From: Chris Lattner <sabre@nondot.org>
Date: Sun, 25 Mar 2007 04:46:28 +0000 (+0000)
Subject: add a note
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=013e051aac1c3d5d4468eb83b3bc8cfa58cef421;p=oota-llvm.git

add a note


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35330 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Target/PowerPC/README.txt b/lib/Target/PowerPC/README.txt
index 932893eae1b..074dffce96e 100644
--- a/lib/Target/PowerPC/README.txt
+++ b/lib/Target/PowerPC/README.txt
@@ -625,3 +625,16 @@ _foo:   mr r0,r3
         blr
 
 ===-------------------------------------------------------------------------===
+
+test/CodeGen/PowerPC/2007-03-24-cntlzd.ll compiles to:
+
+__ZNK4llvm5APInt17countLeadingZerosEv:
+        ld r2, 0(r3)
+        cntlzd r2, r2
+        or r2, r2, r2     <<-- silly.
+        addi r3, r2, -64
+        blr 
+
+The dead or is a 'truncate' from 64- to 32-bits.
+
+===-------------------------------------------------------------------------===