1 /* 2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #ifndef SHARE_VM_OPTO_PHASE_HPP 26 #define SHARE_VM_OPTO_PHASE_HPP 27 28 #include "runtime/timer.hpp" 29 30 class IfNode; 31 class MergeMemNode; 32 class Node; 33 class PhaseGVN; 34 35 //------------------------------Phase------------------------------------------ 36 // Most optimizations are done in Phases. Creating a phase does any long 37 // running analysis required, and caches the analysis in internal data 38 // structures. Later the analysis is queried using transform() calls to 39 // guide transforming the program. When the Phase is deleted, so is any 40 // cached analysis info. This basic Phase class mostly contains timing and 41 // memory management code. 42 class Phase : public StackObj { 43 public: 44 enum PhaseNumber { 45 Compiler, // Top-level compiler phase 46 Parser, // Parse bytecodes 47 Remove_Useless, // Remove useless nodes 48 Remove_Useless_And_Renumber_Live, // First, remove useless nodes from the graph. Then, renumber live nodes. 49 Optimistic, // Optimistic analysis phase 50 GVN, // Pessimistic global value numbering phase 51 Ins_Select, // Instruction selection phase 52 CFG, // Build a CFG 53 BlockLayout, // Linear ordering of blocks 54 Register_Allocation, // Register allocation, duh 55 LIVE, // Dragon-book LIVE range problem 56 StringOpts, // StringBuilder related optimizations 57 Interference_Graph, // Building the IFG 58 Coalesce, // Coalescing copies 59 Ideal_Loop, // Find idealized trip-counted loops 60 Macro_Expand, // Expand macro nodes 61 Peephole, // Apply peephole optimizations 62 last_phase 63 }; 64 65 enum PhaseTraceId { 66 _t_parser, 67 _t_optimizer, 68 _t_escapeAnalysis, 69 _t_connectionGraph, 70 _t_macroEliminate, 71 _t_iterGVN, 72 _t_incrInline, 73 _t_incrInline_ideal, 74 _t_incrInline_igvn, 75 _t_incrInline_pru, 76 _t_incrInline_inline, 77 _t_renumberLive, 78 _t_idealLoop, 79 _t_idealLoopVerify, 80 _t_ccp, 81 _t_iterGVN2, 82 _t_macroExpand, 83 _t_graphReshaping, 84 _t_matcher, 85 _t_scheduler, 86 _t_registerAllocation, 87 _t_ctorChaitin, 88 _t_buildIFGvirtual, 89 _t_buildIFGphysical, 90 _t_computeLive, 91 _t_regAllocSplit, 92 _t_postAllocCopyRemoval, 93 _t_mergeMultidefs, 94 _t_fixupSpills, 95 _t_chaitinCompact, 96 _t_chaitinCoalesce1, 97 _t_chaitinCoalesce2, 98 _t_chaitinCoalesce3, 99 _t_chaitinCacheLRG, 100 _t_chaitinSimplify, 101 _t_chaitinSelect, 102 _t_blockOrdering, 103 _t_peephole, 104 _t_postalloc_expand, 105 _t_output, 106 _t_instrSched, 107 _t_buildOopMaps, 108 _t_registerMethod, 109 _t_temporaryTimer1, 110 _t_temporaryTimer2, 111 max_phase_timers 112 }; 113 114 static elapsedTimer timers[max_phase_timers]; 115 116 protected: 117 enum PhaseNumber _pnum; // Phase number (for stat gathering) 118 119 static int _total_bytes_compiled; 120 121 // accumulated timers 122 static elapsedTimer _t_totalCompilation; 123 static elapsedTimer _t_methodCompilation; 124 static elapsedTimer _t_stubCompilation; 125 126 // Generate a subtyping check. Takes as input the subtype and supertype. 127 // Returns 2 values: sets the default control() to the true path and 128 // returns the false path. Only reads from constant memory taken from the 129 // default memory; does not write anything. It also doesn't take in an 130 // Object; if you wish to check an Object you need to load the Object's 131 // class prior to coming here. 132 // Used in GraphKit and PhaseMacroExpand 133 static Node* gen_subtype_check(Node* subklass, Node* superklass, Node** ctrl, MergeMemNode* mem, PhaseGVN* gvn); 134 135 public: 136 Compile * C; 137 Phase( PhaseNumber pnum ); 138 139 static void print_timers(); 140 }; 141 142 #endif // SHARE_VM_OPTO_PHASE_HPP