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 4d2d4b623d7d104782ea2402e9feb1d58ccde97c..7285c1b0684a0adb151bd231b4aac0097617b59a 100644 (file)
--- a/lib/Target/README.txt
+++ b/lib/Target/README.txt
@@ -331,4 +331,10 @@ for Instruction::UDiv (around line 4447) for more details.
 
 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
+
 //===---------------------------------------------------------------------===//