[all-commits] [llvm/llvm-project] 3e0f30: [SPARC] Zero-extend the operands when doing UMULO ...

[Koakuma via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 3e0f3041cc1abe977edd288525c62da8c28219e5
      https://github.com/llvm/llvm-project/commit/3e0f3041cc1abe977edd288525c62da8c28219e5
  Author: Koakuma <koachan at protonmail.com>
  Date:   2021-11-14 (Sun, 14 Nov 2021)

  Changed paths:
    M llvm/lib/Target/Sparc/SparcISelLowering.cpp
    M llvm/test/CodeGen/SPARC/64cond.ll
    A llvm/test/CodeGen/SPARC/smulo-128-legalisation-lowering.ll
    M llvm/test/CodeGen/SPARC/umulo-128-legalisation-lowering.ll

  Log Message:
  -----------
  [SPARC] Zero-extend the operands when doing UMULO on 64-bit integers

On SPARC, S/UMULO operation on 64-bit integers works by extending the value to 128-bit, then doing a multiplication and checking the upper half of the result.
This makes UMULO works correctly by putting a zero in the upper half rather than doing a sign extension.

Reviewed By: LemonBoy

Differential Revision: https://reviews.llvm.org/D110555