https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107591
--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Aldy Hernandez from comment #6)
> FYI, the range operators have a relation field, so it should be able to tell
> you that both operands are equal with VREL_EQ (?). You could use that to
> optimize things.
You're right, at least for irange trio.op1_op2 () in the mult fold_range is
VREL_EQ and we could just go from that.
For frange perhaps it isn't as perfect because of signed zeros, so in
float
foo (float x, float y)
{
if (x == y)
return x * y;
return 42.0f;
}
trio.op1_op2 () could be VREL_EQ even if one is signed and the other unsigned
zero, and in that case -0.0 would need to be in the range too. But maybe that
is good enough for now.
