1; Need to move users of allocas that were moved into the coroutine frame after
2; coro.begin.
3; RUN: opt < %s -O2 -enable-coroutines -S | FileCheck %s
4
5define nonnull i8* @f(i32 %n) {
6entry:
7  %id = call token @llvm.coro.id(i32 0, i8* null, i8* null, i8* null);
8  %n.addr = alloca i32
9  store i32 %n, i32* %n.addr ; this needs to go after coro.begin
10  %0 = tail call i32 @llvm.coro.size.i32()
11  %call = tail call i8* @malloc(i32 %0)
12  %1 = tail call noalias nonnull i8* @llvm.coro.begin(token %id, i8* %call)
13  %2 = bitcast i32* %n.addr to i8*
14  call void @ctor(i8* %2)
15  br label %for.cond
16
17for.cond:
18  %3 = load i32, i32* %n.addr
19  %dec = add nsw i32 %3, -1
20  store i32 %dec, i32* %n.addr
21  call void @print(i32 %3)
22  %4 = call i8 @llvm.coro.suspend(token none, i1 false)
23  %conv = sext i8 %4 to i32
24  switch i32 %conv, label %coro_Suspend [
25    i32 0, label %for.cond
26    i32 1, label %coro_Cleanup
27  ]
28
29coro_Cleanup:
30  %5 = call i8* @llvm.coro.free(token %id, i8* nonnull %1)
31  call void @free(i8* %5)
32  br label %coro_Suspend
33
34coro_Suspend:
35  call void @llvm.coro.end(i8* null, i1 false)
36  ret i8* %1
37}
38
39; CHECK-LABEL: @main
40define i32 @main() {
41entry:
42  %hdl = call i8* @f(i32 4)
43  call void @llvm.coro.resume(i8* %hdl)
44  call void @llvm.coro.resume(i8* %hdl)
45  call void @llvm.coro.destroy(i8* %hdl)
46  ret i32 0
47; CHECK:      call void @ctor
48; CHECK-NEXT: call void @print(i32 4)
49; CHECK-NEXT: call void @print(i32 3)
50; CHECK-NEXT: call void @print(i32 2)
51; CHECK:      ret i32 0
52}
53
54declare i8* @malloc(i32)
55declare void @free(i8*)
56declare void @print(i32)
57declare void @ctor(i8* nocapture readonly)
58
59declare token @llvm.coro.id(i32, i8*, i8*, i8*)
60declare i32 @llvm.coro.size.i32()
61declare i8* @llvm.coro.begin(token, i8*)
62declare i8 @llvm.coro.suspend(token, i1)
63declare i8* @llvm.coro.free(token, i8*)
64declare void @llvm.coro.end(i8*, i1)
65
66declare void @llvm.coro.resume(i8*)
67declare void @llvm.coro.destroy(i8*)
68