https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97071
--- Comment #9 from Richard Biener ---
(In reply to Segher Boessenkool from comment #8)
> (In reply to Richard Biener from comment #7)
> > Another possibility would be to do this on GIMPLE, creating parts of the
> > constant pool early with
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97071
--- Comment #8 from Segher Boessenkool ---
(In reply to Richard Biener from comment #7)
> Another possibility would be to do this on GIMPLE, creating parts of the
> constant pool early with CONST_DECLs and loads from them for constants that
>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97071
--- Comment #7 from Richard Biener ---
Another possibility would be to do this on GIMPLE, creating parts of the
constant pool early with CONST_DECLs and loads from them for constants that are
never legitimate (immediate) in instructions.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97071
Segher Boessenkool changed:
What|Removed |Added
Ever confirmed|0 |1
Status|UNCONFIRMED
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97071
--- Comment #5 from Richard Biener ---
Related and more difficult case where the add is first and we'd want to
change the load of -3 to a load of 3 so we can CSE the 3 for the
multiplication.
double foo (double x)
{
return (x + -3.) * 3.;
}
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97071
--- Comment #4 from Richard Biener ---
(In reply to Jakub Jelinek from comment #2)
> REG_EQUAL notes aren't really needed for that, we have functions to query
> the values from the constant pool for loads from it.
> So guess it is a matter of
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97071
--- Comment #3 from Richard Biener ---
So on targets where the FP constant loads are separate insns the load of the
negated constant could be replaced by a (neg:DF ..) which might even be
profitable when not combined with the following add. As
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97071
Jakub Jelinek changed:
What|Removed |Added
CC||jakub at gcc dot gnu.org
--- Comment #2
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97071
Richard Biener changed:
What|Removed |Added
Target||powerpc64le
Keywords|
