From: Chris Lattner <sabre@nondot.org>
Date: Thu, 26 Aug 2010 20:08:43 +0000 (+0000)
Subject: improve comments.
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=7b733505defd34f1bb7e74d9526be0bc41e76693;p=clang

improve comments.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@112214 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/CodeGen/TargetInfo.cpp b/lib/CodeGen/TargetInfo.cpp
index 05bea0cf85..d2bd33258c 100644
--- a/lib/CodeGen/TargetInfo.cpp
+++ b/lib/CodeGen/TargetInfo.cpp
@@ -590,17 +590,14 @@ ABIArgInfo X86_32ABIInfo::classifyArgumentType(QualType Ty) const {
   }
 
   if (const VectorType *VT = Ty->getAs<VectorType>()) {
-    // On Darwin, some vectors are returned in registers.
+    // On Darwin, some vectors are passed in memory, we handle this by passing
+    // it as an i8/i16/i32/i64.
     if (IsDarwinVectorABI) {
       uint64_t Size = getContext().getTypeSize(Ty);
-      
-       // Always return in register if it fits in a general purpose
-      // register, or if it is 64 bits and has a single element.
       if ((Size == 8 || Size == 16 || Size == 32) ||
           (Size == 64 && VT->getNumElements() == 1))
         return ABIArgInfo::getDirect(llvm::IntegerType::get(getVMContext(),
                                                             Size));
-      
       return ABIArgInfo::getIndirect(0);
     }