/*
 * Copyright 2010-2021 JetBrains s.r.o. and Kotlin Programming Language contributors.
 * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
 *
 * ASM: a very small and fast Java bytecode manipulation framework
 * Copyright (c) 2000-2011 INRIA, France Telecom
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
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 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the copyright holders nor the names of its
 *    contributors may be used to endorse or promote products derived from
 *    this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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package org.jetbrains.kotlin.codegen.optimization.fixStack

import org.jetbrains.kotlin.codegen.optimization.common.FastAnalyzer
import org.jetbrains.org.objectweb.asm.tree.MethodNode
import org.jetbrains.org.objectweb.asm.tree.analysis.Frame
import org.jetbrains.org.objectweb.asm.tree.analysis.Interpreter
import org.jetbrains.org.objectweb.asm.tree.analysis.Value

// This is a very specific version of method bytecode analyzer that doesn't perform any DFA,
// but infers stack types for reachable instructions instead.
internal open class FastStackAnalyzer<V : Value, F : Frame<V>>(
    owner: String,
    method: MethodNode,
    interpreter: Interpreter<V>,
    newFrame: (Int, Int) -> F
) : FastAnalyzer<V, F>(
    owner, method, interpreter,
    pruneExceptionEdges = false,
    // Don't have to visit the same exception handler multiple times - we care only about stack state at TCB start.
    useFastComputeExceptionHandlers = true,
    useFastMergeControlFlowEdge = true,
    newFrame
)
