[all-commits] [llvm/llvm-project] f82902: [X86] Fold (f16 bitcast extract_vectorelt(v, 0)) to...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: f82902fef4a004a7f26d49448e66b2dbeed4d692
      https://github.com/llvm/llvm-project/commit/f82902fef4a004a7f26d49448e66b2dbeed4d692
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2025-02-06 (Thu, 06 Feb 2025)

  Changed paths:
    M llvm/lib/Target/X86/X86ISelLowering.cpp
    M llvm/test/CodeGen/X86/bfloat.ll
    M llvm/test/CodeGen/X86/canonicalize-vars-f16-type.ll
    M llvm/test/CodeGen/X86/fminimumnum-fmaximumnum.ll
    M llvm/test/CodeGen/X86/fold-int-pow2-with-fmul-or-fdiv.ll
    M llvm/test/CodeGen/X86/fp-round.ll
    M llvm/test/CodeGen/X86/fp-roundeven.ll
    M llvm/test/CodeGen/X86/fp-strict-scalar-fp16.ll
    M llvm/test/CodeGen/X86/fp-strict-scalar-inttofp-fp16.ll
    M llvm/test/CodeGen/X86/fp-strict-scalar-round-fp16.ll
    M llvm/test/CodeGen/X86/half.ll
    M llvm/test/CodeGen/X86/pr31088.ll
    M llvm/test/CodeGen/X86/select-narrow-int-to-fp.ll
    M llvm/test/CodeGen/X86/vector-half-conversions.ll

  Log Message:
  -----------
  [X86] Fold (f16 bitcast extract_vectorelt(v,0)) to (extract_vectorelt (v8f16 bitcast(v,0))) (#125877)

Also handles possible truncations from i32 to i16.

Cleans up some of the poor codegen identified in #98630



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