[llvm] [AArch64][LoopIdiom] Disable LoopIdiomTransform when NoImplicitFloat is present (PR #87677)

[Craig Topper via llvm-commits]

topperc wrote:

LGTM, but I'd like @david-arm to agree.

implicitfloat attribute documentation from LangRef.

> Also inhibits optimizations that create SIMD/vector code and registers from scalar code such as vectorization or memcpy/memset optimization. This includes integer vectors. Vector instructions present in IR may still cause vector code to be generated.

https://github.com/llvm/llvm-project/pull/87677