[llvm] [MacroFusion] Support multiple predicators (PR #72219)

[Craig Topper via llvm-commits]

topperc wrote:

If we're already going to have a bitset of enabled macrofusions, why can't we have a single tblgenerated function that checks each bit and calls the function for a particular macrofusion if that bit is enabled. Why do we need to translate the bitset into a vector of function pointers?

https://github.com/llvm/llvm-project/pull/72219