make the inliner do less work for leaf functions.
llvm-svn: 101846
diff --git a/llvm/lib/Transforms/IPO/Inliner.cpp b/llvm/lib/Transforms/IPO/Inliner.cpp
index 0791854..6c732d2 100644
--- a/llvm/lib/Transforms/IPO/Inliner.cpp
+++ b/llvm/lib/Transforms/IPO/Inliner.cpp
@@ -333,6 +333,10 @@
DEBUG(dbgs() << ": " << CallSites.size() << " call sites.\n");
+ // If there are no calls in this function, exit early.
+ if (CallSites.empty())
+ return false;
+
// Now that we have all of the call sites, move the ones to functions in the
// current SCC to the end of the list.
unsigned FirstCallInSCC = CallSites.size();