[PATCH] D159190: [RISCV]Combine to make the fixed vector vadd of splats are scalarized

[Liao Chunyu via Phabricator via llvm-commits]

liaolucy added a comment.

Another solution, enabling the isExtractVecEltCheap when XlenVT == vector_element_type, It's working for pr65068.ll.

But I'm worried about the side effects of this approach. How to test fixed length vectors? Any suggestions?

Try to use the command: -march=rv64gcv -mllvm -riscv-v-vector-bits-max=128 -mllvm -riscv-v-vector-bits-min=128 , but the llvm ir scalable(not fixed length vectors.)


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https://reviews.llvm.org/D159190