[all-commits] [llvm/llvm-project] fc01b9: [CostModel][X86] Align v4i64 MUL costs on AVX1 tar...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: fc01b9bdf8b55f6b09f1dcaedf78dad62ff205c1
      https://github.com/llvm/llvm-project/commit/fc01b9bdf8b55f6b09f1dcaedf78dad62ff205c1
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2021-05-22 (Sat, 22 May 2021)

  Changed paths:
    M llvm/lib/Target/X86/X86TargetTransformInfo.cpp
    M llvm/test/Analysis/CostModel/X86/arith-fix.ll
    M llvm/test/Analysis/CostModel/X86/arith-overflow.ll
    M llvm/test/Analysis/CostModel/X86/arith.ll
    M llvm/test/Analysis/CostModel/X86/reduce-mul.ll
    M llvm/test/Analysis/CostModel/X86/rem.ll
    M llvm/test/Transforms/SLPVectorizer/X86/arith-fix.ll
    M llvm/test/Transforms/SLPVectorizer/X86/pr46983.ll

  Log Message:
  -----------
  [CostModel][X86] Align v4i64 MUL costs on AVX1 targets with worst case

Based on worst case of sandybridge (vs btver2 + bdver2) llvm-mca analysis - which is a lot less than what we were predicting (I think based off total uop count).