1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/vm/c1/c1_LIRGenerator.hpp Sat Dec 01 00:00:00 2007 +0000
1.3 @@ -0,0 +1,577 @@
1.4 +/*
1.5 + * Copyright 2005-2006 Sun Microsystems, Inc. All Rights Reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
1.23 + * CA 95054 USA or visit www.sun.com if you need additional information or
1.24 + * have any questions.
1.25 + *
1.26 + */
1.27 +
1.28 +// The classes responsible for code emission and register allocation
1.29 +
1.30 +
1.31 +class LIRGenerator;
1.32 +class LIREmitter;
1.33 +class Invoke;
1.34 +class SwitchRange;
1.35 +class LIRItem;
1.36 +
1.37 +define_array(LIRItemArray, LIRItem*)
1.38 +define_stack(LIRItemList, LIRItemArray)
1.39 +
1.40 +class SwitchRange: public CompilationResourceObj {
1.41 + private:
1.42 + int _low_key;
1.43 + int _high_key;
1.44 + BlockBegin* _sux;
1.45 + public:
1.46 + SwitchRange(int start_key, BlockBegin* sux): _low_key(start_key), _high_key(start_key), _sux(sux) {}
1.47 + void set_high_key(int key) { _high_key = key; }
1.48 +
1.49 + int high_key() const { return _high_key; }
1.50 + int low_key() const { return _low_key; }
1.51 + BlockBegin* sux() const { return _sux; }
1.52 +};
1.53 +
1.54 +define_array(SwitchRangeArray, SwitchRange*)
1.55 +define_stack(SwitchRangeList, SwitchRangeArray)
1.56 +
1.57 +
1.58 +class ResolveNode;
1.59 +
1.60 +define_array(NodeArray, ResolveNode*);
1.61 +define_stack(NodeList, NodeArray);
1.62 +
1.63 +
1.64 +// Node objects form a directed graph of LIR_Opr
1.65 +// Edges between Nodes represent moves from one Node to its destinations
1.66 +class ResolveNode: public CompilationResourceObj {
1.67 + private:
1.68 + LIR_Opr _operand; // the source or destinaton
1.69 + NodeList _destinations; // for the operand
1.70 + bool _assigned; // Value assigned to this Node?
1.71 + bool _visited; // Node already visited?
1.72 + bool _start_node; // Start node already visited?
1.73 +
1.74 + public:
1.75 + ResolveNode(LIR_Opr operand)
1.76 + : _operand(operand)
1.77 + , _assigned(false)
1.78 + , _visited(false)
1.79 + , _start_node(false) {};
1.80 +
1.81 + // accessors
1.82 + LIR_Opr operand() const { return _operand; }
1.83 + int no_of_destinations() const { return _destinations.length(); }
1.84 + ResolveNode* destination_at(int i) { return _destinations[i]; }
1.85 + bool assigned() const { return _assigned; }
1.86 + bool visited() const { return _visited; }
1.87 + bool start_node() const { return _start_node; }
1.88 +
1.89 + // modifiers
1.90 + void append(ResolveNode* dest) { _destinations.append(dest); }
1.91 + void set_assigned() { _assigned = true; }
1.92 + void set_visited() { _visited = true; }
1.93 + void set_start_node() { _start_node = true; }
1.94 +};
1.95 +
1.96 +
1.97 +// This is shared state to be used by the PhiResolver so the operand
1.98 +// arrays don't have to be reallocated for reach resolution.
1.99 +class PhiResolverState: public CompilationResourceObj {
1.100 + friend class PhiResolver;
1.101 +
1.102 + private:
1.103 + NodeList _virtual_operands; // Nodes where the operand is a virtual register
1.104 + NodeList _other_operands; // Nodes where the operand is not a virtual register
1.105 + NodeList _vreg_table; // Mapping from virtual register to Node
1.106 +
1.107 + public:
1.108 + PhiResolverState() {}
1.109 +
1.110 + void reset(int max_vregs);
1.111 +};
1.112 +
1.113 +
1.114 +// class used to move value of phi operand to phi function
1.115 +class PhiResolver: public CompilationResourceObj {
1.116 + private:
1.117 + LIRGenerator* _gen;
1.118 + PhiResolverState& _state; // temporary state cached by LIRGenerator
1.119 +
1.120 + ResolveNode* _loop;
1.121 + LIR_Opr _temp;
1.122 +
1.123 + // access to shared state arrays
1.124 + NodeList& virtual_operands() { return _state._virtual_operands; }
1.125 + NodeList& other_operands() { return _state._other_operands; }
1.126 + NodeList& vreg_table() { return _state._vreg_table; }
1.127 +
1.128 + ResolveNode* create_node(LIR_Opr opr, bool source);
1.129 + ResolveNode* source_node(LIR_Opr opr) { return create_node(opr, true); }
1.130 + ResolveNode* destination_node(LIR_Opr opr) { return create_node(opr, false); }
1.131 +
1.132 + void emit_move(LIR_Opr src, LIR_Opr dest);
1.133 + void move_to_temp(LIR_Opr src);
1.134 + void move_temp_to(LIR_Opr dest);
1.135 + void move(ResolveNode* src, ResolveNode* dest);
1.136 +
1.137 + LIRGenerator* gen() {
1.138 + return _gen;
1.139 + }
1.140 +
1.141 + public:
1.142 + PhiResolver(LIRGenerator* _lir_gen, int max_vregs);
1.143 + ~PhiResolver();
1.144 +
1.145 + void move(LIR_Opr src, LIR_Opr dest);
1.146 +};
1.147 +
1.148 +
1.149 +// only the classes below belong in the same file
1.150 +class LIRGenerator: public InstructionVisitor, public BlockClosure {
1.151 + private:
1.152 + Compilation* _compilation;
1.153 + ciMethod* _method; // method that we are compiling
1.154 + PhiResolverState _resolver_state;
1.155 + BlockBegin* _block;
1.156 + int _virtual_register_number;
1.157 + Values _instruction_for_operand;
1.158 + BitMap2D _vreg_flags; // flags which can be set on a per-vreg basis
1.159 + LIR_List* _lir;
1.160 +
1.161 + LIRGenerator* gen() {
1.162 + return this;
1.163 + }
1.164 +
1.165 +#ifdef ASSERT
1.166 + LIR_List* lir(const char * file, int line) const {
1.167 + _lir->set_file_and_line(file, line);
1.168 + return _lir;
1.169 + }
1.170 +#endif
1.171 + LIR_List* lir() const {
1.172 + return _lir;
1.173 + }
1.174 +
1.175 + // a simple cache of constants used within a block
1.176 + GrowableArray<LIR_Const*> _constants;
1.177 + LIR_OprList _reg_for_constants;
1.178 + Values _unpinned_constants;
1.179 +
1.180 + LIR_Const* _card_table_base;
1.181 +
1.182 + friend class PhiResolver;
1.183 +
1.184 + // unified bailout support
1.185 + void bailout(const char* msg) const { compilation()->bailout(msg); }
1.186 + bool bailed_out() const { return compilation()->bailed_out(); }
1.187 +
1.188 + void block_do_prolog(BlockBegin* block);
1.189 + void block_do_epilog(BlockBegin* block);
1.190 +
1.191 + // register allocation
1.192 + LIR_Opr rlock(Value instr); // lock a free register
1.193 + LIR_Opr rlock_result(Value instr);
1.194 + LIR_Opr rlock_result(Value instr, BasicType type);
1.195 + LIR_Opr rlock_byte(BasicType type);
1.196 + LIR_Opr rlock_callee_saved(BasicType type);
1.197 +
1.198 + // get a constant into a register and get track of what register was used
1.199 + LIR_Opr load_constant(Constant* x);
1.200 + LIR_Opr load_constant(LIR_Const* constant);
1.201 +
1.202 + LIR_Const* card_table_base() const { return _card_table_base; }
1.203 +
1.204 + void set_result(Value x, LIR_Opr opr) {
1.205 + assert(opr->is_valid(), "must set to valid value");
1.206 + assert(x->operand()->is_illegal(), "operand should never change");
1.207 + assert(!opr->is_register() || opr->is_virtual(), "should never set result to a physical register");
1.208 + x->set_operand(opr);
1.209 + assert(opr == x->operand(), "must be");
1.210 + if (opr->is_virtual()) {
1.211 + _instruction_for_operand.at_put_grow(opr->vreg_number(), x, NULL);
1.212 + }
1.213 + }
1.214 + void set_no_result(Value x) { assert(!x->has_uses(), "can't have use"); x->clear_operand(); }
1.215 +
1.216 + friend class LIRItem;
1.217 +
1.218 + LIR_Opr round_item(LIR_Opr opr);
1.219 + LIR_Opr force_to_spill(LIR_Opr value, BasicType t);
1.220 +
1.221 + void profile_branch(If* if_instr, If::Condition cond);
1.222 +
1.223 + PhiResolverState& resolver_state() { return _resolver_state; }
1.224 +
1.225 + void move_to_phi(PhiResolver* resolver, Value cur_val, Value sux_val);
1.226 + void move_to_phi(ValueStack* cur_state);
1.227 +
1.228 + // code emission
1.229 + void do_ArithmeticOp_Long (ArithmeticOp* x);
1.230 + void do_ArithmeticOp_Int (ArithmeticOp* x);
1.231 + void do_ArithmeticOp_FPU (ArithmeticOp* x);
1.232 +
1.233 + // platform dependent
1.234 + LIR_Opr getThreadPointer();
1.235 +
1.236 + void do_RegisterFinalizer(Intrinsic* x);
1.237 + void do_getClass(Intrinsic* x);
1.238 + void do_currentThread(Intrinsic* x);
1.239 + void do_MathIntrinsic(Intrinsic* x);
1.240 + void do_ArrayCopy(Intrinsic* x);
1.241 + void do_CompareAndSwap(Intrinsic* x, ValueType* type);
1.242 + void do_AttemptUpdate(Intrinsic* x);
1.243 + void do_NIOCheckIndex(Intrinsic* x);
1.244 + void do_FPIntrinsics(Intrinsic* x);
1.245 +
1.246 + void do_UnsafePrefetch(UnsafePrefetch* x, bool is_store);
1.247 +
1.248 + LIR_Opr call_runtime(BasicTypeArray* signature, LIRItemList* args, address entry, ValueType* result_type, CodeEmitInfo* info);
1.249 + LIR_Opr call_runtime(BasicTypeArray* signature, LIR_OprList* args, address entry, ValueType* result_type, CodeEmitInfo* info);
1.250 +
1.251 + // convenience functions
1.252 + LIR_Opr call_runtime(Value arg1, address entry, ValueType* result_type, CodeEmitInfo* info);
1.253 + LIR_Opr call_runtime(Value arg1, Value arg2, address entry, ValueType* result_type, CodeEmitInfo* info);
1.254 +
1.255 + // GC Barriers
1.256 +
1.257 + // generic interface
1.258 +
1.259 + void post_barrier(LIR_OprDesc* addr, LIR_OprDesc* new_val);
1.260 +
1.261 + // specific implementations
1.262 +
1.263 + // post barriers
1.264 +
1.265 + void CardTableModRef_post_barrier(LIR_OprDesc* addr, LIR_OprDesc* new_val);
1.266 +
1.267 +
1.268 + static LIR_Opr result_register_for(ValueType* type, bool callee = false);
1.269 +
1.270 + ciObject* get_jobject_constant(Value value);
1.271 +
1.272 + LIRItemList* invoke_visit_arguments(Invoke* x);
1.273 + void invoke_load_arguments(Invoke* x, LIRItemList* args, const LIR_OprList* arg_list);
1.274 +
1.275 + void trace_block_entry(BlockBegin* block);
1.276 +
1.277 + // volatile field operations are never patchable because a klass
1.278 + // must be loaded to know it's volatile which means that the offset
1.279 + // it always known as well.
1.280 + void volatile_field_store(LIR_Opr value, LIR_Address* address, CodeEmitInfo* info);
1.281 + void volatile_field_load(LIR_Address* address, LIR_Opr result, CodeEmitInfo* info);
1.282 +
1.283 + void put_Object_unsafe(LIR_Opr src, LIR_Opr offset, LIR_Opr data, BasicType type, bool is_volatile);
1.284 + void get_Object_unsafe(LIR_Opr dest, LIR_Opr src, LIR_Opr offset, BasicType type, bool is_volatile);
1.285 +
1.286 + void arithmetic_call_op (Bytecodes::Code code, LIR_Opr result, LIR_OprList* args);
1.287 +
1.288 + void increment_counter(address counter, int step = 1);
1.289 + void increment_counter(LIR_Address* addr, int step = 1);
1.290 +
1.291 + // increment a counter returning the incremented value
1.292 + LIR_Opr increment_and_return_counter(LIR_Opr base, int offset, int increment);
1.293 +
1.294 + // is_strictfp is only needed for mul and div (and only generates different code on i486)
1.295 + void arithmetic_op(Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, bool is_strictfp, LIR_Opr tmp, CodeEmitInfo* info = NULL);
1.296 + // machine dependent. returns true if it emitted code for the multiply
1.297 + bool strength_reduce_multiply(LIR_Opr left, int constant, LIR_Opr result, LIR_Opr tmp);
1.298 +
1.299 + void store_stack_parameter (LIR_Opr opr, ByteSize offset_from_sp_in_bytes);
1.300 +
1.301 + void jobject2reg_with_patching(LIR_Opr r, ciObject* obj, CodeEmitInfo* info);
1.302 +
1.303 + // this loads the length and compares against the index
1.304 + void array_range_check (LIR_Opr array, LIR_Opr index, CodeEmitInfo* null_check_info, CodeEmitInfo* range_check_info);
1.305 + // For java.nio.Buffer.checkIndex
1.306 + void nio_range_check (LIR_Opr buffer, LIR_Opr index, LIR_Opr result, CodeEmitInfo* info);
1.307 +
1.308 + void arithmetic_op_int (Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, LIR_Opr tmp);
1.309 + void arithmetic_op_long (Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, CodeEmitInfo* info = NULL);
1.310 + void arithmetic_op_fpu (Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, bool is_strictfp, LIR_Opr tmp = LIR_OprFact::illegalOpr);
1.311 +
1.312 + void shift_op (Bytecodes::Code code, LIR_Opr dst_reg, LIR_Opr value, LIR_Opr count, LIR_Opr tmp);
1.313 +
1.314 + void logic_op (Bytecodes::Code code, LIR_Opr dst_reg, LIR_Opr left, LIR_Opr right);
1.315 +
1.316 + void monitor_enter (LIR_Opr object, LIR_Opr lock, LIR_Opr hdr, LIR_Opr scratch, int monitor_no, CodeEmitInfo* info_for_exception, CodeEmitInfo* info);
1.317 + void monitor_exit (LIR_Opr object, LIR_Opr lock, LIR_Opr hdr, int monitor_no);
1.318 +
1.319 + void new_instance (LIR_Opr dst, ciInstanceKlass* klass, LIR_Opr scratch1, LIR_Opr scratch2, LIR_Opr scratch3, LIR_Opr scratch4, LIR_Opr klass_reg, CodeEmitInfo* info);
1.320 +
1.321 + // machine dependent
1.322 + void cmp_mem_int(LIR_Condition condition, LIR_Opr base, int disp, int c, CodeEmitInfo* info);
1.323 + void cmp_reg_mem(LIR_Condition condition, LIR_Opr reg, LIR_Opr base, int disp, BasicType type, CodeEmitInfo* info);
1.324 + void cmp_reg_mem(LIR_Condition condition, LIR_Opr reg, LIR_Opr base, LIR_Opr disp, BasicType type, CodeEmitInfo* info);
1.325 +
1.326 + void arraycopy_helper(Intrinsic* x, int* flags, ciArrayKlass** expected_type);
1.327 +
1.328 + // returns a LIR_Address to address an array location. May also
1.329 + // emit some code as part of address calculation. If
1.330 + // needs_card_mark is true then compute the full address for use by
1.331 + // both the store and the card mark.
1.332 + LIR_Address* generate_address(LIR_Opr base,
1.333 + LIR_Opr index, int shift,
1.334 + int disp,
1.335 + BasicType type);
1.336 + LIR_Address* generate_address(LIR_Opr base, int disp, BasicType type) {
1.337 + return generate_address(base, LIR_OprFact::illegalOpr, 0, disp, type);
1.338 + }
1.339 + LIR_Address* emit_array_address(LIR_Opr array_opr, LIR_Opr index_opr, BasicType type, bool needs_card_mark);
1.340 +
1.341 + // machine preferences and characteristics
1.342 + bool can_inline_as_constant(Value i) const;
1.343 + bool can_inline_as_constant(LIR_Const* c) const;
1.344 + bool can_store_as_constant(Value i, BasicType type) const;
1.345 +
1.346 + LIR_Opr safepoint_poll_register();
1.347 + void increment_invocation_counter(CodeEmitInfo* info, bool backedge = false);
1.348 + void increment_backedge_counter(CodeEmitInfo* info) {
1.349 + increment_invocation_counter(info, true);
1.350 + }
1.351 +
1.352 + CodeEmitInfo* state_for(Instruction* x, ValueStack* state, bool ignore_xhandler = false);
1.353 + CodeEmitInfo* state_for(Instruction* x);
1.354 +
1.355 + // allocates a virtual register for this instruction if
1.356 + // one isn't already allocated. Only for Phi and Local.
1.357 + LIR_Opr operand_for_instruction(Instruction *x);
1.358 +
1.359 + void set_block(BlockBegin* block) { _block = block; }
1.360 +
1.361 + void block_prolog(BlockBegin* block);
1.362 + void block_epilog(BlockBegin* block);
1.363 +
1.364 + void do_root (Instruction* instr);
1.365 + void walk (Instruction* instr);
1.366 +
1.367 + void bind_block_entry(BlockBegin* block);
1.368 + void start_block(BlockBegin* block);
1.369 +
1.370 + LIR_Opr new_register(BasicType type);
1.371 + LIR_Opr new_register(Value value) { return new_register(as_BasicType(value->type())); }
1.372 + LIR_Opr new_register(ValueType* type) { return new_register(as_BasicType(type)); }
1.373 +
1.374 + // returns a register suitable for doing pointer math
1.375 + LIR_Opr new_pointer_register() {
1.376 +#ifdef _LP64
1.377 + return new_register(T_LONG);
1.378 +#else
1.379 + return new_register(T_INT);
1.380 +#endif
1.381 + }
1.382 +
1.383 + static LIR_Condition lir_cond(If::Condition cond) {
1.384 + LIR_Condition l;
1.385 + switch (cond) {
1.386 + case If::eql: l = lir_cond_equal; break;
1.387 + case If::neq: l = lir_cond_notEqual; break;
1.388 + case If::lss: l = lir_cond_less; break;
1.389 + case If::leq: l = lir_cond_lessEqual; break;
1.390 + case If::geq: l = lir_cond_greaterEqual; break;
1.391 + case If::gtr: l = lir_cond_greater; break;
1.392 + };
1.393 + return l;
1.394 + }
1.395 +
1.396 + void init();
1.397 +
1.398 + SwitchRangeArray* create_lookup_ranges(TableSwitch* x);
1.399 + SwitchRangeArray* create_lookup_ranges(LookupSwitch* x);
1.400 + void do_SwitchRanges(SwitchRangeArray* x, LIR_Opr value, BlockBegin* default_sux);
1.401 +
1.402 + public:
1.403 + Compilation* compilation() const { return _compilation; }
1.404 + FrameMap* frame_map() const { return _compilation->frame_map(); }
1.405 + ciMethod* method() const { return _method; }
1.406 + BlockBegin* block() const { return _block; }
1.407 + IRScope* scope() const { return block()->scope(); }
1.408 +
1.409 + int max_virtual_register_number() const { return _virtual_register_number; }
1.410 +
1.411 + void block_do(BlockBegin* block);
1.412 +
1.413 + // Flags that can be set on vregs
1.414 + enum VregFlag {
1.415 + must_start_in_memory = 0 // needs to be assigned a memory location at beginning, but may then be loaded in a register
1.416 + , callee_saved = 1 // must be in a callee saved register
1.417 + , byte_reg = 2 // must be in a byte register
1.418 + , num_vreg_flags
1.419 +
1.420 + };
1.421 +
1.422 + LIRGenerator(Compilation* compilation, ciMethod* method)
1.423 + : _compilation(compilation)
1.424 + , _method(method)
1.425 + , _virtual_register_number(LIR_OprDesc::vreg_base)
1.426 + , _vreg_flags(NULL, 0, num_vreg_flags) {
1.427 + init();
1.428 + }
1.429 +
1.430 + // for virtual registers, maps them back to Phi's or Local's
1.431 + Instruction* instruction_for_opr(LIR_Opr opr);
1.432 + Instruction* instruction_for_vreg(int reg_num);
1.433 +
1.434 + void set_vreg_flag (int vreg_num, VregFlag f);
1.435 + bool is_vreg_flag_set(int vreg_num, VregFlag f);
1.436 + void set_vreg_flag (LIR_Opr opr, VregFlag f) { set_vreg_flag(opr->vreg_number(), f); }
1.437 + bool is_vreg_flag_set(LIR_Opr opr, VregFlag f) { return is_vreg_flag_set(opr->vreg_number(), f); }
1.438 +
1.439 + // statics
1.440 + static LIR_Opr exceptionOopOpr();
1.441 + static LIR_Opr exceptionPcOpr();
1.442 + static LIR_Opr divInOpr();
1.443 + static LIR_Opr divOutOpr();
1.444 + static LIR_Opr remOutOpr();
1.445 + static LIR_Opr shiftCountOpr();
1.446 + LIR_Opr syncTempOpr();
1.447 +
1.448 + // returns a register suitable for saving the thread in a
1.449 + // call_runtime_leaf if one is needed.
1.450 + LIR_Opr getThreadTemp();
1.451 +
1.452 + // visitor functionality
1.453 + virtual void do_Phi (Phi* x);
1.454 + virtual void do_Local (Local* x);
1.455 + virtual void do_Constant (Constant* x);
1.456 + virtual void do_LoadField (LoadField* x);
1.457 + virtual void do_StoreField (StoreField* x);
1.458 + virtual void do_ArrayLength (ArrayLength* x);
1.459 + virtual void do_LoadIndexed (LoadIndexed* x);
1.460 + virtual void do_StoreIndexed (StoreIndexed* x);
1.461 + virtual void do_NegateOp (NegateOp* x);
1.462 + virtual void do_ArithmeticOp (ArithmeticOp* x);
1.463 + virtual void do_ShiftOp (ShiftOp* x);
1.464 + virtual void do_LogicOp (LogicOp* x);
1.465 + virtual void do_CompareOp (CompareOp* x);
1.466 + virtual void do_IfOp (IfOp* x);
1.467 + virtual void do_Convert (Convert* x);
1.468 + virtual void do_NullCheck (NullCheck* x);
1.469 + virtual void do_Invoke (Invoke* x);
1.470 + virtual void do_NewInstance (NewInstance* x);
1.471 + virtual void do_NewTypeArray (NewTypeArray* x);
1.472 + virtual void do_NewObjectArray (NewObjectArray* x);
1.473 + virtual void do_NewMultiArray (NewMultiArray* x);
1.474 + virtual void do_CheckCast (CheckCast* x);
1.475 + virtual void do_InstanceOf (InstanceOf* x);
1.476 + virtual void do_MonitorEnter (MonitorEnter* x);
1.477 + virtual void do_MonitorExit (MonitorExit* x);
1.478 + virtual void do_Intrinsic (Intrinsic* x);
1.479 + virtual void do_BlockBegin (BlockBegin* x);
1.480 + virtual void do_Goto (Goto* x);
1.481 + virtual void do_If (If* x);
1.482 + virtual void do_IfInstanceOf (IfInstanceOf* x);
1.483 + virtual void do_TableSwitch (TableSwitch* x);
1.484 + virtual void do_LookupSwitch (LookupSwitch* x);
1.485 + virtual void do_Return (Return* x);
1.486 + virtual void do_Throw (Throw* x);
1.487 + virtual void do_Base (Base* x);
1.488 + virtual void do_OsrEntry (OsrEntry* x);
1.489 + virtual void do_ExceptionObject(ExceptionObject* x);
1.490 + virtual void do_RoundFP (RoundFP* x);
1.491 + virtual void do_UnsafeGetRaw (UnsafeGetRaw* x);
1.492 + virtual void do_UnsafePutRaw (UnsafePutRaw* x);
1.493 + virtual void do_UnsafeGetObject(UnsafeGetObject* x);
1.494 + virtual void do_UnsafePutObject(UnsafePutObject* x);
1.495 + virtual void do_UnsafePrefetchRead (UnsafePrefetchRead* x);
1.496 + virtual void do_UnsafePrefetchWrite(UnsafePrefetchWrite* x);
1.497 + virtual void do_ProfileCall (ProfileCall* x);
1.498 + virtual void do_ProfileCounter (ProfileCounter* x);
1.499 +};
1.500 +
1.501 +
1.502 +class LIRItem: public CompilationResourceObj {
1.503 + private:
1.504 + Value _value;
1.505 + LIRGenerator* _gen;
1.506 + LIR_Opr _result;
1.507 + bool _destroys_register;
1.508 + LIR_Opr _new_result;
1.509 +
1.510 + LIRGenerator* gen() const { return _gen; }
1.511 +
1.512 + public:
1.513 + LIRItem(Value value, LIRGenerator* gen) {
1.514 + _destroys_register = false;
1.515 + _gen = gen;
1.516 + set_instruction(value);
1.517 + }
1.518 +
1.519 + LIRItem(LIRGenerator* gen) {
1.520 + _destroys_register = false;
1.521 + _gen = gen;
1.522 + _result = LIR_OprFact::illegalOpr;
1.523 + set_instruction(NULL);
1.524 + }
1.525 +
1.526 + void set_instruction(Value value) {
1.527 + _value = value;
1.528 + _result = LIR_OprFact::illegalOpr;
1.529 + if (_value != NULL) {
1.530 + _gen->walk(_value);
1.531 + _result = _value->operand();
1.532 + }
1.533 + _new_result = LIR_OprFact::illegalOpr;
1.534 + }
1.535 +
1.536 + Value value() const { return _value; }
1.537 + ValueType* type() const { return value()->type(); }
1.538 + LIR_Opr result() {
1.539 + assert(!_destroys_register || (!_result->is_register() || _result->is_virtual()),
1.540 + "shouldn't use set_destroys_register with physical regsiters");
1.541 + if (_destroys_register && _result->is_register()) {
1.542 + if (_new_result->is_illegal()) {
1.543 + _new_result = _gen->new_register(type());
1.544 + gen()->lir()->move(_result, _new_result);
1.545 + }
1.546 + return _new_result;
1.547 + } else {
1.548 + return _result;
1.549 + }
1.550 + return _result;
1.551 + }
1.552 +
1.553 + void set_result(LIR_Opr opr);
1.554 +
1.555 + void load_item();
1.556 + void load_byte_item();
1.557 + void load_nonconstant();
1.558 + // load any values which can't be expressed as part of a single store instruction
1.559 + void load_for_store(BasicType store_type);
1.560 + void load_item_force(LIR_Opr reg);
1.561 +
1.562 + void dont_load_item() {
1.563 + // do nothing
1.564 + }
1.565 +
1.566 + void set_destroys_register() {
1.567 + _destroys_register = true;
1.568 + }
1.569 +
1.570 + bool is_constant() const { return value()->as_Constant() != NULL; }
1.571 + bool is_stack() { return result()->is_stack(); }
1.572 + bool is_register() { return result()->is_register(); }
1.573 +
1.574 + ciObject* get_jobject_constant() const;
1.575 + jint get_jint_constant() const;
1.576 + jlong get_jlong_constant() const;
1.577 + jfloat get_jfloat_constant() const;
1.578 + jdouble get_jdouble_constant() const;
1.579 + jint get_address_constant() const;
1.580 +};
