New entry.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35480 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/ARM/README-Thumb.txt b/lib/Target/ARM/README-Thumb.txt
index 4da1876637cf7d7c1075e770eacd4a9aa7c67f5a..63bc004552c7f7b9078e8d1283dcddbba57d272c 100644 (file)
--- a/lib/Target/ARM/README-Thumb.txt
+++ b/lib/Target/ARM/README-Thumb.txt
@@ -167,3 +167,8 @@ LPC0:
        cpy r3, r6
        cpy lr, pc
        bx r5
+
+//===---------------------------------------------------------------------===//
+
+Make register allocator / spiller smarter so we can re-materialize "mov r, imm",
+etc. Almost all Thumb instructions clobber condition code.