-; RUN: llvm-as < %s | llc -march=x86 -tailcallopt | grep TAILCALL
-define fastcc i32 @tailcallee(i32 %a1, i32 %a2, i32 %a3, i32 %a4) {
+; RUN: llc < %s -march=x86 -tailcallopt | grep TAILCALL | count 5
+
+; With -tailcallopt, CodeGen guarantees a tail call optimization
+; for all of these.
+
+declare fastcc i32 @tailcallee(i32 %a1, i32 %a2, i32 %a3, i32 %a4)
+
+define fastcc i32 @tailcaller(i32 %in1, i32 %in2) nounwind {
entry:
- ret i32 %a3
+ %tmp11 = tail call fastcc i32 @tailcallee(i32 %in1, i32 %in2, i32 %in1, i32 %in2)
+ ret i32 %tmp11
}
-define fastcc i32 @tailcaller(i32 %in1, i32 %in2) {
-entry:
- %tmp11 = tail call fastcc i32 @tailcallee( i32 %in1, i32 %in2, i32 %in1, i32 %in2 ) ; <i32> [#uses=1]
- ret i32 %tmp11
+declare fastcc i8* @alias_callee()
+
+define fastcc noalias i8* @noalias_caller() nounwind {
+ %p = tail call fastcc i8* @alias_callee()
+ ret i8* %p
+}
+
+declare fastcc noalias i8* @noalias_callee()
+
+define fastcc i8* @alias_caller() nounwind {
+ %p = tail call fastcc noalias i8* @noalias_callee()
+ ret i8* %p
+}
+
+declare fastcc i32 @i32_callee()
+
+define fastcc i32 @ret_undef() nounwind {
+ %p = tail call fastcc i32 @i32_callee()
+ ret i32 undef
+}
+
+declare fastcc void @does_not_return()
+
+define fastcc i32 @noret() nounwind {
+ tail call fastcc void @does_not_return()
+ unreachable
}