[all-commits] [llvm/llvm-project] dd2a6d: [InstCombine] Fold memchr of sequences of same cha...

[Martin Sebor via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: dd2a6d78ee1d8b38960e0767b0d6dfd2e84543a4
      https://github.com/llvm/llvm-project/commit/dd2a6d78ee1d8b38960e0767b0d6dfd2e84543a4
  Author: Martin Sebor <msebor at redhat.com>
  Date:   2022-06-07 (Tue, 07 Jun 2022)

  Changed paths:
    M llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp
    A llvm/test/Transforms/InstCombine/memchr-6.ll
    M llvm/test/Transforms/InstCombine/memchr.ll
    A llvm/test/Transforms/InstCombine/strchr-3.ll

  Log Message:
  -----------
  [InstCombine] Fold memchr of sequences of same characters

Enhance memchr libcall folder to handle constant arrays consisting
of one or two sequences of cosecutive equal characters.

Reviewed By: nikic

Differential Revision: https://reviews.llvm.org/D126515