[all-commits] [llvm/llvm-project] 18473e: [SLP]Do not require external uses for roots and si...

[Alexey Bataev via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 18473eb108e29c7c9d9fcb5d0d8c271948aca330
      https://github.com/llvm/llvm-project/commit/18473eb108e29c7c9d9fcb5d0d8c271948aca330
  Author: Alexey Bataev <5361294+alexey-bataev at users.noreply.github.com>
  Date:   2024-01-11 (Thu, 11 Jan 2024)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
    M llvm/test/Transforms/SLPVectorizer/X86/int-bitcast-minbitwidth.ll
    M llvm/test/Transforms/SLPVectorizer/X86/minbitwidth-multiuse-with-insertelement.ll
    M llvm/test/Transforms/SLPVectorizer/X86/minbitwidth-transformed-operand.ll
    M llvm/test/Transforms/SLPVectorizer/X86/root-trunc-extract-reuse.ll

  Log Message:
  -----------
  [SLP]Do not require external uses for roots and single use for other instructions in computeMinimumValueSizes. (#72679)

After changes, that does not require support from InstCombine, we can
drop some extra requirements for values-to-be-demoted. No need to check
for external uses for roots/other instructions, just check that the
  no non-vectorized insertelement instruction, which may require
  widening.

Review: https://github.com/llvm/llvm-project/pull/72679