From 952b7d6a1efc3b02fee379aeae4765feac2aa726 Mon Sep 17 00:00:00 2001
From: Evan Cheng <evan.cheng@apple.com>
Date: Tue, 14 Feb 2006 08:25:32 +0000
Subject: [PATCH] Add a entry.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26173 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Target/X86/README.txt | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/lib/Target/X86/README.txt b/lib/Target/X86/README.txt
index 3bbf3c26e41..50d87bc173a 100644
--- a/lib/Target/X86/README.txt
+++ b/lib/Target/X86/README.txt
@@ -426,3 +426,20 @@ When: "movl $_dst, _ptr" is sufficient.
 //===---------------------------------------------------------------------===//
 
 Use fisttp to do FP to integer conversion whenever it is available.
+
+//===---------------------------------------------------------------------===//
+
+Instead of the following for memset char*, 1, 10:
+
+	movl $16843009, 4(%edx)
+	movl $16843009, (%edx)
+	movw $257, 8(%edx)
+
+It might be better to generate
+
+	movl $16843009, %eax
+	movl %eax, 4(%edx)
+	movl %eax, (%edx)
+	movw al, 8(%edx)
+	
+when we can spare a register. It reduces code size.