1 ; Third example from Doc/Coroutines.rst (two suspend points)
2 ; RUN: opt < %s -O2 -enable-coroutines -S | FileCheck %s
4 define i8* @f(i32 %n) {
6 %id = call token @llvm.coro.id(i32 0, i8* null, i8* null, i8* null)
7 %size = call i32 @llvm.coro.size.i32()
8 %alloc = call i8* @malloc(i32 %size)
9 %hdl = call noalias i8* @llvm.coro.begin(token %id, i8* %alloc)
12 %n.val = phi i32 [ %n, %entry ], [ %inc, %loop.resume ]
13 call void @print(i32 %n.val) #4
14 %0 = call i8 @llvm.coro.suspend(token none, i1 false)
15 switch i8 %0, label %suspend [i8 0, label %loop.resume
18 %inc = add nsw i32 %n.val, 1
19 %sub = xor i32 %n.val, -1
20 call void @print(i32 %sub)
21 %1 = call i8 @llvm.coro.suspend(token none, i1 false)
22 switch i8 %1, label %suspend [i8 0, label %loop
25 %mem = call i8* @llvm.coro.free(token %id, i8* %hdl)
26 call void @free(i8* %mem)
29 call i1 @llvm.coro.end(i8* %hdl, i1 false)
36 %hdl = call i8* @f(i32 4)
37 call void @llvm.coro.resume(i8* %hdl)
38 call void @llvm.coro.resume(i8* %hdl)
39 call void @llvm.coro.destroy(i8* %hdl)
41 ; CHECK: call void @print(i32 4)
42 ; CHECK-NEXT: call void @print(i32 -5)
43 ; CHECK-NEXT: call void @print(i32 5)
47 declare i8* @malloc(i32)
48 declare void @free(i8*)
49 declare void @print(i32)
51 declare token @llvm.coro.id(i32, i8*, i8*, i8*)
52 declare i1 @llvm.coro.alloc(token)
53 declare i32 @llvm.coro.size.i32()
54 declare i8* @llvm.coro.begin(token, i8*)
55 declare i8 @llvm.coro.suspend(token, i1)
56 declare i8* @llvm.coro.free(token, i8*)
57 declare i1 @llvm.coro.end(i8*, i1)
59 declare void @llvm.coro.resume(i8*)
60 declare void @llvm.coro.destroy(i8*)