Clear CachedFunctionInfo upon Pass::releaseMemory. Because ValueMap will abort
on RAUW of functions, this is a correctness issue instead of a mere memory
usage problem.


No testcase until the new MergeFunctions can land.

llvm-svn: 103653
diff --git a/llvm/lib/Analysis/InlineCost.cpp b/llvm/lib/Analysis/InlineCost.cpp
index 6271371..10c2d79 100644
--- a/llvm/lib/Analysis/InlineCost.cpp
+++ b/llvm/lib/Analysis/InlineCost.cpp
@@ -455,6 +455,11 @@
   else
     CallerMetrics.NumInsts = 0;
   
-  // We are not updating the argumentweights. We have already determined that
+  // We are not updating the argument weights. We have already determined that
   // Caller is a fairly large function, so we accept the loss of precision.
 }
+
+/// clear - empty the cache of inline costs
+void InlineCostAnalyzer::clear() {
+  CachedFunctionInfo.clear();
+}