[llvm] [FreeBSD] Mark __stack_chk_guard dso_local except for PPC64 (PR #86665)

[Justin Cady via llvm-commits]

justincady wrote:

> We should have a powerpc64 freebsd test as well, if we haven't yet.

Good news: I believe this case is covered by llvm/test/CodeGen/PowerPC/stack-protector.ll. I tested it by deleting the `!(TM.getTargetTriple().isPPC64() && TM.getTargetTriple().isOSFreeBSD())` conditional entirely, which caused that test to fail.

https://github.com/llvm/llvm-project/pull/86665