[Bug target/86131] powerpc: gcc uses costly multiply instead of shift left

[segher at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86131

Segher Boessenkool <segher at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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                 CC|                            |segher at gcc dot gnu.org

--- Comment #1 from Segher Boessenkool <segher at gcc dot gnu.org> ---
A multiply is cost 2 for mpccore.  Expand creates a single "mulli ..,-8"
for this.  And no other RTL pass will break this apart again.