add another note
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25789 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/README.txt b/lib/Target/X86/README.txt
index 8fb9705..4ba9817 100644
--- a/lib/Target/X86/README.txt
+++ b/lib/Target/X86/README.txt
@@ -282,3 +282,7 @@
LSR should be turned on for the X86 backend and tuned to take advantage of its
addressing modes.
+//===---------------------------------------------------------------------===//
+
+When compiled with unsafemath enabled, "main" should enable SSE DAZ mode and
+other fast SSE modes.