1; RUN: llc -march=x86-64 < %s | not grep negq
2
3; These sequences don't need neg instructions; they can be done with
4; a single shift and sub each.
5
6define i64 @foo(i64 %x, i64 %y, i64 %n) nounwind {
7  %a = sub i64 0, %y
8  %b = shl i64 %a, %n
9  %c = add i64 %b, %x
10  ret i64 %c
11}
12define i64 @boo(i64 %x, i64 %y, i64 %n) nounwind {
13  %a = sub i64 0, %y
14  %b = shl i64 %a, %n
15  %c = add i64 %x, %b
16  ret i64 %c
17}
18