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 Optimistic, // Optimistic analysis phase 49 GVN, // Pessimistic global value numbering phase 50 Ins_Select, // Instruction selection phase 51 CFG, // Build a CFG 52 BlockLayout, // Linear ordering of blocks 53 Register_Allocation, // Register allocation, duh 54 LIVE, // Dragon-book LIVE range problem 55 StringOpts, // StringBuilder related optimizations 56 Interference_Graph, // Building the IFG 57 Coalesce, // Coalescing copies 58 Ideal_Loop, // Find idealized trip-counted loops 59 Macro_Expand, // Expand macro nodes 60 Peephole, // Apply peephole optimizations 61 last_phase 62 }; 63 64 enum PhaseTraceId { 65 _t_parser, 66 _t_optimizer, 67 _t_escapeAnalysis, 68 _t_connectionGraph, 69 _t_macroEliminate, 70 _t_iterGVN, 71 _t_incrInline, 72 _t_incrInline_ideal, 73 _t_incrInline_igvn, 74 _t_incrInline_pru, 75 _t_incrInline_inline, 76 _t_idealLoop, 77 _t_idealLoopVerify, 78 _t_ccp, 79 _t_iterGVN2, 80 _t_macroExpand, 81 _t_graphReshaping, 82 _t_matcher, 83 _t_scheduler, 84 _t_registerAllocation, 85 _t_ctorChaitin, 86 _t_buildIFGvirtual, 87 _t_buildIFGphysical, 88 _t_computeLive, 89 _t_regAllocSplit, 90 _t_postAllocCopyRemoval, 91 _t_fixupSpills, 92 _t_chaitinCompact, 93 _t_chaitinCoalesce1, 94 _t_chaitinCoalesce2, 95 _t_chaitinCoalesce3, 96 _t_chaitinCacheLRG, 97 _t_chaitinSimplify, 98 _t_chaitinSelect, 99 _t_blockOrdering, 100 _t_peephole, 101 _t_postalloc_expand, 102 _t_output, 103 _t_instrSched, 104 _t_buildOopMaps, 105 _t_registerMethod, 106 _t_temporaryTimer1, 107 _t_temporaryTimer2, 108 max_phase_timers 109 }; 110 111 static elapsedTimer timers[max_phase_timers]; 112 113 protected: 114 enum PhaseNumber _pnum; // Phase number (for stat gathering) 115 116 static int _total_bytes_compiled; 117 118 // accumulated timers 119 static elapsedTimer _t_totalCompilation; 120 static elapsedTimer _t_methodCompilation; 121 static elapsedTimer _t_stubCompilation; 122 123 // Generate a subtyping check. Takes as input the subtype and supertype. 124 // Returns 2 values: sets the default control() to the true path and 125 // returns the false path. Only reads from constant memory taken from the 126 // default memory; does not write anything. It also doesn't take in an 127 // Object; if you wish to check an Object you need to load the Object's 128 // class prior to coming here. 129 // Used in GraphKit and PhaseMacroExpand 130 static Node* gen_subtype_check(Node* subklass, Node* superklass, Node** ctrl, MergeMemNode* mem, PhaseGVN* gvn); 131 132 public: 133 Compile * C; 134 Phase( PhaseNumber pnum ); 135 136 static void print_timers(); 137 }; 138 139 #endif // SHARE_VM_OPTO_PHASE_HPP