[Bug tree-optimization/87314] pointless comparison of malloc result to a string not eliminated

[glisse at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87314

--- Comment #3 from Marc Glisse <glisse at gcc dot gnu.org> ---
It isn't just with malloc, the following are not optimized either.

int f(){ int a; return &a=="hello"; }
int g(){ return "bye"=="hello"; }