llvm-project

dfbefe4a - [CostModel][X86] Add missing AVX1 costs for PMULUDQ v4i64 pattern (#157475)

[CostModel][X86] Add missing AVX1 costs for PMULUDQ v4i64 pattern (#157475) We need to account for AVX1 targets splitting 256-bit PMULUDQ style patterns - we included a AVX2 cost, but missed out AVX1 despite v4i64 being a legal type Noticed while working on #156568