https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110531
--- Comment #11 from Kewen Lin <linkw at gcc dot gnu.org> ---
(In reply to Hao Liu from comment #10)
> > foo is just an example for not getting inlined, the point here is extra
> > cost paid.
>
> My point is that the case is different from the original case in
> tree-vect-loop.cc. For example, change the case as following:
>
> __attribute__((noipa)) int foo(int *a) { *a == 1 ? return 1 : return 0;}
>
> That's similar to the original problem (the value of "a" is undefiend).
>
> I don't mean that "a" must be initialized in test(). We can also initalize
> "a" in foo, but should not use "a" before initialization. E.g.
>
> __attribute__((noipa)) int foo(int *a) {
> *a == 1;
> ...
> if (*a)
> }
>
> The above case has no problem.
Yeah, I got your point here, but my case above is mainly to show that we need
to pay a bit more cost to initialize variable (there foo is just a random one
which isn't inlined). Anyway, thanks for further clarifying.
