Method generate

lib/wasm-sync/WebAssemblyGenerator.js:462–536

* Generates generated code for this runtime module. * @param {NormalModule} module module for which the code should be generated * @param {GenerateContext} generateContext context for generate * @returns {Source | null} generated code

(module, { moduleGraph, runtime })

	 * @returns {Source | null} generated code
	 */
	generate(module, { moduleGraph, runtime }) {
		const bin =
			/** @type {Buffer} */
			(/** @type {Source} */ (module.originalSource()).source());

		const initFuncId = t.identifier("");

		// parse it
		const ast = decode(bin, {
			ignoreDataSection: true,
			ignoreCodeSection: true,
			ignoreCustomNameSection: true
		});

		const moduleContext = moduleContextFromModuleAST(ast.body[0]);

		const importedGlobals = getImportedGlobals(ast);
		const countImportedFunc = getCountImportedFunc(ast);
		const startAtFuncOffset = moduleContext.getStart();
		const nextFuncIndex = getNextFuncIndex(ast, countImportedFunc);
		const nextTypeIndex = getNextTypeIndex(ast);

		const usedDependencyMap = getUsedDependencyMap(
			moduleGraph,
			module,
			this.options.mangleImports
		);
		const externalExports = new Set(
			module.dependencies
				.filter((d) => d instanceof WebAssemblyExportImportedDependency)
				.map((d) => {
					const wasmDep = /** @type {WebAssemblyExportImportedDependency} */ (
						d
					);
					return wasmDep.exportName;
				})
		);

		/** @type {t.Instruction[]} */
		const additionalInitCode = [];

		const transform = compose(
			rewriteExportNames({
				ast,
				moduleGraph,
				module,
				externalExports,
				runtime
			}),

			removeStartFunc({ ast }),

			rewriteImportedGlobals({ ast, additionalInitCode }),

			rewriteImports({
				ast,
				usedDependencyMap
			}),