[llvm-commits] [PATCH] Relax BUILD_VECTOR -> SHUFFLE transformation if INSERT_VECTOR_ELT is legal

[Michael Liao]

Hi

That attached patch ralexes the transformation from BUILD_VECTOR to
SHUFFLE by considering whether target supports INSERT_VECTOR_ELT or not.
If target claims it support that, we will continue the transformation if
one element is found to be inserted. This assumes SHUFFLE +
INSERT_VECTOR_ELT is better than BUILD_VECTOR entirely.

Thanks for your review.

Yours
- Michael

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