[Bug tree-optimization/32367] [4.3 Regression] internal compiler error: in build_polynomial_chrec, at tree-chrec.h:113

["pinskia at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #7 from pinskia at gcc dot gnu dot org  2007-06-16 21:16 -------
But I am not 100% the rest of the correct is correct.
Daniel/Pop,
  Could you look into my patch to see if it is correct?  My pointer_plus
exposed a latent bug with chrec_component_in_loop_num:
for 
initial_condition_in_loop_num({{&BinomialCoefficients[0], +, 4}_1, +, {0, +,
4}_1}_1, 1)
We were creating:
{&BinomialCoefficients[0], +, {&BinomialCoefficients[0], +, 4}_1 }_1

Which does not make sense at all. because the second iteration of the loop, we
would have
&BinomialCoefficients[0] + &BinomialCoefficients[0] which does not make sense.


Do you agree that for
initial_condition_in_loop_num({{&BinomialCoefficients[0], +, 4}_1, +, {0, +,
4}_1}_1, 1)

Should return &BinomialCoefficients[0] ?

Thanks,
Andrew Pinski


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |dberlin at gcc dot gnu dot
                   |                            |org, spop at gcc dot gnu dot
                   |                            |org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32367