Fri, 01 Jul 2011 10:37:37 -0700
7057120: Tiered: Allow C1 to inline methods with loops
Summary: Recompile the enclosing methods without inlining of the method that has OSRed to level 4 or recompile the enclosing method at level 4.
Reviewed-by: kvn, never
1 /*
2 * Copyright (c) 1999, 2011, 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 */
25 #ifndef SHARE_VM_CI_CIMETHOD_HPP
26 #define SHARE_VM_CI_CIMETHOD_HPP
28 #include "ci/ciFlags.hpp"
29 #include "ci/ciInstanceKlass.hpp"
30 #include "ci/ciObject.hpp"
31 #include "ci/ciSignature.hpp"
32 #include "compiler/methodLiveness.hpp"
33 #include "prims/methodHandles.hpp"
34 #include "utilities/bitMap.hpp"
36 class ciMethodBlocks;
37 class MethodLiveness;
38 class BitMap;
39 class Arena;
40 class BCEscapeAnalyzer;
43 // ciMethod
44 //
45 // This class represents a methodOop in the HotSpot virtual
46 // machine.
47 class ciMethod : public ciObject {
48 friend class CompileBroker;
49 CI_PACKAGE_ACCESS
50 friend class ciEnv;
51 friend class ciExceptionHandlerStream;
52 friend class ciBytecodeStream;
53 friend class ciMethodHandle;
55 private:
56 // General method information.
57 ciFlags _flags;
58 ciSymbol* _name;
59 ciInstanceKlass* _holder;
60 ciSignature* _signature;
61 ciMethodData* _method_data;
62 ciMethodBlocks* _method_blocks;
64 // Code attributes.
65 int _code_size;
66 int _max_stack;
67 int _max_locals;
68 vmIntrinsics::ID _intrinsic_id;
69 int _handler_count;
70 int _interpreter_invocation_count;
71 int _interpreter_throwout_count;
73 bool _uses_monitors;
74 bool _balanced_monitors;
75 bool _is_c1_compilable;
76 bool _is_c2_compilable;
77 bool _can_be_statically_bound;
79 // Lazy fields, filled in on demand
80 address _code;
81 ciExceptionHandler** _exception_handlers;
83 // Optional liveness analyzer.
84 MethodLiveness* _liveness;
85 #if defined(COMPILER2) || defined(SHARK)
86 ciTypeFlow* _flow;
87 BCEscapeAnalyzer* _bcea;
88 #endif
90 ciMethod(methodHandle h_m);
91 ciMethod(ciInstanceKlass* holder, ciSymbol* name, ciSymbol* signature);
93 methodOop get_methodOop() const {
94 methodOop m = (methodOop)get_oop();
95 assert(m != NULL, "illegal use of unloaded method");
96 return m;
97 }
99 oop loader() const { return _holder->loader(); }
101 const char* type_string() { return "ciMethod"; }
103 void print_impl(outputStream* st);
105 void load_code();
107 void check_is_loaded() const { assert(is_loaded(), "not loaded"); }
109 bool ensure_method_data(methodHandle h_m);
111 void code_at_put(int bci, Bytecodes::Code code) {
112 Bytecodes::check(code);
113 assert(0 <= bci && bci < code_size(), "valid bci");
114 address bcp = _code + bci;
115 *bcp = code;
116 }
118 public:
119 // Basic method information.
120 ciFlags flags() const { check_is_loaded(); return _flags; }
121 ciSymbol* name() const { return _name; }
122 ciInstanceKlass* holder() const { return _holder; }
123 ciMethodData* method_data();
124 ciMethodData* method_data_or_null();
126 // Signature information.
127 ciSignature* signature() const { return _signature; }
128 ciType* return_type() const { return _signature->return_type(); }
129 int arg_size_no_receiver() const { return _signature->size(); }
130 // Can only be used on loaded ciMethods
131 int arg_size() const {
132 check_is_loaded();
133 return _signature->size() + (_flags.is_static() ? 0 : 1);
134 }
135 // Report the number of elements on stack when invoking this method.
136 // This is different than the regular arg_size because invokdynamic
137 // has an implicit receiver.
138 int invoke_arg_size(Bytecodes::Code code) const {
139 int arg_size = _signature->size();
140 // Add a receiver argument, maybe:
141 if (code != Bytecodes::_invokestatic &&
142 code != Bytecodes::_invokedynamic) {
143 arg_size++;
144 }
145 return arg_size;
146 }
149 // Method code and related information.
150 address code() { if (_code == NULL) load_code(); return _code; }
151 int code_size() const { check_is_loaded(); return _code_size; }
152 int max_stack() const { check_is_loaded(); return _max_stack; }
153 int max_locals() const { check_is_loaded(); return _max_locals; }
154 vmIntrinsics::ID intrinsic_id() const { check_is_loaded(); return _intrinsic_id; }
155 bool has_exception_handlers() const { check_is_loaded(); return _handler_count > 0; }
156 int exception_table_length() const { check_is_loaded(); return _handler_count; }
157 int interpreter_invocation_count() const { check_is_loaded(); return _interpreter_invocation_count; }
158 int interpreter_throwout_count() const { check_is_loaded(); return _interpreter_throwout_count; }
160 int comp_level();
161 int highest_osr_comp_level();
163 Bytecodes::Code java_code_at_bci(int bci) {
164 address bcp = code() + bci;
165 return Bytecodes::java_code_at(NULL, bcp);
166 }
167 BCEscapeAnalyzer *get_bcea();
168 ciMethodBlocks *get_method_blocks();
170 bool has_linenumber_table() const; // length unknown until decompression
171 u_char* compressed_linenumber_table() const; // not preserved by gc
173 int line_number_from_bci(int bci) const;
175 // Runtime information.
176 int vtable_index();
177 #ifdef SHARK
178 int itable_index();
179 #endif // SHARK
180 address native_entry();
181 address interpreter_entry();
183 // Analysis and profiling.
184 //
185 // Usage note: liveness_at_bci and init_vars should be wrapped in ResourceMarks.
186 bool uses_monitors() const { return _uses_monitors; } // this one should go away, it has a misleading name
187 bool has_monitor_bytecodes() const { return _uses_monitors; }
188 bool has_balanced_monitors();
190 // Returns a bitmap indicating which locals are required to be
191 // maintained as live for deopt. raw_liveness_at_bci is always the
192 // direct output of the liveness computation while liveness_at_bci
193 // may mark all locals as live to improve support for debugging Java
194 // code by maintaining the state of as many locals as possible.
195 MethodLivenessResult raw_liveness_at_bci(int bci);
196 MethodLivenessResult liveness_at_bci(int bci);
198 // Get the interpreters viewpoint on oop liveness. MethodLiveness is
199 // conservative in the sense that it may consider locals to be live which
200 // cannot be live, like in the case where a local could contain an oop or
201 // a primitive along different paths. In that case the local must be
202 // dead when those paths merge. Since the interpreter's viewpoint is
203 // used when gc'ing an interpreter frame we need to use its viewpoint
204 // during OSR when loading the locals.
206 BitMap live_local_oops_at_bci(int bci);
208 #ifdef COMPILER1
209 const BitMap bci_block_start();
210 #endif
212 ciTypeFlow* get_flow_analysis();
213 ciTypeFlow* get_osr_flow_analysis(int osr_bci); // alternate entry point
214 ciCallProfile call_profile_at_bci(int bci);
215 int interpreter_call_site_count(int bci);
217 // Given a certain calling environment, find the monomorphic target
218 // for the call. Return NULL if the call is not monomorphic in
219 // its calling environment.
220 ciMethod* find_monomorphic_target(ciInstanceKlass* caller,
221 ciInstanceKlass* callee_holder,
222 ciInstanceKlass* actual_receiver);
224 // Given a known receiver klass, find the target for the call.
225 // Return NULL if the call has no target or is abstract.
226 ciMethod* resolve_invoke(ciKlass* caller, ciKlass* exact_receiver);
228 // Find the proper vtable index to invoke this method.
229 int resolve_vtable_index(ciKlass* caller, ciKlass* receiver);
231 // Compilation directives
232 bool will_link(ciKlass* accessing_klass,
233 ciKlass* declared_method_holder,
234 Bytecodes::Code bc);
235 bool should_exclude();
236 bool should_inline();
237 bool should_not_inline();
238 bool should_print_assembly();
239 bool break_at_execute();
240 bool has_option(const char *option);
241 bool can_be_compiled();
242 bool can_be_osr_compiled(int entry_bci);
243 void set_not_compilable();
244 bool has_compiled_code();
245 int instructions_size(int comp_level = CompLevel_any);
246 void log_nmethod_identity(xmlStream* log);
247 bool is_not_reached(int bci);
248 bool was_executed_more_than(int times);
249 bool has_unloaded_classes_in_signature();
250 bool is_klass_loaded(int refinfo_index, bool must_be_resolved) const;
251 bool check_call(int refinfo_index, bool is_static) const;
252 bool ensure_method_data(); // make sure it exists in the VM also
253 int scale_count(int count, float prof_factor = 1.); // make MDO count commensurate with IIC
255 // JSR 292 support
256 bool is_method_handle_invoke() const;
257 bool is_method_handle_adapter() const;
258 ciInstance* method_handle_type();
260 // What kind of ciObject is this?
261 bool is_method() { return true; }
263 // Java access flags
264 bool is_public () const { return flags().is_public(); }
265 bool is_private () const { return flags().is_private(); }
266 bool is_protected () const { return flags().is_protected(); }
267 bool is_static () const { return flags().is_static(); }
268 bool is_final () const { return flags().is_final(); }
269 bool is_synchronized() const { return flags().is_synchronized(); }
270 bool is_native () const { return flags().is_native(); }
271 bool is_interface () const { return flags().is_interface(); }
272 bool is_abstract () const { return flags().is_abstract(); }
273 bool is_strict () const { return flags().is_strict(); }
275 // Other flags
276 bool is_empty_method() const;
277 bool is_vanilla_constructor() const;
278 bool is_final_method() const { return is_final() || holder()->is_final(); }
279 bool has_loops () const;
280 bool has_jsrs () const;
281 bool is_accessor () const;
282 bool is_initializer () const;
283 bool can_be_statically_bound() const { return _can_be_statically_bound; }
285 // Print the bytecodes of this method.
286 void print_codes_on(outputStream* st);
287 void print_codes() {
288 print_codes_on(tty);
289 }
290 void print_codes_on(int from, int to, outputStream* st);
292 // Print the name of this method in various incarnations.
293 void print_name(outputStream* st = tty);
294 void print_short_name(outputStream* st = tty);
296 methodOop get_method_handle_target() {
297 KlassHandle receiver_limit; int flags = 0;
298 methodHandle m = MethodHandles::decode_method(get_oop(), receiver_limit, flags);
299 return m();
300 }
301 };
303 #endif // SHARE_VM_CI_CIMETHOD_HPP