Refine stack slot interval weight computation.

[oota-llvm.git] / lib / CodeGen / README.txt

diff --git a/lib/CodeGen/README.txt b/lib/CodeGen/README.txt
index a05c08b1285ca3f13fbe341e9dc01c6c16970677..a66fc9dcdccd555575118e3302bc7214adf8e6b9 100644 (file)
--- a/lib/CodeGen/README.txt
+++ b/lib/CodeGen/README.txt
@@ -192,3 +192,8 @@ It would be good to detect collector/target compatibility instead of silently
 doing the wrong thing.
 
 //===---------------------------------------------------------------------===//
+
+It would be really nice to be able to write patterns in .td files for copies,
+which would eliminate a bunch of explicit predicates on them (e.g. no side 
+effects).  Once this is in place, it would be even better to have tblgen 
+synthesize the various copy insertion/inspection methods in TargetInstrInfo.