[llvm] r261354 - [WebAssembly] Add another optimization idea to README.txt.

[Dan Gohman via llvm-commits]

Author: djg
Date: Fri Feb 19 13:22:44 2016
New Revision: 261354

URL: http://llvm.org/viewvc/llvm-project?rev=261354&view=rev
Log:
[WebAssembly] Add another optimization idea to README.txt.

Modified:
    llvm/trunk/lib/Target/WebAssembly/README.txt

Modified: llvm/trunk/lib/Target/WebAssembly/README.txt
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/WebAssembly/README.txt?rev=261354&r1=261353&r2=261354&view=diff
==============================================================================
--- llvm/trunk/lib/Target/WebAssembly/README.txt (original)
+++ llvm/trunk/lib/Target/WebAssembly/README.txt Fri Feb 19 13:22:44 2016
@@ -100,3 +100,9 @@ WebAssembly registers are implicitly ini
 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.
+
+//===---------------------------------------------------------------------===//