[all-commits] [llvm/llvm-project] 910d2d: [SLP]Fix PR88103: consider the sign of the compare...

Alexey Bataev via All-commits all-commits at lists.llvm.org
Tue Apr 9 10:55:18 PDT 2024


  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 910d2de357de8a490cac3ecbd27196356fe1f2a3
      https://github.com/llvm/llvm-project/commit/910d2de357de8a490cac3ecbd27196356fe1f2a3
  Author: Alexey Bataev <a.bataev at outlook.com>
  Date:   2024-04-09 (Tue, 09 Apr 2024)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
    M llvm/test/Transforms/SLPVectorizer/X86/zext-incoming-for-neg-icmp.ll

  Log Message:
  -----------
  [SLP]Fix PR88103: consider the sign of the compare for non-negative operands.

Need to improve detection of number of bits, required for the operand,
before doing a reduction. If the instruction is incoming operand of the
signed compare, need to consider adding an extra bit for signedness.



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