1 /*
2 * Copyright (c) 1999, 2010, 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 class CompilationResourceObj;
26 class XHandlers;
27 class ExceptionInfo;
28 class DebugInformationRecorder;
29 class FrameMap;
30 class IR;
31 class IRScope;
32 class Instruction;
33 class LinearScan;
34 class OopMap;
35 class LIR_Emitter;
36 class LIR_Assembler;
37 class CodeEmitInfo;
38 class ciEnv;
39 class ciMethod;
40 class ValueStack;
41 class LIR_OprDesc;
42 class C1_MacroAssembler;
43 class CFGPrinter;
44 typedef LIR_OprDesc* LIR_Opr;
45
46
47 define_array(BasicTypeArray, BasicType)
48 define_stack(BasicTypeList, BasicTypeArray)
49
50 define_array(ExceptionInfoArray, ExceptionInfo*)
51 define_stack(ExceptionInfoList, ExceptionInfoArray)
52
53 class Compilation: public StackObj {
54 friend class CompilationResourceObj;
55 private:
56 // compilation specifics
57 Arena* _arena;
58 int _next_id;
59 int _next_block_id;
60 AbstractCompiler* _compiler;
61 ciEnv* _env;
62 ciMethod* _method;
63 int _osr_bci;
64 IR* _hir;
65 int _max_spills;
66 FrameMap* _frame_map;
67 C1_MacroAssembler* _masm;
68 bool _has_exception_handlers;
69 bool _has_fpu_code;
70 bool _has_unsafe_access;
71 bool _would_profile;
72 bool _has_method_handle_invokes; // True if this method has MethodHandle invokes.
73 const char* _bailout_msg;
74 ExceptionInfoList* _exception_info_list;
75 ExceptionHandlerTable _exception_handler_table;
76 ImplicitExceptionTable _implicit_exception_table;
77 LinearScan* _allocator;
78 CodeOffsets _offsets;
79 CodeBuffer _code;
80
81 // compilation helpers
82 void initialize();
83 void build_hir();
84 void emit_lir();
85
86 void emit_code_epilog(LIR_Assembler* assembler);
87 int emit_code_body();
88
89 int compile_java_method();
90 void install_code(int frame_size);
91 void compile_method();
92
93 void generate_exception_handler_table();
94
95 ExceptionInfoList* exception_info_list() const { return _exception_info_list; }
96 ExceptionHandlerTable* exception_handler_table() { return &_exception_handler_table; }
97
98 LinearScan* allocator() { return _allocator; }
99 void set_allocator(LinearScan* allocator) { _allocator = allocator; }
100
101 Instruction* _current_instruction; // the instruction currently being processed
102 #ifndef PRODUCT
103 Instruction* _last_instruction_printed; // the last instruction printed during traversal
104 #endif // PRODUCT
105
106 public:
107 // creation
108 Compilation(AbstractCompiler* compiler, ciEnv* env, ciMethod* method,
109 int osr_bci, BufferBlob* buffer_blob);
110 ~Compilation();
111
112
113 static Compilation* current() {
114 return (Compilation*) ciEnv::current()->compiler_data();
115 }
116
117 // accessors
118 ciEnv* env() const { return _env; }
119 AbstractCompiler* compiler() const { return _compiler; }
120 bool has_exception_handlers() const { return _has_exception_handlers; }
121 bool has_fpu_code() const { return _has_fpu_code; }
122 bool has_unsafe_access() const { return _has_unsafe_access; }
123 ciMethod* method() const { return _method; }
124 int osr_bci() const { return _osr_bci; }
125 bool is_osr_compile() const { return osr_bci() >= 0; }
126 IR* hir() const { return _hir; }
127 int max_spills() const { return _max_spills; }
128 FrameMap* frame_map() const { return _frame_map; }
129 CodeBuffer* code() { return &_code; }
130 C1_MacroAssembler* masm() const { return _masm; }
131 CodeOffsets* offsets() { return &_offsets; }
132 Arena* arena() { return _arena; }
133
134 // Instruction ids
135 int get_next_id() { return _next_id++; }
136 int number_of_instructions() const { return _next_id; }
137
138 // BlockBegin ids
139 int get_next_block_id() { return _next_block_id++; }
140 int number_of_blocks() const { return _next_block_id; }
141
142 // setters
143 void set_has_exception_handlers(bool f) { _has_exception_handlers = f; }
144 void set_has_fpu_code(bool f) { _has_fpu_code = f; }
145 void set_has_unsafe_access(bool f) { _has_unsafe_access = f; }
146 void set_would_profile(bool f) { _would_profile = f; }
147 // Add a set of exception handlers covering the given PC offset
148 void add_exception_handlers_for_pco(int pco, XHandlers* exception_handlers);
149 // Statistics gathering
150 void notice_inlined_method(ciMethod* method);
151
152 // JSR 292
153 bool has_method_handle_invokes() const { return _has_method_handle_invokes; }
154 void set_has_method_handle_invokes(bool z) { _has_method_handle_invokes = z; }
155
156 DebugInformationRecorder* debug_info_recorder() const; // = _env->debug_info();
157 Dependencies* dependency_recorder() const; // = _env->dependencies()
158 ImplicitExceptionTable* implicit_exception_table() { return &_implicit_exception_table; }
159
160 Instruction* current_instruction() const { return _current_instruction; }
161 Instruction* set_current_instruction(Instruction* instr) {
162 Instruction* previous = _current_instruction;
163 _current_instruction = instr;
164 return previous;
165 }
166
167 #ifndef PRODUCT
168 void maybe_print_current_instruction();
169 #endif // PRODUCT
170
171 // error handling
172 void bailout(const char* msg);
173 bool bailed_out() const { return _bailout_msg != NULL; }
174 const char* bailout_msg() const { return _bailout_msg; }
175
176 static int desired_max_code_buffer_size() {
177 #ifndef PPC
178 return (int) NMethodSizeLimit; // default 256K or 512K
179 #else
180 // conditional branches on PPC are restricted to 16 bit signed
181 return MAX2((unsigned int)NMethodSizeLimit,32*K);
182 #endif
183 }
184 static int desired_max_constant_size() {
185 #ifndef PPC
186 return (int) NMethodSizeLimit / 10; // about 25K
187 #else
188 return (MAX2((unsigned int)NMethodSizeLimit, 32*K)) / 10;
189 #endif
190 }
191
192 static void setup_code_buffer(CodeBuffer* cb, int call_stub_estimate);
193
194 // timers
195 static void print_timers();
196
197 #ifndef PRODUCT
198 // debugging support.
199 // produces a file named c1compileonly in the current directory with
200 // directives to compile only the current method and it's inlines.
201 // The file can be passed to the command line option -XX:Flags=<filename>
202 void compile_only_this_method();
203 void compile_only_this_scope(outputStream* st, IRScope* scope);
204 void exclude_this_method();
205 #endif // PRODUCT
206
207 bool is_profiling() {
208 return env()->comp_level() == CompLevel_full_profile ||
209 env()->comp_level() == CompLevel_limited_profile;
210 }
211 bool count_invocations() { return is_profiling(); }
212 bool count_backedges() { return is_profiling(); }
213
214 // Helpers for generation of profile information
215 bool profile_branches() {
216 return env()->comp_level() == CompLevel_full_profile &&
217 C1UpdateMethodData && C1ProfileBranches;
218 }
219 bool profile_calls() {
220 return env()->comp_level() == CompLevel_full_profile &&
221 C1UpdateMethodData && C1ProfileCalls;
222 }
223 bool profile_inlined_calls() {
224 return profile_calls() && C1ProfileInlinedCalls;
225 }
226 bool profile_checkcasts() {
227 return env()->comp_level() == CompLevel_full_profile &&
228 C1UpdateMethodData && C1ProfileCheckcasts;
229 }
230 };
231
232
233 // Macro definitions for unified bailout-support
234 // The methods bailout() and bailed_out() are present in all classes
235 // that might bailout, but forward all calls to Compilation
236 #define BAILOUT(msg) { bailout(msg); return; }
237 #define BAILOUT_(msg, res) { bailout(msg); return res; }
238
239 #define CHECK_BAILOUT() { if (bailed_out()) return; }
240 #define CHECK_BAILOUT_(res) { if (bailed_out()) return res; }
241
242
243 class InstructionMark: public StackObj {
244 private:
245 Compilation* _compilation;
246 Instruction* _previous;
247
248 public:
249 InstructionMark(Compilation* compilation, Instruction* instr) {
250 _compilation = compilation;
251 _previous = _compilation->set_current_instruction(instr);
252 }
253 ~InstructionMark() {
254 _compilation->set_current_instruction(_previous);
255 }
256 };
257
258
259 //----------------------------------------------------------------------
260 // Base class for objects allocated by the compiler in the compilation arena
261 class CompilationResourceObj ALLOCATION_SUPER_CLASS_SPEC {
262 public:
263 void* operator new(size_t size) { return Compilation::current()->arena()->Amalloc(size); }
264 void* operator new(size_t size, Arena* arena) {
265 return arena->Amalloc(size);
266 }
267 void operator delete(void* p) {} // nothing to do
268 };
269
270
271 //----------------------------------------------------------------------
272 // Class for aggregating exception handler information.
273
274 // Effectively extends XHandlers class with PC offset of
275 // potentially exception-throwing instruction.
276 // This class is used at the end of the compilation to build the
277 // ExceptionHandlerTable.
278 class ExceptionInfo: public CompilationResourceObj {
279 private:
280 int _pco; // PC of potentially exception-throwing instruction
281 XHandlers* _exception_handlers; // flat list of exception handlers covering this PC
282
283 public:
284 ExceptionInfo(int pco, XHandlers* exception_handlers)
285 : _pco(pco)
286 , _exception_handlers(exception_handlers)
287 { }
288
289 int pco() { return _pco; }
290 XHandlers* exception_handlers() { return _exception_handlers; }
291 };