[all-commits] [llvm/llvm-project] 93c20b: [Attributor] Don't replace `AddrSpaceCast` with `C...

[Shilei Tian via All-commits]

  Branch: refs/heads/users/shiltian/do-not-replace-addrspacecast-with-constantpointernull
  Home:   https://github.com/llvm/llvm-project
  Commit: 93c20b208695d4d69334c80f2814be7c56213374
      https://github.com/llvm/llvm-project/commit/93c20b208695d4d69334c80f2814be7c56213374
  Author: Shilei Tian <i at tianshilei.me>
  Date:   2025-02-14 (Fri, 14 Feb 2025)

  Changed paths:
    M llvm/lib/Transforms/IPO/AttributorAttributes.cpp
    A llvm/test/Transforms/Attributor/do-not-replace-addrspacecast-with-constantpointernull.ll

  Log Message:
  -----------
  [Attributor] Don't replace `AddrSpaceCast` with `ConstantPointerNull`

`ConstantPointerNull` represents a pointer with value 0, but it doesn’t
necessarily mean a nullptr. `ptr addrspace(x) null` is not the same as
`addrspacecast (ptr null to ptr addrspace(x))` if the nullptr in AS x is not
zero. Therefore, we can't simply replace it.

Fixes #115083.



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