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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https://reviews.llvm.org/D85345
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