From cbd3cdd2397b31a34c8af403811d06aa94149b40 Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Tue, 14 Mar 2006 19:31:24 +0000
Subject: [PATCH] add a note

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26762 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Target/README.txt | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/lib/Target/README.txt b/lib/Target/README.txt
index 000fdded169..c19dc7e308d 100644
--- a/lib/Target/README.txt
+++ b/lib/Target/README.txt
@@ -113,3 +113,11 @@ for 1,2,4,8 bytes.
 
 //===---------------------------------------------------------------------===//
 
+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.
+
-- 
2.34.1