[PATCH] D67986: [InstCombine] snprintf (d, size, "%s", s) -> memccpy (d, s, '\0', size - 1), d[size - 1] = 0
Fangrui Song via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Wed Oct 9 19:36:11 PDT 2019
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MaskRay added a comment.
This transformation seems to increase code size significantly. Is the snprintf "%s" pattern common enough? I suspect most projects have already used memccpy, stpncpy, strscpy, or strlcpy. For the few that don't, the performance probably does not matter.
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https://reviews.llvm.org/D67986/new/
https://reviews.llvm.org/D67986
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