[llvm] [win][x64] Fix crash when enabling Windows Control Flow Guard (PR #177294)

[Daniel Paoliello via llvm-commits]

dpaoliello wrote:

I haven't seen any difference with and without asserts.

If I use Application Verifier, then I can get Clang to crash every time, otherwise it is flaky.

For llc, are there command line options that I'm missing vs Clang? I know that Clang uses Fast ISel by default, but llc doesn't. Is there any other differences?

https://github.com/llvm/llvm-project/pull/177294