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