[Bug middle-end/90435] gcc generate infinite loop code when using -O2 or -O3

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90435

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Your implementation of calloc will be calling itself due to the optimization of
malloc followed by memset into calloc.

You need to use -fno-tree-loop-distribute-patterns for that case  since your
implementation of malloc calls calloc in some cases.

One other thing is you are most likely also violating C aliasing rules; try
-fno-strict-aliasing and see if that helps.