------- Comment #3 from bonzini at gnu dot org 2006-12-01 11:04 -------
We need multiple steps here to solve this bug and 17687:
1) change sincos (x, &s, &c) to
sincos (x, &t1, &t2);
s = t1;
c = t2;
Don't know the best place to do this.
2) alternatively, change sincos (x, &s, &c) to
v2df = vec_sincos (x)
*s = v2df[0]
*c = v2df[1]
This needs to be done at tree->rtl expansion time, because we don't have access
to v2df[N] at tree level.
3) perform strength reduction of sin+cos to sincos. I believe it has to be
done in a special pass (like CSE reciprocals), and that's actually why the file
was named tree-ssa-_math-opts_.c rather than tree-ssa-recip.c. This could be
the place to do (1) too.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30038
