https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83253
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
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CC| |hubicka at gcc dot gnu.org,
| |uros at gcc dot gnu.org
--- Comment #13 from Richard Biener <rguenth at gcc dot gnu.org> ---
Indeed, looks like a target issue to me. IIRC nocona (aka pentium4) had pretty
absymal shift cost but then x * 3 is two adds and x * 4 is two adds as well...
(would point at a expmed mult expansion issue). On x86 for SImode with -m32
you could even use lea for x * 4.
Maybe x86 people want to investigate (not for nocona but for -m32, nobody cares
about nocona anymore...).
