[llvm] [AArch64][GlobalISel] Use GPR for illegal fconstants and extend < 32 bit GPR constants to 32 bits (PR #178692)

[David Green via llvm-commits]

https://github.com/davemgreen commented:

Lets try and get this done. I never know what is best between fmov from a gpr and a load. I think it depends on the surrounding instructions and whether the load can miss, and there isn't a lot in it overall. It would be good to be consistent between different constant for fp and vectors.

https://github.com/llvm/llvm-project/pull/178692