Add d8 for disassembling javascript

etc/config/javascript.amazon.properties

@@ -0,0 +1,22 @@
+compilers=&v8
+defaultCompiler=v8trunk
+
+group.v8.compilers=v8trunk:v8113
+group.v8.isSemver=false
+group.v8.baseName=v8
+
+compiler.v8trunk.exe=/opt/compiler-explorer/d8-trunk/d8
+compiler.v8trunk.options=--print-opt-code --redirect-code-traces --allow-natives-syntax
+
+compiler.v8113.exe=/opt/compiler-explorer/d8-11.3/d8
+compiler.v8113.options=--print-opt-code --redirect-code-traces --allow-natives-syntax
+
+supportsBinary=false
+interpreted=true
+compilerType=v8
+objdumper=
+demangler=
+postProcess=
+options=
+supportsExecute=false
+stubText=

etc/config/javascript.defaults.properties

@@ -0,0 +1,26 @@
+# Default settings for v8
+
+compilers=&v8
+defaultCompiler=v8trunk
+
+group.v8.compilers=v8trunk:v8113
+group.v8.isSemver=false
+group.v8.baseName=v8
+
+compiler.v8trunk.exe=d8
+compiler.v8trunk.options=--print-opt-code --redirect-code-traces --allow-natives-syntax
+
+compiler.v8113.exe=d8
+compiler.v8113.options=--print-opt-code --redirect-code-traces --allow-natives-syntax
+
+supportsBinary=false
+interpreted=true
+compilerType=v8
+objdumper=
+demangler=
+postProcess=
+options=
+supportsExecute=false
+stubText=
+
+

examples/javascript/default.mjs

@@ -0,0 +1,13 @@
+function square(a) {
+	let result = a * a;
+	return result;
+}
+
+// Call function once to fill type information
+square(23);
+
+// Call function again to go from uninitialized -> pre-monomorphic -> monomorphic
+square(13);
+%OptimizeFunctionOnNextCall(square);
+square(71);
+

lib/compilers/_all.ts

@@ -104,6 +104,7 @@ export {ToitCompiler} from './toit.js';
 export {TurboCCompiler} from './turboc.js';
 export {TypeScriptNativeCompiler} from './typescript-native.js';
 export {VBCompiler} from './dotnet.js';
+export {V8Compiler} from './v8.js';
 export {Win32Compiler} from './win32.js';
 export {Win32Vc6Compiler} from './win32-vc6.js';
 export {Win32VcCompiler} from './win32-vc.js';

lib/compilers/v8.ts

@@ -0,0 +1,63 @@
+// Copyright (c) 2023, Compiler Explorer Authors
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are met:
+//
+//     * Redistributions of source code must retain the above copyright notice,
+//       this list of conditions and the following disclaimer.
+//     * 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 THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 THE COPYRIGHT HOLDER 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.
+
+import path from 'path';
+import type {ParseFiltersAndOutputOptions} from '../../types/features/filters.interfaces.js';
+import type {PreliminaryCompilerInfo} from '../../types/compiler.interfaces.js';
+import {BaseCompiler} from '../base-compiler.js';
+
+export class V8Compiler extends BaseCompiler {
+    static get key() {
+        return 'v8';
+    }
+
+    constructor(compilerInfo: PreliminaryCompilerInfo, env) {
+        super(compilerInfo, env);
+        this.compiler.demangler = '';
+        this.demanglerClass = null;
+    }
+
+    override getIrOutputFilename(inputFilename: string, filters: ParseFiltersAndOutputOptions): string {
+        return this.filename(path.dirname(inputFilename) + '/code.asm');
+    }
+
+    public override getOutputFilename(dirPath: string, outputFilebase: string, key?: any) {
+        let filename;
+        if (key && key.backendOptions && key.backendOptions.customOutputFilename) {
+            filename = key.backendOptions.customOutputFilename;
+        } else {
+            filename = 'code.asm';
+        }
+
+        if (dirPath) {
+            return path.join(dirPath, filename);
+        } else {
+            return filename;
+        }
+    }
+
+    override optionsForFilter(filters: ParseFiltersAndOutputOptions, outputFilename: string) {
+        return [];
+    }
+}

lib/languages.ts

@@ -649,6 +649,17 @@ const definitions: Record<LanguageKey, LanguageDefinition> = {
         previewFilter: null,
         monacoDisassembly: null,
     },
+    javascript: {
+        name: 'Javascript',
+        monaco: 'typescript',
+        extensions: ['.mjs'],
+        alias: [],
+        logoUrl: 'js.svg',
+        logoUrlDark: null,
+        formatter: null,
+        previewFilter: null,
+        monacoDisassembly: null,
+    },
 };
 
 export const languages: Record<LanguageKey, Language> = _.mapObject(definitions, (lang, key) => {

types/languages.interfaces.ts

@@ -55,6 +55,7 @@ export type LanguageKey =
     | 'jakt'
     | 'java'
     | 'julia'
+    | 'javascript'
     | 'kotlin'
     | 'llvm'
     | 'llvm_mir'