[llvm] [InstCombine] Fix buggy transform in foldNestedSelects; PR 71330 (PR #71489)

[via llvm-commits]

================
@@ -0,0 +1,229 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 3
+; RUN: opt -O3 -S < %s | FileCheck %s
----------------
goldsteinn wrote:

Thanks :)

https://github.com/llvm/llvm-project/pull/71489