[066/nnn] poly_int: omp_max_vf

[Jeff Law]

On 10/23/2017 11:27 AM, Richard Sandiford wrote:
> This patch makes omp_max_vf return a polynomial vectorization factor.
> We then need to be able to stash a polynomial value in
> OMP_CLAUSE_SAFELEN_EXPR too:
> 
>    /* If max_vf is non-zero, then we can use only a vectorization factor
>       up to the max_vf we chose.  So stick it into the safelen clause.  */
> 
> For now the cfgloop safelen is still constant though.
> 
> 
> 2017-10-23  Richard Sandiford  <richard.sandiford@linaro.org>
> 	    Alan Hayward  <alan.hayward@arm.com>
> 	    David Sherwood  <david.sherwood@arm.com>
> 
> gcc/
> 	* omp-general.h (omp_max_vf): Return a poly_uint64 instead of an int.
> 	* omp-general.c (omp_max_vf): Likewise.
> 	* omp-expand.c (omp_adjust_chunk_size): Update call to omp_max_vf.
> 	(expand_omp_simd): Handle polynomial safelen.
> 	* omp-low.c (omplow_simd_context): Add a default constructor.
> 	(omplow_simd_context::max_vf): Change from int to poly_uint64.
> 	(lower_rec_simd_input_clauses): Update accordingly.
> 	(lower_rec_input_clauses): Likewise.
OK.
jeff