[clang] [llvm] [mlir] [IR] Explicitly specify target feature for module asm (PR #204548)

[Nikita Popov via cfe-commits]

nikic wrote:

> > Now they can be faithfully preserved, even when merging inline assembly from different modules with different features.
> 
> Is the merging just a union of the features?

The features are preserved per inline asm fragment. There can be inline asm fragments with different features.

https://github.com/llvm/llvm-project/pull/204548