| // Copyright 2015 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| package ssa |
| |
| import ( |
| "bytes" |
| "cmd/internal/src" |
| "fmt" |
| "html" |
| "io" |
| "os" |
| "os/exec" |
| "path/filepath" |
| "strconv" |
| "strings" |
| ) |
| |
| type HTMLWriter struct { |
| Logger |
| w io.WriteCloser |
| path string |
| dot *dotWriter |
| } |
| |
| func NewHTMLWriter(path string, logger Logger, funcname, cfgMask string) *HTMLWriter { |
| out, err := os.OpenFile(path, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0644) |
| if err != nil { |
| logger.Fatalf(src.NoXPos, "%v", err) |
| } |
| pwd, err := os.Getwd() |
| if err != nil { |
| logger.Fatalf(src.NoXPos, "%v", err) |
| } |
| html := HTMLWriter{w: out, Logger: logger, path: filepath.Join(pwd, path)} |
| html.dot = newDotWriter(cfgMask) |
| html.start(funcname) |
| return &html |
| } |
| |
| func (w *HTMLWriter) start(name string) { |
| if w == nil { |
| return |
| } |
| w.WriteString("<html>") |
| w.WriteString(`<head> |
| <meta http-equiv="Content-Type" content="text/html;charset=UTF-8"> |
| <style> |
| |
| body { |
| font-size: 14px; |
| font-family: Arial, sans-serif; |
| } |
| |
| h1 { |
| font-size: 18px; |
| display: inline-block; |
| margin: 0 1em .5em 0; |
| } |
| |
| #helplink { |
| display: inline-block; |
| } |
| |
| #help { |
| display: none; |
| } |
| |
| .stats { |
| font-size: 60%; |
| } |
| |
| table { |
| border: 1px solid black; |
| table-layout: fixed; |
| width: 300px; |
| } |
| |
| th, td { |
| border: 1px solid black; |
| overflow: hidden; |
| width: 400px; |
| vertical-align: top; |
| padding: 5px; |
| } |
| |
| td > h2 { |
| cursor: pointer; |
| font-size: 120%; |
| } |
| |
| td.collapsed { |
| font-size: 12px; |
| width: 12px; |
| border: 0px; |
| padding: 0; |
| cursor: pointer; |
| background: #fafafa; |
| } |
| |
| td.collapsed div { |
| -moz-transform: rotate(-90.0deg); /* FF3.5+ */ |
| -o-transform: rotate(-90.0deg); /* Opera 10.5 */ |
| -webkit-transform: rotate(-90.0deg); /* Saf3.1+, Chrome */ |
| filter: progid:DXImageTransform.Microsoft.BasicImage(rotation=0.083); /* IE6,IE7 */ |
| -ms-filter: "progid:DXImageTransform.Microsoft.BasicImage(rotation=0.083)"; /* IE8 */ |
| margin-top: 10.3em; |
| margin-left: -10em; |
| margin-right: -10em; |
| text-align: right; |
| } |
| |
| code, pre, .lines, .ast { |
| font-family: Menlo, monospace; |
| font-size: 12px; |
| } |
| |
| pre { |
| -moz-tab-size: 4; |
| -o-tab-size: 4; |
| tab-size: 4; |
| } |
| |
| .allow-x-scroll { |
| overflow-x: scroll; |
| } |
| |
| .lines { |
| float: left; |
| overflow: hidden; |
| text-align: right; |
| } |
| |
| .lines div { |
| padding-right: 10px; |
| color: gray; |
| } |
| |
| div.line-number { |
| font-size: 12px; |
| } |
| |
| .ast { |
| white-space: nowrap; |
| } |
| |
| td.ssa-prog { |
| width: 600px; |
| word-wrap: break-word; |
| } |
| |
| li { |
| list-style-type: none; |
| } |
| |
| li.ssa-long-value { |
| text-indent: -2em; /* indent wrapped lines */ |
| } |
| |
| li.ssa-value-list { |
| display: inline; |
| } |
| |
| li.ssa-start-block { |
| padding: 0; |
| margin: 0; |
| } |
| |
| li.ssa-end-block { |
| padding: 0; |
| margin: 0; |
| } |
| |
| ul.ssa-print-func { |
| padding-left: 0; |
| } |
| |
| li.ssa-start-block button { |
| padding: 0 1em; |
| margin: 0; |
| border: none; |
| display: inline; |
| font-size: 14px; |
| float: right; |
| } |
| |
| button:hover { |
| background-color: #eee; |
| cursor: pointer; |
| } |
| |
| dl.ssa-gen { |
| padding-left: 0; |
| } |
| |
| dt.ssa-prog-src { |
| padding: 0; |
| margin: 0; |
| float: left; |
| width: 4em; |
| } |
| |
| dd.ssa-prog { |
| padding: 0; |
| margin-right: 0; |
| margin-left: 4em; |
| } |
| |
| .dead-value { |
| color: gray; |
| } |
| |
| .dead-block { |
| opacity: 0.5; |
| } |
| |
| .depcycle { |
| font-style: italic; |
| } |
| |
| .line-number { |
| font-size: 11px; |
| } |
| |
| .no-line-number { |
| font-size: 11px; |
| color: gray; |
| } |
| |
| .zoom { |
| position: absolute; |
| float: left; |
| white-space: nowrap; |
| background-color: #eee; |
| } |
| |
| .zoom a:link, .zoom a:visited { |
| text-decoration: none; |
| color: blue; |
| font-size: 16px; |
| padding: 4px 2px; |
| } |
| |
| svg { |
| cursor: default; |
| outline: 1px solid #eee; |
| } |
| |
| .highlight-aquamarine { background-color: aquamarine; } |
| .highlight-coral { background-color: coral; } |
| .highlight-lightpink { background-color: lightpink; } |
| .highlight-lightsteelblue { background-color: lightsteelblue; } |
| .highlight-palegreen { background-color: palegreen; } |
| .highlight-skyblue { background-color: skyblue; } |
| .highlight-lightgray { background-color: lightgray; } |
| .highlight-yellow { background-color: yellow; } |
| .highlight-lime { background-color: lime; } |
| .highlight-khaki { background-color: khaki; } |
| .highlight-aqua { background-color: aqua; } |
| .highlight-salmon { background-color: salmon; } |
| |
| .outline-blue { outline: blue solid 2px; } |
| .outline-red { outline: red solid 2px; } |
| .outline-blueviolet { outline: blueviolet solid 2px; } |
| .outline-darkolivegreen { outline: darkolivegreen solid 2px; } |
| .outline-fuchsia { outline: fuchsia solid 2px; } |
| .outline-sienna { outline: sienna solid 2px; } |
| .outline-gold { outline: gold solid 2px; } |
| .outline-orangered { outline: orangered solid 2px; } |
| .outline-teal { outline: teal solid 2px; } |
| .outline-maroon { outline: maroon solid 2px; } |
| .outline-black { outline: black solid 2px; } |
| |
| ellipse.outline-blue { stroke-width: 2px; stroke: blue; } |
| ellipse.outline-red { stroke-width: 2px; stroke: red; } |
| ellipse.outline-blueviolet { stroke-width: 2px; stroke: blueviolet; } |
| ellipse.outline-darkolivegreen { stroke-width: 2px; stroke: darkolivegreen; } |
| ellipse.outline-fuchsia { stroke-width: 2px; stroke: fuchsia; } |
| ellipse.outline-sienna { stroke-width: 2px; stroke: sienna; } |
| ellipse.outline-gold { stroke-width: 2px; stroke: gold; } |
| ellipse.outline-orangered { stroke-width: 2px; stroke: orangered; } |
| ellipse.outline-teal { stroke-width: 2px; stroke: teal; } |
| ellipse.outline-maroon { stroke-width: 2px; stroke: maroon; } |
| ellipse.outline-black { stroke-width: 2px; stroke: black; } |
| |
| </style> |
| |
| <script type="text/javascript"> |
| // ordered list of all available highlight colors |
| var highlights = [ |
| "highlight-aquamarine", |
| "highlight-coral", |
| "highlight-lightpink", |
| "highlight-lightsteelblue", |
| "highlight-palegreen", |
| "highlight-skyblue", |
| "highlight-lightgray", |
| "highlight-yellow", |
| "highlight-lime", |
| "highlight-khaki", |
| "highlight-aqua", |
| "highlight-salmon" |
| ]; |
| |
| // state: which value is highlighted this color? |
| var highlighted = {}; |
| for (var i = 0; i < highlights.length; i++) { |
| highlighted[highlights[i]] = ""; |
| } |
| |
| // ordered list of all available outline colors |
| var outlines = [ |
| "outline-blue", |
| "outline-red", |
| "outline-blueviolet", |
| "outline-darkolivegreen", |
| "outline-fuchsia", |
| "outline-sienna", |
| "outline-gold", |
| "outline-orangered", |
| "outline-teal", |
| "outline-maroon", |
| "outline-black" |
| ]; |
| |
| // state: which value is outlined this color? |
| var outlined = {}; |
| for (var i = 0; i < outlines.length; i++) { |
| outlined[outlines[i]] = ""; |
| } |
| |
| window.onload = function() { |
| var ssaElemClicked = function(elem, event, selections, selected) { |
| event.stopPropagation(); |
| |
| // TODO: pushState with updated state and read it on page load, |
| // so that state can survive across reloads |
| |
| // find all values with the same name |
| var c = elem.classList.item(0); |
| var x = document.getElementsByClassName(c); |
| |
| // if selected, remove selections from all of them |
| // otherwise, attempt to add |
| |
| var remove = ""; |
| for (var i = 0; i < selections.length; i++) { |
| var color = selections[i]; |
| if (selected[color] == c) { |
| remove = color; |
| break; |
| } |
| } |
| |
| if (remove != "") { |
| for (var i = 0; i < x.length; i++) { |
| x[i].classList.remove(remove); |
| } |
| selected[remove] = ""; |
| return; |
| } |
| |
| // we're adding a selection |
| // find first available color |
| var avail = ""; |
| for (var i = 0; i < selections.length; i++) { |
| var color = selections[i]; |
| if (selected[color] == "") { |
| avail = color; |
| break; |
| } |
| } |
| if (avail == "") { |
| alert("out of selection colors; go add more"); |
| return; |
| } |
| |
| // set that as the selection |
| for (var i = 0; i < x.length; i++) { |
| x[i].classList.add(avail); |
| } |
| selected[avail] = c; |
| }; |
| |
| var ssaValueClicked = function(event) { |
| ssaElemClicked(this, event, highlights, highlighted); |
| }; |
| |
| var ssaBlockClicked = function(event) { |
| ssaElemClicked(this, event, outlines, outlined); |
| }; |
| |
| var ssavalues = document.getElementsByClassName("ssa-value"); |
| for (var i = 0; i < ssavalues.length; i++) { |
| ssavalues[i].addEventListener('click', ssaValueClicked); |
| } |
| |
| var ssalongvalues = document.getElementsByClassName("ssa-long-value"); |
| for (var i = 0; i < ssalongvalues.length; i++) { |
| // don't attach listeners to li nodes, just the spans they contain |
| if (ssalongvalues[i].nodeName == "SPAN") { |
| ssalongvalues[i].addEventListener('click', ssaValueClicked); |
| } |
| } |
| |
| var ssablocks = document.getElementsByClassName("ssa-block"); |
| for (var i = 0; i < ssablocks.length; i++) { |
| ssablocks[i].addEventListener('click', ssaBlockClicked); |
| } |
| |
| var lines = document.getElementsByClassName("line-number"); |
| for (var i = 0; i < lines.length; i++) { |
| lines[i].addEventListener('click', ssaValueClicked); |
| } |
| |
| // Contains phase names which are expanded by default. Other columns are collapsed. |
| var expandedDefault = [ |
| "start", |
| "deadcode", |
| "opt", |
| "lower", |
| "late deadcode", |
| "regalloc", |
| "genssa", |
| ]; |
| |
| function toggler(phase) { |
| return function() { |
| toggle_cell(phase+'-col'); |
| toggle_cell(phase+'-exp'); |
| }; |
| } |
| |
| function toggle_cell(id) { |
| var e = document.getElementById(id); |
| if (e.style.display == 'table-cell') { |
| e.style.display = 'none'; |
| } else { |
| e.style.display = 'table-cell'; |
| } |
| } |
| |
| // Go through all columns and collapse needed phases. |
| var td = document.getElementsByTagName("td"); |
| for (var i = 0; i < td.length; i++) { |
| var id = td[i].id; |
| var phase = id.substr(0, id.length-4); |
| var show = expandedDefault.indexOf(phase) !== -1 |
| if (id.endsWith("-exp")) { |
| var h2 = td[i].getElementsByTagName("h2"); |
| if (h2 && h2[0]) { |
| h2[0].addEventListener('click', toggler(phase)); |
| } |
| } else { |
| td[i].addEventListener('click', toggler(phase)); |
| } |
| if (id.endsWith("-col") && show || id.endsWith("-exp") && !show) { |
| td[i].style.display = 'none'; |
| continue; |
| } |
| td[i].style.display = 'table-cell'; |
| } |
| |
| // find all svg block nodes, add their block classes |
| var nodes = document.querySelectorAll('*[id^="graph_node_"]'); |
| for (var i = 0; i < nodes.length; i++) { |
| var node = nodes[i]; |
| var name = node.id.toString(); |
| var block = name.substring(name.lastIndexOf("_")+1); |
| node.classList.remove("node"); |
| node.classList.add(block); |
| node.addEventListener('click', ssaBlockClicked); |
| var ellipse = node.getElementsByTagName('ellipse')[0]; |
| ellipse.classList.add(block); |
| ellipse.addEventListener('click', ssaBlockClicked); |
| } |
| |
| // make big graphs smaller |
| var targetScale = 0.5; |
| var nodes = document.querySelectorAll('*[id^="svg_graph_"]'); |
| // TODO: Implement smarter auto-zoom using the viewBox attribute |
| // and in case of big graphs set the width and height of the svg graph to |
| // maximum allowed. |
| for (var i = 0; i < nodes.length; i++) { |
| var node = nodes[i]; |
| var name = node.id.toString(); |
| var phase = name.substring(name.lastIndexOf("_")+1); |
| var gNode = document.getElementById("g_graph_"+phase); |
| var scale = gNode.transform.baseVal.getItem(0).matrix.a; |
| if (scale > targetScale) { |
| node.width.baseVal.value *= targetScale / scale; |
| node.height.baseVal.value *= targetScale / scale; |
| } |
| } |
| }; |
| |
| function toggle_visibility(id) { |
| var e = document.getElementById(id); |
| if (e.style.display == 'block') { |
| e.style.display = 'none'; |
| } else { |
| e.style.display = 'block'; |
| } |
| } |
| |
| function hideBlock(el) { |
| var es = el.parentNode.parentNode.getElementsByClassName("ssa-value-list"); |
| if (es.length===0) |
| return; |
| var e = es[0]; |
| if (e.style.display === 'block' || e.style.display === '') { |
| e.style.display = 'none'; |
| el.innerHTML = '+'; |
| } else { |
| e.style.display = 'block'; |
| el.innerHTML = '-'; |
| } |
| } |
| |
| // TODO: scale the graph with the viewBox attribute. |
| function graphReduce(id) { |
| var node = document.getElementById(id); |
| if (node) { |
| node.width.baseVal.value *= 0.9; |
| node.height.baseVal.value *= 0.9; |
| } |
| return false; |
| } |
| |
| function graphEnlarge(id) { |
| var node = document.getElementById(id); |
| if (node) { |
| node.width.baseVal.value *= 1.1; |
| node.height.baseVal.value *= 1.1; |
| } |
| return false; |
| } |
| |
| function makeDraggable(event) { |
| var svg = event.target; |
| if (window.PointerEvent) { |
| svg.addEventListener('pointerdown', startDrag); |
| svg.addEventListener('pointermove', drag); |
| svg.addEventListener('pointerup', endDrag); |
| svg.addEventListener('pointerleave', endDrag); |
| } else { |
| svg.addEventListener('mousedown', startDrag); |
| svg.addEventListener('mousemove', drag); |
| svg.addEventListener('mouseup', endDrag); |
| svg.addEventListener('mouseleave', endDrag); |
| } |
| |
| var point = svg.createSVGPoint(); |
| var isPointerDown = false; |
| var pointerOrigin; |
| var viewBox = svg.viewBox.baseVal; |
| |
| function getPointFromEvent (event) { |
| point.x = event.clientX; |
| point.y = event.clientY; |
| |
| // We get the current transformation matrix of the SVG and we inverse it |
| var invertedSVGMatrix = svg.getScreenCTM().inverse(); |
| return point.matrixTransform(invertedSVGMatrix); |
| } |
| |
| function startDrag(event) { |
| isPointerDown = true; |
| pointerOrigin = getPointFromEvent(event); |
| } |
| |
| function drag(event) { |
| if (!isPointerDown) { |
| return; |
| } |
| event.preventDefault(); |
| |
| var pointerPosition = getPointFromEvent(event); |
| viewBox.x -= (pointerPosition.x - pointerOrigin.x); |
| viewBox.y -= (pointerPosition.y - pointerOrigin.y); |
| } |
| |
| function endDrag(event) { |
| isPointerDown = false; |
| } |
| }</script> |
| |
| </head>`) |
| w.WriteString("<body>") |
| w.WriteString("<h1>") |
| w.WriteString(html.EscapeString(name)) |
| w.WriteString("</h1>") |
| w.WriteString(` |
| <a href="#" onclick="toggle_visibility('help');return false;" id="helplink">help</a> |
| <div id="help"> |
| |
| <p> |
| Click on a value or block to toggle highlighting of that value/block |
| and its uses. (Values and blocks are highlighted by ID, and IDs of |
| dead items may be reused, so not all highlights necessarily correspond |
| to the clicked item.) |
| </p> |
| |
| <p> |
| Faded out values and blocks are dead code that has not been eliminated. |
| </p> |
| |
| <p> |
| Values printed in italics have a dependency cycle. |
| </p> |
| |
| <p> |
| <b>CFG</b>: Dashed edge is for unlikely branches. Blue color is for backward edges. |
| Edge with a dot means that this edge follows the order in which blocks were laidout. |
| </p> |
| |
| </div> |
| `) |
| w.WriteString("<table>") |
| w.WriteString("<tr>") |
| } |
| |
| func (w *HTMLWriter) Close() { |
| if w == nil { |
| return |
| } |
| io.WriteString(w.w, "</tr>") |
| io.WriteString(w.w, "</table>") |
| io.WriteString(w.w, "</body>") |
| io.WriteString(w.w, "</html>") |
| w.w.Close() |
| fmt.Printf("dumped SSA to %v\n", w.path) |
| } |
| |
| // WriteFunc writes f in a column headed by title. |
| // phase is used for collapsing columns and should be unique across the table. |
| func (w *HTMLWriter) WriteFunc(phase, title string, f *Func) { |
| if w == nil { |
| return // avoid generating HTML just to discard it |
| } |
| //w.WriteColumn(phase, title, "", f.HTML()) |
| w.WriteColumn(phase, title, "", f.HTML(phase, w.dot)) |
| } |
| |
| // FuncLines contains source code for a function to be displayed |
| // in sources column. |
| type FuncLines struct { |
| Filename string |
| StartLineno uint |
| Lines []string |
| } |
| |
| // ByTopo sorts topologically: target function is on top, |
| // followed by inlined functions sorted by filename and line numbers. |
| type ByTopo []*FuncLines |
| |
| func (x ByTopo) Len() int { return len(x) } |
| func (x ByTopo) Swap(i, j int) { x[i], x[j] = x[j], x[i] } |
| func (x ByTopo) Less(i, j int) bool { |
| a := x[i] |
| b := x[j] |
| if a.Filename == b.Filename { |
| return a.StartLineno < b.StartLineno |
| } |
| return a.Filename < b.Filename |
| } |
| |
| // WriteSources writes lines as source code in a column headed by title. |
| // phase is used for collapsing columns and should be unique across the table. |
| func (w *HTMLWriter) WriteSources(phase string, all []*FuncLines) { |
| if w == nil { |
| return // avoid generating HTML just to discard it |
| } |
| var buf bytes.Buffer |
| fmt.Fprint(&buf, "<div class=\"lines\" style=\"width: 8%\">") |
| filename := "" |
| for _, fl := range all { |
| fmt.Fprint(&buf, "<div> </div>") |
| if filename != fl.Filename { |
| fmt.Fprint(&buf, "<div> </div>") |
| filename = fl.Filename |
| } |
| for i := range fl.Lines { |
| ln := int(fl.StartLineno) + i |
| fmt.Fprintf(&buf, "<div class=\"l%v line-number\">%v</div>", ln, ln) |
| } |
| } |
| fmt.Fprint(&buf, "</div><div style=\"width: 92%\"><pre>") |
| filename = "" |
| for _, fl := range all { |
| fmt.Fprint(&buf, "<div> </div>") |
| if filename != fl.Filename { |
| fmt.Fprintf(&buf, "<div><strong>%v</strong></div>", fl.Filename) |
| filename = fl.Filename |
| } |
| for i, line := range fl.Lines { |
| ln := int(fl.StartLineno) + i |
| var escaped string |
| if strings.TrimSpace(line) == "" { |
| escaped = " " |
| } else { |
| escaped = html.EscapeString(line) |
| } |
| fmt.Fprintf(&buf, "<div class=\"l%v line-number\">%v</div>", ln, escaped) |
| } |
| } |
| fmt.Fprint(&buf, "</pre></div>") |
| w.WriteColumn(phase, phase, "allow-x-scroll", buf.String()) |
| } |
| |
| func (w *HTMLWriter) WriteAST(phase string, buf *bytes.Buffer) { |
| if w == nil { |
| return // avoid generating HTML just to discard it |
| } |
| lines := strings.Split(buf.String(), "\n") |
| var out bytes.Buffer |
| |
| fmt.Fprint(&out, "<div>") |
| for _, l := range lines { |
| l = strings.TrimSpace(l) |
| var escaped string |
| var lineNo string |
| if l == "" { |
| escaped = " " |
| } else { |
| if strings.HasPrefix(l, "buildssa") { |
| escaped = fmt.Sprintf("<b>%v</b>", l) |
| } else { |
| // Parse the line number from the format l(123). |
| idx := strings.Index(l, " l(") |
| if idx != -1 { |
| subl := l[idx+3:] |
| idxEnd := strings.Index(subl, ")") |
| if idxEnd != -1 { |
| if _, err := strconv.Atoi(subl[:idxEnd]); err == nil { |
| lineNo = subl[:idxEnd] |
| } |
| } |
| } |
| escaped = html.EscapeString(l) |
| } |
| } |
| if lineNo != "" { |
| fmt.Fprintf(&out, "<div class=\"l%v line-number ast\">%v</div>", lineNo, escaped) |
| } else { |
| fmt.Fprintf(&out, "<div class=\"ast\">%v</div>", escaped) |
| } |
| } |
| fmt.Fprint(&out, "</div>") |
| w.WriteColumn(phase, phase, "allow-x-scroll", out.String()) |
| } |
| |
| // WriteColumn writes raw HTML in a column headed by title. |
| // It is intended for pre- and post-compilation log output. |
| func (w *HTMLWriter) WriteColumn(phase, title, class, html string) { |
| if w == nil { |
| return |
| } |
| id := strings.Replace(phase, " ", "-", -1) |
| // collapsed column |
| w.Printf("<td id=\"%v-col\" class=\"collapsed\"><div>%v</div></td>", id, phase) |
| |
| if class == "" { |
| w.Printf("<td id=\"%v-exp\">", id) |
| } else { |
| w.Printf("<td id=\"%v-exp\" class=\"%v\">", id, class) |
| } |
| w.WriteString("<h2>" + title + "</h2>") |
| w.WriteString(html) |
| w.WriteString("</td>") |
| } |
| |
| func (w *HTMLWriter) Printf(msg string, v ...interface{}) { |
| if _, err := fmt.Fprintf(w.w, msg, v...); err != nil { |
| w.Fatalf(src.NoXPos, "%v", err) |
| } |
| } |
| |
| func (w *HTMLWriter) WriteString(s string) { |
| if _, err := io.WriteString(w.w, s); err != nil { |
| w.Fatalf(src.NoXPos, "%v", err) |
| } |
| } |
| |
| func (v *Value) 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 := v.String() |
| return fmt.Sprintf("<span class=\"%s ssa-value\">%s</span>", s, s) |
| } |
| |
| func (v *Value) LongHTML() string { |
| // TODO: Any intra-value formatting? |
| // I'm wary of adding too much visual noise, |
| // but a little bit might be valuable. |
| // We already have visual noise in the form of punctuation |
| // maybe we could replace some of that with formatting. |
| s := fmt.Sprintf("<span class=\"%s ssa-long-value\">", v.String()) |
| |
| linenumber := "<span class=\"no-line-number\">(?)</span>" |
| if v.Pos.IsKnown() { |
| linenumber = fmt.Sprintf("<span class=\"l%v line-number\">(%s)</span>", v.Pos.LineNumber(), v.Pos.LineNumberHTML()) |
| } |
| |
| s += fmt.Sprintf("%s %s = %s", v.HTML(), linenumber, v.Op.String()) |
| |
| 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(phase string, dot *dotWriter) string { |
| buf := new(bytes.Buffer) |
| if dot != nil { |
| dot.writeFuncSVG(buf, phase, f) |
| } |
| 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() |
| } |
| |
| func (d *dotWriter) writeFuncSVG(w io.Writer, phase string, f *Func) { |
| if d.broken { |
| return |
| } |
| if _, ok := d.phases[phase]; !ok { |
| return |
| } |
| cmd := exec.Command(d.path, "-Tsvg") |
| pipe, err := cmd.StdinPipe() |
| if err != nil { |
| d.broken = true |
| fmt.Println(err) |
| return |
| } |
| buf := new(bytes.Buffer) |
| cmd.Stdout = buf |
| bufErr := new(bytes.Buffer) |
| cmd.Stderr = bufErr |
| err = cmd.Start() |
| if err != nil { |
| d.broken = true |
| fmt.Println(err) |
| return |
| } |
| fmt.Fprint(pipe, `digraph "" { margin=0; size="4,40"; ranksep=.2; `) |
| id := strings.Replace(phase, " ", "-", -1) |
| fmt.Fprintf(pipe, `id="g_graph_%s";`, id) |
| fmt.Fprintf(pipe, `node [style=filled,fillcolor=white,fontsize=16,fontname="Menlo,Times,serif",margin="0.01,0.03"];`) |
| fmt.Fprintf(pipe, `edge [fontsize=16,fontname="Menlo,Times,serif"];`) |
| for i, b := range f.Blocks { |
| if b.Kind == BlockInvalid { |
| continue |
| } |
| layout := "" |
| if f.laidout { |
| layout = fmt.Sprintf(" #%d", i) |
| } |
| fmt.Fprintf(pipe, `%v [label="%v%s\n%v",id="graph_node_%v_%v",tooltip="%v"];`, b, b, layout, b.Kind.String(), id, b, b.LongString()) |
| } |
| indexOf := make([]int, f.NumBlocks()) |
| for i, b := range f.Blocks { |
| indexOf[b.ID] = i |
| } |
| layoutDrawn := make([]bool, f.NumBlocks()) |
| |
| ponums := make([]int32, f.NumBlocks()) |
| _ = postorderWithNumbering(f, ponums) |
| isBackEdge := func(from, to ID) bool { |
| return ponums[from] <= ponums[to] |
| } |
| |
| for _, b := range f.Blocks { |
| for i, s := range b.Succs { |
| style := "solid" |
| color := "black" |
| arrow := "vee" |
| if b.unlikelyIndex() == i { |
| style = "dashed" |
| } |
| if f.laidout && indexOf[s.b.ID] == indexOf[b.ID]+1 { |
| // Red color means ordered edge. It overrides other colors. |
| arrow = "dotvee" |
| layoutDrawn[s.b.ID] = true |
| } else if isBackEdge(b.ID, s.b.ID) { |
| color = "blue" |
| } |
| fmt.Fprintf(pipe, `%v -> %v [label=" %d ",style="%s",color="%s",arrowhead="%s"];`, b, s.b, i, style, color, arrow) |
| } |
| } |
| if f.laidout { |
| fmt.Fprintln(pipe, `edge[constraint=false,color=gray,style=solid,arrowhead=dot];`) |
| colors := [...]string{"#eea24f", "#f38385", "#f4d164", "#ca89fc", "gray"} |
| ci := 0 |
| for i := 1; i < len(f.Blocks); i++ { |
| if layoutDrawn[f.Blocks[i].ID] { |
| continue |
| } |
| fmt.Fprintf(pipe, `%s -> %s [color="%s"];`, f.Blocks[i-1], f.Blocks[i], colors[ci]) |
| ci = (ci + 1) % len(colors) |
| } |
| } |
| fmt.Fprint(pipe, "}") |
| pipe.Close() |
| err = cmd.Wait() |
| if err != nil { |
| d.broken = true |
| fmt.Printf("dot: %v\n%v\n", err, bufErr.String()) |
| return |
| } |
| |
| svgID := "svg_graph_" + id |
| fmt.Fprintf(w, `<div class="zoom"><button onclick="return graphReduce('%s');">-</button> <button onclick="return graphEnlarge('%s');">+</button></div>`, svgID, svgID) |
| // For now, an awful hack: edit the html as it passes through |
| // our fingers, finding '<svg ' and injecting needed attributes after it. |
| err = d.copyUntil(w, buf, `<svg `) |
| if err != nil { |
| fmt.Printf("injecting attributes: %v\n", err) |
| return |
| } |
| fmt.Fprintf(w, ` id="%s" onload="makeDraggable(evt)" `, svgID) |
| io.Copy(w, buf) |
| } |
| |
| func (b *Block) unlikelyIndex() int { |
| switch b.Likely { |
| case BranchLikely: |
| return 1 |
| case BranchUnlikely: |
| return 0 |
| } |
| return -1 |
| } |
| |
| func (d *dotWriter) copyUntil(w io.Writer, buf *bytes.Buffer, sep string) error { |
| i := bytes.Index(buf.Bytes(), []byte(sep)) |
| if i == -1 { |
| return fmt.Errorf("couldn't find dot sep %q", sep) |
| } |
| _, err := io.CopyN(w, buf, int64(i+len(sep))) |
| return err |
| } |
| |
| type htmlFuncPrinter struct { |
| w io.Writer |
| } |
| |
| func (p htmlFuncPrinter) header(f *Func) {} |
| |
| func (p htmlFuncPrinter) startBlock(b *Block, reachable bool) { |
| 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()) |
| } |
| } |
| if len(b.Values) > 0 { |
| io.WriteString(p.w, `<button onclick="hideBlock(this)">-</button>`) |
| } |
| 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>") |
| } |
| |
| 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>") |
| } |
| |
| type dotWriter struct { |
| path string |
| broken bool |
| phases map[string]bool // keys specify phases with CFGs |
| } |
| |
| // newDotWriter returns non-nil value when mask is valid. |
| // dotWriter will generate SVGs only for the phases specifed in the mask. |
| // mask can contain following patterns and combinations of them: |
| // * - all of them; |
| // x-y - x through y, inclusive; |
| // x,y - x and y, but not the passes between. |
| func newDotWriter(mask string) *dotWriter { |
| if mask == "" { |
| return nil |
| } |
| // User can specify phase name with _ instead of spaces. |
| mask = strings.Replace(mask, "_", " ", -1) |
| ph := make(map[string]bool) |
| ranges := strings.Split(mask, ",") |
| for _, r := range ranges { |
| spl := strings.Split(r, "-") |
| if len(spl) > 2 { |
| fmt.Printf("range is not valid: %v\n", mask) |
| return nil |
| } |
| var first, last int |
| if mask == "*" { |
| first = 0 |
| last = len(passes) - 1 |
| } else { |
| first = passIdxByName(spl[0]) |
| last = passIdxByName(spl[len(spl)-1]) |
| } |
| if first < 0 || last < 0 || first > last { |
| fmt.Printf("range is not valid: %v\n", r) |
| return nil |
| } |
| for p := first; p <= last; p++ { |
| ph[passes[p].name] = true |
| } |
| } |
| |
| path, err := exec.LookPath("dot") |
| if err != nil { |
| fmt.Println(err) |
| return nil |
| } |
| return &dotWriter{path: path, phases: ph} |
| } |
| |
| func passIdxByName(name string) int { |
| for i, p := range passes { |
| if p.name == name { |
| return i |
| } |
| } |
| return -1 |
| } |
