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

[pangqingyuan1991 at 163 dot com]

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

--- Comment #4 from 庞庆源 <pangqingyuan1991 at 163 dot com> ---
(In reply to Marc Glisse from comment #3)
> (In reply to 庞庆源 from comment #2)
> > gcc pmalloc.c -O2 -o ppp -ldl  -fno-tree-loop-distribute-patterns
> > -fno-strict-aliasing
> > Still not work.
> 
> -fno-builtin (the malloc+memset -> calloc is not part of loop distribution)
> 
> > Why I don't see stack overflow if this will trigger function loop calling
> 
> tail call?

-fno-builtin is the solution, thanks!