xref: /llvm-project/llvm/test/Transforms/Coroutines/phi-coro-end.ll (revision 51d5d7bbae92493a5bfa7cc6b519de8a5bb32fdb) 
1; Verify that we correctly handle suspend when the coro.end block contains phi
2; RUN: opt < %s -aa-pipeline=basic-aa -passes='default<O2>' -S | FileCheck %s
3
4define ptr @f(i32 %n) presplitcoroutine {
5entry:
6  %id = call token @llvm.coro.id(i32 0, ptr null, ptr null, ptr null)
7  %size = call i32 @llvm.coro.size.i32()
8  %alloc = call ptr @malloc(i32 %size)
9  %hdl = call ptr @llvm.coro.begin(token %id, ptr %alloc)
10  %0 = call i8 @llvm.coro.suspend(token none, i1 false)
11  switch i8 %0, label %suspend [i8 0, label %cleanup i8 1, label %cleanup]
12
13cleanup:
14  %mem = call ptr @llvm.coro.free(token %id, ptr %hdl)
15  call void @free(ptr %mem)
16  br label %suspend
17
18suspend:
19  %r = phi i32 [%n, %entry], [1, %cleanup]
20  call i1 @llvm.coro.end(ptr %hdl, i1 false, token none)
21  call void @print(i32 %r)
22  ret ptr %hdl
23}
24
25; CHECK-LABEL: @main
26define i32 @main() {
27entry:
28  %hdl = call ptr @f(i32 4)
29  call void @llvm.coro.resume(ptr %hdl)
30  ret i32 0
31;CHECK: call void @print(i32 4)
32;CHECK: ret i32 0
33}
34
35declare ptr @llvm.coro.alloc()
36declare i32 @llvm.coro.size.i32()
37declare ptr @llvm.coro.free(token, ptr)
38declare i8  @llvm.coro.suspend(token, i1)
39declare void @llvm.coro.resume(ptr)
40declare void @llvm.coro.destroy(ptr)
41
42declare token @llvm.coro.id(i32, ptr, ptr, ptr)
43declare ptr @llvm.coro.begin(token, ptr)
44declare i1 @llvm.coro.end(ptr, i1, token)
45
46declare noalias ptr @malloc(i32)
47declare void @print(i32)
48declare void @free(ptr)
49