diff options
| -rw-r--r-- | lib/Target/ARM/README-Thumb.txt | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/Target/ARM/README-Thumb.txt b/lib/Target/ARM/README-Thumb.txt index 6c2cb710ab..af02417d12 100644 --- 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. |