[llvm] Allow Specifying SGMasks for Inline Asm (PR #155491)

[Patrick Simmons via llvm-commits]

linuxrocks123 wrote:

@arsenm when you have a fer minutes, I'd appreciate a close review of lines 2410 to 2433.  I'm not too familiar with our ISA, so I'm not sure I am doing the inference right.  I also asked you a question in the comments there.

https://github.com/llvm/llvm-project/pull/155491