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[AArch64] Lower fixed-length vector_shuffle to SVE splat if possible
authorBenjamin Maxwell <benjamin.maxwell@arm.com>
Wed, 16 Nov 2022 11:20:48 +0000 (11:20 +0000)
committerCullen Rhodes <cullen.rhodes@arm.com>
Wed, 16 Nov 2022 11:47:27 +0000 (11:47 +0000)
commita95a8188e897df282b3cf1e79bd46ec095591a44
tree66924df13d6cc35a1a3ba1fa6566cdea7236b7abtree | snapshot
parent5d938eb6f79b16f55266dd23d5df831f552ea082commit | diff
[AArch64] Lower fixed-length vector_shuffle to SVE splat if possible

This adds an extra case to check if a vector_shuffle for a fixed-length
vector that's being lowered to SVE, is just a splat. Doing this avoids
a round trip to the stack and back for a few cases.

Reviewed By: c-rhodes

Differential Revision: https://reviews.llvm.org/D137966
llvm/lib/Target/AArch64/AArch64ISelLowering.cpp diff | blob | history
llvm/test/CodeGen/AArch64/sve-fixed-length-shuffles.ll diff | blob | history
llvm/test/CodeGen/AArch64/sve-fixed-length-splat-vector.ll diff | blob | history
llvm/test/CodeGen/AArch64/sve-streaming-mode-fixed-length-extract-subvector.ll diff | blob | history
llvm/test/CodeGen/AArch64/sve-streaming-mode-fixed-length-shuffle.ll diff | blob | history
Domain: System / Toolchain;