Thomas Koenig wrote:
Regarding PR 57073, the real case - I have never worked with
GIMPLE, so I have no real idea how to start this.
Any volunteers? Or should we handle this in the Fortran front
end after all?
I think one should do it in the middle end. Actually, it shouldn't be
that difficult. The starting point is gcc/builtins.c's fold_builtin_powi
- all ingredients are there; (1.0)**k, x**0, x**1 and x**(-1) are
already handled. Thus, only (-1)**k is missing. For "= (a)?(b):(c)"
one uses "fold_build3_loc (loc, COND_EXPR, ..." and to check whether a
real argument is -1, you can use "real_minus_onep".
How about writing your first middle end patch?
Tobias
