From 71bcc67a0fa0adf4a436bddf245da8a57010d8cf Mon Sep 17 00:00:00 2001
From: Nate Begeman <natebegeman@mac.com>
Date: Wed, 11 May 2005 23:45:54 +0000
Subject: [PATCH] Add testcase for legalizing ISD::CTTZ efficiently.  On PPC,
 ctlz(int) is now codegen'd as this:

        addi r2, r3, -1
        andc r2, r2, r3
        cntlzw r2, r2
        subfic r3, r2, 32
        blr

llvm-svn: 21881
---
 test/Regression/CodeGen/PowerPC/cttz.ll | 12 ++++++++++++
 1 file changed, 12 insertions(+)
 create mode 100644 test/Regression/CodeGen/PowerPC/cttz.ll

diff --git a/test/Regression/CodeGen/PowerPC/cttz.ll b/test/Regression/CodeGen/PowerPC/cttz.ll
new file mode 100644
index 00000000000..f860456d647
--- /dev/null
+++ b/test/Regression/CodeGen/PowerPC/cttz.ll
@@ -0,0 +1,12 @@
+; Make sure this testcase does not use ctpop
+; RUN: llvm-as < %s | llc -march=ppc32 | grep -i 'cntlzw'
+
+declare int %llvm.cttz(int)
+
+implementation   ; Functions:
+
+int %bar(int %x) {
+entry:
+	%tmp.1 = call int %llvm.cttz( int %x ) 
+	ret int %tmp.1
+}