[llvm] [AArch64] Optimize more floating-point round+convert combinations into fcvt instructions (PR #170018)

[via llvm-commits]

https://github.com/Lukacma commented:

So for scalar case you only added non-bitcast tests for saturating nodes. We should also test for non-saturating conversions and also for GlobalISel, since those are also covered by this patch

https://github.com/llvm/llvm-project/pull/170018