[all-commits] [llvm/llvm-project] 6c04b7: [AArch64] Optimize overflow checks for [s|u]mul.wi...

[Eli Friedman via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 6c04b7dd4fb4bfcc5db10b844d6235abbb21b805
      https://github.com/llvm/llvm-project/commit/6c04b7dd4fb4bfcc5db10b844d6235abbb21b805
  Author: Eli Friedman <efriedma at quicinc.com>
  Date:   2021-07-12 (Mon, 12 Jul 2021)

  Changed paths:
    M llvm/lib/Target/AArch64/AArch64FastISel.cpp
    M llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
    M llvm/test/CodeGen/AArch64/arm64-xaluo.ll

  Log Message:
  -----------
  [AArch64] Optimize overflow checks for [s|u]mul.with.overflow.i32.

Saves one instruction for signed, uses a cheaper instruction for
unsigned.

Differential Revision: https://reviews.llvm.org/D105770