From: Chris Lattner <sabre@nondot.org>
Date: Thu, 10 Apr 2008 05:54:50 +0000 (+0000)
Subject: add a note, this is actually not too bad to implement.
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=2189c1744398958407f6802cd07177a292cc1416;p=oota-llvm.git

add a note, this is actually not too bad to implement.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49466 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Target/X86/README-SSE.txt b/lib/Target/X86/README-SSE.txt
index bbd93bf3ed4..5cccfa8daa4 100644
--- a/lib/Target/X86/README-SSE.txt
+++ b/lib/Target/X86/README-SSE.txt
@@ -472,7 +472,13 @@ _doload64:
 	addl	$12, %esp
 	ret
 
-instead of movsd from the stack.
+instead of movsd from the stack.  This is actually not too bad to implement. The
+best way to do this is to implement a dag combine that turns 
+bitconvert(build_pair(load a, load b)) into one load of the right type.  The
+only trick to this is writing the predicate that determines that a/b are at the
+right offset from each other.  For the enterprising hacker, InferAlignment is a
+helpful place to start poking if interested.
+
 
 //===---------------------------------------------------------------------===//