[all-commits] [llvm/llvm-project] a4e475: [ExpandMemCmp] Recognize canonical form of (icmp s...

[Craig Topper via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: a4e47586b9c0566761b7fb704011da6ded823398
      https://github.com/llvm/llvm-project/commit/a4e47586b9c0566761b7fb704011da6ded823398
  Author: Craig Topper <craig.topper at sifive.com>
  Date:   2025-01-03 (Fri, 03 Jan 2025)

  Changed paths:
    M llvm/lib/CodeGen/ExpandMemCmp.cpp
    M llvm/test/CodeGen/AArch64/memcmp.ll
    M llvm/test/CodeGen/RISCV/memcmp.ll
    M llvm/test/CodeGen/X86/memcmp.ll

  Log Message:
  -----------
  [ExpandMemCmp] Recognize canonical form of (icmp sle/sge X, 0) in getMemCmpOneBlock. (#121540)

This code recognizes special cases where the result of memcmp is
compared with 0. If the compare is sle/sge, then InstCombine
canonicalizes to (icmp slt X, 1) or (icmp sgt X, -1). We should
recognize those patterns too.



To unsubscribe from these emails, change your notification settings at https://github.com/llvm/llvm-project/settings/notifications