloc, |
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nof_fpu_regs_reg_alloc = pd_nof_fpu_regs_reg_alloc, |
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nof_caller_save_cpu_regs = pd_nof_caller_save_cpu_regs_frame_map, |
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nof_caller_save_fpu_regs = pd_nof_caller_save_fpu_regs_frame_map, |
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spill_slot_size_in_bytes = 4 |
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}; |
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# include "incls/_c1_FrameMap_pd.hpp.incl" // platform dependent declarations |
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friend class LIR_OprDesc; |
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private: |
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static bool _init_done; |
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static Register _cpu_rnr2reg [nof_cpu_regs]; |
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static int _cpu_reg2rnr [nof_cpu_regs]; |
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static LIR_Opr _caller_save_cpu_regs [nof_caller_save_cpu_regs]; |
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static LIR_Opr _caller_save_fpu_regs [nof_caller_save_fpu_regs]; |
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int _framesize; |
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int _argcount; |
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int _num_monitors; |
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int _num_spills; |
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int _reserved_argument_area_size; |
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int _oop_map_arg_count; |
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CallingConvention* _incoming_arguments; |
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intArray* _argument_locations; |
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void check_spill_index (int spill_index) const { assert(spill_index >= 0, "bad index"); } |
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void check_monitor_index (int monitor_index) const { assert(monitor_index >= 0 && |
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monitor_index < _num_monitors, "bad index"); } |
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static Register cpu_rnr2reg (int rnr) { |
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assert(_init_done, "tables not initialized"); |
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debug_only(cpu_range_check(rnr);) |
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return _cpu_rnr2reg[rnr]; |
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} |
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static int cpu_reg2rnr (Register reg) { |
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assert(_init_done, "tables not initialized"); |
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debug_only(cpu_range_check(reg->encoding());) |
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return _cpu_reg2rnr[reg->encoding()]; |
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} |
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static void map_register(int rnr, Register reg) { |
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debug_only(cpu_range_check(rnr);) |
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debug_only(cpu_range_check(reg->encoding());) |
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_cpu_rnr2reg[rnr] = reg; |
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_cpu_reg2rnr[reg->encoding()] = rnr; |
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} |
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void update_reserved_argument_area_size (int size) { |
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assert(size >= 0, "check"); |
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_reserved_argument_area_size = MAX2(_reserved_argument_area_size, size); |
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} |
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protected: |
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#ifndef PRODUCT |
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static void cpu_range_check (int rnr) { assert(0 <= rnr && rnr < nof_cpu_regs, "cpu register number is too big"); } |
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static void fpu_range_check (int rnr) { assert(0 <= rnr && rnr < nof_fpu_regs, "fpu register number is too big"); } |
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#endif |
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ByteSize sp_offset_for_monitor_base(const int idx) const; |
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Address make_new_address(ByteSize sp_offset) const; |
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ByteSize sp_offset_for_slot(const int idx) const; |
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ByteSize sp_offset_for_double_slot(const int idx) const; |
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ByteSize sp_offset_for_spill(const int idx) const; |
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ByteSize sp_offset_for_monitor_lock(int monitor_index) const; |
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ByteSize sp_offset_for_monitor_object(int monitor_index) const; |
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VMReg sp_offset2vmreg(ByteSize offset) const; |
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// platform dependent hook used to check that frame is properly |
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// addressable on the platform. Used by sparc to verify that all |
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// stack addresses are expressable in a simm13. |
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bool validate_frame(); |
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static LIR_Opr map_to_opr(BasicType type, VMRegPair* reg, bool incoming); |
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public: |
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// Opr representing the stack_pointer on this platform |
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static LIR_Opr stack_pointer(); |
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static BasicTypeArray* signature_type_array_for(const ciMethod* method); |
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static BasicTypeArray* signature_type_array_for(const char * signature); |
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// for outgoing calls, these also update the reserved area to |
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// include space for arguments and any ABI area. |
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CallingConvention* c_calling_convention (const BasicTypeArray* signature); |
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CallingConvention* java_calling_convention (const BasicTypeArray* signature, bool outgoing); |
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// deopt support |
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ByteSize sp_offset_for_orig_pc() { return sp_offset_for_monitor_base(_num_monitors); } |
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static LIR_Opr as_opr(Register r) { |
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return LIR_OprFact::single_cpu(cpu_reg2rnr(r)); |
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} |
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static LIR_Opr as_oop_opr(Register r) { |
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return LIR_OprFact::single_cpu_oop(cpu_reg2rnr(r)); |
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} |
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FrameMap(ciMethod* method, int monitors, int reserved_argument_area_size); |
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bool finalize_frame(int nof_slots); |
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int reserved_argument_area_size () const { return _reserved_argument_area_size; } |
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int framesize () const { assert(_framesize != -1, "hasn't been calculated"); return _framesize; } |
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ByteSize framesize_in_bytes () const { return in_ByteSize(framesize() * 4); } |
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int num_monitors () const { return _num_monitors; } |
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int num_spills () const { assert(_num_spills >= 0, "not set"); return _num_spills; } |
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int argcount () const { assert(_argcount >= 0, "not set"); return _argcount; } |
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int oop_map_arg_count() const { return _oop_map_arg_count; } |
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CallingConvention* incoming_arguments() const { return _incoming_arguments; } |
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// convenience routines |
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Address address_for_slot(int index, int sp_adjust = 0) const { |
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return make_new_address(sp_offset_for_slot(index) + in_ByteSize(sp_adjust)); |
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} |
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Address address_for_double_slot(int index, int sp_adjust = 0) const { |
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return make_new_address(sp_offset_for_double_slot(index) + in_ByteSize(sp_adjust)); |
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} |
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Address address_for_monitor_lock(int monitor_index) const { |
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return make_new_address(sp_offset_for_monitor_lock(monitor_index)); |
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} |
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Address address_for_monitor_object(int monitor_index) const { |
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return make_new_address(sp_offset_for_monitor_object(monitor_index)); |
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} |
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void print_frame_layout() const; |
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// Creates Location describing desired slot and returns it via pointer |
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// to Location object. Returns true if the stack frame offset was legal |
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// (as defined by Location::legal_offset_in_bytes()), false otherwise. |
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// Do not use the returned location if this returns false. |
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bool location_for_sp_offset(ByteSize byte_offset_from_sp, |
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Location::Type loc_type, Location* loc) const; |
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bool location_for_monitor_lock (int monitor_index, Location* loc) const { |
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return location_for_sp_offset(sp_offset_for_monitor_lock(monitor_index), Location::normal, loc); |
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} |
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bool location_for_monitor_object(int monitor_index, Location* loc) const { |
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return location_for_sp_offset(sp_offset_for_monitor_object(monitor_index), Location::oop, loc); |
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} |
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bool locations_for_slot (int index, Location::Type loc_type, |
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Location* loc, Location* second = NULL) const; |
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VMReg slot_regname(int index) const { |
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return sp_offset2vmreg(sp_offset_for_slot(index)); |
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} |
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VMReg monitor_object_regname(int monitor_index) const { |
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return sp_offset2vmreg(sp_offset_for_monitor_object(monitor_index)); |
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} |
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VMReg regname(LIR_Opr opr) const; |
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static LIR_Opr caller_save_cpu_reg_at(int i) { |
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assert(i >= 0 && i < nof_caller_save_cpu_regs, "out of bounds"); |
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return _caller_save_cpu_regs[i]; |
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} |
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static LIR_Opr caller_save_fpu_reg_at(int i) { |
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assert(i >= 0 && i < nof_caller_save_fpu_regs, "out of bounds"); |
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return _caller_save_fpu_regs[i]; |
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} |
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static void init(); |
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}; |
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// CallingConvention |
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//-------------------------------------------------------- |
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class CallingConvention: public ResourceObj { |
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private: |
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LIR_OprList* _args; |
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int _reserved_stack_slots; |
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public: |
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CallingConvention (LIR_OprList* args, int reserved_stack_slots) |
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: _args(args) |
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, _reserved_stack_slots(reserved_stack_slots) {} |
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LIR_OprList* args() { return _args; } |
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LIR_Opr at(int i) const { return _args->at(i); } |
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int length() const { return _args->length(); } |
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// Indicates number of real frame slots used by arguments passed on stack. |
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int reserved_stack_slots() const { return _reserved_stack_slots; } |
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#ifndef PRODUCT |
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void print () const { |
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for (int i = 0; i < length(); i++) { |
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at(i)->print(); |
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} |
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} |
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#endif // PRODUCT |
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}; |