[PATCH] D30059: Refactor InlinCost.cpp in preparation for estimated speedup heuristic.

[Easwaran Raman via Phabricator via llvm-commits]

eraman created this revision.

This includes the following refactoring that is useful for a subsequent patch that adds a new inlining heuristic:

- Factor out the code in instruction visitors that checks if an instruction evaluates to a constant.
- Add a method to accumulate the cost of inlining.
- Make isGEPOffsetConstant (which is called once) into a lambda.
- Move a block of code in visitSwitchInst to a lambda.

Some of these may not make much sense standalone, but are useful for the subsequent patch (to be posted shortly)


https://reviews.llvm.org/D30059

Files:
  lib/Analysis/InlineCost.cpp

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