[PATCH] D85345: [BuildLibCalls] Add noundef to standard I/O functions

[Johannes Doerfert via Phabricator via cfe-commits]

jdoerfert added a comment.

In D85345#2205691 <https://reviews.llvm.org/D85345#2205691>, @aqjune wrote:

> If things go well, I'll add noundef to other library functions such as utime, setenv, unsetenv, .... as well.
> For malloc/calloc/realloc/free, I'll think more about them. I guess it is safe to tag noundef to free's operand, but for malloc I'm not 100% sure...

What I think is helpful is the operand of a free and the return value of a {m,c,re}alloc. Arguably, you can give the latter anything but what falls out is better not undef or poison ;)


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