llvm-project

6632b2f3 - [AArch64] Prepare for split ZPR and PPR area allocation (NFCI) (#142391)

[AArch64] Prepare for split ZPR and PPR area allocation (NFCI) (#142391) This patch attempts to refactor AArch64FrameLowering to allow the size of the ZPR and PPR areas to be calculated separately. This will be used by a subsequent patch to support allocating ZPRs and PPRs to separate areas. This patch should be an NFC and is split out to make later functional changes easier to spot. Co-authored-by: Kerry McLaughlin <kerry.mclaughlin@arm.com>