From: Evan Cheng <evan.cheng@apple.com>
Date: Fri, 13 Jan 2006 01:20:42 +0000 (+0000)
Subject: Minor update.
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=e08c270623599861b7269f8dad533abe7e57771f;p=oota-llvm.git

Minor update.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25263 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Target/X86/README.txt b/lib/Target/X86/README.txt
index a08e8fd4583..4869c5e956d 100644
--- a/lib/Target/X86/README.txt
+++ b/lib/Target/X86/README.txt
@@ -112,3 +112,12 @@ FP_TO_SINT when the source operand is already in memory.
 //===---------------------------------------------------------------------===//
 
 Check if load folding would add a cycle in the dag.
+
+//===---------------------------------------------------------------------===//
+
+Model X86 EFLAGS as a real register to avoid redudant cmp / test. e.g.
+
+	cmpl $1, %eax
+	setg %al
+	testb %al, %al  # unnecessary
+	jne .BB7