Module inline_iifes 

Inlines immediately invoked function expressions (IIFEs) to allow more fine-grained memoization of the values they produce.

Example:

const x = (() => {
   const x = [];
   x.push(foo());
   return x;
})();

=>

bb0:
    // placeholder for the result, all return statements will assign here
   let t0;
   // Label allows using a goto (break) to exit out of the body
   Label block=bb1 fallthrough=bb2
bb1:
   // code within the function expression
   const x0 = [];
   x0.push(foo());
   // return is replaced by assignment to the result variable...
   t0 = x0;
   // ...and a goto to the code after the function expression invocation
   Goto bb2
bb2:
   // code after the IIFE call
   const x = t0;

If the inlined function has only one return, we avoid the labeled block and fully inline the code. The original return is replaced with an assignment to the IIFE’s call expression lvalue.

Analogous to TS Inference/InlineImmediatelyInvokedFunctionExpressions.ts.

Functions

inline_immediately_invoked_function_expressions

Inline immediately invoked function expressions into the enclosing function’s control flow graph.