[llvm] [DAG] Change `isExtractSubvectorCheap` into `getExtractSubvectorCost` (PR #213614)

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Mon Aug 3 16:51:03 PDT 2026

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Shoreshen wrote:

Hi @RKSimon @arsenm , I updated and for X86 and AArch64 that only index 0 is free, others are cheap

https://github.com/llvm/llvm-project/pull/213614

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