1; Need to move users of allocas that were moved into the coroutine frame after
2; coro.begin.
3; RUN: opt < %s -passes='cgscc(coro-split),simplifycfg,early-cse' -S | FileCheck %s
4
5define nonnull i8* @f(i32 %n) presplitcoroutine {
6; CHECK-LABEL: @f(
7; CHECK-NEXT:  entry:
8; CHECK-NEXT:    [[ID:%.*]] = call token @llvm.coro.id(i32 0, i8* null, i8* null, i8* bitcast ([3 x void (%f.Frame*)*]* @f.resumers to i8*))
9; CHECK-NEXT:    [[N_ADDR:%.*]] = alloca i32, align 4
10; CHECK-NEXT:    store i32 [[N:%.*]], i32* [[N_ADDR]], align 4
11; CHECK-NEXT:    [[CALL:%.*]] = tail call i8* @malloc(i32 24)
12; CHECK-NEXT:    [[TMP0:%.*]] = tail call noalias nonnull i8* @llvm.coro.begin(token [[ID]], i8* [[CALL]])
13; CHECK-NEXT:    [[FRAMEPTR:%.*]] = bitcast i8* [[TMP0]] to %f.Frame*
14; CHECK-NEXT:    [[RESUME_ADDR:%.*]] = getelementptr inbounds [[F_FRAME:%.*]], %f.Frame* [[FRAMEPTR]], i32 0, i32 0
15; CHECK-NEXT:    store void (%f.Frame*)* @f.resume, void (%f.Frame*)** [[RESUME_ADDR]], align 8
16; CHECK-NEXT:    [[DESTROY_ADDR:%.*]] = getelementptr inbounds [[F_FRAME]], %f.Frame* [[FRAMEPTR]], i32 0, i32 1
17; CHECK-NEXT:    store void (%f.Frame*)* @f.destroy, void (%f.Frame*)** [[DESTROY_ADDR]], align 8
18; CHECK-NEXT:    [[TMP1:%.*]] = getelementptr inbounds [[F_FRAME]], %f.Frame* [[FRAMEPTR]], i32 0, i32 2
19; CHECK-NEXT:    [[TMP2:%.*]] = load i32, i32* [[N_ADDR]], align 4
20; CHECK-NEXT:    store i32 [[TMP2]], i32* [[TMP1]], align 4
21;
22entry:
23  %id = call token @llvm.coro.id(i32 0, i8* null, i8* null, i8* null);
24  %n.addr = alloca i32
25  store i32 %n, i32* %n.addr ; this needs to go after coro.begin
26  %0 = tail call i32 @llvm.coro.size.i32()
27  %call = tail call i8* @malloc(i32 %0)
28  %1 = tail call noalias nonnull i8* @llvm.coro.begin(token %id, i8* %call)
29  %2 = bitcast i32* %n.addr to i8*
30  call void @ctor(i8* %2)
31  br label %for.cond
32
33for.cond:
34  %3 = load i32, i32* %n.addr
35  %dec = add nsw i32 %3, -1
36  store i32 %dec, i32* %n.addr
37  call void @print(i32 %3)
38  %4 = call i8 @llvm.coro.suspend(token none, i1 false)
39  %conv = sext i8 %4 to i32
40  switch i32 %conv, label %coro_Suspend [
41  i32 0, label %for.cond
42  i32 1, label %coro_Cleanup
43  ]
44
45coro_Cleanup:
46  %5 = call i8* @llvm.coro.free(token %id, i8* nonnull %1)
47  call void @free(i8* %5)
48  br label %coro_Suspend
49
50coro_Suspend:
51  call i1 @llvm.coro.end(i8* null, i1 false)
52  ret i8* %1
53}
54
55; CHECK-LABEL: @main
56define i32 @main() {
57entry:
58  %hdl = call i8* @f(i32 4)
59  call void @llvm.coro.resume(i8* %hdl)
60  call void @llvm.coro.resume(i8* %hdl)
61  call void @llvm.coro.destroy(i8* %hdl)
62  ret i32 0
63}
64
65declare i8* @malloc(i32)
66declare void @free(i8*)
67declare void @print(i32)
68declare void @ctor(i8* nocapture readonly)
69
70declare token @llvm.coro.id(i32, i8*, i8*, i8*)
71declare i32 @llvm.coro.size.i32()
72declare i8* @llvm.coro.begin(token, i8*)
73declare i8 @llvm.coro.suspend(token, i1)
74declare i8* @llvm.coro.free(token, i8*)
75declare i1 @llvm.coro.end(i8*, i1)
76
77declare void @llvm.coro.resume(i8*)
78declare void @llvm.coro.destroy(i8*)
79