[PATCH] D132623: [CodeGen] Disable tail calls at -O0/-O1

[Paul Robinson via Phabricator via llvm-commits]

probinson added a comment.

> It would be interesting to have some sort of monolithic pipeline where we embed -O0/1/2/3/s/z attributes per-function in the frontend and don't have per-optimization-level pipelines.

I would balk at this.  A single generic pipeline at -O0 would be a compile-time performance hit, compared to the separate pipeline, and one of the explicit goals of -O0 is fast compilation.  I'd expect a hit also at -O1 although probably less noticeable.
(You could experiment with this today, by compiling `-emit-llvm -O0` to get IR with `optnone` everywhere, then compare compiling that IR at O0 vs O3 <https://reviews.llvm.org/owners/package/3/>.)


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https://reviews.llvm.org/D132623