[Bug target/62011] False Data Dependency in popcnt instruction

rguenth at gcc dot gnu.org gcc-bugzilla@gcc.gnu.org
Tue Aug 5 09:07:00 GMT 2014


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

           What    |Removed                     |Added
           Keywords|                            |missed-optimization
             Target|X86_64-*-*                  |x86_64-*-*, i?86-*-*

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Please clarify - this is a defect in the CPU?  Can you point to an official

In which case we might want to adjust the scheduler description used for
GENERIC tuning (and for the specific broken CPUs).  Not sure if we want to
disable popcnt use completely.

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