[all-commits] [llvm/llvm-project] b5c94c: [X86] Split FLDEXP when AVX512 is not available (#...

[Evgenii Kudriashov via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: b5c94cfb1c12edc85a65be6299b0b9800b623492
      https://github.com/llvm/llvm-project/commit/b5c94cfb1c12edc85a65be6299b0b9800b623492
  Author: Evgenii Kudriashov <evgenii.kudriashov at intel.com>
  Date:   2026-07-09 (Thu, 09 Jul 2026)

  Changed paths:
    M llvm/lib/Target/X86/X86ISelLowering.cpp
    M llvm/test/CodeGen/X86/ldexp-avx512.ll

  Log Message:
  -----------
  [X86] Split FLDEXP when AVX512 is not available (#208292)

Mark the 512-bit types Custom only under useAVX512Regs(); otherwise
generic type legalization splits FLDEXP into the legal narrower halves
that LowerFLDEXP handles.

Add a LIT test for the v8f64 -> two 256-bit vscalefpd split.

Co-authored-by: Yanliang Mu <yanliang.mu at intel.com>



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