[all-commits] [llvm/llvm-project] 533b7c: [GlobalOpt] Don't replace the aliasee if it has ot...

[DianQK via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 533b7c1f6c696817df332cc7c9acbe3b454eadf2
      https://github.com/llvm/llvm-project/commit/533b7c1f6c696817df332cc7c9acbe3b454eadf2
  Author: DianQK <dianqk at dianqk.net>
  Date:   2023-04-27 (Thu, 27 Apr 2023)

  Changed paths:
    M llvm/lib/Transforms/IPO/GlobalOpt.cpp
    A llvm/test/Transforms/GlobalOpt/X86/alias-used-with-asm.ll
    M llvm/test/Transforms/GlobalOpt/alias-used-address-space.ll
    M llvm/test/Transforms/GlobalOpt/alias-used.ll
    M polly/test/Support/dumpfunction.ll

  Log Message:
  -----------
  [GlobalOpt] Don't replace the aliasee if it has other references.

As long as aliasee has `@llvm.used` or `@llvm.compiler.used` references, we cannot do the related replace or delete operations. Even if it is a Local Linkage, we cannot infer if there is no other use for it, such as asm or other future added cases.

Reviewed By: nikic

Differential Revision: https://reviews.llvm.org/D145293