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