[ThinLTO] Don't re-analyze callee at same threshold unnecessarily

This should just be a compile-time change. Correct the check for whether
we have already analyzed the callee when making summary based decisions.
There is no need to reprocess one at the same threshold as when it was
last processed.

llvm-svn: 269251

llvm/lib/Transforms/IPO/FunctionImport.cpp

@@ -288,7 +288,7 @@ static void computeImportForFunction(
     /// Since the traversal of the call graph is DFS, we can revisit a function
     /// a second time with a higher threshold. In this case, it is added back to
     /// the worklist with the new threshold.
-    if (ProcessedThreshold && ProcessedThreshold > Threshold) {
+    if (ProcessedThreshold && ProcessedThreshold >= Threshold) {
       DEBUG(dbgs() << "ignored! Target was already seen with Threshold "
                    << ProcessedThreshold << "\n");
       continue;