}
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
+}