[inliner]: Refactor inline deferring logic into its own method /NFC

The implemented heuristic has a large body of code which better sits
in its own function for better readability. It also allows adding more
heuristics easier in the future.

llvm-svn: 268107

1 files changed, 4 insertions, 0 deletions

diff --git a/llvm/include/llvm/Transforms/IPO/InlinerPass.h b/llvm/include/llvm/Transforms/IPO/InlinerPass.h
index 40766c6f8b8..111bc860aba 100644
--- a/llvm/include/llvm/Transforms/IPO/InlinerPass.h
+++ b/llvm/include/llvm/Transforms/IPO/InlinerPass.h
@@ -69,6 +69,10 @@ private:
   /// shouldInline - Return true if the inliner should attempt to
   /// inline at the given CallSite.
   bool shouldInline(CallSite CS);
+  /// Return true if inlining of CS can block the caller from being
+  /// inlined which is proved to be more beneficial. \p IC is the
+  /// estimated inline cost associated with callsite \p CS.
+  bool shouldBeDeferred(Function *Caller, CallSite CS, InlineCost IC);
 
 protected:
   AssumptionCacheTracker *ACT;