diff --git a/llvm/lib/Target/X86/README.txt b/llvm/lib/Target/X86/README.txt
index 72965d0759c2..0bf8c4f8b4d3 100644
--- a/llvm/lib/Target/X86/README.txt
+++ b/llvm/lib/Target/X86/README.txt
@@ -23,6 +23,14 @@ generic code.
 
 //===---------------------------------------------------------------------===//
 
+CodeGen/X86/lea-3.ll:test3 should be a single LEA, not a shift/move.  The X86
+backend knows how to three-addressify this shift, but it appears the register
+allocator isn't even asking it to do so in this case.  We should investigate
+why this isn't happening, it could have significant impact on other important
+cases for X86 as well.
+
+//===---------------------------------------------------------------------===//
+
 This should be one DIV/IDIV instruction, not a libcall:
 
 unsigned test(unsigned long long X, unsigned Y) {