[clang] [llvm] [IR] Avoid creating icmp/fcmp constant expressions (PR #92885)

[antoine moynault via cfe-commits]

antmox wrote:

Hello, some bots are broken after this patch:

- https://lab.llvm.org/buildbot/#/builders/245/builds/24889
- https://lab.llvm.org/buildbot/#/builders/188/builds/46161

FAIL: Clang::weak-external.cpp

Could you look at this ?

https://github.com/llvm/llvm-project/pull/92885