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archived-llvm-mirror/test/CodeGen/AArch64
Nirav Dave 052700445a [DAG] Extend visitSCALAR_TO_VECTOR optimization to truncated vector.
Relanding after case to insert explicit truncation as necessary.

Allow SCALAR_TO_VECTOR of EXTRACT_VECTOR_ELT to reduce to
EXTRACT_SUBVECTOR of vector shuffle when output is smaller. Marginally
improves vector shuffle computations.

Reviewers: efriedma, RKSimon, spatel

Subscribers: javed.absar, llvm-commits

Differential Revision: https://reviews.llvm.org/D35566

llvm-svn: 310256
2017-08-07 14:07:49 +00:00
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