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c35069d642
Since we print almost everything to ssa.html in the GOSSAFUNC mode, there is a need to stop spamming stdout when user just wants to see ssa.html. This changes cleans output of the GOSSAFUNC debug mode. To enable the dump of the debug data to stdout, one must put suffix + after the function name like that: GOSSAFUNC=Foo+ Otherwise gc will not print the IR and ASM to stdout after each phase. AST IR is still sent to stdout because it is not included into ssa.html. It will be fixed in a separate change. The change adds printing out the full path to the ssa.html file. Updates #25942 Change-Id: I711e145e05f0443c7df5459ca528dced273a62ee Reviewed-on: https://go-review.googlesource.com/126603 Run-TryBot: Yury Smolsky <yury@smolsky.by> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Keith Randall <khr@golang.org>
676 lines
17 KiB
Go
676 lines
17 KiB
Go
// Copyright 2015 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package ssa
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import (
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"bytes"
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"cmd/internal/src"
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"fmt"
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"html"
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"io"
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"os"
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"path/filepath"
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"strings"
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)
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type HTMLWriter struct {
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Logger
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w io.WriteCloser
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path string
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}
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func NewHTMLWriter(path string, logger Logger, funcname string) *HTMLWriter {
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out, err := os.OpenFile(path, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0644)
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if err != nil {
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logger.Fatalf(src.NoXPos, "%v", err)
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}
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pwd, err := os.Getwd()
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if err != nil {
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logger.Fatalf(src.NoXPos, "%v", err)
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}
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html := HTMLWriter{w: out, Logger: logger, path: filepath.Join(pwd, path)}
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html.start(funcname)
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return &html
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}
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func (w *HTMLWriter) start(name string) {
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if w == nil {
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return
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}
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w.WriteString("<html>")
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w.WriteString(`<head>
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<meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
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<style>
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body {
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font-size: 14px;
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font-family: Arial, sans-serif;
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}
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#helplink {
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margin-bottom: 15px;
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display: block;
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margin-top: -15px;
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}
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#help {
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display: none;
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}
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.stats {
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font-size: 60%;
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}
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table {
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border: 1px solid black;
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table-layout: fixed;
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width: 300px;
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}
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th, td {
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border: 1px solid black;
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overflow: hidden;
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width: 400px;
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vertical-align: top;
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padding: 5px;
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}
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td > h2 {
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cursor: pointer;
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font-size: 120%;
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}
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td.collapsed {
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font-size: 12px;
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width: 12px;
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border: 0px;
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padding: 0;
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cursor: pointer;
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background: #fafafa;
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}
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td.collapsed div {
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-moz-transform: rotate(-90.0deg); /* FF3.5+ */
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-o-transform: rotate(-90.0deg); /* Opera 10.5 */
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-webkit-transform: rotate(-90.0deg); /* Saf3.1+, Chrome */
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filter: progid:DXImageTransform.Microsoft.BasicImage(rotation=0.083); /* IE6,IE7 */
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-ms-filter: "progid:DXImageTransform.Microsoft.BasicImage(rotation=0.083)"; /* IE8 */
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margin-top: 10.3em;
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margin-left: -10em;
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margin-right: -10em;
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text-align: right;
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}
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code, pre, .lines {
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font-family: Menlo, monospace;
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font-size: 12px;
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}
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.lines {
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float: left;
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overflow: hidden;
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text-align: right;
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}
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.lines div {
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padding-right: 10px;
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color: gray;
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}
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div.line-number {
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font-size: 12px;
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}
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td.ssa-prog {
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width: 600px;
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word-wrap: break-word;
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}
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li {
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list-style-type: none;
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}
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li.ssa-long-value {
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text-indent: -2em; /* indent wrapped lines */
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}
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li.ssa-value-list {
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display: inline;
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}
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li.ssa-start-block {
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padding: 0;
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margin: 0;
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}
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li.ssa-end-block {
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padding: 0;
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margin: 0;
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}
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ul.ssa-print-func {
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padding-left: 0;
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}
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dl.ssa-gen {
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padding-left: 0;
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}
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dt.ssa-prog-src {
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padding: 0;
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margin: 0;
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float: left;
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width: 4em;
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}
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dd.ssa-prog {
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padding: 0;
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margin-right: 0;
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margin-left: 4em;
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}
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.dead-value {
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color: gray;
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}
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.dead-block {
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opacity: 0.5;
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}
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.depcycle {
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font-style: italic;
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}
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.line-number {
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font-size: 11px;
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}
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.no-line-number {
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font-size: 11px;
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color: gray;
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}
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.highlight-aquamarine { background-color: aquamarine; }
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.highlight-coral { background-color: coral; }
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.highlight-lightpink { background-color: lightpink; }
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.highlight-lightsteelblue { background-color: lightsteelblue; }
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.highlight-palegreen { background-color: palegreen; }
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.highlight-skyblue { background-color: skyblue; }
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.highlight-lightgray { background-color: lightgray; }
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.highlight-yellow { background-color: yellow; }
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.highlight-lime { background-color: lime; }
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.highlight-khaki { background-color: khaki; }
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.highlight-aqua { background-color: aqua; }
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.highlight-salmon { background-color: salmon; }
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.outline-blue { outline: blue solid 2px; }
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.outline-red { outline: red solid 2px; }
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.outline-blueviolet { outline: blueviolet solid 2px; }
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.outline-darkolivegreen { outline: darkolivegreen solid 2px; }
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.outline-fuchsia { outline: fuchsia solid 2px; }
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.outline-sienna { outline: sienna solid 2px; }
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.outline-gold { outline: gold solid 2px; }
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.outline-orangered { outline: orangered solid 2px; }
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.outline-teal { outline: teal solid 2px; }
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.outline-maroon { outline: maroon solid 2px; }
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.outline-black { outline: black solid 2px; }
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</style>
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<script type="text/javascript">
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// ordered list of all available highlight colors
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var highlights = [
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"highlight-aquamarine",
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"highlight-coral",
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"highlight-lightpink",
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"highlight-lightsteelblue",
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"highlight-palegreen",
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"highlight-skyblue",
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"highlight-lightgray",
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"highlight-yellow",
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"highlight-lime",
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"highlight-khaki",
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"highlight-aqua",
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"highlight-salmon"
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];
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// state: which value is highlighted this color?
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var highlighted = {};
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for (var i = 0; i < highlights.length; i++) {
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highlighted[highlights[i]] = "";
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}
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// ordered list of all available outline colors
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var outlines = [
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"outline-blue",
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"outline-red",
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"outline-blueviolet",
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"outline-darkolivegreen",
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"outline-fuchsia",
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"outline-sienna",
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"outline-gold",
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"outline-orangered",
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"outline-teal",
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"outline-maroon",
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"outline-black"
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];
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// state: which value is outlined this color?
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var outlined = {};
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for (var i = 0; i < outlines.length; i++) {
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outlined[outlines[i]] = "";
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}
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window.onload = function() {
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var ssaElemClicked = function(elem, event, selections, selected) {
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event.stopPropagation();
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// TODO: pushState with updated state and read it on page load,
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// so that state can survive across reloads
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// find all values with the same name
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var c = elem.classList.item(0);
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var x = document.getElementsByClassName(c);
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// if selected, remove selections from all of them
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// otherwise, attempt to add
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var remove = "";
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for (var i = 0; i < selections.length; i++) {
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var color = selections[i];
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if (selected[color] == c) {
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remove = color;
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break;
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}
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}
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if (remove != "") {
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for (var i = 0; i < x.length; i++) {
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x[i].classList.remove(remove);
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}
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selected[remove] = "";
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return;
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}
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// we're adding a selection
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// find first available color
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var avail = "";
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for (var i = 0; i < selections.length; i++) {
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var color = selections[i];
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if (selected[color] == "") {
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avail = color;
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break;
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}
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}
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if (avail == "") {
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alert("out of selection colors; go add more");
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return;
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}
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// set that as the selection
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for (var i = 0; i < x.length; i++) {
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x[i].classList.add(avail);
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}
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selected[avail] = c;
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};
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var ssaValueClicked = function(event) {
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ssaElemClicked(this, event, highlights, highlighted);
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};
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var ssaBlockClicked = function(event) {
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ssaElemClicked(this, event, outlines, outlined);
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};
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var ssavalues = document.getElementsByClassName("ssa-value");
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for (var i = 0; i < ssavalues.length; i++) {
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ssavalues[i].addEventListener('click', ssaValueClicked);
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}
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var ssalongvalues = document.getElementsByClassName("ssa-long-value");
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for (var i = 0; i < ssalongvalues.length; i++) {
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// don't attach listeners to li nodes, just the spans they contain
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if (ssalongvalues[i].nodeName == "SPAN") {
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ssalongvalues[i].addEventListener('click', ssaValueClicked);
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}
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}
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var ssablocks = document.getElementsByClassName("ssa-block");
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for (var i = 0; i < ssablocks.length; i++) {
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ssablocks[i].addEventListener('click', ssaBlockClicked);
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}
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var lines = document.getElementsByClassName("line-number");
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for (var i = 0; i < lines.length; i++) {
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lines[i].addEventListener('click', ssaValueClicked);
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}
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// Contains phase names which are expanded by default. Other columns are collapsed.
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var expandedDefault = [
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"start",
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"deadcode",
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"opt",
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"lower",
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"late deadcode",
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"regalloc",
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"genssa",
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];
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function toggler(phase) {
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return function() {
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toggle_cell(phase+'-col');
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toggle_cell(phase+'-exp');
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};
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}
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function toggle_cell(id) {
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var e = document.getElementById(id);
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if (e.style.display == 'table-cell') {
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e.style.display = 'none';
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} else {
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e.style.display = 'table-cell';
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}
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}
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// Go through all columns and collapse needed phases.
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var td = document.getElementsByTagName("td");
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for (var i = 0; i < td.length; i++) {
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var id = td[i].id;
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var phase = id.substr(0, id.length-4);
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var show = expandedDefault.indexOf(phase) !== -1
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if (id.endsWith("-exp")) {
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var h2 = td[i].getElementsByTagName("h2");
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if (h2 && h2[0]) {
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h2[0].addEventListener('click', toggler(phase));
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}
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} else {
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td[i].addEventListener('click', toggler(phase));
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}
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if (id.endsWith("-col") && show || id.endsWith("-exp") && !show) {
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td[i].style.display = 'none';
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continue;
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}
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td[i].style.display = 'table-cell';
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}
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};
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function toggle_visibility(id) {
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var e = document.getElementById(id);
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if (e.style.display == 'block') {
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e.style.display = 'none';
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} else {
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e.style.display = 'block';
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}
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}
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</script>
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</head>`)
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w.WriteString("<body>")
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w.WriteString("<h1>")
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w.WriteString(html.EscapeString(name))
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w.WriteString("</h1>")
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w.WriteString(`
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<a href="#" onclick="toggle_visibility('help');" id="helplink">help</a>
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<div id="help">
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<p>
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Click on a value or block to toggle highlighting of that value/block
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and its uses. (Values and blocks are highlighted by ID, and IDs of
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dead items may be reused, so not all highlights necessarily correspond
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to the clicked item.)
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</p>
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<p>
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Faded out values and blocks are dead code that has not been eliminated.
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</p>
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<p>
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Values printed in italics have a dependency cycle.
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</p>
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</div>
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`)
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w.WriteString("<table>")
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w.WriteString("<tr>")
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}
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func (w *HTMLWriter) Close() {
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if w == nil {
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return
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}
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io.WriteString(w.w, "</tr>")
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io.WriteString(w.w, "</table>")
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io.WriteString(w.w, "</body>")
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io.WriteString(w.w, "</html>")
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w.w.Close()
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fmt.Printf("dumped SSA to %v\n", w.path)
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}
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// WriteFunc writes f in a column headed by title.
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// phase is used for collapsing columns and should be unique across the table.
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func (w *HTMLWriter) WriteFunc(phase, title string, f *Func) {
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if w == nil {
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return // avoid generating HTML just to discard it
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}
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w.WriteColumn(phase, title, "", f.HTML())
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// TODO: Add visual representation of f's CFG.
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}
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// WriteSources writes lines as source code in a column headed by title.
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// phase is used for collapsing columns and should be unique across the table.
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func (w *HTMLWriter) WriteSources(phase, title string, firstLineno uint, lines []string) {
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if w == nil {
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return // avoid generating HTML just to discard it
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}
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var buf bytes.Buffer
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fmt.Fprint(&buf, "<div class=\"lines\" style=\"width: 8%\">")
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for i, _ := range lines {
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ln := int(firstLineno) + i
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fmt.Fprintf(&buf, "<div class=\"l%v line-number\">%v</div>", ln, ln)
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}
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fmt.Fprint(&buf, "</div><div style=\"width: 92%\"><pre>")
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for i, l := range lines {
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ln := int(firstLineno) + i
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fmt.Fprintf(&buf, "<div class=\"l%v line-number\">%v</div>", ln, html.EscapeString(l))
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}
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fmt.Fprint(&buf, "</pre></div>")
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w.WriteColumn(phase, title, "", buf.String())
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}
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// WriteColumn writes raw HTML in a column headed by title.
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// It is intended for pre- and post-compilation log output.
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func (w *HTMLWriter) WriteColumn(phase, title, class, html string) {
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if w == nil {
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return
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}
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id := strings.Replace(phase, " ", "-", -1)
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// collapsed column
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w.Printf("<td id=\"%v-col\" class=\"collapsed\"><div>%v</div></td>", id, phase)
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if class == "" {
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w.Printf("<td id=\"%v-exp\">", id)
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} else {
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w.Printf("<td id=\"%v-exp\" class=\"%v\">", id, class)
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}
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w.WriteString("<h2>" + title + "</h2>")
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w.WriteString(html)
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w.WriteString("</td>")
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}
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func (w *HTMLWriter) Printf(msg string, v ...interface{}) {
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if _, err := fmt.Fprintf(w.w, msg, v...); err != nil {
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w.Fatalf(src.NoXPos, "%v", err)
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}
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}
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func (w *HTMLWriter) WriteString(s string) {
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if _, err := io.WriteString(w.w, s); err != nil {
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w.Fatalf(src.NoXPos, "%v", err)
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}
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}
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func (v *Value) HTML() string {
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// TODO: Using the value ID as the class ignores the fact
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// that value IDs get recycled and that some values
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// are transmuted into other values.
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s := v.String()
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return fmt.Sprintf("<span class=\"%s ssa-value\">%s</span>", s, s)
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}
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func (v *Value) LongHTML() string {
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// TODO: Any intra-value formatting?
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// I'm wary of adding too much visual noise,
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// but a little bit might be valuable.
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// We already have visual noise in the form of punctuation
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// maybe we could replace some of that with formatting.
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s := fmt.Sprintf("<span class=\"%s ssa-long-value\">", v.String())
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linenumber := "<span class=\"no-line-number\">(?)</span>"
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if v.Pos.IsKnown() {
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linenumber = fmt.Sprintf("<span class=\"l%v line-number\">(%s)</span>", v.Pos.LineNumber(), v.Pos.LineNumberHTML())
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}
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s += fmt.Sprintf("%s %s = %s", v.HTML(), linenumber, v.Op.String())
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|
|
s += " <" + html.EscapeString(v.Type.String()) + ">"
|
|
s += html.EscapeString(v.auxString())
|
|
for _, a := range v.Args {
|
|
s += fmt.Sprintf(" %s", a.HTML())
|
|
}
|
|
r := v.Block.Func.RegAlloc
|
|
if int(v.ID) < len(r) && r[v.ID] != nil {
|
|
s += " : " + html.EscapeString(r[v.ID].String())
|
|
}
|
|
var names []string
|
|
for name, values := range v.Block.Func.NamedValues {
|
|
for _, value := range values {
|
|
if value == v {
|
|
names = append(names, name.String())
|
|
break // drop duplicates.
|
|
}
|
|
}
|
|
}
|
|
if len(names) != 0 {
|
|
s += " (" + strings.Join(names, ", ") + ")"
|
|
}
|
|
|
|
s += "</span>"
|
|
return s
|
|
}
|
|
|
|
func (b *Block) HTML() string {
|
|
// TODO: Using the value ID as the class ignores the fact
|
|
// that value IDs get recycled and that some values
|
|
// are transmuted into other values.
|
|
s := html.EscapeString(b.String())
|
|
return fmt.Sprintf("<span class=\"%s ssa-block\">%s</span>", s, s)
|
|
}
|
|
|
|
func (b *Block) LongHTML() string {
|
|
// TODO: improve this for HTML?
|
|
s := fmt.Sprintf("<span class=\"%s ssa-block\">%s</span>", html.EscapeString(b.String()), html.EscapeString(b.Kind.String()))
|
|
if b.Aux != nil {
|
|
s += html.EscapeString(fmt.Sprintf(" {%v}", b.Aux))
|
|
}
|
|
if b.Control != nil {
|
|
s += fmt.Sprintf(" %s", b.Control.HTML())
|
|
}
|
|
if len(b.Succs) > 0 {
|
|
s += " →" // right arrow
|
|
for _, e := range b.Succs {
|
|
c := e.b
|
|
s += " " + c.HTML()
|
|
}
|
|
}
|
|
switch b.Likely {
|
|
case BranchUnlikely:
|
|
s += " (unlikely)"
|
|
case BranchLikely:
|
|
s += " (likely)"
|
|
}
|
|
if b.Pos.IsKnown() {
|
|
// TODO does not begin to deal with the full complexity of line numbers.
|
|
// Maybe we want a string/slice instead, of outer-inner when inlining.
|
|
s += fmt.Sprintf(" <span class=\"l%v line-number\">(%s)</span>", b.Pos.LineNumber(), b.Pos.LineNumberHTML())
|
|
}
|
|
return s
|
|
}
|
|
|
|
func (f *Func) HTML() string {
|
|
var buf bytes.Buffer
|
|
fmt.Fprint(&buf, "<code>")
|
|
p := htmlFuncPrinter{w: &buf}
|
|
fprintFunc(p, f)
|
|
|
|
// fprintFunc(&buf, f) // TODO: HTML, not text, <br /> for line breaks, etc.
|
|
fmt.Fprint(&buf, "</code>")
|
|
return buf.String()
|
|
}
|
|
|
|
type htmlFuncPrinter struct {
|
|
w io.Writer
|
|
}
|
|
|
|
func (p htmlFuncPrinter) header(f *Func) {}
|
|
|
|
func (p htmlFuncPrinter) startBlock(b *Block, reachable bool) {
|
|
// TODO: Make blocks collapsable?
|
|
var dead string
|
|
if !reachable {
|
|
dead = "dead-block"
|
|
}
|
|
fmt.Fprintf(p.w, "<ul class=\"%s ssa-print-func %s\">", b, dead)
|
|
fmt.Fprintf(p.w, "<li class=\"ssa-start-block\">%s:", b.HTML())
|
|
if len(b.Preds) > 0 {
|
|
io.WriteString(p.w, " ←") // left arrow
|
|
for _, e := range b.Preds {
|
|
pred := e.b
|
|
fmt.Fprintf(p.w, " %s", pred.HTML())
|
|
}
|
|
}
|
|
io.WriteString(p.w, "</li>")
|
|
if len(b.Values) > 0 { // start list of values
|
|
io.WriteString(p.w, "<li class=\"ssa-value-list\">")
|
|
io.WriteString(p.w, "<ul>")
|
|
}
|
|
}
|
|
|
|
func (p htmlFuncPrinter) endBlock(b *Block) {
|
|
if len(b.Values) > 0 { // end list of values
|
|
io.WriteString(p.w, "</ul>")
|
|
io.WriteString(p.w, "</li>")
|
|
}
|
|
io.WriteString(p.w, "<li class=\"ssa-end-block\">")
|
|
fmt.Fprint(p.w, b.LongHTML())
|
|
io.WriteString(p.w, "</li>")
|
|
io.WriteString(p.w, "</ul>")
|
|
// io.WriteString(p.w, "</span>")
|
|
}
|
|
|
|
func (p htmlFuncPrinter) value(v *Value, live bool) {
|
|
var dead string
|
|
if !live {
|
|
dead = "dead-value"
|
|
}
|
|
fmt.Fprintf(p.w, "<li class=\"ssa-long-value %s\">", dead)
|
|
fmt.Fprint(p.w, v.LongHTML())
|
|
io.WriteString(p.w, "</li>")
|
|
}
|
|
|
|
func (p htmlFuncPrinter) startDepCycle() {
|
|
fmt.Fprintln(p.w, "<span class=\"depcycle\">")
|
|
}
|
|
|
|
func (p htmlFuncPrinter) endDepCycle() {
|
|
fmt.Fprintln(p.w, "</span>")
|
|
}
|
|
|
|
func (p htmlFuncPrinter) named(n LocalSlot, vals []*Value) {
|
|
fmt.Fprintf(p.w, "<li>name %s: ", n)
|
|
for _, val := range vals {
|
|
fmt.Fprintf(p.w, "%s ", val.HTML())
|
|
}
|
|
fmt.Fprintf(p.w, "</li>")
|
|
}
|