[all-commits] [llvm/llvm-project] eaa454: [X86][SSE] Add PACKSS SimplifyMultipleUseDemandedB...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: eaa4548459026707c909884219b5a5ca56678560
      https://github.com/llvm/llvm-project/commit/eaa4548459026707c909884219b5a5ca56678560
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2020-01-20 (Mon, 20 Jan 2020)

  Changed paths:
    M llvm/lib/Target/X86/X86ISelLowering.cpp
    M llvm/test/CodeGen/X86/vec-strict-inttofp-256.ll
    M llvm/test/CodeGen/X86/vec_int_to_fp.ll
    M llvm/test/CodeGen/X86/vector-constrained-fp-intrinsics.ll

  Log Message:
  -----------
  [X86][SSE] Add PACKSS SimplifyMultipleUseDemandedBits 'sign bit' handling.

Attempt to use SimplifyMultipleUseDemandedBits to simplify PACKSS if we're only after the sign bit.