[Bug target/12817] Altivec code generation error with setjmp

[segher at kernel dot crashing dot org]

PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12817



------- Additional Comments From segher at kernel dot crashing dot org  2003-10-30 13:44 -------
Subject: Re:  Altivec code generation error with setjmp

pinskia at gcc dot gnu dot org wrote:
> On powerpc-apple-darwin in 3.3.2 (20030908), I get:
>         mfspr r12,256
>         stw r12,-224(r1)
>         oris r12,r12,0xdfff
>         ori r12,r12,65535
>         mtspr 256,r12
> which looks right.

It does.

> on the mainline, GCC does not even save the altivec registers at all (why?).

Why should it save _any_ registers (that are not changed before the call
to setjmp()?  setjmp() will just save them again?