1; RUN: opt < %s -instcombine -S | grep " sub " | count 1 2; PR2047 3 4define i32 @l(i32 %a, i32 %b, i32 %c, i32 %d) { 5entry: 6 %b.neg = sub i32 0, %b ; <i32> [#uses=1] 7 %c.neg = sub i32 0, %c ; <i32> [#uses=1] 8 %sub4 = add i32 %c.neg, %b.neg ; <i32> [#uses=1] 9 %sub6 = add i32 %sub4, %d ; <i32> [#uses=1] 10 ret i32 %sub6 11} 12