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-rw-r--r--lib/Analysis/IPA/Andersens.cpp6
1 files changed, 6 insertions, 0 deletions
diff --git a/lib/Analysis/IPA/Andersens.cpp b/lib/Analysis/IPA/Andersens.cpp
index 371a8a0dee..8ccefe1727 100644
--- a/lib/Analysis/IPA/Andersens.cpp
+++ b/lib/Analysis/IPA/Andersens.cpp
@@ -41,6 +41,12 @@
// pointers. If we find that an internal function's address escapes outside of
// the program, we update this assumption.
//
+// Future Improvements:
+// This implementation of Andersen's algorithm is extremely slow. To make it
+// scale reasonably well, the inclusion constraints could be sorted (easy),
+// offline variable substitution would be a huge win (straight-forward), and
+// online cycle elimination (trickier) might help as well.
+//
//===----------------------------------------------------------------------===//
#define DEBUG_TYPE "anders-aa"