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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 8fb9705c3e2cb3020b519fc67f23c8e4c9405339..4ba981798f40fd3c0e759d039815453715f8610a 100644 (file)
--- a/lib/Target/X86/README.txt
+++ b/lib/Target/X86/README.txt
@@ -282,3 +282,7 @@ This is bigger and slower.
 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.