From: Evan Cheng <evan.cheng@apple.com>
Date: Fri, 27 Jan 2006 22:54:32 +0000 (+0000)
Subject: A bit of wisdom from Chris on the last entry.
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=d41e9e5e7a5243fdda88587a96eadaac37093eea;p=oota-llvm.git

A bit of wisdom from Chris on the last entry.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25715 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Target/X86/README.txt b/lib/Target/X86/README.txt
index 9410a9acf8d..23087616446 100644
--- a/lib/Target/X86/README.txt
+++ b/lib/Target/X86/README.txt
@@ -187,4 +187,13 @@ fn1:
 	ret
 
 The problem is the store's chain operand is not the load X but rather
-a TokenFactor of the load X and load Y. This prevents the folding.
+a TokenFactor of the load X and load Y, which prevents the folding.
+
+There are two ways to fix this:
+
+1. The dag combiner can start using alias analysis to realize that y/x
+   don't alias, making the store to X not dependent on the load from Y.
+2. The generated isel could be made smarter in the case it can't
+   disambiguate the pointers.
+
+Number 1 is the preferred solution.