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
75
76
77
78
79
80
81
82
83
84
85
86
87
|
; Tests that coro-split removes cleanup code after coro.end in resume functions
; and retains it in the start function.
; RUN: opt < %s -passes='cgscc(coro-split),simplifycfg,early-cse' -S | FileCheck %s
define ptr @f(i1 %val) presplitcoroutine personality i32 3 {
entry:
%id = call token @llvm.coro.id(i32 0, ptr null, ptr null, ptr null)
%hdl = call ptr @llvm.coro.begin(token %id, ptr null)
call void @print(i32 0)
br i1 %val, label %resume, label %susp
susp:
%0 = call i8 @llvm.coro.suspend(token none, i1 false)
switch i8 %0, label %suspend [i8 0, label %resume
i8 1, label %suspend]
resume:
invoke void @print(i32 1) to label %suspend unwind label %lpad
suspend:
call i1 @llvm.coro.end(ptr %hdl, i1 0)
call void @print(i32 0) ; should not be present in f.resume
ret ptr %hdl
lpad:
%lpval = landingpad { ptr, i32 }
cleanup
call void @print(i32 2)
%need.resume = call i1 @llvm.coro.end(ptr null, i1 true)
br i1 %need.resume, label %eh.resume, label %cleanup.cont
cleanup.cont:
call void @print(i32 3) ; should not be present in f.resume
br label %eh.resume
eh.resume:
resume { ptr, i32 } %lpval
}
; Verify that start function contains both print calls the one before and after coro.end
; CHECK-LABEL: define ptr @f(
; CHECK: invoke void @print(i32 1)
; CHECK: to label %AfterCoroEnd unwind label %lpad
; CHECK: AfterCoroEnd:
; CHECK: call void @print(i32 0)
; CHECK: ret ptr %hdl
; CHECK: lpad:
; CHECK-NEXT: %lpval = landingpad { ptr, i32 }
; CHECK-NEXT: cleanup
; CHECK-NEXT: call void @print(i32 2)
; CHECK-NEXT: call void @print(i32 3)
; CHECK-NEXT: resume { ptr, i32 } %lpval
; VERIFY Resume Parts
; Verify that resume function does not contains both print calls appearing after coro.end
; CHECK-LABEL: define internal fastcc void @f.resume
; CHECK: invoke void @print(i32 1)
; CHECK: to label %CoroEnd unwind label %lpad
; CHECK: CoroEnd:
; CHECK-NEXT: ret void
; CHECK: lpad:
; CHECK-NEXT: %lpval = landingpad { ptr, i32 }
; CHECK-NEXT: cleanup
; CHECK-NEXT: call void @print(i32 2)
; Checks that the coroutine would be marked as done if it exits in unwinding path.
; CHECK-NEXT: store ptr null, ptr %hdl, align 8
; CHECK-NEXT: resume { ptr, i32 } %lpval
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 ptr @llvm.coro.alloc(token)
declare ptr @llvm.coro.begin(token, ptr)
declare i1 @llvm.coro.end(ptr, i1)
declare noalias ptr @malloc(i32)
declare void @print(i32)
declare void @free(ptr)
|
