[PATCH] D88328: [InferAttrs] Improve DSE for libcalls (partial fix for PR47644)

[Florian Hahn via Phabricator via llvm-commits]

fhahn added reviewers: jdoerfert, lebedev.ri.
fhahn added a comment.

I think it would be good to update the commit message to just state that this adds `no capture` and `write only` to the first arg of `strcpy` & co. It also unifies `strcpy` & `stpcpy` handling. might be good to do separately first.



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Comment at: llvm/test/Transforms/PhaseOrdering/dse-libcalls.ll:11
+
+define void @dse_strcpy(i8* nocapture readonly %src) {
+; OLDPM-LABEL: @dse_strcpy(
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Can we just add those tests to `llvm/test/Transforms/DeadStoreElimination/MSSA/libcalls.ll`?


Repository:
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  https://reviews.llvm.org/D88328/new/

https://reviews.llvm.org/D88328