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-rw-r--r--lib/Target/ARM/README-Thumb.txt5
1 files changed, 5 insertions, 0 deletions
diff --git a/lib/Target/ARM/README-Thumb.txt b/lib/Target/ARM/README-Thumb.txt
index ecef58a32d..3b27ed3889 100644
--- a/lib/Target/ARM/README-Thumb.txt
+++ b/lib/Target/ARM/README-Thumb.txt
@@ -232,3 +232,8 @@ Add ldmia, stmia support.
Thumb load / store address mode offsets are scaled. The values kept in the
instruction operands are pre-scale values. This probably ought to be changed
to avoid extra work when we convert Thumb2 instructions to Thumb1 instructions.
+
+//===---------------------------------------------------------------------===//
+
+We need to make (some of the) Thumb1 instructions predicable. That will allow
+shrinking of predicated Thumb2 instructions.