[PATCH] D88712: [CGBuiltin] Respect asm labels and redefine_extname for builtins with specialized emitting

[Fangrui Song via Phabricator via cfe-commits]

MaskRay added a comment.

In case my previous comment is not clear: we can do renaming in LLVM, but the benefit is small (for a few libcalls (only some really simple libcalls) with custom code emitting, if they have `asm(...)`, they are now optimizable). We will require a renaming infrastructure in LLVM IR, which is a large undertaking. The patch as is is the most practical approach.


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D88712/new/

https://reviews.llvm.org/D88712