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There are passes which mark function parameters as "nocapture", which means that the function does not store the passed-in pointer for use after that function returns. If pointers to a newly created object are only ever passed through "nocapture" parameters, never stored in a global, and not returned from the function, then that object is dead when the function that created

I'm working on an LLVM-based compiler for a very closure-centric language. It's becoming apparent that it's going to suffer heavily from garbage collector churn, as all the useful programming idioms the language makes possible are going to involve memory allocations, either to create objects or to allocate storage for upvalues. However, it's possible to optimise away a lot of heap

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