1 ; RUN: llc < %s -march=x86 -tailcallopt | grep TAILCALL | count 5 2 3 ; With -tailcallopt, CodeGen guarantees a tail call optimization 4 ; for all of these. 5 6 declare fastcc i32 @tailcallee(i32 %a1, i32 %a2, i32 %a3, i32 %a4) 7 8 define fastcc i32 @tailcaller(i32 %in1, i32 %in2) nounwind { 9 entry: 10 %tmp11 = tail call fastcc i32 @tailcallee(i32 %in1, i32 %in2, i32 %in1, i32 %in2) 11 ret i32 %tmp11 12 } 13 14 declare fastcc i8* @alias_callee() 15 16 define fastcc noalias i8* @noalias_caller() nounwind { 17 %p = tail call fastcc i8* @alias_callee() 18 ret i8* %p 19 } 20 21 declare fastcc noalias i8* @noalias_callee() 22 23 define fastcc i8* @alias_caller() nounwind { 24 %p = tail call fastcc noalias i8* @noalias_callee() 25 ret i8* %p 26 } 27 28 declare fastcc i32 @i32_callee() 29 30 define fastcc i32 @ret_undef() nounwind { 31 %p = tail call fastcc i32 @i32_callee() 32 ret i32 undef 33 } 34 35 declare fastcc void @does_not_return() 36 37 define fastcc i32 @noret() nounwind { 38 tail call fastcc void @does_not_return() 39 unreachable 40 } 41
