[PATCH] D152383: CodeGen: Expand memory intrinsics in PreISelIntrinsicLowering

[Aditya Kumar via Phabricator via llvm-commits]

hiraditya added inline comments.


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Comment at: llvm/docs/ReleaseNotes.rst:274
 
+* ``llvm.memcpy``, ``llvm.memmove`` and ``llvm.memset`` are now
+  expanded into loops by default for targets which do not report the
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arsenm wrote:
> hiraditya wrote:
> > what happens when someone compiles a libc?
> > will all the calls to memcpy in libc files convert into for loops?
> > 
> Ideally the implementation of libc's memcpy would be a call to llvm.memcpy. Runtime libcalls needs to know that it cannot emit such a call during lowering
Thanks. it'll be great if we had some documentation on this.


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  https://reviews.llvm.org/D152383/new/

https://reviews.llvm.org/D152383