[all-commits] [llvm/llvm-project] 4bcd81: [TargetLowering] Pull similar code out of the forc...

[Craig Topper via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 4bcd8184a093d2d9f0aad1053dbb1367891da6a5
      https://github.com/llvm/llvm-project/commit/4bcd8184a093d2d9f0aad1053dbb1367891da6a5
  Author: Craig Topper <craig.topper at sifive.com>
  Date:   2025-01-25 (Sat, 25 Jan 2025)

  Changed paths:
    M llvm/include/llvm/CodeGen/TargetLowering.h
    M llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp

  Log Message:
  -----------
  [TargetLowering] Pull similar code out of the forceExpandWideMUL into a helper. NFC (#124371)

These functions have similar code. One of them calculates the 2x width
full product from 2 sources. The other calculates the product from 2
sources that have low and high halves.

This patch introduces a new function that takes HiLHS and HiRHS as
optional values. If they are not null, they will be used in the
calculation of the Hi half. The Signed flag can only be set when
HiLHS/HiRHS are null.



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