https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105075
--- Comment #7 from rguenther at suse dot de <rguenther at suse dot de> --- On Mon, 28 Mar 2022, vries at gcc dot gnu.org wrote: > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105075 > > --- Comment #6 from Tom de Vries <vries at gcc dot gnu.org> --- > Created attachment 52698 > --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=52698&action=edit > Demonstrator patch with stepping stone patterns for combine > > (In reply to Tom de Vries from comment #2) > > Also, I wonder if defining a stepping-stone intermediate pattern could help > > combine. > > Well, that approach seems to work. Another possibility is to do this on GIMPLE where we detect widen multiplication and friends (tree-ssa-math-opts.cc:pass_optimize_widening_mul).
