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1; REQUIRES: asserts2; This function contains two tail calls, which should be eliminated3; RUN: opt < %s -passes=tailcallelim -verify-dom-info -stats -disable-output 2>&1 | grep "2 tailcallelim"4 5define i32 @Ack(i32 %M.1, i32 %N.1) {6entry:7 %tmp.1 = icmp eq i32 %M.1, 0 ; <i1> [#uses=1]8 br i1 %tmp.1, label %then.0, label %endif.09then.0: ; preds = %entry10 %tmp.4 = add i32 %N.1, 1 ; <i32> [#uses=1]11 ret i32 %tmp.412endif.0: ; preds = %entry13 %tmp.6 = icmp eq i32 %N.1, 0 ; <i1> [#uses=1]14 br i1 %tmp.6, label %then.1, label %endif.115then.1: ; preds = %endif.016 %tmp.10 = add i32 %M.1, -1 ; <i32> [#uses=1]17 %tmp.8 = call i32 @Ack( i32 %tmp.10, i32 1 ) ; <i32> [#uses=1]18 ret i32 %tmp.819endif.1: ; preds = %endif.020 %tmp.13 = add i32 %M.1, -1 ; <i32> [#uses=1]21 %tmp.17 = add i32 %N.1, -1 ; <i32> [#uses=1]22 %tmp.14 = call i32 @Ack( i32 %M.1, i32 %tmp.17 ) ; <i32> [#uses=1]23 %tmp.11 = call i32 @Ack( i32 %tmp.13, i32 %tmp.14 ) ; <i32> [#uses=1]24 ret i32 %tmp.1125}26 27