[Bug tree-optimization/94908] Failure to optimally optimize certain shuffle patterns

glisse at gcc dot gnu.org gcc-bugzilla@gcc.gnu.org
Fri May 1 21:24:06 GMT 2020


--- Comment #1 from Marc Glisse <glisse at gcc dot gnu.org> ---
Even if we write __builtin_shuffle, the vector lowering pass turns it into the
same code (constructor of BIT_FIELD_REFs), which seems to indicate that the
target does not handle this pattern.

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