[Bug tree-optimization/125221] x86-64 optimization: Use 32-bit popcnt instruction if operand is known to fit 32 bit integer

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=125221

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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           Keywords|                            |easyhack

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
ISTR there are few match.pd patterns around this.  Possibly range checks can be
employed as well.