From 1e4ed935995b90ba58353decb8c8c5743c33d00a Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Mon, 28 Nov 2005 04:52:39 +0000
Subject: [PATCH] Add a missed optimization

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24495 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Target/X86/README.txt | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/lib/Target/X86/README.txt b/lib/Target/X86/README.txt
index 354439bfdb0..c9f23d598be 100644
--- a/lib/Target/X86/README.txt
+++ b/lib/Target/X86/README.txt
@@ -73,3 +73,12 @@ Another useful one would be  ~0ULL >> X and ~0ULL << X.
 Should support emission of the bswap instruction, probably by adding a new
 DAG node for byte swapping.  Also useful on PPC which has byte-swapping loads.
 
+//===---------------------------------------------------------------------===//
+
+Compile this:
+_Bool f(_Bool a) { return a!=1; }
+
+into:
+        movzbl  %dil, %eax
+        xorl    $1, %eax
+        ret
-- 
2.34.1