xref: /llvm-project/llvm/test/Transforms/Coroutines/coro-alloca-06.ll (revision 51d5d7bbae92493a5bfa7cc6b519de8a5bb32fdb) 
1; Test that in some simple cases allocas will not live on the frame even
2; though their pointers are stored.
3; RUN: opt < %s -passes='cgscc(coro-split),simplifycfg,early-cse' -S | FileCheck %s
4
5%handle = type { ptr }
6
7define ptr @f() presplitcoroutine {
8entry:
9  %0 = alloca %"handle", align 8
10  %1 = alloca ptr, align 8
11  %id = call token @llvm.coro.id(i32 0, ptr null, ptr null, ptr null)
12  %size = call i32 @llvm.coro.size.i32()
13  %alloc = call ptr @malloc(i32 %size)
14  %hdl = call ptr @llvm.coro.begin(token %id, ptr %alloc)
15  br label %tricky
16
17tricky:
18  %2 = call ptr @await_suspend()
19  store ptr %2, ptr %0, align 8
20  call void @llvm.lifetime.start.p0(i64 8, ptr %1)
21  store ptr %0, ptr %1, align 8
22  %3 = load ptr, ptr %1, align 8
23  %4 = load ptr, ptr %3, align 8
24  call void @llvm.lifetime.end.p0(i64 8, ptr %1)
25  br label %finish
26
27finish:
28  %sp1 = call i8 @llvm.coro.suspend(token none, i1 false)
29  switch i8 %sp1, label %suspend [i8 0, label %resume
30  i8 1, label %cleanup]
31resume:
32  br label %cleanup
33
34cleanup:
35  %mem = call ptr @llvm.coro.free(token %id, ptr %hdl)
36  call void @free(ptr %mem)
37  br label %suspend
38
39suspend:
40  call i1 @llvm.coro.end(ptr %hdl, i1 0, token none)
41  ret ptr %hdl
42}
43
44; CHECK:        %f.Frame = type { ptr, ptr, i1 }
45; CHECK-LABEL: @f(
46; CHECK-NEXT:  entry:
47; CHECK-NEXT:    [[TMP0:%.*]] = alloca [[HANDLE:%.*]], align 8
48; CHECK-NEXT:    [[TMP1:%.*]] = alloca ptr, align 8
49
50; CHECK:         [[TMP2:%.*]] = call ptr @await_suspend()
51; CHECK-NEXT:    store ptr [[TMP2]], ptr [[TMP0]], align 8
52; CHECK-NEXT:    call void @llvm.lifetime.start.p0(i64 8, ptr [[TMP1]])
53; CHECK-NEXT:    store ptr [[TMP0]], ptr [[TMP1]], align 8
54; CHECK-NEXT:    call void @llvm.lifetime.end.p0(i64 8, ptr [[TMP1]])
55;
56
57declare ptr @llvm.coro.free(token, ptr)
58declare i32 @llvm.coro.size.i32()
59declare i8  @llvm.coro.suspend(token, i1)
60declare void @llvm.coro.resume(ptr)
61declare void @llvm.coro.destroy(ptr)
62
63declare token @llvm.coro.id(i32, ptr, ptr, ptr)
64declare i1 @llvm.coro.alloc(token)
65declare ptr @llvm.coro.begin(token, ptr)
66declare i1 @llvm.coro.end(ptr, i1, token)
67
68declare void @llvm.lifetime.start.p0(i64, ptr nocapture)
69declare void @llvm.lifetime.end.p0(i64, ptr nocapture)
70
71declare ptr @await_suspend()
72declare void @print(ptr nocapture)
73declare noalias ptr @malloc(i32)
74declare void @free(ptr)
75