From: Dan Gohman <gohman@apple.com>
Date: Thu, 29 Apr 2010 16:57:54 +0000 (+0000)
Subject: Elaborate on a comment.
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=5768ea9ca1409d7686b64607d6e0ad87d9d84c23;p=oota-llvm.git

Elaborate on a comment.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102637 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/include/llvm/CodeGen/ISDOpcodes.h b/include/llvm/CodeGen/ISDOpcodes.h
index eb922e99744..ba554d335d8 100644
--- a/include/llvm/CodeGen/ISDOpcodes.h
+++ b/include/llvm/CodeGen/ISDOpcodes.h
@@ -95,8 +95,11 @@ namespace ISD {
     // execution to HANDLER. Many platform-related details also :)
     EH_RETURN,
 
-    // TargetConstant* - Like Constant*, but the DAG does not do any folding or
-    // simplification of the constant.
+    // TargetConstant* - Like Constant*, but the DAG does not do any folding,
+    // simplification, or lowering of the constant. They are used for constants
+    // which are known to fit in the immediate fields of their users, or for
+    // carrying magic numbers which are not values which need to be materialized
+    // in registers.
     TargetConstant,
     TargetConstantFP,