[all-commits] [llvm/llvm-project] 6cfadd: [X86] Split rr/rm CVT schedules on SNB/HSW/BDW (#1...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 6cfaddfd52d088c15a61b8149f39505019c73458
      https://github.com/llvm/llvm-project/commit/6cfaddfd52d088c15a61b8149f39505019c73458
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2024-11-24 (Sun, 24 Nov 2024)

  Changed paths:
    M llvm/lib/Target/X86/X86SchedBroadwell.td
    M llvm/lib/Target/X86/X86SchedHaswell.td
    M llvm/lib/Target/X86/X86SchedSandyBridge.td
    M llvm/test/tools/llvm-mca/X86/Barcelona/resources-sse2.s
    M llvm/test/tools/llvm-mca/X86/Broadwell/resources-avx1.s
    M llvm/test/tools/llvm-mca/X86/Broadwell/resources-sse2.s
    M llvm/test/tools/llvm-mca/X86/Generic/resources-avx1.s
    M llvm/test/tools/llvm-mca/X86/Generic/resources-avx512.s
    M llvm/test/tools/llvm-mca/X86/Generic/resources-avx512vl.s
    M llvm/test/tools/llvm-mca/X86/Generic/resources-sse2.s
    M llvm/test/tools/llvm-mca/X86/Haswell/resources-avx1.s
    M llvm/test/tools/llvm-mca/X86/Haswell/resources-sse1.s
    M llvm/test/tools/llvm-mca/X86/Haswell/resources-sse2.s
    M llvm/test/tools/llvm-mca/X86/SandyBridge/resources-avx1.s
    M llvm/test/tools/llvm-mca/X86/SandyBridge/resources-sse2.s

  Log Message:
  -----------
  [X86] Split rr/rm CVT schedules on SNB/HSW/BDW (#117494)

The folded load variants almost never require Port5 for length changing conversions (just for SNB ymm cases), and don't typically use an extra uop for the load.

Confirmed with a mixture of Agner + uops.info comparisons.



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