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Add support for the 'mutable-global' proposal behind a feature flag

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dcodeIO 2018-05-08 09:27:56 +02:00
parent 1bf0ca6525
commit 27f0621ee9
8 changed files with 23 additions and 13 deletions
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4
bin/asc.js
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@ -379,8 +379,8 @@ exports.main = function main(argv, options, callback) {
if (typeof features === "string") features = features.split(",");
for (let i = 0, k = features.length; i < k; ++i) {
let name = features[i].trim();
let flag = assemblyscript["FEATURE_" + name.toUpperCase()];
if (!flag) return callback(Error("Feature '" + name + "' is invalid."));
let flag = assemblyscript["FEATURE_" + name.replace(/\-/g, "_").toUpperCase()];
if (!flag) return callback(Error("Feature '" + name + "' is unknown."));
assemblyscript.enableFeature(compilerOptions, flag);
}
}

8
bin/asc.json
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@ -150,7 +150,13 @@
"type": "string"
},
"feature": {
"desc": "Enables additional (experimental) WebAssembly features.",
"desc": [
"Enables additional (experimental) WebAssembly features.",
"",
" sign-extension Enables sign-extension operations",
" mutable-global Enables mutable global imports and exports",
""
],
"type": "string"
},
"measure": {

2
dist/asc.js vendored
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2
dist/asc.js.map vendored
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2
dist/assemblyscript.js vendored
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dist/assemblyscript.js.map vendored
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12
src/compiler.ts
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@ -207,7 +207,9 @@ export const enum Feature {
/** No additional features. */
NONE = 0,
/** Sign extension operations. */
SIGNEXT = 1 << 0 // see: https://github.com/WebAssembly/sign-extension-ops
SIGN_EXTENSION = 1 << 0, // see: https://github.com/WebAssembly/sign-extension-ops
/** Mutable global imports and exports. */
MUTABLE_GLOBAL = 1 << 1 // see: https://github.com/WebAssembly/mutable-global
}
/** Indicates the desired kind of a conversion. */
@ -551,7 +553,7 @@ export class Compiler extends DiagnosticEmitter {
if (global.is(CommonFlags.AMBIENT)) {
// constant global
if (isConstant) {
if (isConstant || this.options.hasFeature(Feature.MUTABLE_GLOBAL)) {
global.set(CommonFlags.MODULE_IMPORT);
module.addGlobalImport(
global.internalName,
@ -768,7 +770,7 @@ export class Compiler extends DiagnosticEmitter {
// export values if the enum is exported
if (element.is(CommonFlags.MODULE_EXPORT)) {
if (member.is(CommonFlags.INLINED)) {
if (member.is(CommonFlags.INLINED) || this.options.hasFeature(Feature.MUTABLE_GLOBAL)) {
module.addGlobalExport(member.internalName, mangleExportName(member));
} else if (valueDeclaration) {
this.warning(
@ -6811,7 +6813,7 @@ export class Compiler extends DiagnosticEmitter {
switch (type.kind) {
case TypeKind.I8: {
if (flow.canOverflow(expr, type)) {
expr = this.options.hasFeature(Feature.SIGNEXT)
expr = this.options.hasFeature(Feature.SIGN_EXTENSION)
? module.createUnary(UnaryOp.ExtendI8ToI32, expr)
: module.createBinary(BinaryOp.ShrI32,
module.createBinary(BinaryOp.ShlI32,
@ -6825,7 +6827,7 @@ export class Compiler extends DiagnosticEmitter {
}
case TypeKind.I16: {
if (flow.canOverflow(expr, type)) {
expr = this.options.hasFeature(Feature.SIGNEXT)
expr = this.options.hasFeature(Feature.SIGN_EXTENSION)
? module.createUnary(UnaryOp.ExtendI16ToI32, expr)
: module.createBinary(BinaryOp.ShrI32,
module.createBinary(BinaryOp.ShlI32,

4
src/index.ts
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@ -131,7 +131,9 @@ export function setGlobalAlias(options: Options, name: string, alias: string): v
}
/** Sign extension operations. */
export const FEATURE_SIGNEXT = Feature.SIGNEXT;
export const FEATURE_SIGN_EXTENSION = Feature.SIGN_EXTENSION;
/** Mutable global imports and exports. */
export const FEATURE_MUTABLE_GLOBAL = Feature.MUTABLE_GLOBAL;
/** Enables a specific feature. */
export function enableFeature(options: Options, feature: Feature): void {