Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 1 | // Copyright 2014 the V8 project authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | var DEFAULT_NODE_WIDTH = 240; |
| 6 | var DEFAULT_NODE_HEIGHT = 40; |
| 7 | var TYPE_HEIGHT = 25; |
| 8 | var DEFAULT_NODE_BUBBLE_RADIUS = 4; |
| 9 | var NODE_INPUT_WIDTH = 20; |
| 10 | var MINIMUM_NODE_INPUT_APPROACH = 20; |
| 11 | var MINIMUM_NODE_OUTPUT_APPROACH = 15; |
| 12 | |
| 13 | function isNodeInitiallyVisible(node) { |
| 14 | return node.cfg; |
| 15 | } |
| 16 | |
| 17 | var Node = { |
| 18 | isControl: function() { |
| 19 | return this.control; |
| 20 | }, |
| 21 | isInput: function() { |
| 22 | return this.opcode == 'Parameter' || this.opcode.endsWith('Constant'); |
| 23 | }, |
| 24 | isJavaScript: function() { |
| 25 | return this.opcode.startsWith('JS'); |
| 26 | }, |
| 27 | isSimplified: function() { |
| 28 | if (this.isJavaScript) return false; |
| 29 | return this.opcode.endsWith('Phi') || |
| 30 | this.opcode.startsWith('Boolean') || |
| 31 | this.opcode.startsWith('Number') || |
| 32 | this.opcode.startsWith('String') || |
| 33 | this.opcode.startsWith('Change') || |
| 34 | this.opcode.startsWith('Object') || |
| 35 | this.opcode.startsWith('Reference') || |
| 36 | this.opcode.startsWith('Any') || |
| 37 | this.opcode.endsWith('ToNumber') || |
| 38 | (this.opcode == 'AnyToBoolean') || |
| 39 | (this.opcode.startsWith('Load') && this.opcode.length > 4) || |
| 40 | (this.opcode.startsWith('Store') && this.opcode.length > 5); |
| 41 | }, |
| 42 | isMachine: function() { |
| 43 | return !(this.isControl() || this.isInput() || |
| 44 | this.isJavaScript() || this.isSimplified()); |
| 45 | }, |
| 46 | getTotalNodeWidth: function() { |
| 47 | var inputWidth = this.inputs.length * NODE_INPUT_WIDTH; |
| 48 | return Math.max(inputWidth, this.width); |
| 49 | }, |
| 50 | getLabel: function() { |
| 51 | return this.label; |
| 52 | }, |
| 53 | getDisplayLabel: function() { |
| 54 | var result = this.id + ":" + this.label; |
| 55 | if (result.length > 30) { |
| 56 | return this.id + ":" + this.opcode; |
| 57 | } else { |
| 58 | return result; |
| 59 | } |
| 60 | }, |
| 61 | getType: function() { |
| 62 | return this.type; |
| 63 | }, |
| 64 | getDisplayType: function() { |
| 65 | var type_string = this.type; |
| 66 | if (type_string == undefined) return ""; |
| 67 | if (type_string.length > 24) { |
| 68 | type_string = type_string.substr(0, 25) + "..."; |
| 69 | } |
| 70 | return type_string; |
| 71 | }, |
| 72 | deepestInputRank: function() { |
| 73 | var deepestRank = 0; |
| 74 | this.inputs.forEach(function(e) { |
| 75 | if (e.isVisible() && !e.isBackEdge()) { |
| 76 | if (e.source.rank > deepestRank) { |
| 77 | deepestRank = e.source.rank; |
| 78 | } |
| 79 | } |
| 80 | }); |
| 81 | return deepestRank; |
| 82 | }, |
| 83 | areAnyOutputsVisible: function() { |
| 84 | var visibleCount = 0; |
| 85 | this.outputs.forEach(function(e) { if (e.isVisible()) ++visibleCount; }); |
| 86 | if (this.outputs.length == visibleCount) return 2; |
| 87 | if (visibleCount != 0) return 1; |
| 88 | return 0; |
| 89 | }, |
| 90 | setOutputVisibility: function(v) { |
| 91 | var result = false; |
| 92 | this.outputs.forEach(function(e) { |
| 93 | e.visible = v; |
| 94 | if (v) { |
| 95 | if (!e.target.visible) { |
| 96 | e.target.visible = true; |
| 97 | result = true; |
| 98 | } |
| 99 | } |
| 100 | }); |
| 101 | return result; |
| 102 | }, |
| 103 | setInputVisibility: function(i, v) { |
| 104 | var edge = this.inputs[i]; |
| 105 | edge.visible = v; |
| 106 | if (v) { |
| 107 | if (!edge.source.visible) { |
| 108 | edge.source.visible = true; |
| 109 | return true; |
| 110 | } |
| 111 | } |
| 112 | return false; |
| 113 | }, |
| 114 | getInputApproach: function(index) { |
| 115 | return this.y - MINIMUM_NODE_INPUT_APPROACH - |
| 116 | (index % 4) * MINIMUM_EDGE_SEPARATION - DEFAULT_NODE_BUBBLE_RADIUS |
| 117 | }, |
| 118 | getOutputApproach: function(graph, index) { |
| 119 | return this.y + this.outputApproach + graph.getNodeHeight() + |
| 120 | + DEFAULT_NODE_BUBBLE_RADIUS; |
| 121 | }, |
| 122 | getInputX: function(index) { |
| 123 | var result = this.getTotalNodeWidth() - (NODE_INPUT_WIDTH / 2) + |
| 124 | (index - this.inputs.length + 1) * NODE_INPUT_WIDTH; |
| 125 | return result; |
| 126 | }, |
| 127 | getOutputX: function() { |
| 128 | return this.getTotalNodeWidth() - (NODE_INPUT_WIDTH / 2); |
| 129 | }, |
| 130 | getFunctionRelativeSourcePosition: function(graph) { |
| 131 | return this.pos - graph.sourcePosition; |
| 132 | }, |
| 133 | hasBackEdges: function() { |
| 134 | return (this.opcode == "Loop") || |
| 135 | ((this.opcode == "Phi" || this.opcode == "EffectPhi") && |
| 136 | this.inputs[this.inputs.length - 1].source.opcode == "Loop"); |
| 137 | } |
| 138 | }; |