search for: d35035

Looks like there are a lot of opinions where memcpy expansion/inlining needs to happen: (late) IR, or if it is a backend problem, see also for example https://reviews.llvm.org/D35035. Complicating factor here is that efficient memcpy lowering is crucial for performance and code-size (and they occur a lot). Either way, I agree that the TLI hooks are not SelectionDAG specific, they can be used in an IR lowering pass. Cheers, Sjoerd. ________________________________ From: llvm-...

Hi all, For GlobalISel, we’re exploring options for implementing inlining optimizations for memcpy and friends. However, looking around the existing implementation, I don’t see anything that would particularly be problematic for us to do it at the IR level. The existing TLI hooks to specify how certain memcpy calls should be lowered doesn’t have anything too SelectionDAG specific, and an IR