add a note
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31429 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/README.txt b/lib/Target/README.txt
index 4d2d4b6..7285c1b 100644
--- a/lib/Target/README.txt
+++ b/lib/Target/README.txt
@@ -331,4 +331,10 @@
The SingleSource/Benchmarks/Shootout-C++/hash and hash2 tests have examples of
this construct.
+
+//===---------------------------------------------------------------------===//
+
+Instcombine misses several of these cases (see the testcase in the patch):
+http://gcc.gnu.org/ml/gcc-patches/2006-10/msg01519.html
+
//===---------------------------------------------------------------------===//