[llvm] [TargetLowering] Lower ldexp into target supported instructions (PR #67552)

[via llvm-commits]

huhu233 wrote:

> Sorry when I said patch I should have said pull request. Can you split the two patches into separate prs, so they can be reviewed separately. I think what you have for AArch64 looks OK to me

Hi, @davemgreen , thanks for your reply. Do you mean split these two commits into two Pull Request? If so, I'll remove the commit about X86 in this Patch, and create another Pull Request for it.

https://github.com/llvm/llvm-project/pull/67552