1 ; This function contains two tail calls, which should be eliminated 2 ; RUN: opt < %s -tailcallelim -stats -disable-output |& grep {2 tailcallelim} 3 4 define i32 @Ack(i32 %M.1, i32 %N.1) { 5 entry: 6 %tmp.1 = icmp eq i32 %M.1, 0 ; <i1> [#uses=1] 7 br i1 %tmp.1, label %then.0, label %endif.0 8 then.0: ; preds = %entry 9 %tmp.4 = add i32 %N.1, 1 ; <i32> [#uses=1] 10 ret i32 %tmp.4 11 endif.0: ; preds = %entry 12 %tmp.6 = icmp eq i32 %N.1, 0 ; <i1> [#uses=1] 13 br i1 %tmp.6, label %then.1, label %endif.1 14 then.1: ; preds = %endif.0 15 %tmp.10 = add i32 %M.1, -1 ; <i32> [#uses=1] 16 %tmp.8 = call i32 @Ack( i32 %tmp.10, i32 1 ) ; <i32> [#uses=1] 17 ret i32 %tmp.8 18 endif.1: ; preds = %endif.0 19 %tmp.13 = add i32 %M.1, -1 ; <i32> [#uses=1] 20 %tmp.17 = add i32 %N.1, -1 ; <i32> [#uses=1] 21 %tmp.14 = call i32 @Ack( i32 %M.1, i32 %tmp.17 ) ; <i32> [#uses=1] 22 %tmp.11 = call i32 @Ack( i32 %tmp.13, i32 %tmp.14 ) ; <i32> [#uses=1] 23 ret i32 %tmp.11 24 } 25 26
