[all-commits] [llvm/llvm-project] a4951e: Recommit "[X86] Don't always separate conditions i...

[goldsteinn via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: a4951eca40c070e020aa5d2689c08177fbeb780d
      https://github.com/llvm/llvm-project/commit/a4951eca40c070e020aa5d2689c08177fbeb780d
  Author: Noah Goldstein <goldstein.w.n at gmail.com>
  Date:   2024-03-04 (Mon, 04 Mar 2024)

  Changed paths:
    M llvm/include/llvm/CodeGen/TargetLowering.h
    M llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
    M llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.h
    M llvm/lib/Target/X86/X86ISelLowering.cpp
    M llvm/lib/Target/X86/X86ISelLowering.h
    M llvm/test/CodeGen/X86/2006-04-27-ISelFoldingBug.ll
    M llvm/test/CodeGen/X86/2007-08-09-IllegalX86-64Asm.ll
    M llvm/test/CodeGen/X86/2007-12-18-LoadCSEBug.ll
    M llvm/test/CodeGen/X86/2008-02-18-TailMergingBug.ll
    M llvm/test/CodeGen/X86/avx-cmp.ll
    M llvm/test/CodeGen/X86/block-placement.ll
    M llvm/test/CodeGen/X86/div-rem-pair-recomposition-unsigned.ll
    M llvm/test/CodeGen/X86/inline-spiller-impdef-on-implicit-def-regression.ll
    M llvm/test/CodeGen/X86/movmsk-cmp.ll
    M llvm/test/CodeGen/X86/or-branch.ll
    M llvm/test/CodeGen/X86/peephole-na-phys-copy-folding.ll
    M llvm/test/CodeGen/X86/pr33747.ll
    M llvm/test/CodeGen/X86/pr37025.ll
    M llvm/test/CodeGen/X86/pr38795.ll
    M llvm/test/CodeGen/X86/setcc-logic.ll
    M llvm/test/CodeGen/X86/swifterror.ll
    M llvm/test/CodeGen/X86/tail-dup-merge-loop-headers.ll
    M llvm/test/CodeGen/X86/tail-opts.ll
    M llvm/test/CodeGen/X86/test-shrink-bug.ll
    M llvm/test/CodeGen/X86/x86-shrink-wrap-unwind.ll

  Log Message:
  -----------
  Recommit "[X86] Don't always separate conditions in `(br (and/or cond0, cond1))` into separate branches" (2nd Try)

Changes in Recommit:
    1) Fix non-determanism by using `SmallMapVector` instead of
       `SmallPtrSet`.
    2) Fix bug in dependency pruning where we discounted the actual
       `and/or` combining the two conditions. This lead to over pruning.

Closes #81689



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