[WebAssembly] Refine a README.txt entry.

The register coloring pass may also need to be involved in order to
optimally sort registers.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@261458 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/WebAssembly/README.txt b/lib/Target/WebAssembly/README.txt
index a2b35b2..6bcb9e2 100644 (file)
--- a/lib/Target/WebAssembly/README.txt
+++ b/lib/Target/WebAssembly/README.txt
@@ -102,7 +102,7 @@ therefore often redundant and could be optimized away.
 //===---------------------------------------------------------------------===//
 
 Small indices may use smaller encodings than large indices.
-WebAssemblyRegRenumbering should sort registers according to their usage
-frequency to maximize the usage of smaller encodings.
+WebAssemblyRegColoring and/or WebAssemblyRegRenumbering should sort registers
+according to their usage frequency to maximize the usage of smaller encodings.
 
 //===---------------------------------------------------------------------===//