/* * Copyright (c) 1997, 2012, 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. * */ #ifndef SHARE_VM_OPTO_COMPILE_HPP #define SHARE_VM_OPTO_COMPILE_HPP #include "asm/codeBuffer.hpp" #include "ci/compilerInterface.hpp" #include "code/debugInfoRec.hpp" #include "code/exceptionHandlerTable.hpp" #include "compiler/compilerOracle.hpp" #include "compiler/compileBroker.hpp" #include "libadt/dict.hpp" #include "libadt/port.hpp" #include "libadt/vectset.hpp" #include "memory/resourceArea.hpp" #include "opto/idealGraphPrinter.hpp" #include "opto/phase.hpp" #include "opto/regmask.hpp" #include "runtime/deoptimization.hpp" #include "runtime/vmThread.hpp" class Block; class Bundle; class C2Compiler; class CallGenerator; class ConnectionGraph; class InlineTree; class Int_Array; class Matcher; class MachConstantNode; class MachConstantBaseNode; class MachNode; class MachOper; class MachSafePointNode; class Node; class Node_Array; class Node_Notes; class OptoReg; class PhaseCFG; class PhaseGVN; class PhaseIterGVN; class PhaseRegAlloc; class PhaseCCP; class PhaseCCP_DCE; class RootNode; class relocInfo; class Scope; class StartNode; class SafePointNode; class JVMState; class TypeData; class TypePtr; class TypeOopPtr; class TypeFunc; class Unique_Node_List; class nmethod; class WarmCallInfo; class Node_Stack; struct Final_Reshape_Counts; //------------------------------Compile---------------------------------------- // This class defines a top-level Compiler invocation. class Compile : public Phase { friend class VMStructs; public: // Fixed alias indexes. (See also MergeMemNode.) enum { AliasIdxTop = 1, // pseudo-index, aliases to nothing (used as sentinel value) AliasIdxBot = 2, // pseudo-index, aliases to everything AliasIdxRaw = 3 // hard-wired index for TypeRawPtr::BOTTOM }; // Variant of TraceTime(NULL, &_t_accumulator, TimeCompiler); // Integrated with logging. If logging is turned on, and dolog is true, // then brackets are put into the log, with time stamps and node counts. // (The time collection itself is always conditionalized on TimeCompiler.) class TracePhase : public TraceTime { private: Compile* C; CompileLog* _log; const char* _phase_name; bool _dolog; public: TracePhase(const char* name, elapsedTimer* accumulator, bool dolog); ~TracePhase(); }; // Information per category of alias (memory slice) class AliasType { private: friend class Compile; int _index; // unique index, used with MergeMemNode const TypePtr* _adr_type; // normalized address type ciField* _field; // relevant instance field, or null if none bool _is_rewritable; // false if the memory is write-once only int _general_index; // if this is type is an instance, the general // type that this is an instance of void Init(int i, const TypePtr* at); public: int index() const { return _index; } const TypePtr* adr_type() const { return _adr_type; } ciField* field() const { return _field; } bool is_rewritable() const { return _is_rewritable; } bool is_volatile() const { return (_field ? _field->is_volatile() : false); } int general_index() const { return (_general_index != 0) ? _general_index : _index; } void set_rewritable(bool z) { _is_rewritable = z; } void set_field(ciField* f) { assert(!_field,""); _field = f; if (f->is_final()) _is_rewritable = false; } void print_on(outputStream* st) PRODUCT_RETURN; }; enum { logAliasCacheSize = 6, AliasCacheSize = (1< _constants; // Constants of this table. int _size; // Size in bytes the emitted constant table takes (including padding). int _table_base_offset; // Offset of the table base that gets added to the constant offsets. int _nof_jump_tables; // Number of jump-tables in this constant table. static int qsort_comparator(Constant* a, Constant* b); // We use negative frequencies to keep the order of the // jump-tables in which they were added. Otherwise we get into // trouble with relocation. float next_jump_table_freq() { return -1.0f * (++_nof_jump_tables); } public: ConstantTable() : _size(-1), _table_base_offset(-1), // We can use -1 here since the constant table is always bigger than 2 bytes (-(size / 2), see MachConstantBaseNode::emit). _nof_jump_tables(0) {} int size() const { assert(_size != -1, "not calculated yet"); return _size; } int calculate_table_base_offset() const; // AD specific void set_table_base_offset(int x) { assert(_table_base_offset == -1 || x == _table_base_offset, "can't change"); _table_base_offset = x; } int table_base_offset() const { assert(_table_base_offset != -1, "not set yet"); return _table_base_offset; } void emit(CodeBuffer& cb); // Returns the offset of the last entry (the top) of the constant table. int top_offset() const { assert(_constants.top().offset() != -1, "not bound yet"); return _constants.top().offset(); } void calculate_offsets_and_size(); int find_offset(Constant& con) const; void add(Constant& con); Constant add(MachConstantNode* n, BasicType type, jvalue value); Constant add(Metadata* metadata); Constant add(MachConstantNode* n, MachOper* oper); Constant add(MachConstantNode* n, jfloat f) { jvalue value; value.f = f; return add(n, T_FLOAT, value); } Constant add(MachConstantNode* n, jdouble d) { jvalue value; value.d = d; return add(n, T_DOUBLE, value); } // Jump-table Constant add_jump_table(MachConstantNode* n); void fill_jump_table(CodeBuffer& cb, MachConstantNode* n, GrowableArray labels) const; }; private: // Fixed parameters to this compilation. const int _compile_id; const bool _save_argument_registers; // save/restore arg regs for trampolines const bool _subsume_loads; // Load can be matched as part of a larger op. const bool _do_escape_analysis; // Do escape analysis. const bool _eliminate_boxing; // Do boxing elimination. ciMethod* _method; // The method being compiled. int _entry_bci; // entry bci for osr methods. const TypeFunc* _tf; // My kind of signature InlineTree* _ilt; // Ditto (temporary). address _stub_function; // VM entry for stub being compiled, or NULL const char* _stub_name; // Name of stub or adapter being compiled, or NULL address _stub_entry_point; // Compile code entry for generated stub, or NULL // Control of this compilation. int _num_loop_opts; // Number of iterations for doing loop optimiztions int _max_inline_size; // Max inline size for this compilation int _freq_inline_size; // Max hot method inline size for this compilation int _fixed_slots; // count of frame slots not allocated by the register // allocator i.e. locks, original deopt pc, etc. // For deopt int _orig_pc_slot; int _orig_pc_slot_offset_in_bytes; int _major_progress; // Count of something big happening bool _inlining_progress; // progress doing incremental inlining? bool _inlining_incrementally;// Are we doing incremental inlining (post parse) bool _has_loops; // True if the method _may_ have some loops bool _has_split_ifs; // True if the method _may_ have some split-if bool _has_unsafe_access; // True if the method _may_ produce faults in unsafe loads or stores. bool _has_stringbuilder; // True StringBuffers or StringBuilders are allocated bool _has_boxed_value; // True if a boxed object is allocated int _max_vector_size; // Maximum size of generated vectors uint _trap_hist[trapHistLength]; // Cumulative traps bool _trap_can_recompile; // Have we emitted a recompiling trap? uint _decompile_count; // Cumulative decompilation counts. bool _do_inlining; // True if we intend to do inlining bool _do_scheduling; // True if we intend to do scheduling bool _do_freq_based_layout; // True if we intend to do frequency based block layout bool _do_count_invocations; // True if we generate code to count invocations bool _do_method_data_update; // True if we generate code to update MethodData*s int _AliasLevel; // Locally-adjusted version of AliasLevel flag. bool _print_assembly; // True if we should dump assembly code for this compilation #ifndef PRODUCT bool _trace_opto_output; bool _parsed_irreducible_loop; // True if ciTypeFlow detected irreducible loops during parsing #endif // JSR 292 bool _has_method_handle_invokes; // True if this method has MethodHandle invokes. // Compilation environment. Arena _comp_arena; // Arena with lifetime equivalent to Compile ciEnv* _env; // CI interface CompileLog* _log; // from CompilerThread const char* _failure_reason; // for record_failure/failing pattern GrowableArray* _intrinsics; // List of intrinsics. GrowableArray* _macro_nodes; // List of nodes which need to be expanded before matching. GrowableArray* _predicate_opaqs; // List of Opaque1 nodes for the loop predicates. GrowableArray* _expensive_nodes; // List of nodes that are expensive to compute and that we'd better not let the GVN freely common ConnectionGraph* _congraph; #ifndef PRODUCT IdealGraphPrinter* _printer; #endif // Node management uint _unique; // Counter for unique Node indices VectorSet _dead_node_list; // Set of dead nodes uint _dead_node_count; // Number of dead nodes; VectorSet::Size() is O(N). // So use this to keep count and make the call O(1). debug_only(static int _debug_idx;) // Monotonic counter (not reset), use -XX:BreakAtNode= Arena _node_arena; // Arena for new-space Nodes Arena _old_arena; // Arena for old-space Nodes, lifetime during xform RootNode* _root; // Unique root of compilation, or NULL after bail-out. Node* _top; // Unique top node. (Reset by various phases.) Node* _immutable_memory; // Initial memory state Node* _recent_alloc_obj; Node* _recent_alloc_ctl; // Constant table ConstantTable _constant_table; // The constant table for this compile. MachConstantBaseNode* _mach_constant_base_node; // Constant table base node singleton. // Blocked array of debugging and profiling information, // tracked per node. enum { _log2_node_notes_block_size = 8, _node_notes_block_size = (1<<_log2_node_notes_block_size) }; GrowableArray* _node_note_array; Node_Notes* _default_node_notes; // default notes for new nodes // After parsing and every bulk phase we hang onto the Root instruction. // The RootNode instruction is where the whole program begins. It produces // the initial Control and BOTTOM for everybody else. // Type management Arena _Compile_types; // Arena for all types Arena* _type_arena; // Alias for _Compile_types except in Initialize_shared() Dict* _type_dict; // Intern table void* _type_hwm; // Last allocation (see Type::operator new/delete) size_t _type_last_size; // Last allocation size (see Type::operator new/delete) ciMethod* _last_tf_m; // Cache for const TypeFunc* _last_tf; // TypeFunc::make AliasType** _alias_types; // List of alias types seen so far. int _num_alias_types; // Logical length of _alias_types int _max_alias_types; // Physical length of _alias_types AliasCacheEntry _alias_cache[AliasCacheSize]; // Gets aliases w/o data structure walking // Parsing, optimization PhaseGVN* _initial_gvn; // Results of parse-time PhaseGVN Unique_Node_List* _for_igvn; // Initial work-list for next round of Iterative GVN WarmCallInfo* _warm_calls; // Sorted work-list for heat-based inlining. GrowableArray _late_inlines; // List of CallGenerators to be revisited after // main parsing has finished. GrowableArray _string_late_inlines; // same but for string operations GrowableArray _boxing_late_inlines; // same but for boxing operations int _late_inlines_pos; // Where in the queue should the next late inlining candidate go (emulate depth first inlining) uint _number_of_mh_late_inlines; // number of method handle late inlining still pending // Inlining may not happen in parse order which would make // PrintInlining output confusing. Keep track of PrintInlining // pieces in order. class PrintInliningBuffer : public ResourceObj { private: CallGenerator* _cg; stringStream* _ss; public: PrintInliningBuffer() : _cg(NULL) { _ss = new stringStream(); } stringStream* ss() const { return _ss; } CallGenerator* cg() const { return _cg; } void set_cg(CallGenerator* cg) { _cg = cg; } }; GrowableArray* _print_inlining_list; int _print_inlining; // Only keep nodes in the expensive node list that need to be optimized void cleanup_expensive_nodes(PhaseIterGVN &igvn); // Use for sorting expensive nodes to bring similar nodes together static int cmp_expensive_nodes(Node** n1, Node** n2); // Expensive nodes list already sorted? bool expensive_nodes_sorted() const; public: outputStream* print_inlining_stream() const { return _print_inlining_list->at(_print_inlining).ss(); } void print_inlining_skip(CallGenerator* cg) { if (PrintInlining) { _print_inlining_list->at(_print_inlining).set_cg(cg); _print_inlining++; _print_inlining_list->insert_before(_print_inlining, PrintInliningBuffer()); } } void print_inlining_insert(CallGenerator* cg) { if (PrintInlining) { for (int i = 0; i < _print_inlining_list->length(); i++) { if (_print_inlining_list->at(i).cg() == cg) { _print_inlining_list->insert_before(i+1, PrintInliningBuffer()); _print_inlining = i+1; _print_inlining_list->at(i).set_cg(NULL); return; } } ShouldNotReachHere(); } } void print_inlining(ciMethod* method, int inline_level, int bci, const char* msg = NULL) { stringStream ss; CompileTask::print_inlining(&ss, method, inline_level, bci, msg); print_inlining_stream()->print(ss.as_string()); } private: // Matching, CFG layout, allocation, code generation PhaseCFG* _cfg; // Results of CFG finding bool _select_24_bit_instr; // We selected an instruction with a 24-bit result bool _in_24_bit_fp_mode; // We are emitting instructions with 24-bit results int _java_calls; // Number of java calls in the method int _inner_loops; // Number of inner loops in the method Matcher* _matcher; // Engine to map ideal to machine instructions PhaseRegAlloc* _regalloc; // Results of register allocation. int _frame_slots; // Size of total frame in stack slots CodeOffsets _code_offsets; // Offsets into the code for various interesting entries RegMask _FIRST_STACK_mask; // All stack slots usable for spills (depends on frame layout) Arena* _indexSet_arena; // control IndexSet allocation within PhaseChaitin void* _indexSet_free_block_list; // free list of IndexSet bit blocks uint _node_bundling_limit; Bundle* _node_bundling_base; // Information for instruction bundling // Instruction bits passed off to the VM int _method_size; // Size of nmethod code segment in bytes CodeBuffer _code_buffer; // Where the code is assembled int _first_block_size; // Size of unvalidated entry point code / OSR poison code ExceptionHandlerTable _handler_table; // Table of native-code exception handlers ImplicitExceptionTable _inc_table; // Table of implicit null checks in native code OopMapSet* _oop_map_set; // Table of oop maps (one for each safepoint location) static int _CompiledZap_count; // counter compared against CompileZap[First/Last] BufferBlob* _scratch_buffer_blob; // For temporary code buffers. relocInfo* _scratch_locs_memory; // For temporary code buffers. int _scratch_const_size; // For temporary code buffers. bool _in_scratch_emit_size; // true when in scratch_emit_size. public: // Accessors // The Compile instance currently active in this (compiler) thread. static Compile* current() { return (Compile*) ciEnv::current()->compiler_data(); } // ID for this compilation. Useful for setting breakpoints in the debugger. int compile_id() const { return _compile_id; } // Does this compilation allow instructions to subsume loads? User // instructions that subsume a load may result in an unschedulable // instruction sequence. bool subsume_loads() const { return _subsume_loads; } /** Do escape analysis. */ bool do_escape_analysis() const { return _do_escape_analysis; } /** Do boxing elimination. */ bool eliminate_boxing() const { return _eliminate_boxing; } /** Do aggressive boxing elimination. */ bool aggressive_unboxing() const { return _eliminate_boxing && AggressiveUnboxing; } bool save_argument_registers() const { return _save_argument_registers; } // Other fixed compilation parameters. ciMethod* method() const { return _method; } int entry_bci() const { return _entry_bci; } bool is_osr_compilation() const { return _entry_bci != InvocationEntryBci; } bool is_method_compilation() const { return (_method != NULL && !_method->flags().is_native()); } const TypeFunc* tf() const { assert(_tf!=NULL, ""); return _tf; } void init_tf(const TypeFunc* tf) { assert(_tf==NULL, ""); _tf = tf; } InlineTree* ilt() const { return _ilt; } address stub_function() const { return _stub_function; } const char* stub_name() const { return _stub_name; } address stub_entry_point() const { return _stub_entry_point; } // Control of this compilation. int fixed_slots() const { assert(_fixed_slots >= 0, ""); return _fixed_slots; } void set_fixed_slots(int n) { _fixed_slots = n; } int major_progress() const { return _major_progress; } void set_inlining_progress(bool z) { _inlining_progress = z; } int inlining_progress() const { return _inlining_progress; } void set_inlining_incrementally(bool z) { _inlining_incrementally = z; } int inlining_incrementally() const { return _inlining_incrementally; } void set_major_progress() { _major_progress++; } void clear_major_progress() { _major_progress = 0; } int num_loop_opts() const { return _num_loop_opts; } void set_num_loop_opts(int n) { _num_loop_opts = n; } int max_inline_size() const { return _max_inline_size; } void set_freq_inline_size(int n) { _freq_inline_size = n; } int freq_inline_size() const { return _freq_inline_size; } void set_max_inline_size(int n) { _max_inline_size = n; } bool has_loops() const { return _has_loops; } void set_has_loops(bool z) { _has_loops = z; } bool has_split_ifs() const { return _has_split_ifs; } void set_has_split_ifs(bool z) { _has_split_ifs = z; } bool has_unsafe_access() const { return _has_unsafe_access; } void set_has_unsafe_access(bool z) { _has_unsafe_access = z; } bool has_stringbuilder() const { return _has_stringbuilder; } void set_has_stringbuilder(bool z) { _has_stringbuilder = z; } bool has_boxed_value() const { return _has_boxed_value; } void set_has_boxed_value(bool z) { _has_boxed_value = z; } int max_vector_size() const { return _max_vector_size; } void set_max_vector_size(int s) { _max_vector_size = s; } void set_trap_count(uint r, uint c) { assert(r < trapHistLength, "oob"); _trap_hist[r] = c; } uint trap_count(uint r) const { assert(r < trapHistLength, "oob"); return _trap_hist[r]; } bool trap_can_recompile() const { return _trap_can_recompile; } void set_trap_can_recompile(bool z) { _trap_can_recompile = z; } uint decompile_count() const { return _decompile_count; } void set_decompile_count(uint c) { _decompile_count = c; } bool allow_range_check_smearing() const; bool do_inlining() const { return _do_inlining; } void set_do_inlining(bool z) { _do_inlining = z; } bool do_scheduling() const { return _do_scheduling; } void set_do_scheduling(bool z) { _do_scheduling = z; } bool do_freq_based_layout() const{ return _do_freq_based_layout; } void set_do_freq_based_layout(bool z){ _do_freq_based_layout = z; } bool do_count_invocations() const{ return _do_count_invocations; } void set_do_count_invocations(bool z){ _do_count_invocations = z; } bool do_method_data_update() const { return _do_method_data_update; } void set_do_method_data_update(bool z) { _do_method_data_update = z; } int AliasLevel() const { return _AliasLevel; } bool print_assembly() const { return _print_assembly; } void set_print_assembly(bool z) { _print_assembly = z; } // check the CompilerOracle for special behaviours for this compile bool method_has_option(const char * option) { return method() != NULL && method()->has_option(option); } #ifndef PRODUCT bool trace_opto_output() const { return _trace_opto_output; } bool parsed_irreducible_loop() const { return _parsed_irreducible_loop; } void set_parsed_irreducible_loop(bool z) { _parsed_irreducible_loop = z; } #endif // JSR 292 bool has_method_handle_invokes() const { return _has_method_handle_invokes; } void set_has_method_handle_invokes(bool z) { _has_method_handle_invokes = z; } void begin_method() { #ifndef PRODUCT if (_printer) _printer->begin_method(this); #endif } void print_method(const char * name, int level = 1) { #ifndef PRODUCT if (_printer) _printer->print_method(this, name, level); #endif } void end_method() { #ifndef PRODUCT if (_printer) _printer->end_method(); #endif } int macro_count() const { return _macro_nodes->length(); } int predicate_count() const { return _predicate_opaqs->length();} int expensive_count() const { return _expensive_nodes->length(); } Node* macro_node(int idx) const { return _macro_nodes->at(idx); } Node* predicate_opaque1_node(int idx) const { return _predicate_opaqs->at(idx);} Node* expensive_node(int idx) const { return _expensive_nodes->at(idx); } ConnectionGraph* congraph() { return _congraph;} void set_congraph(ConnectionGraph* congraph) { _congraph = congraph;} void add_macro_node(Node * n) { //assert(n->is_macro(), "must be a macro node"); assert(!_macro_nodes->contains(n), " duplicate entry in expand list"); _macro_nodes->append(n); } void remove_macro_node(Node * n) { // this function may be called twice for a node so check // that the node is in the array before attempting to remove it if (_macro_nodes->contains(n)) _macro_nodes->remove(n); // remove from _predicate_opaqs list also if it is there if (predicate_count() > 0 && _predicate_opaqs->contains(n)){ _predicate_opaqs->remove(n); } } void add_expensive_node(Node * n); void remove_expensive_node(Node * n) { if (_expensive_nodes->contains(n)) { _expensive_nodes->remove(n); } } void add_predicate_opaq(Node * n) { assert(!_predicate_opaqs->contains(n), " duplicate entry in predicate opaque1"); assert(_macro_nodes->contains(n), "should have already been in macro list"); _predicate_opaqs->append(n); } // remove the opaque nodes that protect the predicates so that the unused checks and // uncommon traps will be eliminated from the graph. void cleanup_loop_predicates(PhaseIterGVN &igvn); bool is_predicate_opaq(Node * n) { return _predicate_opaqs->contains(n); } // Are there candidate expensive nodes for optimization? bool should_optimize_expensive_nodes(PhaseIterGVN &igvn); // Check whether n1 and n2 are similar static int cmp_expensive_nodes(Node* n1, Node* n2); // Sort expensive nodes to locate similar expensive nodes void sort_expensive_nodes(); // Compilation environment. Arena* comp_arena() { return &_comp_arena; } ciEnv* env() const { return _env; } CompileLog* log() const { return _log; } bool failing() const { return _env->failing() || _failure_reason != NULL; } const char* failure_reason() { return _failure_reason; } bool failure_reason_is(const char* r) { return (r==_failure_reason) || (r!=NULL && _failure_reason!=NULL && strcmp(r, _failure_reason)==0); } void record_failure(const char* reason); void record_method_not_compilable(const char* reason, bool all_tiers = false) { // All bailouts cover "all_tiers" when TieredCompilation is off. if (!TieredCompilation) all_tiers = true; env()->record_method_not_compilable(reason, all_tiers); // Record failure reason. record_failure(reason); } void record_method_not_compilable_all_tiers(const char* reason) { record_method_not_compilable(reason, true); } bool check_node_count(uint margin, const char* reason) { if (live_nodes() + margin > (uint)MaxNodeLimit) { record_method_not_compilable(reason); return true; } else { return false; } } // Node management uint unique() const { return _unique; } uint next_unique() { return _unique++; } void set_unique(uint i) { _unique = i; } static int debug_idx() { return debug_only(_debug_idx)+0; } static void set_debug_idx(int i) { debug_only(_debug_idx = i); } Arena* node_arena() { return &_node_arena; } Arena* old_arena() { return &_old_arena; } RootNode* root() const { return _root; } void set_root(RootNode* r) { _root = r; } StartNode* start() const; // (Derived from root.) void init_start(StartNode* s); Node* immutable_memory(); Node* recent_alloc_ctl() const { return _recent_alloc_ctl; } Node* recent_alloc_obj() const { return _recent_alloc_obj; } void set_recent_alloc(Node* ctl, Node* obj) { _recent_alloc_ctl = ctl; _recent_alloc_obj = obj; } void record_dead_node(uint idx) { if (_dead_node_list.test_set(idx)) return; _dead_node_count++; } bool is_dead_node(uint idx) { return _dead_node_list.test(idx) != 0; } uint dead_node_count() { return _dead_node_count; } void reset_dead_node_list() { _dead_node_list.Reset(); _dead_node_count = 0; } uint live_nodes() const { int val = _unique - _dead_node_count; assert (val >= 0, err_msg_res("number of tracked dead nodes %d more than created nodes %d", _unique, _dead_node_count)); return (uint) val; } #ifdef ASSERT uint count_live_nodes_by_graph_walk(); void print_missing_nodes(); #endif // Constant table ConstantTable& constant_table() { return _constant_table; } MachConstantBaseNode* mach_constant_base_node(); bool has_mach_constant_base_node() const { return _mach_constant_base_node != NULL; } // Handy undefined Node Node* top() const { return _top; } // these are used by guys who need to know about creation and transformation of top: Node* cached_top_node() { return _top; } void set_cached_top_node(Node* tn); GrowableArray* node_note_array() const { return _node_note_array; } void set_node_note_array(GrowableArray* arr) { _node_note_array = arr; } Node_Notes* default_node_notes() const { return _default_node_notes; } void set_default_node_notes(Node_Notes* n) { _default_node_notes = n; } Node_Notes* node_notes_at(int idx) { return locate_node_notes(_node_note_array, idx, false); } inline bool set_node_notes_at(int idx, Node_Notes* value); // Copy notes from source to dest, if they exist. // Overwrite dest only if source provides something. // Return true if information was moved. bool copy_node_notes_to(Node* dest, Node* source); // Workhorse function to sort out the blocked Node_Notes array: inline Node_Notes* locate_node_notes(GrowableArray* arr, int idx, bool can_grow = false); void grow_node_notes(GrowableArray* arr, int grow_by); // Type management Arena* type_arena() { return _type_arena; } Dict* type_dict() { return _type_dict; } void* type_hwm() { return _type_hwm; } size_t type_last_size() { return _type_last_size; } int num_alias_types() { return _num_alias_types; } void init_type_arena() { _type_arena = &_Compile_types; } void set_type_arena(Arena* a) { _type_arena = a; } void set_type_dict(Dict* d) { _type_dict = d; } void set_type_hwm(void* p) { _type_hwm = p; } void set_type_last_size(size_t sz) { _type_last_size = sz; } const TypeFunc* last_tf(ciMethod* m) { return (m == _last_tf_m) ? _last_tf : NULL; } void set_last_tf(ciMethod* m, const TypeFunc* tf) { assert(m != NULL || tf == NULL, ""); _last_tf_m = m; _last_tf = tf; } AliasType* alias_type(int idx) { assert(idx < num_alias_types(), "oob"); return _alias_types[idx]; } AliasType* alias_type(const TypePtr* adr_type, ciField* field = NULL) { return find_alias_type(adr_type, false, field); } bool have_alias_type(const TypePtr* adr_type); AliasType* alias_type(ciField* field); int get_alias_index(const TypePtr* at) { return alias_type(at)->index(); } const TypePtr* get_adr_type(uint aidx) { return alias_type(aidx)->adr_type(); } int get_general_index(uint aidx) { return alias_type(aidx)->general_index(); } // Building nodes void rethrow_exceptions(JVMState* jvms); void return_values(JVMState* jvms); JVMState* build_start_state(StartNode* start, const TypeFunc* tf); // Decide how to build a call. // The profile factor is a discount to apply to this site's interp. profile. CallGenerator* call_generator(ciMethod* call_method, int vtable_index, bool call_does_dispatch, JVMState* jvms, bool allow_inline, float profile_factor, bool allow_intrinsics = true, bool delayed_forbidden = false); bool should_delay_inlining(ciMethod* call_method, JVMState* jvms) { return should_delay_string_inlining(call_method, jvms) || should_delay_boxing_inlining(call_method, jvms); } bool should_delay_string_inlining(ciMethod* call_method, JVMState* jvms); bool should_delay_boxing_inlining(ciMethod* call_method, JVMState* jvms); // Helper functions to identify inlining potential at call-site ciMethod* optimize_virtual_call(ciMethod* caller, int bci, ciInstanceKlass* klass, ciMethod* callee, const TypeOopPtr* receiver_type, bool is_virtual, bool &call_does_dispatch, int &vtable_index); ciMethod* optimize_inlining(ciMethod* caller, int bci, ciInstanceKlass* klass, ciMethod* callee, const TypeOopPtr* receiver_type); // Report if there were too many traps at a current method and bci. // Report if a trap was recorded, and/or PerMethodTrapLimit was exceeded. // If there is no MDO at all, report no trap unless told to assume it. bool too_many_traps(ciMethod* method, int bci, Deoptimization::DeoptReason reason); // This version, unspecific to a particular bci, asks if // PerMethodTrapLimit was exceeded for all inlined methods seen so far. bool too_many_traps(Deoptimization::DeoptReason reason, // Privately used parameter for logging: ciMethodData* logmd = NULL); // Report if there were too many recompiles at a method and bci. bool too_many_recompiles(ciMethod* method, int bci, Deoptimization::DeoptReason reason); // Parsing, optimization PhaseGVN* initial_gvn() { return _initial_gvn; } Unique_Node_List* for_igvn() { return _for_igvn; } inline void record_for_igvn(Node* n); // Body is after class Unique_Node_List. void set_initial_gvn(PhaseGVN *gvn) { _initial_gvn = gvn; } void set_for_igvn(Unique_Node_List *for_igvn) { _for_igvn = for_igvn; } // Replace n by nn using initial_gvn, calling hash_delete and // record_for_igvn as needed. void gvn_replace_by(Node* n, Node* nn); void identify_useful_nodes(Unique_Node_List &useful); void update_dead_node_list(Unique_Node_List &useful); void remove_useless_nodes (Unique_Node_List &useful); WarmCallInfo* warm_calls() const { return _warm_calls; } void set_warm_calls(WarmCallInfo* l) { _warm_calls = l; } WarmCallInfo* pop_warm_call(); // Record this CallGenerator for inlining at the end of parsing. void add_late_inline(CallGenerator* cg) { _late_inlines.insert_before(_late_inlines_pos, cg); _late_inlines_pos++; } void prepend_late_inline(CallGenerator* cg) { _late_inlines.insert_before(0, cg); } void add_string_late_inline(CallGenerator* cg) { _string_late_inlines.push(cg); } void add_boxing_late_inline(CallGenerator* cg) { _boxing_late_inlines.push(cg); } void remove_useless_late_inlines(GrowableArray* inlines, Unique_Node_List &useful); void dump_inlining(); bool over_inlining_cutoff() const { if (!inlining_incrementally()) { return unique() > (uint)NodeCountInliningCutoff; } else { return live_nodes() > (uint)LiveNodeCountInliningCutoff; } } void inc_number_of_mh_late_inlines() { _number_of_mh_late_inlines++; } void dec_number_of_mh_late_inlines() { assert(_number_of_mh_late_inlines > 0, "_number_of_mh_late_inlines < 0 !"); _number_of_mh_late_inlines--; } bool has_mh_late_inlines() const { return _number_of_mh_late_inlines > 0; } void inline_incrementally_one(PhaseIterGVN& igvn); void inline_incrementally(PhaseIterGVN& igvn); void inline_string_calls(bool parse_time); void inline_boxing_calls(PhaseIterGVN& igvn); // Matching, CFG layout, allocation, code generation PhaseCFG* cfg() { return _cfg; } bool select_24_bit_instr() const { return _select_24_bit_instr; } bool in_24_bit_fp_mode() const { return _in_24_bit_fp_mode; } bool has_java_calls() const { return _java_calls > 0; } int java_calls() const { return _java_calls; } int inner_loops() const { return _inner_loops; } Matcher* matcher() { return _matcher; } PhaseRegAlloc* regalloc() { return _regalloc; } int frame_slots() const { return _frame_slots; } int frame_size_in_words() const; // frame_slots in units of the polymorphic 'words' RegMask& FIRST_STACK_mask() { return _FIRST_STACK_mask; } Arena* indexSet_arena() { return _indexSet_arena; } void* indexSet_free_block_list() { return _indexSet_free_block_list; } uint node_bundling_limit() { return _node_bundling_limit; } Bundle* node_bundling_base() { return _node_bundling_base; } void set_node_bundling_limit(uint n) { _node_bundling_limit = n; } void set_node_bundling_base(Bundle* b) { _node_bundling_base = b; } bool starts_bundle(const Node *n) const; bool need_stack_bang(int frame_size_in_bytes) const; bool need_register_stack_bang() const; void set_matcher(Matcher* m) { _matcher = m; } //void set_regalloc(PhaseRegAlloc* ra) { _regalloc = ra; } void set_indexSet_arena(Arena* a) { _indexSet_arena = a; } void set_indexSet_free_block_list(void* p) { _indexSet_free_block_list = p; } // Remember if this compilation changes hardware mode to 24-bit precision void set_24_bit_selection_and_mode(bool selection, bool mode) { _select_24_bit_instr = selection; _in_24_bit_fp_mode = mode; } void set_java_calls(int z) { _java_calls = z; } void set_inner_loops(int z) { _inner_loops = z; } // Instruction bits passed off to the VM int code_size() { return _method_size; } CodeBuffer* code_buffer() { return &_code_buffer; } int first_block_size() { return _first_block_size; } void set_frame_complete(int off) { _code_offsets.set_value(CodeOffsets::Frame_Complete, off); } ExceptionHandlerTable* handler_table() { return &_handler_table; } ImplicitExceptionTable* inc_table() { return &_inc_table; } OopMapSet* oop_map_set() { return _oop_map_set; } DebugInformationRecorder* debug_info() { return env()->debug_info(); } Dependencies* dependencies() { return env()->dependencies(); } static int CompiledZap_count() { return _CompiledZap_count; } BufferBlob* scratch_buffer_blob() { return _scratch_buffer_blob; } void init_scratch_buffer_blob(int const_size); void clear_scratch_buffer_blob(); void set_scratch_buffer_blob(BufferBlob* b) { _scratch_buffer_blob = b; } relocInfo* scratch_locs_memory() { return _scratch_locs_memory; } void set_scratch_locs_memory(relocInfo* b) { _scratch_locs_memory = b; } // emit to scratch blob, report resulting size uint scratch_emit_size(const Node* n); void set_in_scratch_emit_size(bool x) { _in_scratch_emit_size = x; } bool in_scratch_emit_size() const { return _in_scratch_emit_size; } enum ScratchBufferBlob { MAX_inst_size = 1024, MAX_locs_size = 128, // number of relocInfo elements MAX_const_size = 128, MAX_stubs_size = 128 }; // Major entry point. Given a Scope, compile the associated method. // For normal compilations, entry_bci is InvocationEntryBci. For on stack // replacement, entry_bci indicates the bytecode for which to compile a // continuation. Compile(ciEnv* ci_env, C2Compiler* compiler, ciMethod* target, int entry_bci, bool subsume_loads, bool do_escape_analysis, bool eliminate_boxing); // Second major entry point. From the TypeFunc signature, generate code // to pass arguments from the Java calling convention to the C calling // convention. Compile(ciEnv* ci_env, const TypeFunc *(*gen)(), address stub_function, const char *stub_name, int is_fancy_jump, bool pass_tls, bool save_arg_registers, bool return_pc); // From the TypeFunc signature, generate code to pass arguments // from Compiled calling convention to Interpreter's calling convention void Generate_Compiled_To_Interpreter_Graph(const TypeFunc *tf, address interpreter_entry); // From the TypeFunc signature, generate code to pass arguments // from Interpreter's calling convention to Compiler's calling convention void Generate_Interpreter_To_Compiled_Graph(const TypeFunc *tf); // Are we compiling a method? bool has_method() { return method() != NULL; } // Maybe print some information about this compile. void print_compile_messages(); // Final graph reshaping, a post-pass after the regular optimizer is done. bool final_graph_reshaping(); // returns true if adr is completely contained in the given alias category bool must_alias(const TypePtr* adr, int alias_idx); // returns true if adr overlaps with the given alias category bool can_alias(const TypePtr* adr, int alias_idx); // Driver for converting compiler's IR into machine code bits void Output(); // Accessors for node bundling info. Bundle* node_bundling(const Node *n); bool valid_bundle_info(const Node *n); // Schedule and Bundle the instructions void ScheduleAndBundle(); // Build OopMaps for each GC point void BuildOopMaps(); // Append debug info for the node "local" at safepoint node "sfpt" to the // "array", May also consult and add to "objs", which describes the // scalar-replaced objects. void FillLocArray( int idx, MachSafePointNode* sfpt, Node *local, GrowableArray *array, GrowableArray *objs ); // If "objs" contains an ObjectValue whose id is "id", returns it, else NULL. static ObjectValue* sv_for_node_id(GrowableArray *objs, int id); // Requres that "objs" does not contains an ObjectValue whose id matches // that of "sv. Appends "sv". static void set_sv_for_object_node(GrowableArray *objs, ObjectValue* sv ); // Process an OopMap Element while emitting nodes void Process_OopMap_Node(MachNode *mach, int code_offset); // Initialize code buffer CodeBuffer* init_buffer(uint* blk_starts); // Write out basic block data to code buffer void fill_buffer(CodeBuffer* cb, uint* blk_starts); // Determine which variable sized branches can be shortened void shorten_branches(uint* blk_starts, int& code_size, int& reloc_size, int& stub_size); // Compute the size of first NumberOfLoopInstrToAlign instructions // at the head of a loop. void compute_loop_first_inst_sizes(); // Compute the information for the exception tables void FillExceptionTables(uint cnt, uint *call_returns, uint *inct_starts, Label *blk_labels); // Stack slots that may be unused by the calling convention but must // otherwise be preserved. On Intel this includes the return address. // On PowerPC it includes the 4 words holding the old TOC & LR glue. uint in_preserve_stack_slots(); // "Top of Stack" slots that may be unused by the calling convention but must // otherwise be preserved. // On Intel these are not necessary and the value can be zero. // On Sparc this describes the words reserved for storing a register window // when an interrupt occurs. static uint out_preserve_stack_slots(); // Number of outgoing stack slots killed above the out_preserve_stack_slots // for calls to C. Supports the var-args backing area for register parms. uint varargs_C_out_slots_killed() const; // Number of Stack Slots consumed by a synchronization entry int sync_stack_slots() const; // Compute the name of old_SP. See .ad for frame layout. OptoReg::Name compute_old_SP(); #ifdef ENABLE_ZAP_DEAD_LOCALS static bool is_node_getting_a_safepoint(Node*); void Insert_zap_nodes(); Node* call_zap_node(MachSafePointNode* n, int block_no); #endif private: // Phase control: void Init(int aliaslevel); // Prepare for a single compilation int Inline_Warm(); // Find more inlining work. void Finish_Warm(); // Give up on further inlines. void Optimize(); // Given a graph, optimize it void Code_Gen(); // Generate code from a graph // Management of the AliasType table. void grow_alias_types(); AliasCacheEntry* probe_alias_cache(const TypePtr* adr_type); const TypePtr *flatten_alias_type(const TypePtr* adr_type) const; AliasType* find_alias_type(const TypePtr* adr_type, bool no_create, ciField* field); void verify_top(Node*) const PRODUCT_RETURN; // Intrinsic setup. void register_library_intrinsics(); // initializer CallGenerator* make_vm_intrinsic(ciMethod* m, bool is_virtual); // constructor int intrinsic_insertion_index(ciMethod* m, bool is_virtual); // helper CallGenerator* find_intrinsic(ciMethod* m, bool is_virtual); // query fn void register_intrinsic(CallGenerator* cg); // update fn #ifndef PRODUCT static juint _intrinsic_hist_count[vmIntrinsics::ID_LIMIT]; static jubyte _intrinsic_hist_flags[vmIntrinsics::ID_LIMIT]; #endif // Function calls made by the public function final_graph_reshaping. // No need to be made public as they are not called elsewhere. void final_graph_reshaping_impl( Node *n, Final_Reshape_Counts &frc); void final_graph_reshaping_walk( Node_Stack &nstack, Node *root, Final_Reshape_Counts &frc ); void eliminate_redundant_card_marks(Node* n); public: // Note: Histogram array size is about 1 Kb. enum { // flag bits: _intrinsic_worked = 1, // succeeded at least once _intrinsic_failed = 2, // tried it but it failed _intrinsic_disabled = 4, // was requested but disabled (e.g., -XX:-InlineUnsafeOps) _intrinsic_virtual = 8, // was seen in the virtual form (rare) _intrinsic_both = 16 // was seen in the non-virtual form (usual) }; // Update histogram. Return boolean if this is a first-time occurrence. static bool gather_intrinsic_statistics(vmIntrinsics::ID id, bool is_virtual, int flags) PRODUCT_RETURN0; static void print_intrinsic_statistics() PRODUCT_RETURN; // Graph verification code // Walk the node list, verifying that there is a one-to-one // correspondence between Use-Def edges and Def-Use edges // The option no_dead_code enables stronger checks that the // graph is strongly connected from root in both directions. void verify_graph_edges(bool no_dead_code = false) PRODUCT_RETURN; // End-of-run dumps. static void print_statistics() PRODUCT_RETURN; // Dump formatted assembly void dump_asm(int *pcs = NULL, uint pc_limit = 0) PRODUCT_RETURN; void dump_pc(int *pcs, int pc_limit, Node *n); // Verify ADLC assumptions during startup static void adlc_verification() PRODUCT_RETURN; // Definitions of pd methods static void pd_compiler2_init(); // Auxiliary method for randomized fuzzing/stressing static bool randomized_select(int count); }; #endif // SHARE_VM_OPTO_COMPILE_HPP