llvm-project

18627e99 - Revert "[SLP] Emit reduction instead of 2 extracts + scalar op, when vectorizing operands (#147583)"

Revert "[SLP] Emit reduction instead of 2 extracts + scalar op, when vectorizing operands (#147583)" This reverts commit ac4a38e9bd573a173432b89cbef7cce7a48e7907. This breaks the RVV builders (MicroBenchmarks/ImageProcessing/Blur/blur.test and MultiSource/Benchmarks/tramp3d-v4/tramp3d-v4.test from llvm-test-suite) and reportedly SPEC Accel2023 <https://github.com/llvm/llvm-project/pull/147583#issuecomment-3057183138>.