dmcallis
65a0592776
Source code drop for the Actionscript virtual machine in the Adobe Flash Player for December 2013
73 lines
2.8 KiB
C++
73 lines
2.8 KiB
C++
/* -*- Mode: C++; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 4 -*- */
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/* vi: set ts=4 sw=4 expandtab: (add to ~/.vimrc: set modeline modelines=5) */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef __avmplus_InvokerCompiler__
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#define __avmplus_InvokerCompiler__
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namespace avmplus
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{
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using namespace nanojit;
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/**
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* compiles MethodEnv::coerceEnter, specialized for the method being
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* called, where the expected arg count and argument types are known. This
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* allows all the arg coersion to be unrolled and specialized.
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*
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* Native methods and JIT methods are compiled in this way. Interpreted
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* methods do not gain enough from compilation since the method bodies are
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* interpreted, and since arguments only need to be coerced, not unboxed.
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*
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* Compilation occurs on the second invocation.
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*/
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class InvokerCompiler: public LirHelper {
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public:
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// true if we are able to compile an invoker for this method
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static bool canCompileInvoker(MethodInfo* info);
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// main compiler driver
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static AtomMethodProc compile(MethodInfo* info);
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private:
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// sets up compiler pipeline
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InvokerCompiler(MethodInfo*);
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// compiler front end; generates LIR
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void generate_lir();
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// compiler back end; generates native code from LIR
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void* assemble();
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// generates argc check
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void emit_argc_check(LIns* argc_param);
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// downcast and unbox (and optionally copy) each arg
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void downcast_args(LIns* env_param, LIns* argc_param, LIns* args_param);
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// downcast and unbox one arg
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void downcast_arg(int arg, int offset, LIns* env_param, LIns* args_param);
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// downcast and unbox the value for the given type and store result in args_out
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void downcast_and_store(LIns* val, Traits* t, LIns* env, int offset);
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// generate code to call the underlying method directly
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void call_method(LIns* env_param, LIns* argc_param);
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// is verbose-mode enabled?
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bool verbose();
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// should unmodified args be copied? true if we are not coercing in-place
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bool copyArgs(); // true if un-modified args must be copied anyway
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private:
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MethodInfo* method; // MethodInfo for method that we will call
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MethodSignaturep ms; // the signature for same
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LIns* maxargs_br; // branch that tests for too many args
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LIns* minargs_br; // branch that tests for not enough args
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LIns* args_out; // separate allocation for outgoing args (optional, NULL if unused)
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};
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}
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#endif /* __avmplus_InvokerCompiler__ */
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