From 17a29a48474b5848b6e306bebc8068e3268fdfa2 Mon Sep 17 00:00:00 2001
From: Benjamin Kramer <benny.kra@googlemail.com>
Date: Wed, 25 Mar 2015 15:36:57 +0000
Subject: [PATCH] [Hexagon] Pattern match a CTZ loop into a call to
 countTrailingZeros.

No functional change intended.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@233192 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Target/Hexagon/HexagonISelDAGToDAG.cpp | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/lib/Target/Hexagon/HexagonISelDAGToDAG.cpp b/lib/Target/Hexagon/HexagonISelDAGToDAG.cpp
index 5bb4c095cf0..aaccac8b57a 100644
--- a/lib/Target/Hexagon/HexagonISelDAGToDAG.cpp
+++ b/lib/Target/Hexagon/HexagonISelDAGToDAG.cpp
@@ -1137,10 +1137,7 @@ SDNode *HexagonDAGToDAGISel::SelectBitOp(SDNode *N) {
       return SelectCode(N);
 
     // Get the bit position.
-    while (!(Val & 1)) {
-      Val >>= 1;
-      ++bitpos;
-    }
+    bitpos = countTrailingZeros(uint64_t(Val));
   } else {
     // For fabs and fneg, it's always the 31st bit.
     bitpos = 31;
-- 
2.11.0