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Skip markLinkedReferences import elision walk entirely in some common cases (#59398)

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Wesley Wigham 2024-07-23 15:57:54 -07:00 committed by TypeScript Bot
parent c8a7d589e6
commit e0701af46e
2 changed files with 9 additions and 5 deletions
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13
src/compiler/checker.ts
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@ -49271,11 +49271,14 @@ export function createTypeChecker(host: TypeCheckerHost): TypeChecker {
function checkSingleIdentifier(node: Node) {
const nodeLinks = getNodeLinks(node);
nodeLinks.calculatedFlags |= NodeCheckFlags.ConstructorReference | NodeCheckFlags.CapturedBlockScopedBinding | NodeCheckFlags.BlockScopedBindingInLoop;
if (isIdentifier(node) && isExpressionNodeOrShorthandPropertyAssignmentName(node) && !(isPropertyAccessExpression(node.parent) && node.parent.name === node)) {
const s = getResolvedSymbol(node);
if (s && s !== unknownSymbol) {
checkIdentifierCalculateNodeCheckFlags(node, s);
nodeLinks.calculatedFlags |= NodeCheckFlags.ConstructorReference;
if (isIdentifier(node)) {
nodeLinks.calculatedFlags |= NodeCheckFlags.BlockScopedBindingInLoop | NodeCheckFlags.CapturedBlockScopedBinding; // Can't set on all arbitrary nodes (these nodes have this flag set by `checkSingleBlockScopeBinding` only)
if (isExpressionNodeOrShorthandPropertyAssignmentName(node) && !(isPropertyAccessExpression(node.parent) && node.parent.name === node)) {
const s = getResolvedSymbol(node);
if (s && s !== unknownSymbol) {
checkIdentifierCalculateNodeCheckFlags(node, s);
}
}
}
}

1
src/compiler/emitter.ts
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@ -947,6 +947,7 @@ export function emitFiles(resolver: EmitResolver, host: EmitHost, targetSourceFi
}
function markLinkedReferences(file: SourceFile) {
if (ts.isSourceFileJS(file)) return; // JS files don't use reference calculations as they don't do import ellision, no need to calculate it
ts.forEachChildRecursively(file, n => {
if (isImportEqualsDeclaration(n) && !(ts.getSyntacticModifierFlags(n) & ts.ModifierFlags.Export)) return "skip"; // These are deferred and marked in a chain when referenced
if (ts.isImportDeclaration(n)) return "skip"; // likewise, these are ultimately what get marked by calls on other nodes - we want to skip them