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[AVX-512] Improve lowering of inserting a single element into lowest element…

Description

[AVX-512] Improve lowering of inserting a single element into lowest element of a 512-bit vector of zeroes by using vmovq/vmovd/vmovss/vmovsd.

Details

Committed
ctopperAug 7 2016, 2:52 PM
Parents
rL277964: Mark LWG 2726 as complete. No code change needed.
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