From: Chris Lattner <sabre@nondot.org>
Date: Tue, 12 Sep 2006 06:36:01 +0000 (+0000)
Subject: add a note
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=adaa38f13de99b3e3369e853ed0b093311459f74;p=oota-llvm.git

add a note


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30271 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Target/X86/README.txt b/lib/Target/X86/README.txt
index 394201c3c19..110f399484b 100644
--- a/lib/Target/X86/README.txt
+++ b/lib/Target/X86/README.txt
@@ -628,3 +628,17 @@ _test:
 
 This saves a movzbl, and saves a truncate if it doesn't get coallesced right.
 This is a simple DAGCombine to propagate the zext through the and.
+
+//===---------------------------------------------------------------------===//
+
+Instead of:
+
+	cmpl $4294967295, %edx
+	jg LBB1_8	#cond_false49
+
+emit:
+
+	testl %edx, %edx
+	js LBB1_8
+
+This saves a byte of code space.