1; RUN: opt < %s -constprop -S | grep "ret i13 13"
2; PR1816
3declare i13 @llvm.cttz.i13(i13, i1)
4
5define i13 @test() {
6	%X = call i13 @llvm.cttz.i13(i13 0, i1 false)
7	ret i13 %X
8}
9