Should clang-cl require compiler-rt?

[llvmbot]

Bugzilla Link	25768
Version	unspecified
OS	Windows NT
Reporter	LLVM Bugzilla Contributor
CC	@rnk

Extended Description

clang-cl uses MSVC includes and libraries. Yet it sometimes requires additional functions from compiler-rt, for example

__int128 i;
i = i % 3;

requires _umodti3().

Is it OK for clang-cl to use functions from compiler-rt or should such usage be disabled?

[rnk]

This continues to come up, and I think we want the answer to be yes, we just need to make it happen.

[rnk]

Let's say this is a Duplicate of #25679.