[all-commits] [llvm/llvm-project] c29647: [CostModel][X86] Reduce cost of vector selects on ...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: c2964746e3391360f1cbbfbfdb82e4c1e661c436
      https://github.com/llvm/llvm-project/commit/c2964746e3391360f1cbbfbfdb82e4c1e661c436
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2022-05-01 (Sun, 01 May 2022)

  Changed paths:
    M llvm/lib/Target/X86/X86TargetTransformInfo.cpp
    M llvm/test/Analysis/CostModel/X86/arith-sminmax.ll
    M llvm/test/Analysis/CostModel/X86/arith-ssat.ll
    M llvm/test/Analysis/CostModel/X86/arith-uminmax.ll
    M llvm/test/Analysis/CostModel/X86/arith-usat.ll
    M llvm/test/Analysis/CostModel/X86/fptoi_sat.ll
    M llvm/test/Analysis/CostModel/X86/fshl.ll
    M llvm/test/Analysis/CostModel/X86/fshr.ll
    M llvm/test/Analysis/CostModel/X86/intrinsic-cost-kinds.ll
    M llvm/test/Analysis/CostModel/X86/reduce-smax.ll
    M llvm/test/Analysis/CostModel/X86/reduce-smin.ll
    M llvm/test/Analysis/CostModel/X86/reduce-umax.ll
    M llvm/test/Analysis/CostModel/X86/reduce-umin.ll
    M llvm/test/Analysis/CostModel/X86/vselect-cost.ll
    M llvm/test/Transforms/LoopVectorize/X86/imprecise-through-phis.ll
    M llvm/test/Transforms/SLPVectorizer/X86/crash_cmpop.ll

  Log Message:
  -----------
  [CostModel][X86] Reduce cost of vector selects on SSE2/AVX1 targets

Based off the script from D103695, we were exaggerating the cost of the OR(AND(X,M),AND(Y,~M)) expansion using instruction count instead of effective throughput