Update

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33998 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/ARM/README-Thumb.txt b/lib/Target/ARM/README-Thumb.txt
index 6c2cb710ab30a4af204207ad4ca4760e28946800..af02417d125d5cd0965b9d1c3ce1cce7d860179b 100644 (file)
--- a/lib/Target/ARM/README-Thumb.txt
+++ b/lib/Target/ARM/README-Thumb.txt
@@ -141,3 +141,7 @@ cheaper sequnce if we know it's ok to clobber the condition register.
 add r2, sp, #255 * 4
 add r2, #132
 ldr r2, [r2, #7 * 4]
+
+This is especially bad when dynamic alloca is used. The all fixed size stack
+objects are referenced off the frame pointer with negative offsets. See
+oggenc for an example.