xref: /llvm-project/llvm/test/Transforms/Coroutines/coro-split-hidden.ll (revision 51d5d7bbae92493a5bfa7cc6b519de8a5bb32fdb)
1; Tests that coro-split can convert functions with hidden visibility.
2; These may be generated by a frontend such as Clang, when inlining with
3; '-fvisibility-inlines-hidden'.
4; RUN: opt < %s -passes='cgscc(coro-split),simplifycfg,early-cse' -S | FileCheck %s
5
6define hidden ptr @f() presplitcoroutine {
7entry:
8  %id = call token @llvm.coro.id(i32 0, ptr null, ptr null, ptr null)
9  %need.alloc = call i1 @llvm.coro.alloc(token %id)
10  br i1 %need.alloc, label %dyn.alloc, label %begin
11
12dyn.alloc:
13  %size = call i32 @llvm.coro.size.i32()
14  %alloc = call ptr @malloc(i32 %size)
15  br label %begin
16
17begin:
18  %phi = phi ptr [ null, %entry ], [ %alloc, %dyn.alloc ]
19  %hdl = call ptr @llvm.coro.begin(token %id, ptr %phi)
20  call void @print(i32 0)
21  %0 = call i8 @llvm.coro.suspend(token none, i1 false)
22  switch i8 %0, label %suspend [i8 0, label %resume
23                                i8 1, label %cleanup]
24resume:
25  call void @print(i32 1)
26  br label %cleanup
27
28cleanup:
29  %mem = call ptr @llvm.coro.free(token %id, ptr %hdl)
30  call void @free(ptr %mem)
31  br label %suspend
32suspend:
33  call i1 @llvm.coro.end(ptr %hdl, i1 0, token none)
34  ret ptr %hdl
35}
36
37; CHECK-LABEL: hidden{{.*}}@f(
38; CHECK: call ptr @malloc
39; CHECK: @llvm.coro.begin(token %id, ptr %phi)
40; CHECK: store ptr @f.resume, ptr %hdl
41; CHECK: %[[SEL:.+]] = select i1 %need.alloc, ptr @f.destroy, ptr @f.cleanup
42; CHECK: store ptr %[[SEL]], ptr %destroy.addr
43; CHECK: call void @print(i32 0)
44; CHECK-NOT: call void @print(i32 1)
45; CHECK-NOT: call void @free(
46; CHECK: ret ptr %hdl
47
48; CHECK-LABEL: internal{{.*}}@f.resume(
49; CHECK-NOT: call ptr @malloc
50; CHECK-NOT: call void @print(i32 0)
51; CHECK: call void @print(i32 1)
52; CHECK-NOT: call void @print(i32 0)
53; CHECK: call void @free(
54; CHECK: ret void
55
56; CHECK-LABEL: internal{{.*}}@f.destroy(
57; CHECK-NOT: call ptr @malloc
58; CHECK-NOT: call void @print(
59; CHECK: call void @free(
60; CHECK: ret void
61
62; CHECK-LABEL: internal{{.*}}@f.cleanup(
63; CHECK-NOT: call ptr @malloc
64; CHECK-NOT: call void @print(
65; CHECK-NOT: call void @free(
66; CHECK: ret void
67
68declare ptr @llvm.coro.free(token, ptr)
69declare i32 @llvm.coro.size.i32()
70declare i8  @llvm.coro.suspend(token, i1)
71declare void @llvm.coro.resume(ptr)
72declare void @llvm.coro.destroy(ptr)
73
74declare token @llvm.coro.id(i32, ptr, ptr, ptr)
75declare i1 @llvm.coro.alloc(token)
76declare ptr @llvm.coro.begin(token, ptr)
77declare i1 @llvm.coro.end(ptr, i1, token)
78
79declare noalias ptr @malloc(i32) allockind("alloc,uninitialized")
80declare void @print(i32)
81declare void @free(ptr) willreturn allockind("free")
82