[all-commits] [llvm/llvm-project] dfbefe: [CostModel][X86] Add missing AVX1 costs for PMULUD...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: dfbefe4a65019fd8dc2ff8257b11519808a27a13
      https://github.com/llvm/llvm-project/commit/dfbefe4a65019fd8dc2ff8257b11519808a27a13
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2025-09-08 (Mon, 08 Sep 2025)

  Changed paths:
    M llvm/lib/Target/X86/X86TargetTransformInfo.cpp
    M llvm/test/Analysis/CostModel/X86/mul64.ll

  Log Message:
  -----------
  [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



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