https://gcc.gnu.org/bugzilla/show_bug.cgi?id=127107
--- Comment #1 from Konstantinos Eleftheriou <konstantinos.eleftheriou at vrull dot eu> --- This is a known limitation. The comment on `optimize_widening_mul_active_p` notes that "-fdisable-tree-widening_mul is not observed". We allowed this based on the documentation saying, for the enable/disable family of flags: "These options are intended for use for debugging GCC. Compiler users should use regular options for enabling/disabling passes instead.". FWIK there isn't any predicate to check for this before generating the wide multiplication. Should we fix this in some way?
