Update comments and documentation to reflect that GCSE and ValueNumbering are
deprecated by the GVN and GVNPRE passes.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51983 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/Scalar/GCSE.cpp b/lib/Transforms/Scalar/GCSE.cpp
index 35752bb..94cdcb1 100644
--- a/lib/Transforms/Scalar/GCSE.cpp
+++ b/lib/Transforms/Scalar/GCSE.cpp
@@ -9,9 +9,12 @@
//
// This pass is designed to be a very quick global transformation that
// eliminates global common subexpressions from a function. It does this by
-// using an existing value numbering implementation to identify the common
+// using an existing value numbering analysis pass to identify the common
// subexpressions, eliminating them when possible.
//
+// This pass is deprecated by the Global Value Numbering pass (which does a
+// better job with its own value numbering).
+//
//===----------------------------------------------------------------------===//
#define DEBUG_TYPE "gcse"