This is done already.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42467 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/CodeGen/README.txt b/lib/CodeGen/README.txt
index 8bd9a7af0d00dc649113f5296de51b4148f3eef6..1e2837580ac90a19460b0bd2cad8a34200e38c0d 100644 (file)
--- a/lib/CodeGen/README.txt
+++ b/lib/CodeGen/README.txt
@@ -151,13 +151,6 @@ an example.
 
 //===---------------------------------------------------------------------===//
 
-Instead of unconditionally inserting a null initializer for every GC root when
-Collector::InitRoots is set, the collector infrastructure should get a little
-bit smarter and perform a trivial DSE of the initial basic block up to the
-first safe point.
-
-//===---------------------------------------------------------------------===//
-
 With a copying garbage collector, derived pointers must not be retained across
 collector safe points; the collector could move the objects and invalidate the
 derived pointer. This is bad enough in the first place, but safe points can