[all-commits] [llvm/llvm-project] 01d952: [SLP]Improve final minbitwidth analysis attempt.

[Alexey Bataev via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 01d9528ef989610e968386ea1f270698015d2410
      https://github.com/llvm/llvm-project/commit/01d9528ef989610e968386ea1f270698015d2410
  Author: Alexey Bataev <a.bataev at outlook.com>
  Date:   2024-04-08 (Mon, 08 Apr 2024)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
    M llvm/test/Transforms/SLPVectorizer/AArch64/extractelements-to-shuffle.ll
    M llvm/test/Transforms/SLPVectorizer/RISCV/trunc-to-large-than-bw.ll
    M llvm/test/Transforms/SLPVectorizer/X86/int-bitcast-minbitwidth.ll

  Log Message:
  -----------
  [SLP]Improve final minbitwidth analysis attempt.

Added part for demanded bits analysis in the IsPotentiallyTruncated to
improve minbitwidth analysis final attempts.

Metric: size..text

Program                                                                                                                                                size..text
                                                                                                                                                       results     results0    diff
                                                                           test-suite :: MultiSource/Benchmarks/MiBench/telecomm-gsm/telecomm-gsm.test    43069.00    42973.00 -0.2%
                                                                                  test-suite :: MultiSource/Benchmarks/mediabench/gsm/toast/toast.test    43066.00    42970.00 -0.2%

Extra trunc instructions are emitted to operate with <32 x i8> instead
of <32 x i16>, will be removed in the next patches.

Reviewers: RKSimon

Reviewed By: RKSimon

Pull Request: https://github.com/llvm/llvm-project/pull/87786



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