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

[Matt Arsenault via Phabricator via llvm-commits]

arsenm 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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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


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https://reviews.llvm.org/D152383