--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/llvm/test/Feature/indirectcall.ll	Thu Feb 13 15:10:13 2020 +0900
@@ -0,0 +1,49 @@
+; RUN: llvm-as < %s | llvm-dis > %t1.ll
+; RUN: llvm-as %t1.ll -o - | llvm-dis > %t2.ll
+; RUN: diff %t1.ll %t2.ll
+
+declare i32 @atoi(i8*)
+
+define i64 @fib(i64 %n) {
+        icmp ult i64 %n, 2              ; <i1>:1 [#uses=1]
+        br i1 %1, label %BaseCase, label %RecurseCase
+
+BaseCase:               ; preds = %0
+        ret i64 1
+
+RecurseCase:            ; preds = %0
+        %n2 = sub i64 %n, 2             ; <i64> [#uses=1]
+        %n1 = sub i64 %n, 1             ; <i64> [#uses=1]
+        %f2 = call i64 @fib( i64 %n2 )          ; <i64> [#uses=1]
+        %f1 = call i64 @fib( i64 %n1 )          ; <i64> [#uses=1]
+        %result = add i64 %f2, %f1              ; <i64> [#uses=1]
+        ret i64 %result
+}
+
+define i64 @realmain(i32 %argc, i8** %argv) {
+; <label>:0
+        icmp eq i32 %argc, 2            ; <i1>:1 [#uses=1]
+        br i1 %1, label %HasArg, label %Continue
+
+HasArg:         ; preds = %0
+        %n1 = add i32 1, 1              ; <i32> [#uses=1]
+        br label %Continue
+
+Continue:               ; preds = %HasArg, %0
+        %n = phi i32 [ %n1, %HasArg ], [ 1, %0 ]                ; <i32> [#uses=1]
+        %N = sext i32 %n to i64         ; <i64> [#uses=1]
+        %F = call i64 @fib( i64 %N )            ; <i64> [#uses=1]
+        ret i64 %F
+}
+
+define i64 @trampoline(i64 %n, i64 (i64)* %fibfunc) {
+        %F = call i64 %fibfunc( i64 %n )                ; <i64> [#uses=1]
+        ret i64 %F
+}
+
+define i32 @main() {
+        %Result = call i64 @trampoline( i64 10, i64 (i64)* @fib )               ; <i64> [#uses=1]
+        %Result.upgrd.1 = trunc i64 %Result to i32              ; <i32> [#uses=1]
+        ret i32 %Result.upgrd.1
+}
+