From 804137fd759b5ba66f7ef2589a9d1732ec05d9a1 Mon Sep 17 00:00:00 2001
From: Manman Ren <mren@apple.com>
Date: Fri, 10 Aug 2012 21:32:09 +0000
Subject: [PATCH] Add comments for turning on byval

llvm-svn: 161702
---
 clang/lib/CodeGen/TargetInfo.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/clang/lib/CodeGen/TargetInfo.cpp b/clang/lib/CodeGen/TargetInfo.cpp
index 752228e2a38f..2cd239c81a27 100644
--- a/clang/lib/CodeGen/TargetInfo.cpp
+++ b/clang/lib/CodeGen/TargetInfo.cpp
@@ -2757,6 +2757,8 @@ ABIArgInfo ARMABIInfo::classifyArgumentType(QualType Ty) const {
     }
   }
 
+  // Turn on byval for APCS and AAPCS.
+  // FIXME: turn on byval for AAPCS_VFP for performance.
   if (getABIKind() == ARMABIInfo::APCS || getABIKind() == ARMABIInfo::AAPCS) {
     if (getContext().getTypeSizeInChars(Ty) > CharUnits::fromQuantity(64) ||
         getContext().getTypeAlign(Ty) > 64) {