From ece02cd5829cea836e9365b0845a8ef042d17b0a Mon Sep 17 00:00:00 2001
From: dim <dim@FreeBSD.org>
Date: Sun, 12 Jun 2011 15:42:51 +0000
Subject: Vendor import of llvm trunk r132879:
 http://llvm.org/svn/llvm-project/llvm/trunk@132879

---
 test/CodeGen/X86/clz.ll | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

(limited to 'test/CodeGen/X86/clz.ll')

diff --git a/test/CodeGen/X86/clz.ll b/test/CodeGen/X86/clz.ll
index 623ac75..d76fab4 100644
--- a/test/CodeGen/X86/clz.ll
+++ b/test/CodeGen/X86/clz.ll
@@ -31,3 +31,18 @@ entry:
 }
 
 declare i16 @llvm.ctlz.i16(i16) nounwind readnone 
+
+; Don't generate the cmovne when the source is known non-zero (and bsr would
+; not set ZF).
+; rdar://9490949
+
+define i32 @t4(i32 %n) nounwind {
+entry:
+; CHECK: t4:
+; CHECK: bsrl
+; CHECK-NOT: cmov
+; CHECK: ret
+  %or = or i32 %n, 1
+  %tmp1 = tail call i32 @llvm.ctlz.i32(i32 %or)
+  ret i32 %tmp1
+}
-- 
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