[llvm] [llvm][gvn-sink] Don't try to sink inline asm (PR #138414)

[Nikita Popov via llvm-commits]

https://github.com/nikic commented:

This seems like something that canReplaceOperandWithVariable() should be handling -- why doesn't it? Is it because the `!isa<Constant>` bails out before we get to the inline asm check?

https://github.com/llvm/llvm-project/pull/138414