New note

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27337 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 6 insertions, 0 deletions

diff --git a/lib/Target/README.txt b/lib/Target/README.txt
index afb268d2e4..23503517c0 100644
--- a/lib/Target/README.txt
+++ b/lib/Target/README.txt
@@ -166,3 +166,9 @@ v4sf example(float *P) {
 
 //===---------------------------------------------------------------------===//
 
+We should constant fold packed type casts at the LLVM level, regardless of the
+cast.  Currently we cannot fold some casts because we don't have TargetData
+information in the constant folder, so we don't know the endianness of the 
+target!
+
+//===---------------------------------------------------------------------===//