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/*
* Copyright (C) 2016 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 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.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
"use strict";
class BasicBlock {
constructor(index, frequency)
{
this._index = index;
this._frequency = frequency;
this._insts = [];
this._successors = [];
this._predecessors = [];
}
get index() { return this._index; }
get size() { return this._insts.length; }
[Symbol.iterator]()
{
return this._insts[Symbol.iterator]();
}
at(index)
{
if (index >= this._insts.length)
throw new Error("Out of bounds access");
return this._insts[index];
}
get(index)
{
if (index < 0 || index >= this._insts.length)
return null;
return this._insts[index];
}
get last()
{
return this._insts[this._insts.length - 1];
}
get insts() { return this._insts; }
append(inst) { this._insts.push(inst); }
get numSuccessors() { return this._successors.length; }
successor(index) { return this._successors[index]; }
get successors() { return this._successors; }
successorBlock(index) { return this._successors[index].block; }
get successorBlocks()
{
return new Proxy(this._successors, {
get(target, property) {
if (typeof property == "string"
&& (property | 0) == property)
return target[property].block;
return target[property];
},
set(target, property, value) {
if (typeof property == "string"
&& (property | 0) == property) {
var oldValue = target[property];
target[property] = new FrequentedBlock(
value, oldValue ? oldValue.frequency : Normal);
return;
}
target[property] = value;
}
});
}
get numPredecessors() { return this._predecessors.length; }
predecessor(index) { return this._predecessors[index]; }
get predecessors() { return this._predecessors; }
get frequency() { return this._frequency; }
toString()
{
return "#" + this._index;
}
get headerString()
{
let result = "";
result += `BB${this}: ; frequency = ${this._frequency}\n`;
if (this._predecessors.length)
result += " Predecessors: " + this._predecessors.join(", ") + "\n";
return result;
}
get footerString()
{
let result = "";
if (this._successors.length)
result += " Successors: " + this._successors.join(", ") + "\n";
return result;
}
toStringDeep()
{
let result = "";
result += this.headerString;
for (let inst of this)
result += ` ${inst}\n`;
result += this.footerString;
return result;
}
}