https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93843
--- Comment #9 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Richard Sandiford <rsand...@gcc.gnu.org>: https://gcc.gnu.org/g:b6268016bf46dd63227dcbb73d13c30a3b4b9d2a commit r10-6863-gb6268016bf46dd63227dcbb73d13c30a3b4b9d2a Author: Richard Sandiford <richard.sandif...@arm.com> Date: Tue Feb 25 19:20:58 2020 +0000 optabs: Don't use scalar conversions for vectors [PR93843] In this PR we had a conversion between two integer vectors that both had scalar integer modes. We then tried to implement the conversion using the scalar optab for those modes, instead of doing the conversion elementwise. I wondered about letting through scalar modes for single-element vectors, but I don't have any evidence that that's useful/necessary, so it seemed better to keep things simple. 2020-02-26 Richard Sandiford <richard.sandif...@arm.com> gcc/ PR middle-end/93843 * optabs-tree.c (supportable_convert_operation): Reject types with scalar modes. gcc/testsuite/ PR middle-end/93843 * gcc.dg/vect/pr93843-1.c: New test. * gcc.dg/vect/pr93843-2.c: Likewise.
