[PATCH] D35644: [PEI] Separate saving and restoring CSRs into different functions. NFC

[Francis Visoiu Mistrih via Phabricator via llvm-commits]

thegameg created this revision.

Split `insertCSRSpillsAndRestores` into `insertCSRSaves` + `insertCSRRestores`.

Refactored the restore part to use indices instead of multiple iterators.

This is mostly useful for future shrink-wrapping improvements where we want to save / restore a specific part of the CSRs in a specific block.


https://reviews.llvm.org/D35644

Files:
  lib/CodeGen/PrologEpilogInserter.cpp

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