[Bug tree-optimization/22326] promotions (from float to double) are not removed when they should be able to

[luoxhu at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=22326

--- Comment #10 from luoxhu at gcc dot gnu.org ---
Even we could optimize fabs to fabsf, it doesn't help here as y and z are
already promoted to double, then we still need a large pattern to match the
MUL&PLUS expression in match.pd, so fabs to fabsf seems not a reasonable
direction...