From: Evan Cheng <evan.cheng@apple.com>
Date: Wed, 27 Jan 2010 00:10:09 +0000 (+0000)
Subject: Clarify what -tailcallopt option actually do.
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=8c86db58c83830199a39d1e64657f937c61f1f3a;p=oota-llvm.git

Clarify what -tailcallopt option actually do.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@94628 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Target/TargetMachine.cpp b/lib/Target/TargetMachine.cpp
index fec59b5e2b5..8d990443be1 100644
--- a/lib/Target/TargetMachine.cpp
+++ b/lib/Target/TargetMachine.cpp
@@ -174,7 +174,7 @@ DefCodeModel("code-model",
     clEnumValEnd));
 static cl::opt<bool, true>
 EnablePerformTailCallOpt("tailcallopt",
-  cl::desc("Turn on tail call optimization."),
+  cl::desc("Turn fastcc calls into tail calls by (potentially) changing ABI."),
   cl::location(PerformTailCallOpt),
   cl::init(false));
 static cl::opt<unsigned, true>