add a note
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26762 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/README.txt b/lib/Target/README.txt
index 000fdde..c19dc7e 100644
--- a/lib/Target/README.txt
+++ b/lib/Target/README.txt
@@ -113,3 +113,11 @@
//===---------------------------------------------------------------------===//
+This code:
+int rot(unsigned char b) { int a = ((b>>1) ^ (b<<7)) & 0xff; return a; }
+
+Can be improved in two ways:
+
+1. The instcombiner should eliminate the type conversions.
+2. The X86 backend should turn this into a rotate by one bit.
+