xref: /llvm-project/llvm/test/Transforms/Coroutines/ArgAddr.ll (revision 94473f4db6a6f5f12d7c4081455b5b596094eac5) 
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 ptr @f(i32 %n) presplitcoroutine {
6; CHECK-LABEL: @f(
7; CHECK-NEXT:  entry:
8; CHECK-NEXT:    [[ID:%.*]] = call token @llvm.coro.id(i32 0, ptr null, ptr null, ptr @f.resumers)
9; CHECK-NEXT:    [[N_ADDR:%.*]] = alloca i32, align 4
10; CHECK-NEXT:    store i32 [[N:%.*]], ptr [[N_ADDR]], align 4
11; CHECK-NEXT:    [[CALL:%.*]] = tail call ptr @malloc(i32 24)
12; CHECK-NEXT:    [[TMP0:%.*]] = tail call noalias nonnull ptr @llvm.coro.begin(token [[ID]], ptr [[CALL]])
13; CHECK-NEXT:    store ptr @f.resume, ptr [[TMP0]], align 8
14; CHECK-NEXT:    [[DESTROY_ADDR:%.*]] = getelementptr inbounds nuw [[F_FRAME:%.*]], ptr [[TMP0]], i32 0, i32 1
15; CHECK-NEXT:    store ptr @f.destroy, ptr [[DESTROY_ADDR]], align 8
16; CHECK-NEXT:    [[TMP1:%.*]] = getelementptr inbounds [[F_FRAME]], ptr [[TMP0]], i32 0, i32 2
17; CHECK-NEXT:    [[TMP2:%.*]] = load i32, ptr [[N_ADDR]], align 4
18; CHECK-NEXT:    store i32 [[TMP2]], ptr [[TMP1]], align 4
19;
20entry:
21  %id = call token @llvm.coro.id(i32 0, ptr null, ptr null, ptr null);
22  %n.addr = alloca i32
23  store i32 %n, ptr %n.addr ; this needs to go after coro.begin
24  %0 = tail call i32 @llvm.coro.size.i32()
25  %call = tail call ptr @malloc(i32 %0)
26  %1 = tail call noalias nonnull ptr @llvm.coro.begin(token %id, ptr %call)
27  call void @ctor(ptr %n.addr)
28  br label %for.cond
29
30for.cond:
31  %2 = load i32, ptr %n.addr
32  %dec = add nsw i32 %2, -1
33  store i32 %dec, ptr %n.addr
34  call void @print(i32 %2)
35  %3 = call i8 @llvm.coro.suspend(token none, i1 false)
36  %conv = sext i8 %3 to i32
37  switch i32 %conv, label %coro_Suspend [
38  i32 0, label %for.cond
39  i32 1, label %coro_Cleanup
40  ]
41
42coro_Cleanup:
43  %4 = call ptr @llvm.coro.free(token %id, ptr nonnull %1)
44  call void @free(ptr %4)
45  br label %coro_Suspend
46
47coro_Suspend:
48  call i1 @llvm.coro.end(ptr null, i1 false, token none)
49  ret ptr %1
50}
51
52; CHECK-LABEL: @main
53define i32 @main() {
54entry:
55  %hdl = call ptr @f(i32 4)
56  call void @llvm.coro.resume(ptr %hdl)
57  call void @llvm.coro.resume(ptr %hdl)
58  call void @llvm.coro.destroy(ptr %hdl)
59  ret i32 0
60}
61
62declare ptr @malloc(i32)
63declare void @free(ptr)
64declare void @print(i32)
65declare void @ctor(ptr nocapture readonly)
66
67declare token @llvm.coro.id(i32, ptr, ptr, ptr)
68declare i32 @llvm.coro.size.i32()
69declare ptr @llvm.coro.begin(token, ptr)
70declare i8 @llvm.coro.suspend(token, i1)
71declare ptr @llvm.coro.free(token, ptr)
72declare i1 @llvm.coro.end(ptr, i1, token)
73
74declare void @llvm.coro.resume(ptr)
75declare void @llvm.coro.destroy(ptr)
76