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ARM64: Redundant movs can be eliminiated #35252

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kunalspathak opened this issue Apr 21, 2020 · 0 comments · Fixed by #38179
Closed

ARM64: Redundant movs can be eliminiated #35252

kunalspathak opened this issue Apr 21, 2020 · 0 comments · Fixed by #38179
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arch-arm64 area-CodeGen-coreclr CLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI optimization
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Future

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@kunalspathak
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I have seen below pattern in generated code for framework libraries. We can eliminate 2nd move.

       AA0003F8          mov     x24, x0
       AA1803E0          mov     x0, x24

There are approx. 27K such patterns in 16K methods. Details in redundant-mov-2.txt.
@kunalspathak kunalspathak added arch-arm64 area-CodeGen-coreclr CLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI labels Apr 21, 2020
@Dotnet-GitSync-Bot Dotnet-GitSync-Bot added the untriaged New issue has not been triaged by the area owner label Apr 21, 2020
@BruceForstall BruceForstall added this to the Future milestone Apr 21, 2020
@BruceForstall BruceForstall added optimization and removed untriaged New issue has not been triaged by the area owner labels Apr 21, 2020
@kunalspathak kunalspathak mentioned this issue May 5, 2020
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@kunalspathak kunalspathak mentioned this issue Jun 20, 2020
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arch-arm64 area-CodeGen-coreclr CLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI optimization
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ARM64: Eliminate redundant opposite mov kunalspathak/runtime
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