boomanaiden154 wrote:

> Yep, we see that memcpy intrinsics started to be expanded into loops

Are you using a custom pass pipeline? You will need something like 
https://github.com/halide/Halide/pull/8892 or all of the libcalls will be 
marked as unsupported. If you have a custom target you might need to update 
`RuntimeLibcalls.td` so that memcpy and friends are enabled.

If this is with upstream clang/flang, this would be more concerning, but it 
does not seem like there are any regressions there. There are a decent amount 
of memory libcall lowering tests.

https://github.com/llvm/llvm-project/pull/171452
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