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// Copyright 2014 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
import { MINIMUM_EDGE_SEPARATION, Edge } from "../src/edge";
import { NodeLabel } from "./node-label";
import { MAX_RANK_SENTINEL } from "./constants";
import { alignUp, measureText } from "./util";
export const DEFAULT_NODE_BUBBLE_RADIUS = 12;
export const NODE_INPUT_WIDTH = 50;
export const MINIMUM_NODE_OUTPUT_APPROACH = 15;
const MINIMUM_NODE_INPUT_APPROACH = 15 + 2 * DEFAULT_NODE_BUBBLE_RADIUS;
export class GNode {
id: number;
nodeLabel: NodeLabel;
displayLabel: string;
inputs: Array<Edge>;
outputs: Array<Edge>;
visible: boolean;
x: number;
y: number;
rank: number;
outputApproach: number;
cfg: boolean;
labelbbox: { width: number, height: number };
width: number;
normalheight: number;
visitOrderWithinRank: number;
constructor(nodeLabel: NodeLabel) {
this.id = nodeLabel.id;
this.nodeLabel = nodeLabel;
this.displayLabel = nodeLabel.getDisplayLabel();
this.inputs = [];
this.outputs = [];
this.visible = false;
this.x = 0;
this.y = 0;
this.rank = MAX_RANK_SENTINEL;
this.outputApproach = MINIMUM_NODE_OUTPUT_APPROACH;
// Every control node is a CFG node.
this.cfg = nodeLabel.control;
this.labelbbox = measureText(this.displayLabel);
const typebbox = measureText(this.getDisplayType());
const innerwidth = Math.max(this.labelbbox.width, typebbox.width);
this.width = alignUp(innerwidth + NODE_INPUT_WIDTH * 2,
NODE_INPUT_WIDTH);
const innerheight = Math.max(this.labelbbox.height, typebbox.height);
this.normalheight = innerheight + 20;
this.visitOrderWithinRank = 0;
}
isControl() {
return this.nodeLabel.control;
}
isInput() {
return this.nodeLabel.opcode == 'Parameter' || this.nodeLabel.opcode.endsWith('Constant');
}
isLive() {
return this.nodeLabel.live !== false;
}
isJavaScript() {
return this.nodeLabel.opcode.startsWith('JS');
}
isSimplified() {
if (this.isJavaScript()) return false;
const opcode = this.nodeLabel.opcode;
return opcode.endsWith('Phi') ||
opcode.startsWith('Boolean') ||
opcode.startsWith('Number') ||
opcode.startsWith('String') ||
opcode.startsWith('Change') ||
opcode.startsWith('Object') ||
opcode.startsWith('Reference') ||
opcode.startsWith('Any') ||
opcode.endsWith('ToNumber') ||
(opcode == 'AnyToBoolean') ||
(opcode.startsWith('Load') && opcode.length > 4) ||
(opcode.startsWith('Store') && opcode.length > 5);
}
isMachine() {
return !(this.isControl() || this.isInput() ||
this.isJavaScript() || this.isSimplified());
}
getTotalNodeWidth() {
const inputWidth = this.inputs.length * NODE_INPUT_WIDTH;
return Math.max(inputWidth, this.width);
}
getTitle() {
return this.nodeLabel.getTitle();
}
getDisplayLabel() {
return this.nodeLabel.getDisplayLabel();
}
getType() {
return this.nodeLabel.type;
}
getDisplayType() {
let typeString = this.nodeLabel.type;
if (typeString == undefined) return "";
if (typeString.length > 24) {
typeString = typeString.substr(0, 25) + "...";
}
return typeString;
}
deepestInputRank() {
let deepestRank = 0;
this.inputs.forEach(function (e) {
if (e.isVisible() && !e.isBackEdge()) {
if (e.source.rank > deepestRank) {
deepestRank = e.source.rank;
}
}
});
return deepestRank;
}
areAnyOutputsVisible() {
let visibleCount = 0;
this.outputs.forEach(function (e) { if (e.isVisible())++visibleCount; });
if (this.outputs.length == visibleCount) return 2;
if (visibleCount != 0) return 1;
return 0;
}
setOutputVisibility(v) {
let result = false;
this.outputs.forEach(function (e) {
e.visible = v;
if (v) {
if (!e.target.visible) {
e.target.visible = true;
result = true;
}
}
});
return result;
}
setInputVisibility(i, v) {
const edge = this.inputs[i];
edge.visible = v;
if (v) {
if (!edge.source.visible) {
edge.source.visible = true;
return true;
}
}
return false;
}
getInputApproach(index) {
return this.y - MINIMUM_NODE_INPUT_APPROACH -
(index % 4) * MINIMUM_EDGE_SEPARATION - DEFAULT_NODE_BUBBLE_RADIUS;
}
getNodeHeight(showTypes: boolean): number {
if (showTypes) {
return this.normalheight + this.labelbbox.height;
} else {
return this.normalheight;
}
}
getOutputApproach(showTypes: boolean) {
return this.y + this.outputApproach + this.getNodeHeight(showTypes) +
+ DEFAULT_NODE_BUBBLE_RADIUS;
}
getInputX(index) {
const result = this.getTotalNodeWidth() - (NODE_INPUT_WIDTH / 2) +
(index - this.inputs.length + 1) * NODE_INPUT_WIDTH;
return result;
}
getOutputX() {
return this.getTotalNodeWidth() - (NODE_INPUT_WIDTH / 2);
}
hasBackEdges() {
return (this.nodeLabel.opcode == "Loop") ||
((this.nodeLabel.opcode == "Phi" || this.nodeLabel.opcode == "EffectPhi" || this.nodeLabel.opcode == "InductionVariablePhi") &&
this.inputs[this.inputs.length - 1].source.nodeLabel.opcode == "Loop");
}
}
export const nodeToStr = (n: GNode) => "N" + n.id;
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