r256129 - in /trunk/gcc: ChangeLog omp-expand.c...

[rsandifo@gcc.gnu.org]

Author: rsandifo
Date: Wed Jan  3 07:14:31 2018
New Revision: 256129

URL: https://gcc.gnu.org/viewcvs?rev=256129&root=gcc&view=rev
Log:
poly_int: omp_max_vf

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.

2018-01-03  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.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/omp-expand.c
    trunk/gcc/omp-general.c
    trunk/gcc/omp-general.h
    trunk/gcc/omp-low.c