From 4dbff7846efbe705567f85d4e5d29020272003c6 Mon Sep 17 00:00:00 2001
From: Dale Johannesen <dalej@apple.com>
Date: Wed, 4 Mar 2009 21:53:29 +0000
Subject: [PATCH] Add some cautionary comments.

llvm-svn: 66080
---
 include/llvm/Intrinsics.td | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/include/llvm/Intrinsics.td b/include/llvm/Intrinsics.td
index 6d008f3e3bf..779b64a5008 100644
--- a/include/llvm/Intrinsics.td
+++ b/include/llvm/Intrinsics.td
@@ -260,7 +260,9 @@ let Properties = [IntrNoMem] in {
 //===------------------------ Debugger Intrinsics -------------------------===//
 //
 
-// None of these intrinsics accesses memory at all.
+// None of these intrinsics accesses memory at all...but that doesn't mean the
+// optimizers can change them aggressively.  Special handling needed in a few
+// places.
 let Properties = [IntrNoMem] in {
   def int_dbg_stoppoint    : Intrinsic<[llvm_void_ty],
                                        [llvm_i32_ty, llvm_i32_ty,