The ARM64 backend already supports some NEON instructions with asymmetric typed operands, like Add/Subtract Long operations (SADDL/UADDL/SSUBL/USUBL). Auto-Vectorizer supports more NEON instructions with asymmetric operands Including a tagged subject title, detailed description of the issue, and a simple repro simplifies our analysis work and helps us deliver a fix more quickly.

This, optimize neon right shift into cmp, is an example of good feedback.

The feedback helps us prioritize work items in our backlog. Let’s review some interesting optimizations in this blog.īefore diving into technical details, we’d encourage you to create feedback here at Developer Community if you have found performance issues. These optimizations improved code-generation for both scalar ISA and SIMD ISA (NEON). In the last couple of months, the Microsoft C++ team has been working on improving MSVC ARM64 backend performance and we are excited to have a couple of optimizations available in the Visual Studio 2022 version 1 7.6.

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