possible switch lowering improvement.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45720 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/README.txt b/lib/Target/README.txt
index 26bc5e8319193ba1d2e676c7c1cf0198edf86c13..e6178894afedecfb8172d4bd0923fd27b2211f39 100644 (file)
--- a/lib/Target/README.txt
+++ b/lib/Target/README.txt
@@ -519,3 +519,8 @@ function, they should be sunk into the ones that do.
 In this case, whole-function-isel would also handle this.
 
 //===---------------------------------------------------------------------===//
+
+Investigate lowering of sparse switch statements into perfect hash tables:
+http://burtleburtle.net/bob/hash/perfect.html
+
+//===---------------------------------------------------------------------===//