From: Dan Gohman <dan433584@gmail.com>
Date: Wed, 23 Dec 2015 00:22:04 +0000 (+0000)
Subject: [WebAssembly] Add a TODO comment for a possible future optimization.
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=97cdf9dc307204455ec70756226c9799afddcd4c;p=oota-llvm.git

[WebAssembly] Add a TODO comment for a possible future optimization.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@256306 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Target/WebAssembly/WebAssemblyRegNumbering.cpp b/lib/Target/WebAssembly/WebAssemblyRegNumbering.cpp
index 0a945336a2b..f621db070b5 100644
--- a/lib/Target/WebAssembly/WebAssemblyRegNumbering.cpp
+++ b/lib/Target/WebAssembly/WebAssemblyRegNumbering.cpp
@@ -82,7 +82,8 @@ bool WebAssemblyRegNumbering::runOnMachineFunction(MachineFunction &MF) {
   }
 
   // Then assign regular WebAssembly registers for all remaining used
-  // virtual registers.
+  // virtual registers. TODO: Consider sorting the registers by frequency of
+  // use, to maximize usage of small immediate fields.
   unsigned NumArgRegs = MFI.getParams().size();
   unsigned NumVRegs = MF.getRegInfo().getNumVirtRegs();
   unsigned NumStackRegs = 0;