1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
|
; Test that in some simple cases allocas will not live on the frame even
; though their pointers are stored.
; RUN: opt < %s -passes='cgscc(coro-split),simplifycfg,early-cse' -S | FileCheck %s
%handle = type { ptr }
define ptr @f() presplitcoroutine {
entry:
%0 = alloca %"handle", align 8
%1 = alloca ptr, align 8
%id = call token @llvm.coro.id(i32 0, ptr null, ptr null, ptr null)
%size = call i32 @llvm.coro.size.i32()
%alloc = call ptr @malloc(i32 %size)
%hdl = call ptr @llvm.coro.begin(token %id, ptr %alloc)
br label %tricky
tricky:
%2 = call ptr @await_suspend()
store ptr %2, ptr %0, align 8
call void @llvm.lifetime.start.p0(i64 8, ptr %1)
store ptr %0, ptr %1, align 8
%3 = load ptr, ptr %1, align 8
%4 = load ptr, ptr %3, align 8
call void @llvm.lifetime.end.p0(i64 8, ptr %1)
br label %finish
finish:
%sp1 = call i8 @llvm.coro.suspend(token none, i1 false)
switch i8 %sp1, label %suspend [i8 0, label %resume
i8 1, label %cleanup]
resume:
br label %cleanup
cleanup:
%mem = call ptr @llvm.coro.free(token %id, ptr %hdl)
call void @free(ptr %mem)
br label %suspend
suspend:
call i1 @llvm.coro.end(ptr %hdl, i1 0)
ret ptr %hdl
}
; CHECK: %f.Frame = type { ptr, ptr, i1 }
; CHECK-LABEL: @f(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[TMP0:%.*]] = alloca [[HANDLE:%.*]], align 8
; CHECK-NEXT: [[TMP1:%.*]] = alloca ptr, align 8
; CHECK: [[TMP2:%.*]] = call ptr @await_suspend()
; CHECK-NEXT: store ptr [[TMP2]], ptr [[TMP0]], align 8
; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 8, ptr [[TMP1]])
; CHECK-NEXT: store ptr [[TMP0]], ptr [[TMP1]], align 8
; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 8, ptr [[TMP1]])
;
declare ptr @llvm.coro.free(token, ptr)
declare i32 @llvm.coro.size.i32()
declare i8 @llvm.coro.suspend(token, i1)
declare void @llvm.coro.resume(ptr)
declare void @llvm.coro.destroy(ptr)
declare token @llvm.coro.id(i32, ptr, ptr, ptr)
declare i1 @llvm.coro.alloc(token)
declare ptr @llvm.coro.begin(token, ptr)
declare i1 @llvm.coro.end(ptr, i1)
declare void @llvm.lifetime.start.p0(i64, ptr nocapture)
declare void @llvm.lifetime.end.p0(i64, ptr nocapture)
declare ptr @await_suspend()
declare void @print(ptr nocapture)
declare noalias ptr @malloc(i32)
declare void @free(ptr)
|
