[all-commits] [llvm/llvm-project] c1a396: [X86] Add APX imulzu support. (#116806)

[Daniel Zabawa via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: c1a3960abe5ca316e9a26e87cdc3a7f94e420dc6
      https://github.com/llvm/llvm-project/commit/c1a3960abe5ca316e9a26e87cdc3a7f94e420dc6
  Author: Daniel Zabawa <daniel.zabawa at intel.com>
  Date:   2024-11-26 (Tue, 26 Nov 2024)

  Changed paths:
    M llvm/lib/Target/X86/X86ISelLowering.cpp
    M llvm/lib/Target/X86/X86InstrCompiler.td
    M llvm/lib/Target/X86/X86InstrPredicates.td
    A llvm/test/CodeGen/X86/apx/imulzu.ll

  Log Message:
  -----------
  [X86] Add APX imulzu support. (#116806)

Add patterns to select 16b imulzu with -mapx-feature=zu, including
folding of zero-extends of the result. IsDesirableToPromoteOp is changed
to leave 16b multiplies by constant un-promoted, as imulzu will not
cause partial-write stalls.



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