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/*
* Copyright (c) 2000, 2022, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*
*/
#ifndef SHARE_OPTO_CALLGENERATOR_HPP
#define SHARE_OPTO_CALLGENERATOR_HPP
#include "compiler/compileBroker.hpp"
#include "opto/callnode.hpp"
#include "opto/compile.hpp"
#include "opto/type.hpp"
#include "runtime/deoptimization.hpp"
//---------------------------CallGenerator-------------------------------------
// The subclasses of this class handle generation of ideal nodes for
// call sites and method entry points.
class CallGenerator : public ArenaObj {
private:
ciMethod* _method; // The method being called.
protected:
CallGenerator(ciMethod* method) : _method(method) {}
void do_late_inline_helper();
virtual bool do_late_inline_check(Compile* C, JVMState* jvms) { ShouldNotReachHere(); return false; }
virtual CallGenerator* inline_cg() const { ShouldNotReachHere(); return NULL; }
virtual bool is_pure_call() const { ShouldNotReachHere(); return false; }
public:
// Accessors
ciMethod* method() const { return _method; }
// is_inline: At least some code implementing the method is copied here.
virtual bool is_inline() const { return false; }
// is_intrinsic: There's a method-specific way of generating the inline code.
virtual bool is_intrinsic() const { return false; }
// is_parse: Bytecodes implementing the specific method are copied here.
virtual bool is_parse() const { return false; }
// is_virtual: The call uses the receiver type to select or check the method.
virtual bool is_virtual() const { return false; }
// is_deferred: The decision whether to inline or not is deferred.
virtual bool is_deferred() const { return false; }
// is_predicated: Uses an explicit check (predicate).
virtual bool is_predicated() const { return false; }
virtual int predicates_count() const { return 0; }
// is_trap: Does not return to the caller. (E.g., uncommon trap.)
virtual bool is_trap() const { return false; }
// does_virtual_dispatch: Should try inlining as normal method first.
virtual bool does_virtual_dispatch() const { return false; }
// is_late_inline: supports conversion of call into an inline
virtual bool is_late_inline() const { return false; }
// same but for method handle calls
virtual bool is_mh_late_inline() const { return false; }
virtual bool is_string_late_inline() const { return false; }
virtual bool is_virtual_late_inline() const { return false; }
// Replace the call with an inline version of the code
virtual void do_late_inline() { ShouldNotReachHere(); }
virtual CallNode* call_node() const { return NULL; }
virtual CallGenerator* with_call_node(CallNode* call) { return this; }
virtual void set_unique_id(jlong id) { fatal("unique id only for late inlines"); };
virtual jlong unique_id() const { fatal("unique id only for late inlines"); return 0; };
virtual void set_callee_method(ciMethod* callee) { ShouldNotReachHere(); }
// Note: It is possible for a CG to be both inline and virtual.
// (The hashCode intrinsic does a vtable check and an inlined fast path.)
// Allocate CallGenerators only in Compile arena since some of them are referenced from CallNodes.
void* operator new(size_t size) throw() {
Compile* C = Compile::current();
return ArenaObj::operator new(size, C->comp_arena());
}
// Utilities:
const TypeFunc* tf() const;
// The given jvms has state and arguments for a call to my method.
// Edges after jvms->argoff() carry all (pre-popped) argument values.
//
// Update the map with state and return values (if any) and return it.
// The return values (0, 1, or 2) must be pushed on the map's stack,
// and the sp of the jvms incremented accordingly.
//
// The jvms is returned on success. Alternatively, a copy of the
// given jvms, suitably updated, may be returned, in which case the
// caller should discard the original jvms.
//
// The non-Parm edges of the returned map will contain updated global state,
// and one or two edges before jvms->sp() will carry any return values.
// Other map edges may contain locals or monitors, and should not
// be changed in meaning.
//
// If the call traps, the returned map must have a control edge of top.
// If the call can throw, the returned map must report has_exceptions().
//
// If the result is NULL, it means that this CallGenerator was unable
// to handle the given call, and another CallGenerator should be consulted.
virtual JVMState* generate(JVMState* jvms) = 0;
// How to generate a call site that is inlined:
static CallGenerator* for_inline(ciMethod* m, float expected_uses = -1);
// How to generate code for an on-stack replacement handler.
static CallGenerator* for_osr(ciMethod* m, int osr_bci);
// How to generate vanilla out-of-line call sites:
static CallGenerator* for_direct_call(ciMethod* m, bool separate_io_projs = false); // static, special
static CallGenerator* for_virtual_call(ciMethod* m, int vtable_index); // virtual, interface
static CallGenerator* for_method_handle_call( JVMState* jvms, ciMethod* caller, ciMethod* callee, bool allow_inline);
static CallGenerator* for_method_handle_inline(JVMState* jvms, ciMethod* caller, ciMethod* callee, bool allow_inline, bool& input_not_const);
// How to generate a replace a direct call with an inline version
static CallGenerator* for_late_inline(ciMethod* m, CallGenerator* inline_cg);
static CallGenerator* for_mh_late_inline(ciMethod* caller, ciMethod* callee, bool input_not_const);
static CallGenerator* for_string_late_inline(ciMethod* m, CallGenerator* inline_cg);
static CallGenerator* for_boxing_late_inline(ciMethod* m, CallGenerator* inline_cg);
static CallGenerator* for_vector_reboxing_late_inline(ciMethod* m, CallGenerator* inline_cg);
static CallGenerator* for_late_inline_virtual(ciMethod* m, int vtable_index, float expected_uses);
// How to make a call that optimistically assumes a receiver type:
static CallGenerator* for_predicted_call(ciKlass* predicted_receiver,
CallGenerator* if_missed,
CallGenerator* if_hit,
float hit_prob);
static CallGenerator* for_guarded_call(ciKlass* predicted_receiver,
CallGenerator* if_missed,
CallGenerator* if_hit);
// How to make a call that optimistically assumes a MethodHandle target:
static CallGenerator* for_predicted_dynamic_call(ciMethodHandle* predicted_method_handle,
CallGenerator* if_missed,
CallGenerator* if_hit,
float hit_prob);
// How to make a call that gives up and goes back to the interpreter:
static CallGenerator* for_uncommon_trap(ciMethod* m,
Deoptimization::DeoptReason reason,
Deoptimization::DeoptAction action);
// Registry for intrinsics:
static CallGenerator* for_intrinsic(ciMethod* m);
static void register_intrinsic(ciMethod* m, CallGenerator* cg);
static CallGenerator* for_predicated_intrinsic(CallGenerator* intrinsic,
CallGenerator* cg);
virtual Node* generate_predicate(JVMState* jvms, int predicate) { return NULL; };
virtual void print_inlining_late(const char* msg) { ShouldNotReachHere(); }
static void print_inlining(Compile* C, ciMethod* callee, int inline_level, int bci, const char* msg) {
if (C->print_inlining()) {
C->print_inlining(callee, inline_level, bci, msg);
}
}
static void print_inlining_failure(Compile* C, ciMethod* callee, int inline_level, int bci, const char* msg) {
print_inlining(C, callee, inline_level, bci, msg);
C->log_inline_failure(msg);
}
static bool is_inlined_method_handle_intrinsic(JVMState* jvms, ciMethod* m);
static bool is_inlined_method_handle_intrinsic(ciMethod* caller, int bci, ciMethod* m);
static bool is_inlined_method_handle_intrinsic(ciMethod* symbolic_info, ciMethod* m);
};
//------------------------InlineCallGenerator----------------------------------
class InlineCallGenerator : public CallGenerator {
protected:
InlineCallGenerator(ciMethod* method) : CallGenerator(method) {}
public:
virtual bool is_inline() const { return true; }
};
#endif // SHARE_OPTO_CALLGENERATOR_HPP
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