another case Nate came up with

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25943 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/README.txt b/lib/Target/README.txt
index 32a2e7ccbd57f6a088c66bb284ef3932fb42a20e..d9091d0ca7698cb4e7ef3609d3898d2241d8cc6b 100644 (file)
--- a/lib/Target/README.txt
+++ b/lib/Target/README.txt
@@ -68,4 +68,7 @@ For dag combiner and instcombine:
 Fold: "A / (B << N)" where B is a power of 2, to "A >> (N + log2(B))".
 Fold: "A % (B << N)" where B is a power of 2, to "A & ((B << N) - 1)".
 
+int t(int X, int Y) { return 1 << (X+4); }  --> 16 << X
+
+
 //===---------------------------------------------------------------------===//