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 { i8* }
6
7define i8* @f() "coroutine.presplit"="1" {
8entry:
9  %0 = alloca %"handle", align 8
10  %1 = alloca %"handle"*, align 8
11  %id = call token @llvm.coro.id(i32 0, i8* null, i8* null, i8* null)
12  %size = call i32 @llvm.coro.size.i32()
13  %alloc = call i8* @malloc(i32 %size)
14  %hdl = call i8* @llvm.coro.begin(token %id, i8* %alloc)
15  br label %tricky
16
17tricky:
18  %2 = call i8* @await_suspend()
19  %3 = getelementptr inbounds %"handle", %"handle"* %0, i32 0, i32 0
20  store i8* %2, i8** %3, align 8
21  %4 = bitcast %"handle"** %1 to i8*
22  call void @llvm.lifetime.start.p0i8(i64 8, i8* %4)
23  store %"handle"* %0, %"handle"** %1, align 8
24  %5 = load %"handle"*, %"handle"** %1, align 8
25  %6 = getelementptr inbounds %"handle", %"handle"* %5, i32 0, i32 0
26  %7 = load i8*, i8** %6, align 8
27  %8 = bitcast %"handle"** %1 to i8*
28  call void @llvm.lifetime.end.p0i8(i64 8, i8* %8)
29  br label %finish
30
31finish:
32  %sp1 = call i8 @llvm.coro.suspend(token none, i1 false)
33  switch i8 %sp1, label %suspend [i8 0, label %resume
34  i8 1, label %cleanup]
35resume:
36  br label %cleanup
37
38cleanup:
39  %mem = call i8* @llvm.coro.free(token %id, i8* %hdl)
40  call void @free(i8* %mem)
41  br label %suspend
42
43suspend:
44  call i1 @llvm.coro.end(i8* %hdl, i1 0)
45  ret i8* %hdl
46}
47
48; CHECK:        %f.Frame = type { void (%f.Frame*)*, void (%f.Frame*)*, i1 }
49; CHECK-LABEL: @f(
50; CHECK-NEXT:  entry:
51; CHECK-NEXT:    [[TMP0:%.*]] = alloca [[HANDLE:%.*]], align 8
52; CHECK-NEXT:    [[TMP1:%.*]] = alloca %handle*, align 8
53
54; CHECK:         [[TMP2:%.*]] = call i8* @await_suspend()
55; CHECK-NEXT:    [[TMP3:%.*]] = getelementptr inbounds [[HANDLE]], %handle* [[TMP0]], i32 0, i32 0
56; CHECK-NEXT:    store i8* [[TMP2]], i8** [[TMP3]], align 8
57; CHECK-NEXT:    [[TMP4:%.*]] = bitcast %handle** [[TMP1]] to i8*
58; CHECK-NEXT:    call void @llvm.lifetime.start.p0i8(i64 8, i8* [[TMP4]])
59; CHECK-NEXT:    store %handle* [[TMP0]], %handle** [[TMP1]], align 8
60; CHECK-NEXT:    call void @llvm.lifetime.end.p0i8(i64 8, i8* [[TMP4]])
61;
62
63declare i8* @llvm.coro.free(token, i8*)
64declare i32 @llvm.coro.size.i32()
65declare i8  @llvm.coro.suspend(token, i1)
66declare void @llvm.coro.resume(i8*)
67declare void @llvm.coro.destroy(i8*)
68
69declare token @llvm.coro.id(i32, i8*, i8*, i8*)
70declare i1 @llvm.coro.alloc(token)
71declare i8* @llvm.coro.begin(token, i8*)
72declare i1 @llvm.coro.end(i8*, i1)
73
74declare void @llvm.lifetime.start.p0i8(i64, i8* nocapture)
75declare void @llvm.lifetime.end.p0i8(i64, i8* nocapture)
76
77declare i8* @await_suspend()
78declare void @print(i32* nocapture)
79declare noalias i8* @malloc(i32)
80declare void @free(i8*)
81