[all-commits] [llvm/llvm-project] bca846: [AArch64] Improve mull generation (#114997)

[David Green via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: bca846d462e989a6e7a2ef085dbf367aeca106bd
      https://github.com/llvm/llvm-project/commit/bca846d462e989a6e7a2ef085dbf367aeca106bd
  Author: David Green <david.green at arm.com>
  Date:   2024-11-20 (Wed, 20 Nov 2024)

  Changed paths:
    M llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
    M llvm/test/CodeGen/AArch64/aarch64-smull.ll

  Log Message:
  -----------
  [AArch64] Improve mull generation (#114997)

This attempts to clean up and improve where we generate smull/umull
using known-bits. For v2i64 types (where no mul is present), we try to
create mull more aggressively to avoid scalarization.



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