https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102306
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Component|target |rtl-optimization
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
But it's definitely combine duplicating the volatile MEM:
- 6: r109:QI=[r111:SI]
- REG_DEAD r111:SI
- 7: r112:SI=zero_extend(r109:QI)
+ 6: r109:QI=[%i0:SI]
+ 7: r112:SI=zero_extend([%i0:SI])
+ REG_DEAD %i0:SI
