[llvm] [AArch64][GlobalISel] Combine G_EXTRACT_VECTOR_ELT and G_BUILD_VECTOR sequences into G_SHUFFLE_VECTOR (PR #110545)

[via llvm-commits]

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@@ -4205,6 +4218,76 @@ void CombinerHelper::applyExtractVecEltBuildVec(MachineInstr &MI,
   replaceSingleDefInstWithReg(MI, Reg);
 }
 
+bool CombinerHelper::matchCombineExtractToShuffle(
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ValentijnvdBeek wrote:

Thanks for the suggestion, I am now avoiding making a shufflevector after input from Amara. But I will be sure to check this if I need to make a shufflevector in the future. 

https://github.com/llvm/llvm-project/pull/110545