[all-commits] [llvm/llvm-project] 2657fe: [CostModel][X86] Fix funnel shift check prefixes

[Simon Pilgrim via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 2657fe1721c301e11269f38763d5d835f186143d
      https://github.com/llvm/llvm-project/commit/2657fe1721c301e11269f38763d5d835f186143d
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2021-07-22 (Thu, 22 Jul 2021)

  Changed paths:
    M llvm/test/Analysis/CostModel/X86/fshl.ll
    M llvm/test/Analysis/CostModel/X86/fshr.ll

  Log Message:
  -----------
  [CostModel][X86] Fix funnel shift check prefixes

We'd lost AVX1 test coverage due to bulldozer (XOP) trying to use the same check prefixes - we really need to fix the update script to avoid this!


  Commit: 4185c5502c81285206ea35172411966c8bd8bd30
      https://github.com/llvm/llvm-project/commit/4185c5502c81285206ea35172411966c8bd8bd30
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2021-07-22 (Thu, 22 Jul 2021)

  Changed paths:
    M llvm/lib/Target/X86/X86TargetTransformInfo.cpp
    M llvm/test/Analysis/CostModel/X86/div.ll
    M llvm/test/Analysis/CostModel/X86/fshl.ll
    M llvm/test/Analysis/CostModel/X86/fshr.ll
    M llvm/test/Analysis/CostModel/X86/rem.ll
    M llvm/test/Analysis/CostModel/X86/vshift-ashr-cost-inseltpoison.ll
    M llvm/test/Analysis/CostModel/X86/vshift-ashr-cost.ll
    M llvm/test/Analysis/CostModel/X86/vshift-lshr-cost-inseltpoison.ll
    M llvm/test/Analysis/CostModel/X86/vshift-lshr-cost.ll
    M llvm/test/Analysis/CostModel/X86/vshift-shl-cost-inseltpoison.ll
    M llvm/test/Analysis/CostModel/X86/vshift-shl-cost.ll

  Log Message:
  -----------
  [CostModel][X86] Adjust shift SSE4 legalized costs based on llvm-mca reports.

Update shl/lshr/ashr costs based on the worst case costs from the script in D103695 - many of the 128-bit shifts (usually where integer multiplies aren't used) have similar behaviour to AVX1 so we can merge them.


Compare: https://github.com/llvm/llvm-project/compare/14e34a83b0d2...4185c5502c81